[openwrt/openwrt] mvebu: puzzle-m902: add driver for MCU driving LEDs, fan and buzzer
LEDE Commits
lede-commits at lists.infradead.org
Sat Jan 1 14:31:22 PST 2022
dangole pushed a commit to openwrt/openwrt.git, branch openwrt-21.02:
https://git.openwrt.org/99a1e882970f02d3713b3d67022af012b782a5f4
commit 99a1e882970f02d3713b3d67022af012b782a5f4
Author: Daniel Golle <daniel at makrotopia.org>
AuthorDate: Tue Dec 21 16:27:16 2021 +0000
mvebu: puzzle-m902: add driver for MCU driving LEDs, fan and buzzer
Backport MFD driver for communicating with the on-board MCU found on
IEI World Puzzle appliances.
Improve the driver to support multiple LEDs, apply a default state and
let MCU take care of blinking if timing is within supported range.
Wire up LEDs and fan for Puzzle M902 in device tree.
Signed-off-by: Daniel Golle <daniel at makrotopia.org>
(cherry picked from commit f0c0b18234418c6ed6d35fcf1c6e5b0cbdceed49
with commit 962c58558010bd302793ac24284c4f9db8fe287f squashed)
---
target/linux/mvebu/cortexa72/config-5.4 | 6 +
.../arm64/boot/dts/marvell/cn9132-puzzle-m902.dts | 74 +-
...-Add-IEI-vendor-prefix-and-IEI-WT61P803-P.patch | 218 +++++
...-Add-a-driver-for-IEI-WT61P803-PUZZLE-MCU.patch | 1034 ++++++++++++++++++++
...on-Add-the-IEI-WT61P803-PUZZLE-HWMON-driv.patch | 469 +++++++++
...ds-Add-the-IEI-WT61P803-PUZZLE-LED-driver.patch | 207 ++++
...on-ABI-Add-iei-wt61p803-puzzle-driver-sys.patch | 82 ++
...on-hwmon-Add-iei-wt61p803-puzzle-hwmon-dr.patch | 74 ++
...-Add-an-entry-for-the-IEI-WT61P803-PUZZLE.patch | 41 +
...drivers-leds-wt61p803-puzzle-improvements.patch | 247 +++++
10 files changed, 2451 insertions(+), 1 deletion(-)
diff --git a/target/linux/mvebu/cortexa72/config-5.4 b/target/linux/mvebu/cortexa72/config-5.4
index 5727ae5918..106724dc3b 100644
--- a/target/linux/mvebu/cortexa72/config-5.4
+++ b/target/linux/mvebu/cortexa72/config-5.4
@@ -130,7 +130,9 @@ CONFIG_INLINE_WRITE_LOCK_IRQ=y
CONFIG_INLINE_WRITE_LOCK_IRQSAVE=y
CONFIG_INLINE_WRITE_UNLOCK_BH=y
CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE=y
+CONFIG_LEDS_IEI_WT61P803_PUZZLE=y
CONFIG_MARVELL_10G_PHY=y
+CONFIG_MFD_IEI_WT61P803_PUZZLE=y
CONFIG_MFD_SYSCON=y
CONFIG_MMC_SDHCI_XENON=y
CONFIG_MODULES_USE_ELF_RELA=y
@@ -161,7 +163,11 @@ CONFIG_QUEUED_RWLOCKS=y
CONFIG_QUEUED_SPINLOCKS=y
# CONFIG_RANDOMIZE_BASE is not set
CONFIG_RAS=y
+# CONFIG_RAVE_SP_CORE is not set
CONFIG_REGULATOR_GPIO=y
+CONFIG_SENSORS_IEI_WT61P803_PUZZLE_HWMON=y
+CONFIG_SERIAL_DEV_BUS=y
+CONFIG_SERIAL_DEV_CTRL_TTYPORT=y
# CONFIG_SERIAL_AMBA_PL011 is not set
CONFIG_SPARSEMEM=y
CONFIG_SPARSEMEM_EXTREME=y
diff --git a/target/linux/mvebu/files/arch/arm64/boot/dts/marvell/cn9132-puzzle-m902.dts b/target/linux/mvebu/files/arch/arm64/boot/dts/marvell/cn9132-puzzle-m902.dts
index dc4e6527f1..8d2d53d03c 100644
--- a/target/linux/mvebu/files/arch/arm64/boot/dts/marvell/cn9132-puzzle-m902.dts
+++ b/target/linux/mvebu/files/arch/arm64/boot/dts/marvell/cn9132-puzzle-m902.dts
@@ -38,7 +38,10 @@
ethernet8 = &cp2_eth2;
spi1 = &cp0_spi0;
spi2 = &cp0_spi1;
- serial1 = &cp0_uart0;
+ led-boot = &led_power;
+ led-failsafe = &led_info;
+ led-running = &led_power;
+ led-upgrade = &led_info;
};
memory at 00000000 {
@@ -91,6 +94,75 @@
&cp0_uart0 {
status = "okay";
+
+ puzzle-mcu {
+ compatible = "iei,wt61p803-puzzle";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ current-speed = <115200>;
+ enable-beep;
+ status = "okay";
+
+ leds {
+ compatible = "iei,wt61p803-puzzle-leds";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "okay";
+
+ led at 0 {
+ reg = <0>;
+ label = "white:network";
+ active-low;
+ };
+
+ led at 1 {
+ reg = <1>;
+ label = "green:cloud";
+ active-low;
+ };
+
+ led_info: led at 2 {
+ reg = <2>;
+ label = "orange:info";
+ active-low;
+ };
+
+ led_power: led at 3 {
+ reg = <3>;
+ label = "yellow:power";
+ active-low;
+ default-state = "on";
+ };
+ };
+
+ hwmon {
+ compatible = "iei,wt61p803-puzzle-hwmon";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ chassis_fan_group0: fan-group at 0 {
+ #cooling-cells = <2>;
+ reg = <0x00>;
+ cooling-levels = <64 102 170 230 250>;
+ };
+ };
+ };
+};
+
+&ap_thermal_cpu1 {
+ trips {
+ cpu_active: cpu-active {
+ temperature = <44000>;
+ hysteresis = <2000>;
+ type = "active";
+ };
+ };
+ cooling-maps {
+ fan-map {
+ trip = <&cpu_active>;
+ cooling-device = <&chassis_fan_group0 64 THERMAL_NO_LIMIT>;
+ };
+ };
};
/* on-board eMMC - U9 */
diff --git a/target/linux/mvebu/patches-5.4/901-dt-bindings-Add-IEI-vendor-prefix-and-IEI-WT61P803-P.patch b/target/linux/mvebu/patches-5.4/901-dt-bindings-Add-IEI-vendor-prefix-and-IEI-WT61P803-P.patch
new file mode 100644
index 0000000000..fb9ea43e4b
--- /dev/null
+++ b/target/linux/mvebu/patches-5.4/901-dt-bindings-Add-IEI-vendor-prefix-and-IEI-WT61P803-P.patch
@@ -0,0 +1,218 @@
+From aa4a0ccc41997f2da172165c92803abace43bd1c Mon Sep 17 00:00:00 2001
+From: Luka Kovacic <luka.kovacic () sartura ! hr>
+Date: Tue, 24 Aug 2021 12:44:32 +0000
+Subject: [PATCH 1/7] dt-bindings: Add IEI vendor prefix and IEI WT61P803
+ PUZZLE driver bindings
+
+Add the IEI WT61P803 PUZZLE Device Tree bindings for MFD, HWMON and LED
+drivers. A new vendor prefix is also added accordingly for
+IEI Integration Corp.
+
+Signed-off-by: Luka Kovacic <luka.kovacic at sartura.hr>
+Signed-off-by: Pavo Banicevic <pavo.banicevic at sartura.hr>
+Cc: Luka Perkov <luka.perkov at sartura.hr>
+Cc: Robert Marko <robert.marko at sartura.hr>
+---
+ .../hwmon/iei,wt61p803-puzzle-hwmon.yaml | 53 ++++++++++++
+ .../leds/iei,wt61p803-puzzle-leds.yaml | 39 +++++++++
+ .../bindings/mfd/iei,wt61p803-puzzle.yaml | 82 +++++++++++++++++++
+ .../devicetree/bindings/vendor-prefixes.yaml | 2 +
+ 4 files changed, 176 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/hwmon/iei,wt61p803-puzzle-hwmon.yaml
+ create mode 100644 Documentation/devicetree/bindings/leds/iei,wt61p803-puzzle-leds.yaml
+ create mode 100644 Documentation/devicetree/bindings/mfd/iei,wt61p803-puzzle.yaml
+
+--- /dev/null
++++ b/Documentation/devicetree/bindings/hwmon/iei,wt61p803-puzzle-hwmon.yaml
+@@ -0,0 +1,53 @@
++# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
++%YAML 1.2
++---
++$id: http://devicetree.org/schemas/hwmon/iei,wt61p803-puzzle-hwmon.yaml#
++$schema: http://devicetree.org/meta-schemas/core.yaml#
++
++title: IEI WT61P803 PUZZLE MCU HWMON module from IEI Integration Corp.
++
++maintainers:
++ - Luka Kovacic <luka.kovacic at sartura.hr>
++
++description: |
++ This module is a part of the IEI WT61P803 PUZZLE MFD device. For more details
++ see Documentation/devicetree/bindings/mfd/iei,wt61p803-puzzle.yaml.
++
++ The HWMON module is a sub-node of the MCU node in the Device Tree.
++
++properties:
++ compatible:
++ const: iei,wt61p803-puzzle-hwmon
++
++ "#address-cells":
++ const: 1
++
++ "#size-cells":
++ const: 0
++
++patternProperties:
++ "^fan-group@[0-1]$":
++ type: object
++ properties:
++ reg:
++ minimum: 0
++ maximum: 1
++ description:
++ Fan group ID
++
++ cooling-levels:
++ minItems: 1
++ maxItems: 255
++ description:
++ Cooling levels for the fans (PWM value mapping)
++ description: |
++ Properties for each fan group.
++ required:
++ - reg
++
++required:
++ - compatible
++ - "#address-cells"
++ - "#size-cells"
++
++additionalProperties: false
+--- /dev/null
++++ b/Documentation/devicetree/bindings/leds/iei,wt61p803-puzzle-leds.yaml
+@@ -0,0 +1,39 @@
++# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
++%YAML 1.2
++---
++$id: http://devicetree.org/schemas/leds/iei,wt61p803-puzzle-leds.yaml#
++$schema: http://devicetree.org/meta-schemas/core.yaml#
++
++title: IEI WT61P803 PUZZLE MCU LED module from IEI Integration Corp.
++
++maintainers:
++ - Luka Kovacic <luka.kovacic at sartura.hr>
++
++description: |
++ This module is a part of the IEI WT61P803 PUZZLE MFD device. For more details
++ see Documentation/devicetree/bindings/mfd/iei,wt61p803-puzzle.yaml.
++
++ The LED module is a sub-node of the MCU node in the Device Tree.
++
++properties:
++ compatible:
++ const: iei,wt61p803-puzzle-leds
++
++ "#address-cells":
++ const: 1
++
++ "#size-cells":
++ const: 0
++
++ led at 0:
++ type: object
++ $ref: common.yaml
++ description: |
++ Properties for a single LED.
++
++required:
++ - compatible
++ - "#address-cells"
++ - "#size-cells"
++
++additionalProperties: false
+--- /dev/null
++++ b/Documentation/devicetree/bindings/mfd/iei,wt61p803-puzzle.yaml
+@@ -0,0 +1,82 @@
++# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
++%YAML 1.2
++---
++$id: http://devicetree.org/schemas/mfd/iei,wt61p803-puzzle.yaml#
++$schema: http://devicetree.org/meta-schemas/core.yaml#
++
++title: IEI WT61P803 PUZZLE MCU from IEI Integration Corp.
++
++maintainers:
++ - Luka Kovacic <luka.kovacic at sartura.hr>
++
++description: |
++ IEI WT61P803 PUZZLE MCU is embedded in some IEI Puzzle series boards.
++ It's used for controlling system power states, fans, LEDs and temperature
++ sensors.
++
++ For Device Tree bindings of other sub-modules (HWMON, LEDs) refer to the
++ binding documents under the respective subsystem directories.
++
++properties:
++ compatible:
++ const: iei,wt61p803-puzzle
++
++ current-speed:
++ description:
++ Serial bus speed in bps
++ maxItems: 1
++
++ enable-beep: true
++
++ hwmon:
++ $ref: /schemas/hwmon/iei,wt61p803-puzzle-hwmon.yaml
++
++ leds:
++ $ref: /schemas/leds/iei,wt61p803-puzzle-leds.yaml
++
++required:
++ - compatible
++ - current-speed
++
++additionalProperties: false
++
++examples:
++ - |
++ #include <dt-bindings/leds/common.h>
++ serial {
++ mcu {
++ compatible = "iei,wt61p803-puzzle";
++ current-speed = <115200>;
++ enable-beep;
++
++ leds {
++ compatible = "iei,wt61p803-puzzle-leds";
++ #address-cells = <1>;
++ #size-cells = <0>;
++
++ led at 0 {
++ reg = <0>;
++ function = LED_FUNCTION_POWER;
++ color = <LED_COLOR_ID_BLUE>;
++ };
++ };
++
++ hwmon {
++ compatible = "iei,wt61p803-puzzle-hwmon";
++ #address-cells = <1>;
++ #size-cells = <0>;
++
++ fan-group at 0 {
++ #cooling-cells = <2>;
++ reg = <0x00>;
++ cooling-levels = <64 102 170 230 250>;
++ };
++
++ fan-group at 1 {
++ #cooling-cells = <2>;
++ reg = <0x01>;
++ cooling-levels = <64 102 170 230 250>;
++ };
++ };
++ };
++ };
+--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
++++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
+@@ -423,6 +423,8 @@ patternProperties:
+ description: IC Plus Corp.
+ "^idt,.*":
+ description: Integrated Device Technologies, Inc.
++ "^iei,.*":
++ description: IEI Integration Corp.
