[PATCHv7 20/21] ARM: OMAP2+ PM: Add support for TPS62361
Tero Kristo
t-kristo at ti.com
Tue Sep 25 12:33:52 EDT 2012
From: Vishwanath BS <vishwanath.bs at ti.com>
TPS62361 is a new PMIC used with OMAP4460 on SDP4430 platform
and panda board ES to supply MPU VDD.
Rest of the VDDs continue to be supplied via TWL6030.
As part of this, the following have been moved to common
location in voltage.h
OMAP4_VP_CONFIG_ERROROFFSET, OMAP4_VP_VSTEPMIN_VSTEPMIN,
OMAP4_VP_VSTEPMAX_VSTEPMAX, OMAP4_VP_VLIMITTO_TIMEOUT_US
[nm at ti.com: cleaned up TPS to handle board variations]
Signed-off-by: Nishanth Menon <nm at ti.com>
Signed-off-by: Vishwanath BS <vishwanath.bs at ti.com>
[t-kristo at ti.com: minor cleanup, added panda board support, dropped
some unused code from the patch]
Signed-off-by: Tero Kristo <t-kristo at ti.com>
---
arch/arm/mach-omap2/Kconfig | 9 ++
arch/arm/mach-omap2/Makefile | 1 +
arch/arm/mach-omap2/board-4430sdp.c | 10 ++
arch/arm/mach-omap2/board-omap4panda.c | 8 ++
arch/arm/mach-omap2/omap_tps6236x.c | 214 ++++++++++++++++++++++++++++++++
arch/arm/mach-omap2/omap_twl.c | 5 -
arch/arm/mach-omap2/twl-common.c | 1 +
arch/arm/mach-omap2/twl-common.h | 16 +++
arch/arm/mach-omap2/voltage.h | 5 +
9 files changed, 264 insertions(+), 5 deletions(-)
create mode 100644 arch/arm/mach-omap2/omap_tps6236x.c
diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
index fcd4e85..be65336 100644
--- a/arch/arm/mach-omap2/Kconfig
+++ b/arch/arm/mach-omap2/Kconfig
@@ -352,6 +352,7 @@ config MACH_OMAP_4430SDP
select OMAP_PACKAGE_CBL
select OMAP_PACKAGE_CBS
select REGULATOR_FIXED_VOLTAGE if REGULATOR
+ select OMAP_TPS6236X
config MACH_OMAP4_PANDA
bool "OMAP4 Panda Board"
@@ -360,6 +361,7 @@ config MACH_OMAP4_PANDA
select OMAP_PACKAGE_CBL
select OMAP_PACKAGE_CBS
select REGULATOR_FIXED_VOLTAGE if REGULATOR
+ select OMAP_TPS6236X
config OMAP3_EMU
bool "OMAP3 debugging peripherals"
@@ -402,6 +404,13 @@ config OMAP4_ERRATA_I688
In MPU case, L3 T2ASYNC FIFO and DDR T2ASYNC FIFO needs to be drained.
IO barrier ensure that there is no synchronisation loss on initiators
operating on both interconnect port simultaneously.
+
+config OMAP_TPS6236X
+ bool "OMAP4 support for TPS6236X power IC"
+ help
+ TPS62361 is a PMIC used with OMAP4460 to supply MPU VDD voltage.
+ Rest of the VDDs continue to be supplied via TWL6030.
