[PATCH 2/2] arm64: dts: ti: Add support for AM642 SK
Nishanth Menon
nm at ti.com
Thu Jan 21 10:36:22 EST 2021
On 20:09-20210121, Lokesh Vutla wrote:
> AM642 StarterKit (SK) board is a low cost, small form factor board
> designed for TI’s AM642 SoC. It supports the following interfaces:
> * 2 GB LPDDR4 RAM
> * x2 Gigabit Ethernet interfaces capable of working in switch and MAC mode
> * x1 USB 3.0 Type-A port
> * x1 UHS-1 capable µSD card slot
> * 2.4/5 GHz WLAN + Bluetooth 4.2 through WL1837
> * 512 Mbit OSPI flash
> * x2 UART through UART-USB bridge
> * XDS110 for onboard JTAG debug using USB
> * Temperature sensors, user push buttons and LEDs
> * 40-pin Raspberry Pi compatible GPIO header
> * 24-pin header for peripherals in MCU island (I2C, UART, SPI, IO)
> * 54-pin header for Programmable Realtime Unit (PRU) IO pins
> * Interface for remote automation (power and reset, boot mode change)
might be nice to state "power measurement and reset control"
>
> Add basic support for AM642 SK.
>
> Signed-off-by: Lokesh Vutla <lokeshvutla at ti.com>
> Signed-off-by: Kishon Vijay Abraham I <kishon at ti.com>
> Signed-off-by: Vignesh Raghavendra <vigneshr at ti.com>
> Signed-off-by: Sekhar Nori <nsekhar at ti.com>
> ---
> arch/arm64/boot/dts/ti/Makefile | 3 +-
> arch/arm64/boot/dts/ti/k3-am642-sk.dts | 145 +++++++++++++++++++++++++
> 2 files changed, 147 insertions(+), 1 deletion(-)
> create mode 100644 arch/arm64/boot/dts/ti/k3-am642-sk.dts
>
> diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
> index c687739e2bca..6aa642eb56d4 100644
> --- a/arch/arm64/boot/dts/ti/Makefile
> +++ b/arch/arm64/boot/dts/ti/Makefile
> @@ -12,4 +12,5 @@ dtb-$(CONFIG_ARCH_K3) += k3-j721e-common-proc-board.dtb
>
> dtb-$(CONFIG_ARCH_K3) += k3-j7200-common-proc-board.dtb
>
> -dtb-$(CONFIG_ARCH_K3) += k3-am642-evm.dtb
> +dtb-$(CONFIG_ARCH_K3) += k3-am642-evm.dtb \
> + k3-am642-sk.dtb
no please. Just:
+dtb-$(CONFIG_ARCH_K3) += k3-am642-sk.dtb
See arch/arm64/boot/dts/nvidia/Makefile for example.
> diff --git a/arch/arm64/boot/dts/ti/k3-am642-sk.dts b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
> new file mode 100644
> index 000000000000..5b473aaa225d
> --- /dev/null
> +++ b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
> @@ -0,0 +1,145 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2021 Texas Instruments Incorporated - https://www.ti.com/
> + */
> +
> +/dts-v1/;
> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include "k3-am642.dtsi"
> +
> +/ {
> + compatible = "ti,am642-evm", "ti,am642";
> + model = "Texas Instruments AM642 SK";
> +
> + chosen {
> + stdout-path = "serial2:115200n8";
> + bootargs = "console=ttyS2,115200n8 earlycon=ns16550a,mmio32,0x02800000";
> + };
> +
> + memory at 80000000 {
> + device_type = "memory";
> + /* 2G RAM */
> + reg = <0x00000000 0x80000000 0x00000000 0x80000000>;
> +
> + };
> +
> + reserved-memory {
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges;
> +
> + secure_ddr: optee at 9e800000 {
> + reg = <0x00 0x9e800000 0x00 0x01800000>; /* for OP-TEE */
> + alignment = <0x1000>;
> + no-map;
> + };
> + };
> +
> + vusb_main: fixed-regulator-vusb-main5v0 {