+ "^ifi,.*":
+ description: Ingenieurburo Fur Ic-Technologie (I/F/I)
+ "^ilitek,.*":
diff --git a/target/linux/mvebu/patches-5.4/902-drivers-mfd-Add-a-driver-for-IEI-WT61P803-PUZZLE-MCU.patch b/target/linux/mvebu/patches-5.4/902-drivers-mfd-Add-a-driver-for-IEI-WT61P803-PUZZLE-MCU.patch
new file mode 100644
index 0000000000..194feee569
--- /dev/null
+++ b/target/linux/mvebu/patches-5.4/902-drivers-mfd-Add-a-driver-for-IEI-WT61P803-PUZZLE-MCU.patch
@@ -0,0 +1,1034 @@
+From 692cfa85272dd12995b427c0a7a585ced5d54f32 Mon Sep 17 00:00:00 2001
+From: Luka Kovacic <luka.kovacic () sartura ! hr>
+Date: Tue, 24 Aug 2021 12:44:33 +0000
+Subject: [PATCH 2/7] drivers: mfd: Add a driver for IEI WT61P803 PUZZLE MCU
+
+Add a driver for the IEI WT61P803 PUZZLE microcontroller, used in some
+IEI Puzzle series devices. The microcontroller controls system power,
+temperature sensors, fans and LEDs.
+
+This driver implements the core functionality for device communication
+over the system serial (serdev bus). It handles MCU messages and the
+internal MCU properties. Some properties can be managed over sysfs.
+
+Signed-off-by: Luka Kovacic <luka.kovacic at sartura.hr>
+Signed-off-by: Pavo Banicevic <pavo.banicevic at sartura.hr>
+Cc: Luka Perkov <luka.perkov at sartura.hr>
+Cc: Robert Marko <robert.marko at sartura.hr>
+---
+ drivers/mfd/Kconfig | 8 +
+ drivers/mfd/Makefile | 1 +
+ drivers/mfd/iei-wt61p803-puzzle.c | 908 ++++++++++++++++++++++++
+ include/linux/mfd/iei-wt61p803-puzzle.h | 66 ++
+ 4 files changed, 983 insertions(+)
+ create mode 100644 drivers/mfd/iei-wt61p803-puzzle.c
+ create mode 100644 include/linux/mfd/iei-wt61p803-puzzle.h
+
+--- a/drivers/mfd/Kconfig
++++ b/drivers/mfd/Kconfig
+@@ -531,6 +531,15 @@ config LPC_SCH
+ LPC bridge function of the Intel SCH provides support for
+ System Management Bus and General Purpose I/O.
+
++config MFD_IEI_WT61P803_PUZZLE
++ tristate "IEI WT61P803 PUZZLE MCU driver"
++ depends on SERIAL_DEV_BUS
++ select MFD_CORE
++ help
++ IEI WT61P803 PUZZLE is a system power management microcontroller
++ used for fan control, temperature sensor reading, LED control
++ and system identification.
++
+ config INTEL_SOC_PMIC
+ bool "Support for Crystal Cove PMIC"
+ depends on ACPI && HAS_IOMEM && I2C=y && GPIOLIB && COMMON_CLK
+--- a/drivers/mfd/Makefile
++++ b/drivers/mfd/Makefile
+@@ -232,6 +232,7 @@ obj-$(CONFIG_MFD_HI655X_PMIC) += hi655
+ obj-$(CONFIG_MFD_DLN2) += dln2.o
+ obj-$(CONFIG_MFD_RT5033) += rt5033.o
+ obj-$(CONFIG_MFD_SKY81452) += sky81452.o
++obj-$(CONFIG_MFD_IEI_WT61P803_PUZZLE) += iei-wt61p803-puzzle.o
+
+ intel-soc-pmic-objs := intel_soc_pmic_core.o intel_soc_pmic_crc.o
+ obj-$(CONFIG_INTEL_SOC_PMIC) += intel-soc-pmic.o
+--- /dev/null
++++ b/drivers/mfd/iei-wt61p803-puzzle.c
+@@ -0,0 +1,908 @@
++// SPDX-License-Identifier: GPL-2.0-only
++/* IEI WT61P803 PUZZLE MCU Driver
++ * System management microcontroller for fan control, temperature sensor reading,
++ * LED control and system identification on IEI Puzzle series ARM-based appliances.
++ *
++ * Copyright (C) 2020 Sartura Ltd.
++ * Author: Luka Kovacic <luka.kovacic at sartura.hr>
++ */
++
++#include <linux/atomic.h>
++#include <linux/delay.h>
++#include <linux/export.h>
++#include <linux/init.h>
++#include <linux/kernel.h>
++#include <linux/mfd/core.h>
++#include <linux/mfd/iei-wt61p803-puzzle.h>
++#include <linux/mod_devicetable.h>
++#include <linux/module.h>
++#include <linux/of_platform.h>
++#include <linux/property.h>
++#include <linux/sched.h>
++#include <linux/serdev.h>
++#include <linux/slab.h>
++#include <linux/sysfs.h>
++#include <asm/unaligned.h>
++
++/* start, payload and XOR checksum at end */
++#define IEI_WT61P803_PUZZLE_MAX_COMMAND_LENGTH (1 + 20 + 1)
++#define IEI_WT61P803_PUZZLE_RESP_BUF_SIZE 512
++
++#define IEI_WT61P803_PUZZLE_MAC_LENGTH 17
++#define IEI_WT61P803_PUZZLE_SN_LENGTH 36
++#define IEI_WT61P803_PUZZLE_VERSION_LENGTH 6
++#define IEI_WT61P803_PUZZLE_BUILD_INFO_LENGTH 16
++#define IEI_WT61P803_PUZZLE_PROTOCOL_VERSION_LENGTH 8
++#define IEI_WT61P803_PUZZLE_NB_MAC 8
++
++/* Use HZ as a timeout value throughout the driver */
++#define IEI_WT61P803_PUZZLE_GENERAL_TIMEOUT HZ
++
++enum iei_wt61p803_puzzle_attribute_type {
++ IEI_WT61P803_PUZZLE_VERSION,
++ IEI_WT61P803_PUZZLE_BUILD_INFO,
++ IEI_WT61P803_PUZZLE_BOOTLOADER_MODE,
++ IEI_WT61P803_PUZZLE_PROTOCOL_VERSION,
++ IEI_WT61P803_PUZZLE_SERIAL_NUMBER,
++ IEI_WT61P803_PUZZLE_MAC_ADDRESS,
++ IEI_WT61P803_PUZZLE_AC_RECOVERY_STATUS,
++ IEI_WT61P803_PUZZLE_POWER_LOSS_RECOVERY,
++ IEI_WT61P803_PUZZLE_POWER_STATUS,
++};
++
++struct iei_wt61p803_puzzle_device_attribute {
++ struct device_attribute dev_attr;
++ enum iei_wt61p803_puzzle_attribute_type type;
++ u8 index;
++};
++
++/**
++ * struct iei_wt61p803_puzzle_mcu_status - MCU flags state
++ * @ac_recovery_status_flag: AC Recovery Status Flag
++ * @power_loss_recovery: System recovery after power loss
++ * @power_status: System Power-on Method
++ */
++struct iei_wt61p803_puzzle_mcu_status {
++ u8 ac_recovery_status_flag;
++ u8 power_loss_recovery;
++ u8 power_status;
++};
++
++/**
++ * struct iei_wt61p803_puzzle_reply - MCU reply
++ * @size: Size of the MCU reply
++ * @data: Full MCU reply buffer
++ * @state: Current state of the packet
++ * @received: Was the response fullfilled
++ */
++struct iei_wt61p803_puzzle_reply {
++ size_t size;
++ unsigned char data[IEI_WT61P803_PUZZLE_RESP_BUF_SIZE];
++ struct completion received;
++};
++
++/**
++ * struct iei_wt61p803_puzzle_mcu_version - MCU version status
++ * @version: Primary firmware version
++ * @build_info: Build date and time
++ * @bootloader_mode: Status of the MCU operation
++ * @protocol_version: MCU communication protocol version
++ * @serial_number: Device factory serial number
++ * @mac_address: Device factory MAC addresses
++ *
++ * Last element of arrays is reserved for '\0'.
++ */
++struct iei_wt61p803_puzzle_mcu_version {
++ char version[IEI_WT61P803_PUZZLE_VERSION_LENGTH + 1];
++ char build_info[IEI_WT61P803_PUZZLE_BUILD_INFO_LENGTH + 1];
++ bool bootloader_mode;
++ char protocol_version[IEI_WT61P803_PUZZLE_PROTOCOL_VERSION_LENGTH + 1];
++ char serial_number[IEI_WT61P803_PUZZLE_SN_LENGTH + 1];
++ char mac_address[IEI_WT61P803_PUZZLE_NB_MAC][IEI_WT61P803_PUZZLE_MAC_LENGTH + 1];
++};
++
++/**
++ * struct iei_wt61p803_puzzle - IEI WT61P803 PUZZLE MCU Driver
++ * @serdev: Pointer to underlying serdev device
++ * @dev: Pointer to underlying dev device
++ * @reply_lock: Reply mutex lock
++ * @reply: Pointer to the iei_wt61p803_puzzle_reply struct
++ * @version: MCU version related data
++ * @status: MCU status related data
++ * @response_buffer Command response buffer allocation
++ * @lock General member mutex lock
++ */
++struct iei_wt61p803_puzzle {
++ struct serdev_device *serdev;
++ struct device *dev;
++ struct mutex reply_lock; /* lock to prevent multiple firmware calls */
++ struct iei_wt61p803_puzzle_reply *reply;
++ struct iei_wt61p803_puzzle_mcu_version version;
++ struct iei_wt61p803_puzzle_mcu_status status;
++ unsigned char response_buffer[IEI_WT61P803_PUZZLE_BUF_SIZE];
++ struct mutex lock; /* lock to protect response buffer */
++};
++
++static unsigned char iei_wt61p803_puzzle_checksum(unsigned char *buf, size_t len)
++{
++ unsigned char checksum = 0;
++ size_t i;
++
++ for (i = 0; i < len; i++)
++ checksum ^= buf[i];
++ return checksum;
++}
++
++static int iei_wt61p803_puzzle_process_resp(struct iei_wt61p803_puzzle *mcu,
++ const unsigned char *raw_resp_data, size_t size)
++{
++ unsigned char checksum;
++
++ /* Check the incoming frame header */
++ if (!(raw_resp_data[0] == IEI_WT61P803_PUZZLE_CMD_HEADER_START ||
++ raw_resp_data[0] == IEI_WT61P803_PUZZLE_CMD_HEADER_START_OTHER ||
++ (raw_resp_data[0] == IEI_WT61P803_PUZZLE_CMD_HEADER_EEPROM &&
++ raw_resp_data[1] == IEI_WT61P803_PUZZLE_CMD_EEPROM_READ))) {
++ if (mcu->reply->size + size >= sizeof(mcu->reply->data))
++ return -EIO;
++
++ /* Append the frame to existing data */
++ memcpy(mcu->reply->data + mcu->reply->size, raw_resp_data, size);
++ mcu->reply->size += size;
++ } else {
++ if (size >= sizeof(mcu->reply->data))
++ return -EIO;
++
++ /* Start processing a new frame */
++ memcpy(mcu->reply->data, raw_resp_data, size);
++ mcu->reply->size = size;
++ }
++
++ checksum = iei_wt61p803_puzzle_checksum(mcu->reply->data, mcu->reply->size - 1);
++ if (checksum != mcu->reply->data[mcu->reply->size - 1]) {
++ /* The checksum isn't matched yet, wait for new frames */
++ return size;
++ }
++
++ /* Received all the data */
++ complete(&mcu->reply->received);
++
++ return size;
++}
++
++static int iei_wt61p803_puzzle_recv_buf(struct serdev_device *serdev,
++ const unsigned char *data, size_t size)
++{
++ struct iei_wt61p803_puzzle *mcu = serdev_device_get_drvdata(serdev);
++ int ret;
++
++ ret = iei_wt61p803_puzzle_process_resp(mcu, data, size);
++ /* Return the number of processed bytes if function returns error,
++ * discard the remaining incoming data, since the frame this data
++ * belongs to is broken anyway
++ */
++ if (ret < 0)
++ return size;
++
++ return ret;
++}
++
++static const struct serdev_device_ops iei_wt61p803_puzzle_serdev_device_ops = {
++ .receive_buf = iei_wt61p803_puzzle_recv_buf,
++ .write_wakeup = serdev_device_write_wakeup,
++};
++
++/**
++ * iei_wt61p803_puzzle_write_command_watchdog() - Watchdog of the normal cmd
++ * @mcu: Pointer to the iei_wt61p803_puzzle core MFD struct
++ * @cmd: Pointer to the char array to send (size should be content + 1 (xor))
++ * @size: Size of the cmd char array
++ * @reply_data: Pointer to the reply/response data array (should be allocated)
++ * @reply_size: Pointer to size_t (size of reply_data)
++ * @retry_count: Number of times to retry sending the command to the MCU
++ */
++int iei_wt61p803_puzzle_write_command_watchdog(struct iei_wt61p803_puzzle *mcu,
++ unsigned char *cmd, size_t size,
++ unsigned char *reply_data,
++ size_t *reply_size, int retry_count)
++{
++ struct device *dev = &mcu->serdev->dev;
++ int ret, i;
++
++ for (i = 0; i < retry_count; i++) {
++ ret = iei_wt61p803_puzzle_write_command(mcu, cmd, size,
++ reply_data, reply_size);
++ if (ret != -ETIMEDOUT)
++ return ret;
++ }
++
++ dev_err(dev, "Command response timed out. Retries: %d\n", retry_count);
++
++ return -ETIMEDOUT;
++}
++EXPORT_SYMBOL_GPL(iei_wt61p803_puzzle_write_command_watchdog);
++
++/**
++ * iei_wt61p803_puzzle_write_command() - Send a structured command to the MCU
++ * @mcu: Pointer to the iei_wt61p803_puzzle core MFD struct
++ * @cmd: Pointer to the char array to send (size should be content + 1 (xor))
++ * @size: Size of the cmd char array
++ * @reply_data: Pointer to the reply/response data array (should be allocated)
++ *
++ * Sends a structured command to the MCU.