+
endmenu
endif
diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index f6a24b3..0e183a1 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -24,6 +24,7 @@ obj-y += mcbsp.o
endif
obj-$(CONFIG_TWL4030_CORE) += omap_twl.o
+obj-$(CONFIG_OMAP_TPS6236X) += omap_tps6236x.o
obj-$(CONFIG_SOC_HAS_OMAP2_SDRC) += sdrc.o
# SMP support ONLY available for OMAP4
diff --git a/arch/arm/mach-omap2/board-4430sdp.c b/arch/arm/mach-omap2/board-4430sdp.c
index ad8a7d9..bebef07 100644
--- a/arch/arm/mach-omap2/board-4430sdp.c
+++ b/arch/arm/mach-omap2/board-4430sdp.c
@@ -64,6 +64,8 @@
#define GPIO_WIFI_PMENA 54
#define GPIO_WIFI_IRQ 53
+#define TPS62361_GPIO 7
+
static const int sdp4430_keymap[] = {
KEY(0, 0, KEY_E),
KEY(0, 1, KEY_R),
@@ -904,6 +906,14 @@ static void __init omap_4430sdp_init(void)
pr_err("Keypad initialization failed: %d\n", status);
omap_4430sdp_display_init();
+
+ if (cpu_is_omap446x()) {
+ /* Vsel0 = gpio, vsel1 = gnd */
+ status = omap_tps6236x_board_setup(true, TPS62361_GPIO, -1,
+ -1, 0);
+ if (status)
+ pr_err("TPS62361 initialization failed: %d\n", status);
+ }
}
MACHINE_START(OMAP_4430SDP, "OMAP4430 4430SDP board")
diff --git a/arch/arm/mach-omap2/board-omap4panda.c b/arch/arm/mach-omap2/board-omap4panda.c
index 70f6d1d..57431e0 100644
--- a/arch/arm/mach-omap2/board-omap4panda.c
+++ b/arch/arm/mach-omap2/board-omap4panda.c
@@ -57,6 +57,7 @@
#define HDMI_GPIO_CT_CP_HPD 60 /* HPD mode enable/disable */
#define HDMI_GPIO_LS_OE 41 /* Level shifter for HDMI */
#define HDMI_GPIO_HPD 63 /* Hotplug detect */
+#define TPS62361_GPIO 7 /* Vsel0 control for TPS62361 */
/* wl127x BT, FM, GPS connectivity chip */
static struct ti_st_plat_data wilink_platform_data = {
@@ -513,6 +514,13 @@ static void __init omap4_panda_init(void)
omap4_ehci_init();
usb_musb_init(&musb_board_data);
omap4_panda_display_init();
+ if (cpu_is_omap446x()) {
+ /* vsel0 = gpio, vsel1 = gnd */
+ ret = omap_tps6236x_board_setup(true, TPS62361_GPIO, -1,
+ -1, 0);
+ if (ret)
+ pr_err("TPS62361 initialization failed: %d\n", ret);
+ }
}
MACHINE_START(OMAP4_PANDA, "OMAP4 Panda board")
diff --git a/arch/arm/mach-omap2/omap_tps6236x.c b/arch/arm/mach-omap2/omap_tps6236x.c
new file mode 100644
index 0000000..6564f3d
--- /dev/null
+++ b/arch/arm/mach-omap2/omap_tps6236x.c
@@ -0,0 +1,214 @@
+/*
+ * OMAP and TPS6236x specific initialization
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
+ * Vishwanath BS
+ * Nishanth Menon
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/gpio.h>
+#include <linux/i2c/twl.h>
+
+#include "pm.h"
+#include "vc.h"
+#include "mux.h"
+#include "twl-common.h"
+
+/* Voltage limits supported */
+#define MIN_VOLTAGE_TPS62360_62_UV 770000
+#define MAX_VOLTAGE_TPS62360_62_UV 1400000
+
+#define MIN_VOLTAGE_TPS62361_UV 500000
+#define MAX_VOLTAGE_TPS62361_UV 1770000
+
+/*
+ * This is the voltage delta between 2 values in voltage register.
+ * when switching voltage V1 to V2, TPS62361 can ramp up or down
+ * initially with step sizes of 20mV with a last step of 10mV.
+ * In the case of TPS6236[0|2], it is a constant 10mV steps
+ * we choose the 10mV step for linearity when SR is configured.
+ */
+#define STEP_SIZE_TPS6236X 10000
+
+/* I2C access parameters */
+#define I2C_TPS6236X_SLAVE_ADDR 0x60
+
+#define REG_TPS6236X_SET_0 0x00
+
+#define MODE_TPS6236X_AUTO_PFM_PWM 0x00
+
+/* We use Auto PFM/PWM mode currently seems to have the best trade off */
+#define VOLTAGE_PFM_MODE_VAL MODE_TPS6236X_AUTO_PFM_PWM
+
+/* Which register do we use by default? */
+static int __initdata default_reg = -1;
+
+/**
+ * _bd_setup - sets up single GPIO line for configuring PMIC
+ * @name: driver name
+ * @gpio_vsel: GPIO used for controlling PMIC VSEL signal
+ * @hw_pull: hardware pull setup
+ *
+ * Sets up a single GPIO line for configuring TPS6236X PMIC. This selects
+ * the I2C register address that is used for voltage control. If a GPIO is
+ * provided, it is always driven to low.