> + /* USB MAIN INPUT 5V DC */
> + compatible = "regulator-fixed";
> + regulator-name = "vusb_main5v0";
> + regulator-min-microvolt = <5000000>;
> + regulator-max-microvolt = <5000000>;
> + regulator-always-on;
> + regulator-boot-on;
> + };
> +
> + vcc_3v3_sys: fixedregulator-vcc-3v3-sys {
> + /* output of LP8733xx */
> + compatible = "regulator-fixed";
> + regulator-name = "vcc_3v3_sys";
> + regulator-min-microvolt = <3300000>;
> + regulator-max-microvolt = <3300000>;
> + vin-supply = <&vusb_main>;
> + regulator-always-on;
> + regulator-boot-on;
> + };
> +
> + vdd_mmc1: fixed-regulator-sd {
> + /* TPS2051BD */
> + compatible = "regulator-fixed";
> + regulator-name = "vdd_mmc1";
> + regulator-min-microvolt = <3300000>;
> + regulator-max-microvolt = <3300000>;
> + regulator-boot-on;
> + enable-active-high;
> + vin-supply = <&vcc_3v3_sys>;
> + gpio = <&exp1 3 GPIO_ACTIVE_HIGH>;
> + };
> +};
> +
> +&main_pmx0 {
> + main_mmc1_pins_default: main-mmc1-pins-default {
> + pinctrl-single,pins = <
> + AM64X_IOPAD(0x0294, PIN_INPUT, 0) /* (J19) MMC1_CMD */
> + AM64X_IOPAD(0x0290, PIN_INPUT, 0) /* (#N/A) MMC1_CLKLB */
> + AM64X_IOPAD(0x028c, PIN_INPUT, 0) /* (L20) MMC1_CLK */
> + AM64X_IOPAD(0x0288, PIN_INPUT, 0) /* (K21) MMC1_DAT0 */
> + AM64X_IOPAD(0x0284, PIN_INPUT, 0) /* (L21) MMC1_DAT1 */
> + AM64X_IOPAD(0x0280, PIN_INPUT, 0) /* (K19) MMC1_DAT2 */
> + AM64X_IOPAD(0x027c, PIN_INPUT, 0) /* (K18) MMC1_DAT3 */
> + AM64X_IOPAD(0x0298, PIN_INPUT, 0) /* (D19) MMC1_SDCD */
> + >;
> + };
> +
> + main_i2c1_pins_default: main-i2c1-pins-default {
> + pinctrl-single,pins = <
> + AM64X_IOPAD(0x0268, PIN_INPUT_PULLUP, 0) /* (C18) I2C1_SCL */
> + AM64X_IOPAD(0x026c, PIN_INPUT_PULLUP, 0) /* (B19) I2C1_SDA */
> + >;
> + };
> +};
> +
> +&main_uart1 {
> + /* main_uart1 is reserved for firmware usage */
> + status = "reserved";
> +};
> +
> +&main_uart2 {
> + status = "disabled";
> +};
> +
> +&main_uart3 {
> + status = "disabled";
> +};
> +
> +&main_uart4 {
> + status = "disabled";
> +};
> +
> +&main_uart5 {
> + status = "disabled";
> +};
> +
> +&main_uart6 {
> + status = "disabled";
> +};
I think disabling &mcu_uart0 and &mcu_uart1 might also be a good idea?
> +
> +&main_i2c1 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&main_i2c1_pins_default>;
> + clock-frequency = <400000>;
> +
> + exp1: gpio at 70 {
> + compatible = "nxp,pca9538";
> + reg = <0x70>;
> + gpio-controller;
> + #gpio-cells = <2>;
> + gpio-line-names = "GPIO_CPSW2_RST", "GPIO_CPSW1_RST",
> + "PRU_DETECT", "MMC1_SD_EN",
> + "VPP_LDO_EN", "RPI_PS_3V3_En",
> + "RPI_PS_5V0_En", "RPI_HAT_DETECT";
> + };
> +};
Disable main_i2c0, spi nodes, sdhci0 or are those nodes being used for
something else that will be fixedup in a follow on series?
> +
> +&sdhci1 {
> + /* SD/MMC */
> + vmmc-supply = <&vdd_mmc1>;
> + pinctrl-names = "default";
> + bus-width = <4>;
> + pinctrl-0 = <&main_mmc1_pins_default>;
> + ti,driver-strength-ohm = <50>;
> + disable-wp;
> +};
> --
> 2.30.0
>
--
Regards,
Nishanth Menon
Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3 1A34 DDB5 849D 1736 249D
More information about the linux-arm-kernel
mailing list