++ */
++int iei_wt61p803_puzzle_write_command(struct iei_wt61p803_puzzle *mcu,
++ unsigned char *cmd, size_t size,
++ unsigned char *reply_data,
++ size_t *reply_size)
++{
++ struct device *dev = &mcu->serdev->dev;
++ int ret;
++
++ if (size <= 1 || size > IEI_WT61P803_PUZZLE_MAX_COMMAND_LENGTH)
++ return -EINVAL;
++
++ mutex_lock(&mcu->reply_lock);
++
++ cmd[size - 1] = iei_wt61p803_puzzle_checksum(cmd, size - 1);
++
++ /* Initialize reply struct */
++ reinit_completion(&mcu->reply->received);
++ mcu->reply->size = 0;
++ usleep_range(2000, 10000);
++ serdev_device_write_flush(mcu->serdev);
++ ret = serdev_device_write_buf(mcu->serdev, cmd, size);
++ if (ret < 0)
++ goto exit;
++
++ serdev_device_wait_until_sent(mcu->serdev, IEI_WT61P803_PUZZLE_GENERAL_TIMEOUT);
++ ret = wait_for_completion_timeout(&mcu->reply->received,
++ IEI_WT61P803_PUZZLE_GENERAL_TIMEOUT);
++ if (ret == 0) {
++ dev_err(dev, "Command reply receive timeout\n");
++ ret = -ETIMEDOUT;
++ goto exit;
++ }
++
++ *reply_size = mcu->reply->size;
++ /* Copy the received data, as it will not be available after a new frame is received */
++ memcpy(reply_data, mcu->reply->data, mcu->reply->size);
++ ret = 0;
++exit:
++ mutex_unlock(&mcu->reply_lock);
++ return ret;
++}
++EXPORT_SYMBOL_GPL(iei_wt61p803_puzzle_write_command);
++
++static int iei_wt61p803_puzzle_buzzer(struct iei_wt61p803_puzzle *mcu, bool long_beep)
++{
++ unsigned char *resp_buf = mcu->response_buffer;
++ unsigned char buzzer_cmd[4] = {};
++ size_t reply_size;
++ int ret;
++
++ buzzer_cmd[0] = IEI_WT61P803_PUZZLE_CMD_HEADER_START;
++ buzzer_cmd[1] = IEI_WT61P803_PUZZLE_CMD_FUNCTION_SINGLE;
++ buzzer_cmd[2] = long_beep ? '3' : '2'; /* Buzzer 1.5 / 0.5 second beep */
++
++ mutex_lock(&mcu->lock);
++ ret = iei_wt61p803_puzzle_write_command(mcu, buzzer_cmd, sizeof(buzzer_cmd),
++ resp_buf, &reply_size);
++ if (ret)
++ goto exit;
++
++ if (reply_size != 3) {
++ ret = -EIO;
++ goto exit;
++ }
++
++ if (!(resp_buf[0] == IEI_WT61P803_PUZZLE_CMD_HEADER_START &&
++ resp_buf[1] == IEI_WT61P803_PUZZLE_CMD_RESPONSE_OK &&
++ resp_buf[2] == IEI_WT61P803_PUZZLE_CHECKSUM_RESPONSE_OK)) {
++ ret = -EPROTO;
++ goto exit;
++ }
++exit:
++ mutex_unlock(&mcu->lock);
++ return ret;
++}
++
++static int iei_wt61p803_puzzle_get_version(struct iei_wt61p803_puzzle *mcu)
++{
++ unsigned char version_cmd[3] = {
++ IEI_WT61P803_PUZZLE_CMD_HEADER_START_OTHER,
++ IEI_WT61P803_PUZZLE_CMD_OTHER_VERSION,
++ };
++ unsigned char build_info_cmd[3] = {
++ IEI_WT61P803_PUZZLE_CMD_HEADER_START_OTHER,
++ IEI_WT61P803_PUZZLE_CMD_OTHER_BUILD,
++ };
++ unsigned char bootloader_mode_cmd[3] = {
++ IEI_WT61P803_PUZZLE_CMD_HEADER_START_OTHER,
++ IEI_WT61P803_PUZZLE_CMD_OTHER_BOOTLOADER_MODE,
++ };
++ unsigned char protocol_version_cmd[3] = {
++ IEI_WT61P803_PUZZLE_CMD_HEADER_START_OTHER,
++ IEI_WT61P803_PUZZLE_CMD_OTHER_PROTOCOL_VERSION,
++ };
++ unsigned char *rb = mcu->response_buffer;
++ size_t reply_size;
++ int ret;
++
++ mutex_lock(&mcu->lock);
++
++ ret = iei_wt61p803_puzzle_write_command(mcu, version_cmd, sizeof(version_cmd),
++ rb, &reply_size);
++ if (ret)
++ goto err;
++ if (reply_size < 7) {
++ ret = -EIO;
++ goto err;
++ }
++ sprintf(mcu->version.version, "v%c.%.3s", rb[2], &rb[3]);
++
++ ret = iei_wt61p803_puzzle_write_command(mcu, build_info_cmd,
++ sizeof(build_info_cmd), rb,
++ &reply_size);
++ if (ret)
++ goto err;
++ if (reply_size < 15) {
++ ret = -EIO;
++ goto err;
++ }
++ sprintf(mcu->version.build_info, "%c%c/%c%c/%.4s %c%c:%c%c",
++ rb[8], rb[9], rb[6], rb[7], &rb[2], rb[10], rb[11],
++ rb[12], rb[13]);
++
++ ret = iei_wt61p803_puzzle_write_command(mcu, bootloader_mode_cmd,
++ sizeof(bootloader_mode_cmd), rb,
++ &reply_size);
++ if (ret)
++ goto err;
++ if (reply_size < 4) {
++ ret = -EIO;
++ goto err;
++ }
++ if (rb[2] == IEI_WT61P803_PUZZLE_CMD_OTHER_MODE_APPS)
++ mcu->version.bootloader_mode = false;
++ else if (rb[2] == IEI_WT61P803_PUZZLE_CMD_OTHER_MODE_BOOTLOADER)
++ mcu->version.bootloader_mode = true;
++
++ ret = iei_wt61p803_puzzle_write_command(mcu, protocol_version_cmd,
++ sizeof(protocol_version_cmd), rb,
++ &reply_size);
++ if (ret)
++ goto err;
++ if (reply_size < 9) {
++ ret = -EIO;
++ goto err;
++ }
++ sprintf(mcu->version.protocol_version, "v%c.%c%c%c%c%c",
++ rb[7], rb[6], rb[5], rb[4], rb[3], rb[2]);
++err:
++ mutex_unlock(&mcu->lock);
++ return ret;
++}
++
++static int iei_wt61p803_puzzle_get_mcu_status(struct iei_wt61p803_puzzle *mcu)
++{
++ unsigned char mcu_status_cmd[5] = {
++ IEI_WT61P803_PUZZLE_CMD_HEADER_START,
++ IEI_WT61P803_PUZZLE_CMD_FUNCTION_OTHER,
++ IEI_WT61P803_PUZZLE_CMD_FUNCTION_OTHER_STATUS,
++ IEI_WT61P803_PUZZLE_CMD_FUNCTION_OTHER_STATUS,
++ };
++ unsigned char *resp_buf = mcu->response_buffer;
++ size_t reply_size;
++ int ret;
++
++ mutex_lock(&mcu->lock);
++ ret = iei_wt61p803_puzzle_write_command(mcu, mcu_status_cmd, sizeof(mcu_status_cmd),
++ resp_buf, &reply_size);
++ if (ret)
++ goto exit;
++ if (reply_size < 20) {
++ ret = -EIO;
++ goto exit;
++ }
++
++ /* Response format:
++ * (IDX RESPONSE)
++ * 0 @
++ * 1 O
++ * 2 S
++ * 3 S
++ * ...
++ * 5 AC Recovery Status Flag
++ * ...
++ * 10 Power Loss Recovery
++ * ...
++ * 19 Power Status (system power on method)
++ * 20 XOR checksum
++ */
++ if (resp_buf[0] == IEI_WT61P803_PUZZLE_CMD_HEADER_START &&
++ resp_buf[1] == IEI_WT61P803_PUZZLE_CMD_FUNCTION_OTHER &&
++ resp_buf[2] == IEI_WT61P803_PUZZLE_CMD_FUNCTION_OTHER_STATUS &&
++ resp_buf[3] == IEI_WT61P803_PUZZLE_CMD_FUNCTION_OTHER_STATUS) {
++ mcu->status.ac_recovery_status_flag = resp_buf[5];
++ mcu->status.power_loss_recovery = resp_buf[10];
++ mcu->status.power_status = resp_buf[19];
++ }
++exit:
++ mutex_unlock(&mcu->lock);
++ return ret;
++}
++
++static int iei_wt61p803_puzzle_get_serial_number(struct iei_wt61p803_puzzle *mcu)
++{
++ unsigned char *resp_buf = mcu->response_buffer;
++ unsigned char serial_number_cmd[5] = {
++ IEI_WT61P803_PUZZLE_CMD_HEADER_EEPROM,
++ IEI_WT61P803_PUZZLE_CMD_EEPROM_READ,
++ 0x00, /* EEPROM read address */
++ 0x24, /* Data length */
++ };
++ size_t reply_size;
++ int ret;
++
++ mutex_lock(&mcu->lock);
++ ret = iei_wt61p803_puzzle_write_command(mcu, serial_number_cmd,
++ sizeof(serial_number_cmd),
++ resp_buf, &reply_size);
++ if (ret)
++ goto err;
++
++ if (reply_size < IEI_WT61P803_PUZZLE_SN_LENGTH + 4) {
++ ret = -EIO;
++ goto err;
++ }
++
++ sprintf(mcu->version.serial_number, "%.*s",
++ IEI_WT61P803_PUZZLE_SN_LENGTH, resp_buf + 4);
++err:
++ mutex_unlock(&mcu->lock);
++ return ret;
++}
++
++static int iei_wt61p803_puzzle_write_serial_number(struct iei_wt61p803_puzzle *mcu,
++ unsigned char serial_number[36])
++{
++ unsigned char *resp_buf = mcu->response_buffer;
++ unsigned char serial_number_header[4] = {
++ IEI_WT61P803_PUZZLE_CMD_HEADER_EEPROM,
++ IEI_WT61P803_PUZZLE_CMD_EEPROM_WRITE,
++ 0x00, /* EEPROM write address */
++ 0xC, /* Data length */
++ };
++ unsigned char serial_number_cmd[4 + 12 + 1]; /* header, serial number, XOR checksum */
++ int ret, sn_counter;
++ size_t reply_size;
++
++ /* The MCU can only handle 22 byte messages, send the S/N in 12 byte chunks */
++ mutex_lock(&mcu->lock);
++ for (sn_counter = 0; sn_counter < 3; sn_counter++) {
++ serial_number_header[2] = 0x0 + 0xC * sn_counter;
++
++ memcpy(serial_number_cmd, serial_number_header, sizeof(serial_number_header));
++ memcpy(serial_number_cmd + sizeof(serial_number_header),
++ serial_number + 0xC * sn_counter, 0xC);
++
++ ret = iei_wt61p803_puzzle_write_command(mcu, serial_number_cmd,
++ sizeof(serial_number_cmd),
++ resp_buf, &reply_size);
++ if (ret)
++ goto err;
++ if (reply_size != 3) {
++ ret = -EIO;
++ goto err;
++ }
++ if (!(resp_buf[0] == IEI_WT61P803_PUZZLE_CMD_HEADER_START &&
++ resp_buf[1] == IEI_WT61P803_PUZZLE_CMD_RESPONSE_OK &&
++ resp_buf[2] == IEI_WT61P803_PUZZLE_CHECKSUM_RESPONSE_OK)) {
++ ret = -EPROTO;
++ goto err;
++ }
++ }
++
++ sprintf(mcu->version.serial_number, "%.*s",
++ IEI_WT61P803_PUZZLE_SN_LENGTH, serial_number);
++err:
++ mutex_unlock(&mcu->lock);
++ return ret;
++}
++
++static int iei_wt61p803_puzzle_get_mac_address(struct iei_wt61p803_puzzle *mcu, int index)
++{
++ unsigned char *resp_buf = mcu->response_buffer;
++ unsigned char mac_address_cmd[5] = {
++ IEI_WT61P803_PUZZLE_CMD_HEADER_EEPROM,
++ IEI_WT61P803_PUZZLE_CMD_EEPROM_READ,
++ 0x00, /* EEPROM read address */
++ 0x11, /* Data length */
++ };
++ size_t reply_size;
++ int ret;
++
++ mutex_lock(&mcu->lock);
++ mac_address_cmd[2] = 0x24 + 0x11 * index;
++
++ ret = iei_wt61p803_puzzle_write_command(mcu, mac_address_cmd,
++ sizeof(mac_address_cmd),
++ resp_buf, &reply_size);
++ if (ret)
++ goto err;
++
++ if (reply_size < 22) {
++ ret = -EIO;
++ goto err;
++ }
++
++ sprintf(mcu->version.mac_address[index], "%.*s",
++ IEI_WT61P803_PUZZLE_MAC_LENGTH, resp_buf + 4);
++err:
++ mutex_unlock(&mcu->lock);
++ return ret;
++}
++
++static int
++iei_wt61p803_puzzle_write_mac_address(struct iei_wt61p803_puzzle *mcu,
++ unsigned char mac_address[IEI_WT61P803_PUZZLE_MAC_LENGTH],
++ int mac_address_idx)
++{
++ unsigned char mac_address_cmd[4 + IEI_WT61P803_PUZZLE_MAC_LENGTH + 1];
++ unsigned char *resp_buf = mcu->response_buffer;
++ unsigned char mac_address_header[4] = {
++ IEI_WT61P803_PUZZLE_CMD_HEADER_EEPROM,
++ IEI_WT61P803_PUZZLE_CMD_EEPROM_WRITE,
++ 0x00, /* EEPROM write address */
++ 0x11, /* Data length */
++ };
++ size_t reply_size;
++ int ret;
++
++ if (mac_address_idx < 0 || mac_address_idx >= IEI_WT61P803_PUZZLE_NB_MAC)
++ return -EINVAL;
++
++ mac_address_header[2] = 0x24 + 0x11 * mac_address_idx;
++
++ /* Concat mac_address_header, mac_address to mac_address_cmd */
++ memcpy(mac_address_cmd, mac_address_header, sizeof(mac_address_header));
++ memcpy(mac_address_cmd + sizeof(mac_address_header), mac_address,
++ IEI_WT61P803_PUZZLE_MAC_LENGTH);
++
++ mutex_lock(&mcu->lock);
++ ret = iei_wt61p803_puzzle_write_command(mcu, mac_address_cmd,
++ sizeof(mac_address_cmd),
++ resp_buf, &reply_size);
++ if (ret)
++ goto err;
++ if (reply_size != 3) {
++ ret = -EIO;
++ goto err;
++ }
++ if (!(resp_buf[0] == IEI_WT61P803_PUZZLE_CMD_HEADER_START &&
++ resp_buf[1] == IEI_WT61P803_PUZZLE_CMD_RESPONSE_OK &&
++ resp_buf[2] == IEI_WT61P803_PUZZLE_CHECKSUM_RESPONSE_OK)) {
++ ret = -EPROTO;
++ goto err;
++ }
++
++ sprintf(mcu->version.mac_address[mac_address_idx], "%.*s",
++ IEI_WT61P803_PUZZLE_MAC_LENGTH, mac_address);
++err:
++ mutex_unlock(&mcu->lock);
++ return ret;
++}
++
++static int iei_wt61p803_puzzle_write_power_loss_recovery(struct iei_wt61p803_puzzle *mcu,
++ int power_loss_recovery_action)
++{
++ unsigned char *resp_buf = mcu->response_buffer;
++ unsigned char power_loss_recovery_cmd[5] = {};
++ size_t reply_size;
++ int ret;
++
++ if (power_loss_recovery_action < 0 || power_loss_recovery_action > 4)