+ */
+static int __init _bd_setup(char *name, int gpio_vsel, int hw_pull)
+{
+ int r;
+
+ /* If hardwired, do not touch GPIO */
+ if (hw_pull != -1)
+ return 0;
+
+ r = omap_mux_init_gpio(gpio_vsel, OMAP_PIN_OUTPUT);
+ if (r) {
+ pr_err("%s: unable to mux gpio%d=%d\n", __func__,
+ gpio_vsel, r);
+ goto out;
+ }
+
+ r = gpio_request(gpio_vsel, name);
+ if (r) {
+ pr_err("%s: unable to req gpio%d=%d\n", __func__,
+ gpio_vsel, r);
+ goto out;
+ }
+
+ /* Drive gpio to 0 */
+ r = gpio_direction_output(gpio_vsel, 0);
+ if (r) {
+ pr_err("%s: unable to drive gpio%d=%d\n", __func__,
+ gpio_vsel, r);
+ gpio_free(gpio_vsel);
+ goto out;
+ }
+out:
+ return r;
+}
+
+static unsigned long tps6236x_vsel_to_uv(const u8 vsel);
+static u8 tps6236x_uv_to_vsel(unsigned long uv);
+
+static struct omap_voltdm_pmic omap4_mpu_pmic = {
+ .slew_rate = 8000,
+ .step_size = STEP_SIZE_TPS6236X,
+ .vddmin = MIN_VOLTAGE_TPS62361_UV,
+ .vddmax = MAX_VOLTAGE_TPS62361_UV,
+ .vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET,
+ .vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN,
+ .vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX,
+ .vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US,
+ .i2c_slave_addr = I2C_TPS6236X_SLAVE_ADDR,
+ .volt_reg_addr = REG_TPS6236X_SET_0,
+ .cmd_reg_addr = REG_TPS6236X_SET_0,
+ .i2c_high_speed = true,
+ .vsel_to_uv = tps6236x_vsel_to_uv,
+ .uv_to_vsel = tps6236x_uv_to_vsel,
+};
+
+static unsigned long tps6236x_vsel_to_uv(const u8 vsel)
+{
+ return omap4_mpu_pmic.vddmin +
+ (STEP_SIZE_TPS6236X * (vsel & ~VOLTAGE_PFM_MODE_VAL));
+}
+
+static u8 tps6236x_uv_to_vsel(unsigned long uv)
+{
+ if (!uv)
+ return 0;
+
+ /* Round off requests to limits */
+ if (uv > omap4_mpu_pmic.vddmax) {
+ pr_err("%s:Request for overvoltage[%ld] than supported[%u]\n",
+ __func__, uv, omap4_mpu_pmic.vddmax);
+ uv = omap4_mpu_pmic.vddmax;
+ }
+ if (uv < omap4_mpu_pmic.vddmin) {
+ pr_err("%s:Request for undervoltage[%ld] than supported[%u]\n",
+ __func__, uv, omap4_mpu_pmic.vddmin);
+ uv = omap4_mpu_pmic.vddmin;
+ }
+ return DIV_ROUND_UP(uv - omap4_mpu_pmic.vddmin, STEP_SIZE_TPS6236X) |
+ VOLTAGE_PFM_MODE_VAL;
+}
+
+static __initdata struct omap_pmic_map omap_tps_map[] = {
+ {
+ .name = "mpu",
+ .cpu = PMIC_CPU_OMAP4460,
+ .pmic_data = &omap4_mpu_pmic,
+ },
+ /* Terminator */
+ { .name = NULL, .pmic_data = NULL},
+};
+
+int __init omap_tps6236x_init(void)
+{
+ struct omap_pmic_map *map;
+
+ /* Without registers, I wont proceed */
+ if (default_reg == -1)
+ return -EINVAL;
+
+ map = omap_tps_map;
+
+ /* setup all the pmic's voltage addresses to the default one */
+ while (map->name) {
+ map->pmic_data->volt_reg_addr = default_reg;
+ map->pmic_data->cmd_reg_addr = default_reg;
+ map++;
+ }
+
+ return omap_pmic_register_data(omap_tps_map);
+}
+
+/**
+ * omap_tps6236x_board_setup() - provide the board config for TPS connect
+ * @use_62361: Do we use TPS62361 variant?
+ * @gpio_vsel0: If using GPIO to control VSEL0, provide gpio number, else -1
+ * @gpio_vsel1: If using GPIO to control VSEL1, provide gpio number, else -1
+ * @hw_pull0: If not using gpio, provide hardware pull for the pin (high=1)
+ * @hw_pull1: If not using gpio, provide hardware pull for the pin (high=1)
+ *
+ * TPS6236x variants of PMIC can be hooked in numerous combinations on to the
+ * board. Some platforms can choose to hardwire and save on a GPIO for other
+ * uses, while others may hook a single line for GPIO control and may ground
+ * the other line. support these configurations.
