[PATCH 3/3] ARM: OMAP2+ PM: Add support for TPS62361
Tero Kristo
t-kristo at ti.com
Fri May 4 09:57:22 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]
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 | 247 ++++++++++++++++++++++++++++++++
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, 297 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 8141b76..a147f00 100644
--- a/arch/arm/mach-omap2/Kconfig
+++ b/arch/arm/mach-omap2/Kconfig
@@ -334,6 +334,7 @@ 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"
@@ -342,6 +343,7 @@ 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"
@@ -384,6 +386,13 @@ 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 49f92bc..58861a2 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -22,6 +22,7 @@ obj-y += mcbsp.o
endif
obj-$(CONFIG_TWL4030_CORE) += omap_twl.o
+obj-$(CONFIG_OMAP_TPS6236X) += omap_tps6236x.o
# SMP support ONLY available for OMAP4
obj-$(CONFIG_SMP) += omap-smp.o omap-headsmp.o
diff --git a/arch/arm/mach-omap2/board-4430sdp.c b/arch/arm/mach-omap2/board-4430sdp.c
index a39fc4b..58fbf64 100644
--- a/arch/arm/mach-omap2/board-4430sdp.c
+++ b/arch/arm/mach-omap2/board-4430sdp.c
@@ -63,6 +63,8 @@
#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),
@@ -958,6 +960,14 @@ 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,
+ OMAP_PIN_OFF_OUTPUT_HIGH, -1);
+ 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 d8c0e89..5b5a6bc 100644
--- a/arch/arm/mach-omap2/board-omap4panda.c
+++ b/arch/arm/mach-omap2/board-omap4panda.c
@@ -55,6 +55,7 @@
#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 int wl1271_gpios[] = {46, -1, -1};
@@ -572,6 +573,13 @@ 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,
+ OMAP_PIN_OFF_OUTPUT_HIGH, -1);
+ 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..84b07c2
--- /dev/null
+++ b/arch/arm/mach-omap2/omap_tps6236x.c
@@ -0,0 +1,247 @@
+/*
+ * 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
+
+#define MAX_VOLTAGE_RAMP_TPS6236X_UV 32000
+
+/*
+ * 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 DEF_SET_REG(VSEL0, VSEL1) (((VSEL1) << 1 | (VSEL0) << 0) & 0x3)
+#define REG_TPS6236X_SET_0 0x00
+#define REG_TPS6236X_SET_1 0x01
+#define REG_TPS6236X_SET_2 0x02
+#define REG_TPS6236X_SET_3 0x03
+#define REG_TPS6236X_CTRL 0x04
+#define REG_TPS6236X_TEMP 0x05
+#define REG_TPS6236X_RAMP_CTRL 0x06
+#define REG_TPS6236X_CHIP_ID0 0x08
+#define REG_TPS6236X_CHIP_ID1 0x09
+
+#define MODE_TPS6236X_AUTO_PFM_PWM 0x00
+#define MODE_TPS6236X_FORCE_PWM BIT(7)
+
+/* We use Auto PFM/PWM mode currently seems to have the best trade off */
+#define VOLTAGE_PFM_MODE_VAL MODE_TPS6236X_AUTO_PFM_PWM
+
+#define REG_TPS6236X_RAMP_CTRL_RMP_MASK (0x7 << 5)
+#define REG_TPS6236X_RAMP_CTRL_EN_DISC BIT(2)
+#define REG_TPS6236X_RAMP_CTRL_RAMP_PFM BIT(1)
+
+#define REG_TPS6236X_CTRL_PD_EN BIT(7)
+#define REG_TPS6236X_CTRL_PD_VSEL0 BIT(6)
+#define REG_TPS6236X_CTRL_PD_VSEL1 BIT(5)
+
+/* TWL usage */
+#define TWL6030_REG_SYSEN_CFG_GRP 0xB3
+#define TWL6030_BIT_APE_GRP BIT(0)
+