++ return -EINVAL;
++
++ power_loss_recovery_cmd[0] = IEI_WT61P803_PUZZLE_CMD_HEADER_START;
++ power_loss_recovery_cmd[1] = IEI_WT61P803_PUZZLE_CMD_FUNCTION_OTHER;
++ power_loss_recovery_cmd[2] = IEI_WT61P803_PUZZLE_CMD_FUNCTION_OTHER_POWER_LOSS;
++ power_loss_recovery_cmd[3] = hex_asc[power_loss_recovery_action];
++
++ mutex_lock(&mcu->lock);
++ ret = iei_wt61p803_puzzle_write_command(mcu, power_loss_recovery_cmd,
++ sizeof(power_loss_recovery_cmd),
++ resp_buf, &reply_size);
++ if (ret)
++ goto exit;
++ mcu->status.power_loss_recovery = power_loss_recovery_action;
++exit:
++ mutex_unlock(&mcu->lock);
++ return ret;
++}
++
++#define to_puzzle_dev_attr(_attr) \
++ container_of(_attr, struct iei_wt61p803_puzzle_device_attribute, dev_attr)
++
++static ssize_t show_output(struct device *dev,
++ struct device_attribute *attr, char *buf)
++{
++ struct iei_wt61p803_puzzle *mcu = dev_get_drvdata(dev);
++ struct iei_wt61p803_puzzle_device_attribute *pattr = to_puzzle_dev_attr(attr);
++ int ret;
++
++ switch (pattr->type) {
++ case IEI_WT61P803_PUZZLE_VERSION:
++ return scnprintf(buf, PAGE_SIZE, "%s\n", mcu->version.version);
++ case IEI_WT61P803_PUZZLE_BUILD_INFO:
++ return scnprintf(buf, PAGE_SIZE, "%s\n", mcu->version.build_info);
++ case IEI_WT61P803_PUZZLE_BOOTLOADER_MODE:
++ return scnprintf(buf, PAGE_SIZE, "%d\n", mcu->version.bootloader_mode);
++ case IEI_WT61P803_PUZZLE_PROTOCOL_VERSION:
++ return scnprintf(buf, PAGE_SIZE, "%s\n", mcu->version.protocol_version);
++ case IEI_WT61P803_PUZZLE_SERIAL_NUMBER:
++ ret = iei_wt61p803_puzzle_get_serial_number(mcu);
++ if (!ret)
++ ret = scnprintf(buf, PAGE_SIZE, "%s\n", mcu->version.serial_number);
++ else
++ ret = 0;
++ return ret;
++ case IEI_WT61P803_PUZZLE_MAC_ADDRESS:
++ ret = iei_wt61p803_puzzle_get_mac_address(mcu, pattr->index);
++ if (!ret)
++ ret = scnprintf(buf, PAGE_SIZE, "%s\n",
++ mcu->version.mac_address[pattr->index]);
++ else
++ ret = 0;
++ return ret;
++ case IEI_WT61P803_PUZZLE_AC_RECOVERY_STATUS:
++ case IEI_WT61P803_PUZZLE_POWER_LOSS_RECOVERY:
++ case IEI_WT61P803_PUZZLE_POWER_STATUS:
++ ret = iei_wt61p803_puzzle_get_mcu_status(mcu);
++ if (ret)
++ return ret;
++
++ mutex_lock(&mcu->lock);
++ switch (pattr->type) {
++ case IEI_WT61P803_PUZZLE_AC_RECOVERY_STATUS:
++ ret = scnprintf(buf, PAGE_SIZE, "%x\n",
++ mcu->status.ac_recovery_status_flag);
++ break;
++ case IEI_WT61P803_PUZZLE_POWER_LOSS_RECOVERY:
++ ret = scnprintf(buf, PAGE_SIZE, "%x\n", mcu->status.power_loss_recovery);
++ break;
++ case IEI_WT61P803_PUZZLE_POWER_STATUS:
++ ret = scnprintf(buf, PAGE_SIZE, "%x\n", mcu->status.power_status);
++ break;
++ default:
++ ret = 0;
++ break;
++ }
++ mutex_unlock(&mcu->lock);
++ return ret;
++ default:
++ return 0;
++ }
++
++ return 0;
++}
++
++static ssize_t store_output(struct device *dev,
++ struct device_attribute *attr,
++ const char *buf, size_t len)
++{
++ unsigned char serial_number[IEI_WT61P803_PUZZLE_SN_LENGTH];
++ unsigned char mac_address[IEI_WT61P803_PUZZLE_MAC_LENGTH];
++ struct iei_wt61p803_puzzle *mcu = dev_get_drvdata(dev);
++ struct iei_wt61p803_puzzle_device_attribute *pattr = to_puzzle_dev_attr(attr);
++ int power_loss_recovery_action = 0;
++ int ret;
++
++ switch (pattr->type) {
++ case IEI_WT61P803_PUZZLE_SERIAL_NUMBER:
++ if (len != (size_t)(IEI_WT61P803_PUZZLE_SN_LENGTH + 1))
++ return -EINVAL;
++ memcpy(serial_number, buf, sizeof(serial_number));
++ ret = iei_wt61p803_puzzle_write_serial_number(mcu, serial_number);
++ if (ret)
++ return ret;
++ return len;
++ case IEI_WT61P803_PUZZLE_MAC_ADDRESS:
++ if (len != (size_t)(IEI_WT61P803_PUZZLE_MAC_LENGTH + 1))
++ return -EINVAL;
++
++ memcpy(mac_address, buf, sizeof(mac_address));
++
++ if (strlen(attr->attr.name) != 13)
++ return -EIO;
++
++ ret = iei_wt61p803_puzzle_write_mac_address(mcu, mac_address, pattr->index);
++ if (ret)
++ return ret;
++ return len;
++ case IEI_WT61P803_PUZZLE_POWER_LOSS_RECOVERY:
++ ret = kstrtoint(buf, 10, &power_loss_recovery_action);
++ if (ret)
++ return ret;
++ ret = iei_wt61p803_puzzle_write_power_loss_recovery(mcu,
++ power_loss_recovery_action);
++ if (ret)
++ return ret;
++ return len;
++ default:
++ return -EINVAL;
++ }
++
++ return 0;
++}
++
++#define IEI_WT61P803_PUZZLE_ATTR(_name, _mode, _show, _store, _type, _index) \
++ struct iei_wt61p803_puzzle_device_attribute dev_attr_##_name = \
++ { .dev_attr = __ATTR(_name, _mode, _show, _store), \
++ .type = _type, \
++ .index = _index }
++
++#define IEI_WT61P803_PUZZLE_ATTR_RO(_name, _type, _id) \
++ IEI_WT61P803_PUZZLE_ATTR(_name, 0444, show_output, NULL, _type, _id)
++
++#define IEI_WT61P803_PUZZLE_ATTR_RW(_name, _type, _id) \
++ IEI_WT61P803_PUZZLE_ATTR(_name, 0644, show_output, store_output, _type, _id)
++
++static IEI_WT61P803_PUZZLE_ATTR_RO(version, IEI_WT61P803_PUZZLE_VERSION, 0);
++static IEI_WT61P803_PUZZLE_ATTR_RO(build_info, IEI_WT61P803_PUZZLE_BUILD_INFO, 0);
++static IEI_WT61P803_PUZZLE_ATTR_RO(bootloader_mode, IEI_WT61P803_PUZZLE_BOOTLOADER_MODE, 0);
++static IEI_WT61P803_PUZZLE_ATTR_RO(protocol_version, IEI_WT61P803_PUZZLE_PROTOCOL_VERSION, 0);
++static IEI_WT61P803_PUZZLE_ATTR_RW(serial_number, IEI_WT61P803_PUZZLE_SERIAL_NUMBER, 0);
++static IEI_WT61P803_PUZZLE_ATTR_RW(mac_address_0, IEI_WT61P803_PUZZLE_MAC_ADDRESS, 0);
++static IEI_WT61P803_PUZZLE_ATTR_RW(mac_address_1, IEI_WT61P803_PUZZLE_MAC_ADDRESS, 1);
++static IEI_WT61P803_PUZZLE_ATTR_RW(mac_address_2, IEI_WT61P803_PUZZLE_MAC_ADDRESS, 2);
++static IEI_WT61P803_PUZZLE_ATTR_RW(mac_address_3, IEI_WT61P803_PUZZLE_MAC_ADDRESS, 3);
++static IEI_WT61P803_PUZZLE_ATTR_RW(mac_address_4, IEI_WT61P803_PUZZLE_MAC_ADDRESS, 4);
++static IEI_WT61P803_PUZZLE_ATTR_RW(mac_address_5, IEI_WT61P803_PUZZLE_MAC_ADDRESS, 5);
++static IEI_WT61P803_PUZZLE_ATTR_RW(mac_address_6, IEI_WT61P803_PUZZLE_MAC_ADDRESS, 6);
++static IEI_WT61P803_PUZZLE_ATTR_RW(mac_address_7, IEI_WT61P803_PUZZLE_MAC_ADDRESS, 7);
++static IEI_WT61P803_PUZZLE_ATTR_RO(ac_recovery_status, IEI_WT61P803_PUZZLE_AC_RECOVERY_STATUS, 0);
++static IEI_WT61P803_PUZZLE_ATTR_RW(power_loss_recovery, IEI_WT61P803_PUZZLE_POWER_LOSS_RECOVERY, 0);
++static IEI_WT61P803_PUZZLE_ATTR_RO(power_status, IEI_WT61P803_PUZZLE_POWER_STATUS, 0);
++
++static struct attribute *iei_wt61p803_puzzle_attrs[] = {
++ &dev_attr_version.dev_attr.attr,
++ &dev_attr_build_info.dev_attr.attr,
++ &dev_attr_bootloader_mode.dev_attr.attr,
++ &dev_attr_protocol_version.dev_attr.attr,
++ &dev_attr_serial_number.dev_attr.attr,
++ &dev_attr_mac_address_0.dev_attr.attr,
++ &dev_attr_mac_address_1.dev_attr.attr,
++ &dev_attr_mac_address_2.dev_attr.attr,
++ &dev_attr_mac_address_3.dev_attr.attr,
++ &dev_attr_mac_address_4.dev_attr.attr,
++ &dev_attr_mac_address_5.dev_attr.attr,
++ &dev_attr_mac_address_6.dev_attr.attr,
++ &dev_attr_mac_address_7.dev_attr.attr,
++ &dev_attr_ac_recovery_status.dev_attr.attr,
++ &dev_attr_power_loss_recovery.dev_attr.attr,
++ &dev_attr_power_status.dev_attr.attr,
++ NULL
++};
++ATTRIBUTE_GROUPS(iei_wt61p803_puzzle);
++
++static int iei_wt61p803_puzzle_sysfs_create(struct device *dev,
++ struct iei_wt61p803_puzzle *mcu)
++{
++ int ret;
++
++ ret = sysfs_create_groups(&mcu->dev->kobj, iei_wt61p803_puzzle_groups);
++ if (ret)
++ mfd_remove_devices(mcu->dev);
++
++ return ret;
++}
++
++static int iei_wt61p803_puzzle_sysfs_remove(struct device *dev,
++ struct iei_wt61p803_puzzle *mcu)
++{
++ /* Remove sysfs groups */
++ sysfs_remove_groups(&mcu->dev->kobj, iei_wt61p803_puzzle_groups);
++ mfd_remove_devices(mcu->dev);
++
++ return 0;
++}
++
++static int iei_wt61p803_puzzle_probe(struct serdev_device *serdev)
++{
++ struct device *dev = &serdev->dev;
++ struct iei_wt61p803_puzzle *mcu;
++ u32 baud;
++ int ret;
++
++ /* Read the baud rate from 'current-speed', because the MCU supports different rates */
++ if (device_property_read_u32(dev, "current-speed", &baud)) {
++ dev_err(dev,
++ "'current-speed' is not specified in device node\n");
++ return -EINVAL;
++ }
++ dev_dbg(dev, "Driver baud rate: %d\n", baud);
++
++ /* Allocate the memory */
++ mcu = devm_kzalloc(dev, sizeof(*mcu), GFP_KERNEL);
++ if (!mcu)
++ return -ENOMEM;
++
++ mcu->reply = devm_kzalloc(dev, sizeof(*mcu->reply), GFP_KERNEL);
++ if (!mcu->reply)
++ return -ENOMEM;
++
++ /* Initialize device struct data */
++ mcu->serdev = serdev;
++ mcu->dev = dev;
++ init_completion(&mcu->reply->received);
++ mutex_init(&mcu->reply_lock);
++ mutex_init(&mcu->lock);
++
++ /* Setup UART interface */
++ serdev_device_set_drvdata(serdev, mcu);
++ serdev_device_set_client_ops(serdev, &iei_wt61p803_puzzle_serdev_device_ops);
++ ret = devm_serdev_device_open(dev, serdev);
++ if (ret)
++ return ret;
++ serdev_device_set_baudrate(serdev, baud);
++ serdev_device_set_flow_control(serdev, false);
++ ret = serdev_device_set_parity(serdev, SERDEV_PARITY_NONE);
++ if (ret) {
++ dev_err(dev, "Failed to set parity\n");
++ return ret;
++ }
++
++ ret = iei_wt61p803_puzzle_get_version(mcu);
++ if (ret)
++ return ret;
++
++ dev_dbg(dev, "MCU version: %s\n", mcu->version.version);
++ dev_dbg(dev, "MCU firmware build info: %s\n", mcu->version.build_info);
++ dev_dbg(dev, "MCU in bootloader mode: %s\n",
++ mcu->version.bootloader_mode ? "true" : "false");
++ dev_dbg(dev, "MCU protocol version: %s\n", mcu->version.protocol_version);
++
++ if (device_property_read_bool(dev, "enable-beep")) {
++ ret = iei_wt61p803_puzzle_buzzer(mcu, false);
++ if (ret)
++ return ret;
++ }
++
++ ret = iei_wt61p803_puzzle_sysfs_create(dev, mcu);
++ if (ret)
++ return ret;
++
++ return devm_of_platform_populate(dev);
++}
++
++static void iei_wt61p803_puzzle_remove(struct serdev_device *serdev)
++{
++ struct device *dev = &serdev->dev;
++ struct iei_wt61p803_puzzle *mcu = dev_get_drvdata(dev);
++
++ iei_wt61p803_puzzle_sysfs_remove(dev, mcu);
++}
++
++static const struct of_device_id iei_wt61p803_puzzle_dt_ids[] = {
++ { .compatible = "iei,wt61p803-puzzle" },
++ { }
++};
++
++MODULE_DEVICE_TABLE(of, iei_wt61p803_puzzle_dt_ids);
++
++static struct serdev_device_driver iei_wt61p803_puzzle_drv = {
++ .probe = iei_wt61p803_puzzle_probe,
++ .remove = iei_wt61p803_puzzle_remove,
++ .driver = {
++ .name = "iei-wt61p803-puzzle",
++ .of_match_table = iei_wt61p803_puzzle_dt_ids,
++ },
++};
++
++module_serdev_device_driver(iei_wt61p803_puzzle_drv);
++
++MODULE_LICENSE("GPL v2");
++MODULE_AUTHOR("Luka Kovacic <luka.kovacic at sartura.hr>");
++MODULE_DESCRIPTION("IEI WT61P803 PUZZLE MCU Driver");
+--- /dev/null
++++ b/include/linux/mfd/iei-wt61p803-puzzle.h
+@@ -0,0 +1,66 @@
++/* SPDX-License-Identifier: GPL-2.0-only */
++/* IEI WT61P803 PUZZLE MCU Driver
++ * System management microcontroller for fan control, temperature sensor reading,
++ * LED control and system identification on IEI Puzzle series ARM-based appliances.