+ */
+int __init omap_tps6236x_board_setup(bool use_62361, int gpio_vsel0,
+ int gpio_vsel1, int hw_pull0, int hw_pull1)
+{
+ int r;
+ int vsel0 = 0, vsel1 = 0;
+
+ r = _bd_setup("tps6236x_vsel0", gpio_vsel0, hw_pull0);
+ if (r)
+ goto out;
+ r = _bd_setup("tps6236x_vsel1", gpio_vsel1, hw_pull1);
+ if (r) {
+ if (gpio_vsel0 != -1)
+ gpio_free(gpio_vsel0);
+ goto out;
+ }
+
+ if (hw_pull0 != -1)
+ vsel0 = hw_pull0;
+ if (hw_pull1 != -1)
+ vsel1 = hw_pull1;
+
+ default_reg = ((vsel1 & 0x1) << 1) | (vsel0 & 0x1);
+
+ if (!use_62361) {
+ omap4_mpu_pmic.vddmin = MIN_VOLTAGE_TPS62360_62_UV;
+ omap4_mpu_pmic.vddmax = MAX_VOLTAGE_TPS62360_62_UV;
+ }
+out:
+ return r;
+}
diff --git a/arch/arm/mach-omap2/omap_twl.c b/arch/arm/mach-omap2/omap_twl.c
index f6ee038..885e8ab 100644
--- a/arch/arm/mach-omap2/omap_twl.c
+++ b/arch/arm/mach-omap2/omap_twl.c
@@ -38,11 +38,6 @@
#define OMAP4_VDD_CORE_SR_VOLT_REG 0x61
#define OMAP4_VDD_CORE_SR_CMD_REG 0x62
-#define OMAP4_VP_CONFIG_ERROROFFSET 0x00
-#define OMAP4_VP_VSTEPMIN_VSTEPMIN 0x01
-#define OMAP4_VP_VSTEPMAX_VSTEPMAX 0x04
-#define OMAP4_VP_VLIMITTO_TIMEOUT_US 200
-
static bool is_offset_valid;
static u8 smps_offset;
/*
diff --git a/arch/arm/mach-omap2/twl-common.c b/arch/arm/mach-omap2/twl-common.c
index 4a9ca89..06f6f77 100644
--- a/arch/arm/mach-omap2/twl-common.c
+++ b/arch/arm/mach-omap2/twl-common.c
@@ -98,6 +98,7 @@ void __init omap4_pmic_init(const char *pmic_type,
void __init omap_pmic_late_init(void)
{
omap_twl_init();
+ omap_tps6236x_init();
}
#if defined(CONFIG_ARCH_OMAP3)
diff --git a/arch/arm/mach-omap2/twl-common.h b/arch/arm/mach-omap2/twl-common.h
index c501b55..61dc3cb 100644
--- a/arch/arm/mach-omap2/twl-common.h
+++ b/arch/arm/mach-omap2/twl-common.h
@@ -86,4 +86,20 @@ struct omap_pmic_map {
extern int omap_pmic_register_data(struct omap_pmic_map *map);
extern void omap_pmic_data_init(void);
+#ifdef CONFIG_OMAP_TPS6236X
+extern int omap_tps6236x_board_setup(bool use_62361, int gpio_vsel0,
+ int gpio_vsel1, int hw_pull0, int hw_pull1);
+extern int omap_tps6236x_init(void);
+#else
+static inline int omap_tps6236x_board_setup(bool use_62361, int gpio_vsel0,
+ int gpio_vsel1, int pull0, int pull1)
+{
+ return -EINVAL;
+}
+static inline int omap_tps6236x_init(void)
+{
+ return -EINVAL;
+}
+#endif
+
#endif /* __OMAP_PMIC_COMMON__ */
diff --git a/arch/arm/mach-omap2/voltage.h b/arch/arm/mach-omap2/voltage.h
index d51bcd1..5238dfd 100644
--- a/arch/arm/mach-omap2/voltage.h
+++ b/arch/arm/mach-omap2/voltage.h
@@ -125,6 +125,11 @@ struct voltagedomain {
#define OMAP4_VP_CORE_VLIMITTO_VDDMIN 830000
#define OMAP4_VP_CORE_VLIMITTO_VDDMAX 1200000
+#define OMAP4_VP_CONFIG_ERROROFFSET 0x00
+#define OMAP4_VP_VSTEPMIN_VSTEPMIN 0x01
+#define OMAP4_VP_VSTEPMAX_VSTEPMAX 0x04
+#define OMAP4_VP_VLIMITTO_TIMEOUT_US 200
+
/**
* struct omap_voltdm_pmic - PMIC specific data required by voltage driver.
* @slew_rate: PMIC slew rate (in uv/us)
--
1.7.4.1
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