+/* Which register do we use by default? */
+static int __initdata default_reg = -1;
+
+/* Do we need to setup internal pullups? */
+static int __initdata pd_vsel0 = -1;
+static int __initdata pd_vsel1 = -1;
+
+static int __init _bd_setup(char *name, int gpio_vsel, int *pull, int *pd_vsel)
+{
+ int pull_dir;
+ int r;
+
+ if (gpio_vsel == -1) {
+ if (*pull != -1) {
+ *pd_vsel = (*pull == OMAP_PIN_OFF_OUTPUT_HIGH);
+ *pull = *pd_vsel;
+ } else {
+ *pull = 0;
+ }
+ return 0;
+ }
+
+ /* if we have a pull gpio, with bad dir, pull low */
+ if (*pull == -1 || (*pull != OMAP_PIN_OFF_OUTPUT_HIGH &&
+ *pull != OMAP_PIN_OFF_OUTPUT_LOW))
+ *pull = OMAP_PIN_OFF_OUTPUT_LOW;
+
+ r = omap_mux_init_gpio(gpio_vsel, *pull);
+ if (r) {
+ pr_err("%s: unable to mux gpio%d=%d\n", __func__,
+ gpio_vsel, r);
+ goto out;
+ }
+
+ pull_dir = (*pull == OMAP_PIN_OFF_OUTPUT_HIGH);
+ *pull = pull_dir;
+
+ r = gpio_request(gpio_vsel, name);
+ if (r) {
+ pr_err("%s: unable to req gpio%d=%d\n", __func__,
+ gpio_vsel, r);
+ goto out;
+ }
+ r = gpio_direction_output(gpio_vsel, pull_dir);
+ if (r) {
+ pr_err("%s: unable to pull[%d] gpio%d=%d\n", __func__,
+ gpio_vsel, pull_dir, 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,
+ .startup_time = 1000,
+ .shutdown_time = 1,
+ .vddmin = MIN_VOLTAGE_TPS62361_UV,
+ .vddmax = MAX_VOLTAGE_TPS62361_UV,
+ .volt_setup_time = 0,
+ .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
+ * @pull0: If using GPIO, provide mux mode OMAP_PIN_OFF_OUTPUT_[HIGH|LOW]
+ * else provide any internal pull required, -1 if unused.
+ * @pull1: If using GPIO, provide mux mode OMAP_PIN_OFF_OUTPUT_[HIGH|LOW]
+ * else provide any internal pull required, -1 if unused.
+ *
+ * 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.
+ *
+ * WARNING: for platforms using GPIO, be careful to provide MUX setting
+ * considering OFF mode configuration as well.
+ */
+int __init omap_tps6236x_board_setup(bool use_62361, int gpio_vsel0,
+ int gpio_vsel1, int pull0, int pull1)
+{
+ int r;
+
+ r = _bd_setup("tps6236x_vsel0", gpio_vsel0, &pull0, &pd_vsel0);
+ if (r)
+ goto out;
+ r = _bd_setup("tps6236x_vsel1", gpio_vsel1, &pull1, &pd_vsel1);
+ if (r) {
+ if (gpio_vsel0 != -1)
+ gpio_free(gpio_vsel0);
+ goto out;
+ }
+
+ default_reg = ((pull1 & 0x1) << 1) | (pull0 & 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 c8e418e..fef14df 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 2588e04..ec802d8 100644
--- a/arch/arm/mach-omap2/twl-common.c
+++ b/arch/arm/mach-omap2/twl-common.c
@@ -78,6 +78,7 @@ void __init omap_pmic_late_init(void)
return;
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 2f805a3..0655efc 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 pull0, int 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 54b959c..ac68a0e 100644
--- a/arch/arm/mach-omap2/voltage.h
+++ b/arch/arm/mach-omap2/voltage.h
@@ -138,6 +138,11 @@ struct omap_volt_data {
#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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