++ *
++ * Copyright (C) 2020 Sartura Ltd.
++ * Author: Luka Kovacic <luka.kovacic at sartura.hr>
++ */
++
++#ifndef _MFD_IEI_WT61P803_PUZZLE_H_
++#define _MFD_IEI_WT61P803_PUZZLE_H_
++
++#define IEI_WT61P803_PUZZLE_BUF_SIZE 512
++
++/* Command magic numbers */
++#define IEI_WT61P803_PUZZLE_CMD_HEADER_START 0x40 /* @ */
++#define IEI_WT61P803_PUZZLE_CMD_HEADER_START_OTHER 0x25 /* % */
++#define IEI_WT61P803_PUZZLE_CMD_HEADER_EEPROM 0xF7
++
++#define IEI_WT61P803_PUZZLE_CMD_RESPONSE_OK 0x30 /* 0 */
++#define IEI_WT61P803_PUZZLE_CHECKSUM_RESPONSE_OK 0x70
++
++#define IEI_WT61P803_PUZZLE_CMD_EEPROM_READ 0xA1
++#define IEI_WT61P803_PUZZLE_CMD_EEPROM_WRITE 0xA0
++
++#define IEI_WT61P803_PUZZLE_CMD_OTHER_VERSION 0x56 /* V */
++#define IEI_WT61P803_PUZZLE_CMD_OTHER_BUILD 0x42 /* B */
++#define IEI_WT61P803_PUZZLE_CMD_OTHER_BOOTLOADER_MODE 0x4D /* M */
++#define IEI_WT61P803_PUZZLE_CMD_OTHER_MODE_BOOTLOADER 0x30
++#define IEI_WT61P803_PUZZLE_CMD_OTHER_MODE_APPS 0x31
++#define IEI_WT61P803_PUZZLE_CMD_OTHER_PROTOCOL_VERSION 0x50 /* P */
++
++#define IEI_WT61P803_PUZZLE_CMD_FUNCTION_SINGLE 0x43 /* C */
++#define IEI_WT61P803_PUZZLE_CMD_FUNCTION_OTHER 0x4F /* O */
++#define IEI_WT61P803_PUZZLE_CMD_FUNCTION_OTHER_STATUS 0x53 /* S */
++#define IEI_WT61P803_PUZZLE_CMD_FUNCTION_OTHER_POWER_LOSS 0x41 /* A */
++
++#define IEI_WT61P803_PUZZLE_CMD_LED 0x52 /* R */
++#define IEI_WT61P803_PUZZLE_CMD_LED_POWER 0x31 /* 1 */
++
++#define IEI_WT61P803_PUZZLE_CMD_TEMP 0x54 /* T */
++#define IEI_WT61P803_PUZZLE_CMD_TEMP_ALL 0x41 /* A */
++
++#define IEI_WT61P803_PUZZLE_CMD_FAN 0x46 /* F */
++#define IEI_WT61P803_PUZZLE_CMD_FAN_PWM_READ 0x5A /* Z */
++#define IEI_WT61P803_PUZZLE_CMD_FAN_PWM_WRITE 0x57 /* W */
++#define IEI_WT61P803_PUZZLE_CMD_FAN_PWM_BASE 0x30
++#define IEI_WT61P803_PUZZLE_CMD_FAN_RPM_BASE 0x41 /* A */
++
++#define IEI_WT61P803_PUZZLE_CMD_FAN_PWM(x) (IEI_WT61P803_PUZZLE_CMD_FAN_PWM_BASE + (x)) /* 0 - 1 */
++#define IEI_WT61P803_PUZZLE_CMD_FAN_RPM(x) (IEI_WT61P803_PUZZLE_CMD_FAN_RPM_BASE + (x)) /* 0 - 5 */
++
++struct iei_wt61p803_puzzle_mcu_version;
++struct iei_wt61p803_puzzle_reply;
++struct iei_wt61p803_puzzle;
++
++int iei_wt61p803_puzzle_write_command_watchdog(struct iei_wt61p803_puzzle *mcu,
++ unsigned char *cmd, size_t size,
++ unsigned char *reply_data, size_t *reply_size,
++ int retry_count);
++
++int iei_wt61p803_puzzle_write_command(struct iei_wt61p803_puzzle *mcu,
++ unsigned char *cmd, size_t size,
++ unsigned char *reply_data, size_t *reply_size);
++
++#endif /* _MFD_IEI_WT61P803_PUZZLE_H_ */
diff --git a/target/linux/mvebu/patches-5.4/903-drivers-hwmon-Add-the-IEI-WT61P803-PUZZLE-HWMON-driv.patch b/target/linux/mvebu/patches-5.4/903-drivers-hwmon-Add-the-IEI-WT61P803-PUZZLE-HWMON-driv.patch
new file mode 100644
index 0000000000..550ce6387a
--- /dev/null
+++ b/target/linux/mvebu/patches-5.4/903-drivers-hwmon-Add-the-IEI-WT61P803-PUZZLE-HWMON-driv.patch
@@ -0,0 +1,469 @@
+From e3310a638cd310bfd93dbbc6d2732ab6aea18dd2 Mon Sep 17 00:00:00 2001
+From: Luka Kovacic <luka.kovacic () sartura ! hr>
+Date: Tue, 24 Aug 2021 12:44:34 +0000
+Subject: [PATCH 3/7] drivers: hwmon: Add the IEI WT61P803 PUZZLE HWMON driver
+
+Add the IEI WT61P803 PUZZLE HWMON driver, that handles the fan speed
+control via PWM, reading fan speed and reading on-board temperature
+sensors.
+
+The driver registers a HWMON device and a simple thermal cooling device to
+enable in-kernel fan management.
+
+This driver depends on the IEI WT61P803 PUZZLE MFD driver.
+
+Signed-off-by: Luka Kovacic <luka.kovacic at sartura.hr>
+Signed-off-by: Pavo Banicevic <pavo.banicevic at sartura.hr>
+Acked-by: Guenter Roeck <linux at roeck-us.net>
+Cc: Luka Perkov <luka.perkov at sartura.hr>
+Cc: Robert Marko <robert.marko at sartura.hr>
+---
+ drivers/hwmon/Kconfig | 8 +
+ drivers/hwmon/Makefile | 1 +
+ drivers/hwmon/iei-wt61p803-puzzle-hwmon.c | 413 ++++++++++++++++++++++
+ 3 files changed, 422 insertions(+)
+ create mode 100644 drivers/hwmon/iei-wt61p803-puzzle-hwmon.c
+
+--- a/drivers/hwmon/Kconfig
++++ b/drivers/hwmon/Kconfig
+@@ -639,6 +639,14 @@ config SENSORS_IBMPOWERNV
+ This driver can also be built as a module. If so, the module
+ will be called ibmpowernv.
+
++config SENSORS_IEI_WT61P803_PUZZLE_HWMON
++ tristate "IEI WT61P803 PUZZLE MFD HWMON Driver"
++ depends on MFD_IEI_WT61P803_PUZZLE
++ help
++ The IEI WT61P803 PUZZLE MFD HWMON Driver handles reading fan speed
++ and writing fan PWM values. It also supports reading on-board
++ temperature sensors.
++
+ config SENSORS_IIO_HWMON
+ tristate "Hwmon driver that uses channels specified via iio maps"
+ depends on IIO
+--- a/drivers/hwmon/Makefile
++++ b/drivers/hwmon/Makefile
+@@ -77,6 +77,7 @@ obj-$(CONFIG_SENSORS_HIH6130) += hih6130
+ obj-$(CONFIG_SENSORS_ULTRA45) += ultra45_env.o
+ obj-$(CONFIG_SENSORS_I5500) += i5500_temp.o
+ obj-$(CONFIG_SENSORS_I5K_AMB) += i5k_amb.o
++obj-$(CONFIG_SENSORS_IEI_WT61P803_PUZZLE_HWMON) += iei-wt61p803-puzzle-hwmon.o
+ obj-$(CONFIG_SENSORS_IBMAEM) += ibmaem.o
+ obj-$(CONFIG_SENSORS_IBMPEX) += ibmpex.o
+ obj-$(CONFIG_SENSORS_IBMPOWERNV)+= ibmpowernv.o
+--- /dev/null
++++ b/drivers/hwmon/iei-wt61p803-puzzle-hwmon.c
+@@ -0,0 +1,413 @@
++// SPDX-License-Identifier: GPL-2.0-only
++/* IEI WT61P803 PUZZLE MCU HWMON Driver
++ *
++ * Copyright (C) 2020 Sartura Ltd.
++ * Author: Luka Kovacic <luka.kovacic at sartura.hr>
++ */
++
++#include <linux/err.h>
++#include <linux/hwmon.h>
++#include <linux/interrupt.h>
++#include <linux/irq.h>
++#include <linux/math64.h>
++#include <linux/mfd/iei-wt61p803-puzzle.h>
++#include <linux/mod_devicetable.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/property.h>
++#include <linux/slab.h>
++#include <linux/thermal.h>
++
++#define IEI_WT61P803_PUZZLE_HWMON_MAX_PWM 2
++#define IEI_WT61P803_PUZZLE_HWMON_MAX_PWM_VAL 255
++
++/**
++ * struct iei_wt61p803_puzzle_thermal_cooling_device - Thermal cooling device instance
++ * @mcu_hwmon: Parent driver struct pointer
++ * @tcdev: Thermal cooling device pointer
++ * @name: Thermal cooling device name
++ * @pwm_channel: Controlled PWM channel (0 or 1)
++ * @cooling_levels: Thermal cooling device cooling levels (DT)
++ */
++struct iei_wt61p803_puzzle_thermal_cooling_device {
++ struct iei_wt61p803_puzzle_hwmon *mcu_hwmon;
++ struct thermal_cooling_device *tcdev;
++ char name[THERMAL_NAME_LENGTH];
++ int pwm_channel;
++ u8 *cooling_levels;
++};
++
++/**
++ * struct iei_wt61p803_puzzle_hwmon - MCU HWMON Driver
++ * @mcu: MCU struct pointer
++ * @response_buffer Global MCU response buffer
++ * @thermal_cooling_dev_present: Per-channel thermal cooling device control indicator
++ * @cdev: Per-channel thermal cooling device private structure
++ */
++struct iei_wt61p803_puzzle_hwmon {
++ struct iei_wt61p803_puzzle *mcu;
++ unsigned char response_buffer[IEI_WT61P803_PUZZLE_BUF_SIZE];
++ bool thermal_cooling_dev_present[IEI_WT61P803_PUZZLE_HWMON_MAX_PWM];
++ struct iei_wt61p803_puzzle_thermal_cooling_device
++ *cdev[IEI_WT61P803_PUZZLE_HWMON_MAX_PWM];
++ struct mutex lock; /* mutex to protect response_buffer array */
++};
++
++#define raw_temp_to_milidegree_celsius(x) (((x) - 0x80) * 1000)
++static int iei_wt61p803_puzzle_read_temp_sensor(struct iei_wt61p803_puzzle_hwmon *mcu_hwmon,
++ int channel, long *value)
++{
++ unsigned char *resp_buf = mcu_hwmon->response_buffer;
++ unsigned char temp_sensor_ntc_cmd[4] = {
++ IEI_WT61P803_PUZZLE_CMD_HEADER_START,
++ IEI_WT61P803_PUZZLE_CMD_TEMP,
++ IEI_WT61P803_PUZZLE_CMD_TEMP_ALL,
++ };
++ size_t reply_size;
++ int ret;
++
++ mutex_lock(&mcu_hwmon->lock);
++ ret = iei_wt61p803_puzzle_write_command(mcu_hwmon->mcu, temp_sensor_ntc_cmd,
++ sizeof(temp_sensor_ntc_cmd), resp_buf,
++ &reply_size);
++ if (ret)
++ goto exit;
++
++ if (reply_size != 7) {
++ ret = -EIO;
++ goto exit;
++ }
++
++ /* Check the number of NTC values */
++ if (resp_buf[3] != '2') {
++ ret = -EIO;
++ goto exit;
++ }
++
++ *value = raw_temp_to_milidegree_celsius(resp_buf[4 + channel]);
++exit:
++ mutex_unlock(&mcu_hwmon->lock);
++ return ret;
++}
++
++#define raw_fan_val_to_rpm(x, y) ((((x) << 8 | (y)) / 2) * 60)
++static int iei_wt61p803_puzzle_read_fan_speed(struct iei_wt61p803_puzzle_hwmon *mcu_hwmon,
++ int channel, long *value)
++{
++ unsigned char *resp_buf = mcu_hwmon->response_buffer;
++ unsigned char fan_speed_cmd[4] = {};
++ size_t reply_size;
++ int ret;
++
++ fan_speed_cmd[0] = IEI_WT61P803_PUZZLE_CMD_HEADER_START;
++ fan_speed_cmd[1] = IEI_WT61P803_PUZZLE_CMD_FAN;
++ fan_speed_cmd[2] = IEI_WT61P803_PUZZLE_CMD_FAN_RPM(channel);
++
++ mutex_lock(&mcu_hwmon->lock);
++ ret = iei_wt61p803_puzzle_write_command(mcu_hwmon->mcu, fan_speed_cmd,
++ sizeof(fan_speed_cmd), resp_buf,
++ &reply_size);
++ if (ret)
++ goto exit;
++
++ if (reply_size != 7) {
++ ret = -EIO;
++ goto exit;
++ }
++
++ *value = raw_fan_val_to_rpm(resp_buf[3], resp_buf[4]);
++exit:
++ mutex_unlock(&mcu_hwmon->lock);
++ return ret;
++}
++
++static int iei_wt61p803_puzzle_write_pwm_channel(struct iei_wt61p803_puzzle_hwmon *mcu_hwmon,
++ int channel, long pwm_set_val)
++{
++ unsigned char *resp_buf = mcu_hwmon->response_buffer;
++ unsigned char pwm_set_cmd[6] = {};
++ size_t reply_size;
++ int ret;
++
++ pwm_set_cmd[0] = IEI_WT61P803_PUZZLE_CMD_HEADER_START;
++ pwm_set_cmd[1] = IEI_WT61P803_PUZZLE_CMD_FAN;
++ pwm_set_cmd[2] = IEI_WT61P803_PUZZLE_CMD_FAN_PWM_WRITE;
++ pwm_set_cmd[3] = IEI_WT61P803_PUZZLE_CMD_FAN_PWM(channel);
++ pwm_set_cmd[4] = pwm_set_val;
++
++ mutex_lock(&mcu_hwmon->lock);
++ ret = iei_wt61p803_puzzle_write_command(mcu_hwmon->mcu, pwm_set_cmd,
++ sizeof(pwm_set_cmd), resp_buf,
++ &reply_size);
++ if (ret)
++ goto exit;
++
++ if (reply_size != 3) {
++ ret = -EIO;
++ goto exit;
++ }
++
++ if (!(resp_buf[0] == IEI_WT61P803_PUZZLE_CMD_HEADER_START &&
++ resp_buf[1] == IEI_WT61P803_PUZZLE_CMD_RESPONSE_OK &&
++ resp_buf[2] == IEI_WT61P803_PUZZLE_CHECKSUM_RESPONSE_OK)) {
++ ret = -EIO;
++ goto exit;
++ }
++exit:
++ mutex_unlock(&mcu_hwmon->lock);
++ return ret;
++}
++
++static int iei_wt61p803_puzzle_read_pwm_channel(struct iei_wt61p803_puzzle_hwmon *mcu_hwmon,
++ int channel, long *value)
++{
++ unsigned char *resp_buf = mcu_hwmon->response_buffer;
++ unsigned char pwm_get_cmd[5] = {};
++ size_t reply_size;
++ int ret;
++
++ pwm_get_cmd[0] = IEI_WT61P803_PUZZLE_CMD_HEADER_START;
++ pwm_get_cmd[1] = IEI_WT61P803_PUZZLE_CMD_FAN;
++ pwm_get_cmd[2] = IEI_WT61P803_PUZZLE_CMD_FAN_PWM_READ;
++ pwm_get_cmd[3] = IEI_WT61P803_PUZZLE_CMD_FAN_PWM(channel);
++
++ ret = iei_wt61p803_puzzle_write_command(mcu_hwmon->mcu, pwm_get_cmd,
++ sizeof(pwm_get_cmd), resp_buf,
++ &reply_size);
++ if (ret)
++ return ret;
++
++ if (reply_size != 5)
++ return -EIO;
++
++ if (resp_buf[2] != IEI_WT61P803_PUZZLE_CMD_FAN_PWM_READ)
++ return -EIO;
++
++ *value = resp_buf[3];
++
++ return 0;
++}
++
++static int iei_wt61p803_puzzle_read(struct device *dev, enum hwmon_sensor_types type,
++ u32 attr, int channel, long *val)
++{
++ struct iei_wt61p803_puzzle_hwmon *mcu_hwmon = dev_get_drvdata(dev->parent);
++
++ switch (type) {
++ case hwmon_pwm:
++ return iei_wt61p803_puzzle_read_pwm_channel(mcu_hwmon, channel, val);
++ case hwmon_fan:
++ return iei_wt61p803_puzzle_read_fan_speed(mcu_hwmon, channel, val);
++ case hwmon_temp:
++ return iei_wt61p803_puzzle_read_temp_sensor(mcu_hwmon, channel, val);
++ default:
++ return -EINVAL;
++ }
++}
++
++static int iei_wt61p803_puzzle_write(struct device *dev, enum hwmon_sensor_types type,
++ u32 attr, int channel, long val)
++{
++ struct iei_wt61p803_puzzle_hwmon *mcu_hwmon = dev_get_drvdata(dev->parent);
++
++ return iei_wt61p803_puzzle_write_pwm_channel(mcu_hwmon, channel, val);
++}
++
++static umode_t iei_wt61p803_puzzle_is_visible(const void *data, enum hwmon_sensor_types type,
++ u32 attr, int channel)
++{
++ const struct iei_wt61p803_puzzle_hwmon *mcu_hwmon = data;
++
++ switch (type) {
++ case hwmon_pwm:
++ if (mcu_hwmon->thermal_cooling_dev_present[channel])
++ return 0444;
++ if (attr == hwmon_pwm_input)
++ return 0644;
++ break;
++ case hwmon_fan:
++ if (attr == hwmon_fan_input)
++ return 0444;
++ break;
++ case hwmon_temp:
++ if (attr == hwmon_temp_input)
++ return 0444;
++ break;
++ default:
++ return 0;
++ }
++
++ return 0;
++}
++
++static const struct hwmon_ops iei_wt61p803_puzzle_hwmon_ops = {
++ .is_visible = iei_wt61p803_puzzle_is_visible,
++ .read = iei_wt61p803_puzzle_read,
++ .write = iei_wt61p803_puzzle_write,
++};
++
++static const struct hwmon_channel_info *iei_wt61p803_puzzle_info[] = {
++ HWMON_CHANNEL_INFO(pwm,
++ HWMON_PWM_INPUT,
++ HWMON_PWM_INPUT),
++ HWMON_CHANNEL_INFO(fan,
++ HWMON_F_INPUT,
++ HWMON_F_INPUT,
++ HWMON_F_INPUT,
++ HWMON_F_INPUT,
++ HWMON_F_INPUT),
++ HWMON_CHANNEL_INFO(temp,
++ HWMON_T_INPUT,
++ HWMON_T_INPUT),
++ NULL
++};
++
++static const struct hwmon_chip_info iei_wt61p803_puzzle_chip_info = {
++ .ops = &iei_wt61p803_puzzle_hwmon_ops,
++ .info = iei_wt61p803_puzzle_info,
++};
++
++static int iei_wt61p803_puzzle_get_max_state(struct thermal_cooling_device *tcdev,
++ unsigned long *state)
++{
++ *state = IEI_WT61P803_PUZZLE_HWMON_MAX_PWM_VAL;
++
++ return 0;
++}
++
++static int iei_wt61p803_puzzle_get_cur_state(struct thermal_cooling_device *tcdev,
++ unsigned long *state)
++{
++ struct iei_wt61p803_puzzle_thermal_cooling_device *cdev = tcdev->devdata;
++ struct iei_wt61p803_puzzle_hwmon *mcu_hwmon = cdev->mcu_hwmon;
++ long value;
++ int ret;
++
++ ret = iei_wt61p803_puzzle_read_pwm_channel(mcu_hwmon, cdev->pwm_channel, &value);
++ if (ret)
++ return ret;
++ *state = value;
++ return 0;
++}
++
++static int iei_wt61p803_puzzle_set_cur_state(struct thermal_cooling_device *tcdev,
++ unsigned long state)
++{
++ struct iei_wt61p803_puzzle_thermal_cooling_device *cdev = tcdev->devdata;
++ struct iei_wt61p803_puzzle_hwmon *mcu_hwmon = cdev->mcu_hwmon;
++
++ return iei_wt61p803_puzzle_write_pwm_channel(mcu_hwmon, cdev->pwm_channel, state);
++}
++
++static const struct thermal_cooling_device_ops iei_wt61p803_puzzle_cooling_ops = {
++ .get_max_state = iei_wt61p803_puzzle_get_max_state,
++ .get_cur_state = iei_wt61p803_puzzle_get_cur_state,
++ .set_cur_state = iei_wt61p803_puzzle_set_cur_state,
++};
++
++static int
++iei_wt61p803_puzzle_enable_thermal_cooling_dev(struct device *dev,
++ struct fwnode_handle *child,
++ struct iei_wt61p803_puzzle_hwmon *mcu_hwmon)
++{
++ struct iei_wt61p803_puzzle_thermal_cooling_device *cdev;
++ u32 pwm_channel;
++ u8 num_levels;
++ int ret;
++
++ ret = fwnode_property_read_u32(child, "reg", &pwm_channel);
++ if (ret)
++ return ret;
++
++ mcu_hwmon->thermal_cooling_dev_present[pwm_channel] = true;
++
++ num_levels = fwnode_property_count_u8(child, "cooling-levels");
++ if (!num_levels)
++ return -EINVAL;
++
++ cdev = devm_kzalloc(dev, sizeof(*cdev), GFP_KERNEL);
++ if (!cdev)
++ return -ENOMEM;
++
++ cdev->cooling_levels = devm_kmalloc_array(dev, num_levels, sizeof(u8), GFP_KERNEL);
++ if (!cdev->cooling_levels)
++ return -ENOMEM;
++
++ ret = fwnode_property_read_u8_array(child, "cooling-levels",
++ cdev->cooling_levels,
++ num_levels);
++ if (ret) {
++ dev_err(dev, "Couldn't read property 'cooling-levels'\n");
++ return ret;
++ }
++
++ snprintf(cdev->name, THERMAL_NAME_LENGTH, "wt61p803_puzzle_%d", pwm_channel);
++ cdev->tcdev = devm_thermal_of_cooling_device_register(dev, NULL, cdev->name, cdev,
++ &iei_wt61p803_puzzle_cooling_ops);
++ if (IS_ERR(cdev->tcdev))
++ return PTR_ERR(cdev->tcdev);
++
++ cdev->mcu_hwmon = mcu_hwmon;
++ cdev->pwm_channel = pwm_channel;
++ mcu_hwmon->cdev[pwm_channel] = cdev;
++
++ return 0;
++}
++
++static int iei_wt61p803_puzzle_hwmon_probe(struct platform_device *pdev)
++{
++ struct device *dev = &pdev->dev;
++ struct iei_wt61p803_puzzle *mcu = dev_get_drvdata(dev->parent);
++ struct iei_wt61p803_puzzle_hwmon *mcu_hwmon;
++ struct fwnode_handle *child;
++ struct device *hwmon_dev;
++ int ret;
++
++ mcu_hwmon = devm_kzalloc(dev, sizeof(*mcu_hwmon), GFP_KERNEL);
++ if (!mcu_hwmon)
++ return -ENOMEM;
++
++ mcu_hwmon->mcu = mcu;
++ platform_set_drvdata(pdev, mcu_hwmon);
++ mutex_init(&mcu_hwmon->lock);
++
++ hwmon_dev = devm_hwmon_device_register_with_info(dev, "iei_wt61p803_puzzle",
++ mcu_hwmon,
++ &iei_wt61p803_puzzle_chip_info,
++ NULL);
++ if (IS_ERR(hwmon_dev))
++ return PTR_ERR(hwmon_dev);
++
++ /* Control fans via PWM lines via Linux Kernel */
++ if (IS_ENABLED(CONFIG_THERMAL)) {
++ device_for_each_child_node(dev, child) {
++ ret = iei_wt61p803_puzzle_enable_thermal_cooling_dev(dev, child, mcu_hwmon);
++ if (ret) {
++ dev_err(dev, "Enabling the PWM fan failed\n");
++ fwnode_handle_put(child);
++ return ret;
++ }
++ }
++ }
++ return 0;
++}
++
++static const struct of_device_id iei_wt61p803_puzzle_hwmon_id_table[] = {
++ { .compatible = "iei,wt61p803-puzzle-hwmon" },
++ {}
++};
++MODULE_DEVICE_TABLE(of, iei_wt61p803_puzzle_hwmon_id_table);
++
++static struct platform_driver iei_wt61p803_puzzle_hwmon_driver = {
++ .driver = {
++ .name = "iei-wt61p803-puzzle-hwmon",
++ .of_match_table = iei_wt61p803_puzzle_hwmon_id_table,
++ },
++ .probe = iei_wt61p803_puzzle_hwmon_probe,
++};
++
++module_platform_driver(iei_wt61p803_puzzle_hwmon_driver);
++
++MODULE_DESCRIPTION("IEI WT61P803 PUZZLE MCU HWMON Driver");
++MODULE_AUTHOR("Luka Kovacic <luka.kovacic at sartura.hr>");
++MODULE_LICENSE("GPL v2");
diff --git a/target/linux/mvebu/patches-5.4/904-drivers-leds-Add-the-IEI-WT61P803-PUZZLE-LED-driver.patch b/target/linux/mvebu/patches-5.4/904-drivers-leds-Add-the-IEI-WT61P803-PUZZLE-LED-driver.patch
new file mode 100644
index 0000000000..55224a2a20
--- /dev/null
+++ b/target/linux/mvebu/patches-5.4/904-drivers-leds-Add-the-IEI-WT61P803-PUZZLE-LED-driver.patch
@@ -0,0 +1,207 @@
+From f3b44eb69cc561cf05d00506dcec0dd9be003ed8 Mon Sep 17 00:00:00 2001
+From: Luka Kovacic <luka.kovacic () sartura ! hr>
+Date: Tue, 24 Aug 2021 12:44:35 +0000
+Subject: [PATCH 4/7] drivers: leds: Add the IEI WT61P803 PUZZLE LED driver
+
+Add support for the IEI WT61P803 PUZZLE LED driver.
+Currently only the front panel power LED is supported,
+since it is the only LED on this board wired through the
+MCU.
+
+The LED is wired directly to the on-board MCU controller
+and is toggled using an MCU command.
+
+Support for more LEDs is going to be added in case more
+boards implement this microcontroller, as LEDs use many
+different GPIOs.
+
+This driver depends on the IEI WT61P803 PUZZLE MFD driver.
+
+Signed-off-by: Luka Kovacic <luka.kovacic at sartura.hr>
+Signed-off-by: Pavo Banicevic <pavo.banicevic at sartura.hr>
+Cc: Luka Perkov <luka.perkov at sartura.hr>
+Cc: Robert Marko <robert.marko at sartura.hr>
+---
+ drivers/leds/Kconfig | 8 ++
+ drivers/leds/Makefile | 1 +
+ drivers/leds/leds-iei-wt61p803-puzzle.c | 147 ++++++++++++++++++++++++
+ 3 files changed, 156 insertions(+)
+ create mode 100644 drivers/leds/leds-iei-wt61p803-puzzle.c
+
+--- a/drivers/leds/Kconfig
++++ b/drivers/leds/Kconfig
+@@ -278,6 +278,14 @@ config LEDS_IPAQ_MICRO
+ Choose this option if you want to use the notification LED on
+ Compaq/HP iPAQ h3100 and h3600.
+
++config LEDS_IEI_WT61P803_PUZZLE
++ tristate "LED Support for the IEI WT61P803 PUZZLE MCU"
++ depends on LEDS_CLASS
++ depends on MFD_IEI_WT61P803_PUZZLE
++ help
++ This option enables support for LEDs controlled by the IEI WT61P803
++ M801 MCU.
++
+ config LEDS_HP6XX
+ tristate "LED Support for the HP Jornada 6xx"
+ depends on LEDS_CLASS
+--- a/drivers/leds/Makefile
++++ b/drivers/leds/Makefile
+@@ -43,6 +43,7 @@ obj-$(CONFIG_LEDS_LP8860) += leds-lp886
+ obj-$(CONFIG_LEDS_TCA6507) += leds-tca6507.o
+ obj-$(CONFIG_LEDS_TLC591XX) += leds-tlc591xx.o
+ obj-$(CONFIG_LEDS_CLEVO_MAIL) += leds-clevo-mail.o
++obj-$(CONFIG_LEDS_IEI_WT61P803_PUZZLE) += leds-iei-wt61p803-puzzle.o
+ obj-$(CONFIG_LEDS_IPAQ_MICRO) += leds-ipaq-micro.o
+ obj-$(CONFIG_LEDS_HP6XX) += leds-hp6xx.o
+ obj-$(CONFIG_LEDS_OT200) += leds-ot200.o
+--- /dev/null
++++ b/drivers/leds/leds-iei-wt61p803-puzzle.c
+@@ -0,0 +1,147 @@
++// SPDX-License-Identifier: GPL-2.0-only
++/* IEI WT61P803 PUZZLE MCU LED Driver
++ *
++ * Copyright (C) 2020 Sartura Ltd.
++ * Author: Luka Kovacic <luka.kovacic at sartura.hr>
++ */
++
++#include <linux/leds.h>
++#include <linux/mfd/iei-wt61p803-puzzle.h>
++#include <linux/mod_devicetable.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/property.h>
++#include <linux/slab.h>
++
++enum iei_wt61p803_puzzle_led_state {
++ IEI_LED_OFF = 0x30,
++ IEI_LED_ON = 0x31,
++ IEI_LED_BLINK_5HZ = 0x32,
++ IEI_LED_BLINK_1HZ = 0x33,
++};
++
++/**
++ * struct iei_wt61p803_puzzle_led - MCU LED Driver
++ * @cdev: LED classdev
++ * @mcu: MCU struct pointer
++ * @response_buffer Global MCU response buffer
++ * @lock: General mutex lock to protect simultaneous R/W access to led_power_state
++ * @led_power_state: State of the front panel power LED
++ */
++struct iei_wt61p803_puzzle_led {
++ struct led_classdev cdev;
++ struct iei_wt61p803_puzzle *mcu;
++ unsigned char response_buffer[IEI_WT61P803_PUZZLE_BUF_SIZE];
++ struct mutex lock; /* mutex to protect led_power_state */
++ int led_power_state;
++};
++
++static inline struct iei_wt61p803_puzzle_led *cdev_to_iei_wt61p803_puzzle_led
++ (struct led_classdev *led_cdev)
++{
++ return container_of(led_cdev, struct iei_wt61p803_puzzle_led, cdev);
++}
++
++static int iei_wt61p803_puzzle_led_brightness_set_blocking(struct led_classdev *cdev,
++ enum led_brightness brightness)
++{
++ struct iei_wt61p803_puzzle_led *priv = cdev_to_iei_wt61p803_puzzle_led(cdev);
++ unsigned char *resp_buf = priv->response_buffer;
++ unsigned char led_power_cmd[5] = {};
++ size_t reply_size;
++ int ret;
++
++ led_power_cmd[0] = IEI_WT61P803_PUZZLE_CMD_HEADER_START;
++ led_power_cmd[1] = IEI_WT61P803_PUZZLE_CMD_LED;
++ led_power_cmd[2] = IEI_WT61P803_PUZZLE_CMD_LED_POWER;
++ led_power_cmd[3] = brightness == LED_OFF ? IEI_LED_OFF : IEI_LED_ON;
++
++ ret = iei_wt61p803_puzzle_write_command(priv->mcu, led_power_cmd,
++ sizeof(led_power_cmd),
++ resp_buf,
++ &reply_size);
++ if (ret)
++ return ret;
++
++ if (reply_size != 3)
++ return -EIO;
++
++ if (!(resp_buf[0] == IEI_WT61P803_PUZZLE_CMD_HEADER_START &&
++ resp_buf[1] == IEI_WT61P803_PUZZLE_CMD_RESPONSE_OK &&
++ resp_buf[2] == IEI_WT61P803_PUZZLE_CHECKSUM_RESPONSE_OK))
++ return -EIO;
++
++ mutex_lock(&priv->lock);
++ priv->led_power_state = brightness;
++ mutex_unlock(&priv->lock);
++
++ return 0;
++}
++
++static enum led_brightness iei_wt61p803_puzzle_led_brightness_get(struct led_classdev *cdev)
++{
++ struct iei_wt61p803_puzzle_led *priv = cdev_to_iei_wt61p803_puzzle_led(cdev);
++ int led_state;
++
++ mutex_lock(&priv->lock);
++ led_state = priv->led_power_state;
++ mutex_unlock(&priv->lock);
++
++ return led_state;
++}
++
++static int iei_wt61p803_puzzle_led_probe(struct platform_device *pdev)
++{
++ struct device *dev = &pdev->dev;
++ struct iei_wt61p803_puzzle *mcu = dev_get_drvdata(dev->parent);
++ struct iei_wt61p803_puzzle_led *priv;
++ struct led_init_data init_data = {};
++ struct fwnode_handle *child;
++ int ret;
++
++ if (device_get_child_node_count(dev) != 1)
++ return -EINVAL;
++
++ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
++ if (!priv)
++ return -ENOMEM;
++
++ priv->mcu = mcu;
++ priv->led_power_state = 1;
++ mutex_init(&priv->lock);
++ dev_set_drvdata(dev, priv);
++
++ child = device_get_next_child_node(dev, NULL);
++ init_data.fwnode = child;
++
++ priv->cdev.brightness_set_blocking = iei_wt61p803_puzzle_led_brightness_set_blocking;
++ priv->cdev.brightness_get = iei_wt61p803_puzzle_led_brightness_get;
++ priv->cdev.max_brightness = 1;
++
++ ret = devm_led_classdev_register_ext(dev, &priv->cdev, &init_data);
++ if (ret)
++ dev_err(dev, "Could not register LED\n");
++
++ fwnode_handle_put(child);
++ return ret;
++}
++
++static const struct of_device_id iei_wt61p803_puzzle_led_of_match[] = {
++ { .compatible = "iei,wt61p803-puzzle-leds" },
++ { }
++};
++MODULE_DEVICE_TABLE(of, iei_wt61p803_puzzle_led_of_match);
++
++static struct platform_driver iei_wt61p803_puzzle_led_driver = {
++ .driver = {
++ .name = "iei-wt61p803-puzzle-led",
++ .of_match_table = iei_wt61p803_puzzle_led_of_match,
++ },
++ .probe = iei_wt61p803_puzzle_led_probe,
++};
++module_platform_driver(iei_wt61p803_puzzle_led_driver);
++
++MODULE_DESCRIPTION("IEI WT61P803 PUZZLE front panel LED driver");
++MODULE_AUTHOR("Luka Kovacic <luka.kovacic at sartura.hr>");
++MODULE_LICENSE("GPL v2");
++MODULE_ALIAS("platform:leds-iei-wt61p803-puzzle");
diff --git a/target/linux/mvebu/patches-5.4/905-Documentation-ABI-Add-iei-wt61p803-puzzle-driver-sys.patch b/target/linux/mvebu/patches-5.4/905-Documentation-ABI-Add-iei-wt61p803-puzzle-driver-sys.patch
new file mode 100644
index 0000000000..b1d420ef0a
--- /dev/null
+++ b/target/linux/mvebu/patches-5.4/905-Documentation-ABI-Add-iei-wt61p803-puzzle-driver-sys.patch
@@ -0,0 +1,82 @@
+From 2fab3b4956c5b2f83c1e1abffc1df39de2933d83 Mon Sep 17 00:00:00 2001
+From: Luka Kovacic <luka.kovacic () sartura ! hr>
+Date: Tue, 24 Aug 2021 12:44:36 +0000
+Subject: [PATCH 5/7] Documentation/ABI: Add iei-wt61p803-puzzle driver sysfs
+ interface documentation
+
+Add the iei-wt61p803-puzzle driver sysfs interface documentation to allow
+monitoring and control of the microcontroller from user space.
+
+Signed-off-by: Luka Kovacic <luka.kovacic at sartura.hr>
+Signed-off-by: Pavo Banicevic <pavo.banicevic at sartura.hr>
+Cc: Luka Perkov <luka.perkov at sartura.hr>
+Cc: Robert Marko <robert.marko at sartura.hr>
+---
+ .../testing/sysfs-driver-iei-wt61p803-puzzle | 61 +++++++++++++++++++
+ 1 file changed, 61 insertions(+)
+ create mode 100644 Documentation/ABI/testing/sysfs-driver-iei-wt61p803-puzzle
+
+--- /dev/null
++++ b/Documentation/ABI/testing/sysfs-driver-iei-wt61p803-puzzle
+@@ -0,0 +1,61 @@
++What: /sys/bus/serial/devices/.../mac_address_*
++Date: September 2020
++Contact: Luka Kovacic <luka.kovacic at sartura.hr>
++Description: (RW) Internal factory assigned MAC address values
++
++What: /sys/bus/serial/devices/.../serial_number
++Date: September 2020
++Contact: Luka Kovacic <luka.kovacic at sartura.hr>
++Description: (RW) Internal factory assigned serial number
++
++What: /sys/bus/serial/devices/.../version
++Date: September 2020
++Contact: Luka Kovacic <luka.kovacic at sartura.hr>
++Description: (RO) Internal MCU firmware version
++
++What: /sys/bus/serial/devices/.../protocol_version
++Date: September 2020
++Contact: Luka Kovacic <luka.kovacic at sartura.hr>
++Description: (RO) Internal MCU communication protocol version
++
++What: /sys/bus/serial/devices/.../power_loss_recovery
++Date: September 2020
++Contact: Luka Kovacic <luka.kovacic at sartura.hr>
++Description: (RW) Host platform power loss recovery settings
++ Value mapping: 0 - Always-On, 1 - Always-Off, 2 - Always-AC, 3 - Always-WA
++
++What: /sys/bus/serial/devices/.../bootloader_mode
++Date: September 2020
++Contact: Luka Kovacic <luka.kovacic at sartura.hr>
++Description: (RO) Internal MCU bootloader mode status
++ Value mapping:
++ 0 - normal mode
++ 1 - bootloader mode
++
++What: /sys/bus/serial/devices/.../power_status
++Date: September 2020
++Contact: Luka Kovacic <luka.kovacic at sartura.hr>
++Description: (RO) Power status indicates the host platform power on method.
++ Value mapping (bitwise list):
++ 0x80 - Null
++ 0x40 - Firmware flag
++ 0x20 - Power loss detection flag (powered off)
++ 0x10 - Power loss detection flag (AC mode)
++ 0x08 - Button power on
++ 0x04 - Wake-on-LAN power on
++ 0x02 - RTC alarm power on
++ 0x01 - AC recover power on
++
++What: /sys/bus/serial/devices/.../build_info
++Date: September 2020
++Contact: Luka Kovacic <luka.kovacic at sartura.hr>
++Description: (RO) Internal MCU firmware build date
++ Format: yyyy/mm/dd hh:mm
++
++What: /sys/bus/serial/devices/.../ac_recovery_status
++Date: September 2020
++Contact: Luka Kovacic <luka.kovacic at sartura.hr>
++Description: (RO) Host platform AC recovery status value
++ Value mapping:
++ 0 - board has not been recovered from power down
++ 1 - board has been recovered from power down
diff --git a/target/linux/mvebu/patches-5.4/906-Documentation-hwmon-Add-iei-wt61p803-puzzle-hwmon-dr.patch b/target/linux/mvebu/patches-5.4/906-Documentation-hwmon-Add-iei-wt61p803-puzzle-hwmon-dr.patch
new file mode 100644
index 0000000000..aaac99ab5d
--- /dev/null
+++ b/target/linux/mvebu/patches-5.4/906-Documentation-hwmon-Add-iei-wt61p803-puzzle-hwmon-dr.patch
@@ -0,0 +1,74 @@
+From 0aff3e5923fecc6842473ad07a688d6e2f2c2d55 Mon Sep 17 00:00:00 2001
+From: Luka Kovacic <luka.kovacic () sartura ! hr>
+Date: Tue, 24 Aug 2021 12:44:37 +0000
+Subject: [PATCH 6/7] Documentation/hwmon: Add iei-wt61p803-puzzle hwmon driver
+ documentation
+
+Add the iei-wt61p803-puzzle driver hwmon driver interface documentation.
+
+Signed-off-by: Luka Kovacic <luka.kovacic at sartura.hr>
+Signed-off-by: Pavo Banicevic <pavo.banicevic at sartura.hr>
+Cc: Luka Perkov <luka.perkov at sartura.hr>
+Cc: Robert Marko <robert.marko at sartura.hr>
+---
+ .../hwmon/iei-wt61p803-puzzle-hwmon.rst | 43 +++++++++++++++++++
+ Documentation/hwmon/index.rst | 1 +
+ 2 files changed, 44 insertions(+)
+ create mode 100644 Documentation/hwmon/iei-wt61p803-puzzle-hwmon.rst
+
+--- /dev/null
++++ b/Documentation/hwmon/iei-wt61p803-puzzle-hwmon.rst
+@@ -0,0 +1,43 @@
++.. SPDX-License-Identifier: GPL-2.0-only
++
++Kernel driver iei-wt61p803-puzzle-hwmon
++=======================================
++
++Supported chips:
++ * IEI WT61P803 PUZZLE for IEI Puzzle M801
++
++ Prefix: 'iei-wt61p803-puzzle-hwmon'
++
++Author: Luka Kovacic <luka.kovacic at sartura.hr>
++
++
++Description
++-----------
++
++This driver adds fan and temperature sensor reading for some IEI Puzzle
++series boards.
++
++Sysfs attributes
++----------------
++
++The following attributes are supported:
++
++- IEI WT61P803 PUZZLE for IEI Puzzle M801
++
++/sys files in hwmon subsystem
++-----------------------------
++
++================= == =====================================================
++fan[1-5]_input RO files for fan speed (in RPM)
++pwm[1-2] RW files for fan[1-2] target duty cycle (0..255)
++temp[1-2]_input RO files for temperature sensors, in millidegree Celsius
++================= == =====================================================
++
++/sys files in thermal subsystem
++-------------------------------
++
++================= == =====================================================
++cur_state RW file for current cooling state of the cooling device
++ (0..max_state)
++max_state RO file for maximum cooling state of the cooling device
++================= == =====================================================
+--- a/Documentation/hwmon/index.rst
++++ b/Documentation/hwmon/index.rst
+@@ -62,6 +62,7 @@ Hardware Monitoring Kernel Drivers
+ ibmaem
+ ibm-cffps
+ ibmpowernv
++ iei-wt61p803-puzzle-hwmon
+ ina209
+ ina2xx
+ ina3221
diff --git a/target/linux/mvebu/patches-5.4/907-MAINTAINERS-Add-an-entry-for-the-IEI-WT61P803-PUZZLE.patch b/target/linux/mvebu/patches-5.4/907-MAINTAINERS-Add-an-entry-for-the-IEI-WT61P803-PUZZLE.patch
new file mode 100644
index 0000000000..830cf33ce4
--- /dev/null
+++ b/target/linux/mvebu/patches-5.4/907-MAINTAINERS-Add-an-entry-for-the-IEI-WT61P803-PUZZLE.patch
@@ -0,0 +1,41 @@
+From 12479baad28d2a08c6cb9e83471057635fa1635c Mon Sep 17 00:00:00 2001
+From: Luka Kovacic <luka.kovacic () sartura ! hr>
+Date: Tue, 24 Aug 2021 12:44:38 +0000
+Subject: [PATCH 7/7] MAINTAINERS: Add an entry for the IEI WT61P803 PUZZLE
+ driver
+
+Add an entry for the IEI WT61P803 PUZZLE driver (MFD, HWMON, LED drivers).
+
+Signed-off-by: Luka Kovacic <luka.kovacic at sartura.hr>
+Signed-off-by: Pavo Banicevic <pavo.banicevic at sartura.hr>
+Cc: Luka Perkov <luka.perkov at sartura.hr>
+Cc: Robert Marko <robert.marko at sartura.hr>
+---
+ MAINTAINERS | 16 ++++++++++++++++
+ 1 file changed, 16 insertions(+)
+
+--- a/MAINTAINERS
++++ b/MAINTAINERS
+@@ -7929,6 +7929,22 @@ F: include/net/cfg802154.h
+ F: include/net/ieee802154_netdev.h
+ F: Documentation/networking/ieee802154.rst
+
++IEI WT61P803 M801 MFD DRIVER
++M: Luka Kovacic <luka.kovacic at sartura.hr>
++M: Luka Perkov <luka.perkov at sartura.hr>
++M: Goran Medic <goran.medic at sartura.hr>
++L: linux-kernel at vger.kernel.org
++S: Maintained
++F: Documentation/ABI/stable/sysfs-driver-iei-wt61p803-puzzle
++F: Documentation/devicetree/bindings/hwmon/iei,wt61p803-puzzle-hwmon.yaml
++F: Documentation/devicetree/bindings/leds/iei,wt61p803-puzzle-leds.yaml
++F: Documentation/devicetree/bindings/mfd/iei,wt61p803-puzzle.yaml
++F: Documentation/hwmon/iei-wt61p803-puzzle-hwmon.rst
++F: drivers/hwmon/iei-wt61p803-puzzle-hwmon.c
++F: drivers/leds/leds-iei-wt61p803-puzzle.c
++F: drivers/mfd/iei-wt61p803-puzzle.c
++F: include/linux/mfd/iei-wt61p803-puzzle.h
++
+ IFE PROTOCOL
+ M: Yotam Gigi <yotam.gi at gmail.com>
+ M: Jamal Hadi Salim <jhs at mojatatu.com>
diff --git a/target/linux/mvebu/patches-5.4/910-drivers-leds-wt61p803-puzzle-improvements.patch b/target/linux/mvebu/patches-5.4/910-drivers-leds-wt61p803-puzzle-improvements.patch
new file mode 100644
index 0000000000..1e065ed6e7
--- /dev/null
+++ b/target/linux/mvebu/patches-5.4/910-drivers-leds-wt61p803-puzzle-improvements.patch
@@ -0,0 +1,247 @@
+--- a/drivers/leds/leds-iei-wt61p803-puzzle.c
++++ b/drivers/leds/leds-iei-wt61p803-puzzle.c
+@@ -9,10 +9,13 @@
+ #include <linux/mfd/iei-wt61p803-puzzle.h>
+ #include <linux/mod_devicetable.h>
+ #include <linux/module.h>
++#include <linux/of.h>
+ #include <linux/platform_device.h>
+ #include <linux/property.h>
+ #include <linux/slab.h>
+
++#define IEI_LEDS_MAX 4
++
+ enum iei_wt61p803_puzzle_led_state {
+ IEI_LED_OFF = 0x30,
+ IEI_LED_ON = 0x31,
+@@ -34,6 +37,9 @@ struct iei_wt61p803_puzzle_led {
+ unsigned char response_buffer[IEI_WT61P803_PUZZLE_BUF_SIZE];
+ struct mutex lock; /* mutex to protect led_power_state */
+ int led_power_state;
++ int id;
++ bool blinking;
++ bool active_low;
+ };
+
+ static inline struct iei_wt61p803_puzzle_led *cdev_to_iei_wt61p803_puzzle_led
+@@ -51,10 +57,20 @@ static int iei_wt61p803_puzzle_led_brigh
+ size_t reply_size;
+ int ret;
+
++ mutex_lock(&priv->lock);
++ if (priv->blinking) {
++ if (brightness == LED_OFF)
++ priv->blinking = false;
++ else
++ return 0;
++ }
++ mutex_unlock(&priv->lock);
++
+ led_power_cmd[0] = IEI_WT61P803_PUZZLE_CMD_HEADER_START;
+ led_power_cmd[1] = IEI_WT61P803_PUZZLE_CMD_LED;
+- led_power_cmd[2] = IEI_WT61P803_PUZZLE_CMD_LED_POWER;
+- led_power_cmd[3] = brightness == LED_OFF ? IEI_LED_OFF : IEI_LED_ON;
++ led_power_cmd[2] = IEI_WT61P803_PUZZLE_CMD_LED_SET(priv->id);
++ led_power_cmd[3] = ((brightness == LED_OFF) ^ priv->active_low) ?
++ IEI_LED_OFF : IEI_LED_ON;
+
+ ret = iei_wt61p803_puzzle_write_command(priv->mcu, led_power_cmd,
+ sizeof(led_power_cmd),
+@@ -90,39 +106,164 @@ static enum led_brightness iei_wt61p803_
+ return led_state;
+ }
+
++static int iei_wt61p803_puzzle_led_set_blink(struct led_classdev *cdev,
++ unsigned long *delay_on,
++ unsigned long *delay_off)
++{
++ struct iei_wt61p803_puzzle_led *priv = cdev_to_iei_wt61p803_puzzle_led(cdev);
++ unsigned char led_blink_cmd[5] = {};
++ unsigned char resp_buf[IEI_WT61P803_PUZZLE_BUF_SIZE];
++ size_t reply_size;
++ int ret = 0;
++
++ /* set defaults */
++ if (!*delay_on && !*delay_off) {
++ *delay_on = 500;
++ *delay_off = 500;
++ }
++
++ /* minimum delay for soft-driven blinking is 50ms to keep load low */
++ if (*delay_on < 50)
++ *delay_on = 50;
++
++ if (*delay_off < 50)
++ *delay_off = 50;
++
++ if (*delay_on != *delay_off)
++ return -EINVAL;
++
++ /* aggressively offload blinking to hardware, if possible */
++ if (*delay_on < 100) {
++ return -EINVAL;
++ } else if (*delay_on < 200) {
++ *delay_on = 100;
++ *delay_off = 100;
++ } else if (*delay_on <= 500) {
++ *delay_on = 500;
++ *delay_off = 500;
++ } else {
++ return -EINVAL;
++ }
++
++ led_blink_cmd[0] = IEI_WT61P803_PUZZLE_CMD_HEADER_START;
++ led_blink_cmd[1] = IEI_WT61P803_PUZZLE_CMD_LED;
++ led_blink_cmd[2] = IEI_WT61P803_PUZZLE_CMD_LED_SET(priv->id);
++ led_blink_cmd[3] = (*delay_on == 100)?IEI_LED_BLINK_5HZ:IEI_LED_BLINK_1HZ;
++
++ ret = iei_wt61p803_puzzle_write_command(priv->mcu, led_blink_cmd,
++ sizeof(led_blink_cmd),
++ resp_buf,
++ &reply_size);
++
++ if (ret)
++ return ret;
++
++ if (reply_size != 3)
++ return -EIO;
++
++ if (!(resp_buf[0] == IEI_WT61P803_PUZZLE_CMD_HEADER_START &&
++ resp_buf[1] == IEI_WT61P803_PUZZLE_CMD_RESPONSE_OK &&
++ resp_buf[2] == IEI_WT61P803_PUZZLE_CHECKSUM_RESPONSE_OK))
++ return -EIO;
++
++ mutex_lock(&priv->lock);
++ priv->blinking = true;
++ mutex_unlock(&priv->lock);
++
++ return ret;
++}
++
++static int iei_wt61p803_puzzle_led_set_dt_default(struct led_classdev *cdev,
++ struct device_node *np)
++{
++ const char *state;
++ int ret = 0;
++
++ state = of_get_property(np, "default-state", NULL);
++ if (state) {
++ if (!strcmp(state, "on")) {
++ ret =
++ iei_wt61p803_puzzle_led_brightness_set_blocking(
++ cdev, cdev->max_brightness);
++ } else {
++ ret = iei_wt61p803_puzzle_led_brightness_set_blocking(
++ cdev, LED_OFF);
++ }
++ }
++
++ return ret;
++}
++
+ static int iei_wt61p803_puzzle_led_probe(struct platform_device *pdev)
+ {
+ struct device *dev = &pdev->dev;
++ struct device_node *np = dev_of_node(dev);
++ struct device_node *child;
+ struct iei_wt61p803_puzzle *mcu = dev_get_drvdata(dev->parent);
+ struct iei_wt61p803_puzzle_led *priv;
+- struct led_init_data init_data = {};
+- struct fwnode_handle *child;
+ int ret;
++ u32 reg;
+
+- if (device_get_child_node_count(dev) != 1)
++ if (device_get_child_node_count(dev) > IEI_LEDS_MAX)
+ return -EINVAL;
+
+- priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+- if (!priv)
+- return -ENOMEM;
+-
+- priv->mcu = mcu;
+- priv->led_power_state = 1;
+- mutex_init(&priv->lock);
+- dev_set_drvdata(dev, priv);
+-
+- child = device_get_next_child_node(dev, NULL);
+- init_data.fwnode = child;
+-
+- priv->cdev.brightness_set_blocking = iei_wt61p803_puzzle_led_brightness_set_blocking;
+- priv->cdev.brightness_get = iei_wt61p803_puzzle_led_brightness_get;
+- priv->cdev.max_brightness = 1;
++ for_each_available_child_of_node(np, child) {
++ struct led_init_data init_data = {};
+
+- ret = devm_led_classdev_register_ext(dev, &priv->cdev, &init_data);
+- if (ret)
+- dev_err(dev, "Could not register LED\n");
++ ret = of_property_read_u32(child, "reg", ®);
++ if (ret) {
++ dev_err(dev, "Failed to read led 'reg' property\n");
++ goto put_child_node;
++ }
++
++ if (reg > IEI_LEDS_MAX) {
++ dev_err(dev, "Invalid led reg %u\n", reg);
++ ret = -EINVAL;
++ goto put_child_node;
++ }
++
++ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
++ if (!priv) {
++ ret = -ENOMEM;
++ goto put_child_node;
++ }
++
++ mutex_init(&priv->lock);
++
++ dev_set_drvdata(dev, priv);
++
++ if (of_property_read_bool(child, "active-low"))
++ priv->active_low = true;
++
++ priv->mcu = mcu;
++ priv->id = reg;
++ priv->led_power_state = 1;
++ priv->blinking = false;
++ init_data.fwnode = of_fwnode_handle(child);
++
++ priv->cdev.brightness_set_blocking = iei_wt61p803_puzzle_led_brightness_set_blocking;
++ priv->cdev.brightness_get = iei_wt61p803_puzzle_led_brightness_get;
++ priv->cdev.blink_set = iei_wt61p803_puzzle_led_set_blink;
++
++ priv->cdev.max_brightness = 1;
++
++ ret = iei_wt61p803_puzzle_led_set_dt_default(&priv->cdev, child);
++ if (ret) {
++ dev_err(dev, "Could apply default from DT\n");
++ goto put_child_node;
++ }
++
++ ret = devm_led_classdev_register_ext(dev, &priv->cdev, &init_data);
++ if (ret) {
++ dev_err(dev, "Could not register LED\n");
++ goto put_child_node;
++ }
++ }
++
++ return ret;
+
+- fwnode_handle_put(child);
++put_child_node:
++ of_node_put(child);
+ return ret;
+ }
+
+--- a/include/linux/mfd/iei-wt61p803-puzzle.h
++++ b/include/linux/mfd/iei-wt61p803-puzzle.h
+@@ -36,7 +36,7 @@
+ #define IEI_WT61P803_PUZZLE_CMD_FUNCTION_OTHER_POWER_LOSS 0x41 /* A */
+
+ #define IEI_WT61P803_PUZZLE_CMD_LED 0x52 /* R */
+-#define IEI_WT61P803_PUZZLE_CMD_LED_POWER 0x31 /* 1 */
++#define IEI_WT61P803_PUZZLE_CMD_LED_SET(n) (0x30 | (n))
+
+ #define IEI_WT61P803_PUZZLE_CMD_TEMP 0x54 /* T */
+ #define IEI_WT61P803_PUZZLE_CMD_TEMP_ALL 0x41 /* A */
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