[PATCH V4] regulator: tps6586x: add support for SYS rail
From: Stephen Warren
Date: Tue Sep 04 2012 - 16:43:42 EST
From: Laxman Dewangan <ldewangan@xxxxxxxxxx>
Device have SYS rail which is always ON. It is system power bus. LDO5
and LDO_RTC get powered through this rail internally. Add support for
this rail and make the LDO5/LDO_RTC supply by it. Update document
accordingly.
[swarren: Instantiate the sys regulator from board-harmony-power.c to
avoid regression.]
Signed-off-by: Laxman Dewangan <ldewangan@xxxxxxxxxx>
Signed-off-by: Stephen Warren <swarren@xxxxxxxxxx>
---
Mark, this patch is based on v3.6-rc3. As we discussed, lets put this into
a TPS6586x driver topic branch in the regulator tree, so that I can merge
it into the Tegra tree for the regulator DT conversion. Note that Laxman
posted patch "regulator: tps6586x: register regulator even if no init data"
which depends on this patch, so I guess they should both go through the
topic branch.
.../devicetree/bindings/regulator/tps6586x.txt | 65 ++++++++++++--------
arch/arm/mach-tegra/board-harmony-power.c | 12 +++-
drivers/mfd/tps6586x.c | 13 ++++
drivers/regulator/tps6586x-regulator.c | 20 ++++++-
include/linux/mfd/tps6586x.h | 1 +
5 files changed, 81 insertions(+), 30 deletions(-)
diff --git a/Documentation/devicetree/bindings/regulator/tps6586x.txt b/Documentation/devicetree/bindings/regulator/tps6586x.txt
index da80c2a..a2436e1 100644
--- a/Documentation/devicetree/bindings/regulator/tps6586x.txt
+++ b/Documentation/devicetree/bindings/regulator/tps6586x.txt
@@ -8,7 +8,8 @@ Required properties:
- gpio-controller: mark the device as a GPIO controller
- regulators: list of regulators provided by this controller, must have
property "regulator-compatible" to match their hardware counterparts:
- sm[0-2], ldo[0-9] and ldo_rtc
+ sys, sm[0-2], ldo[0-9] and ldo_rtc
+- sys-supply: The input supply for SYS.
- vin-sm0-supply: The input supply for the SM0.
- vin-sm1-supply: The input supply for the SM1.
- vin-sm2-supply: The input supply for the SM2.
@@ -20,6 +21,9 @@ Required properties:
Each regulator is defined using the standard binding for regulators.
+Note: LDO5 and LDO_RTC is supplied by SYS regulator internally and driver
+ take care of making proper parent child relationship.
+
Example:
pmu: tps6586x@34 {
@@ -30,6 +34,7 @@ Example:
#gpio-cells = <2>;
gpio-controller;
+ sys-supply = <&some_reg>;
vin-sm0-supply = <&some_reg>;
vin-sm1-supply = <&some_reg>;
vin-sm2-supply = <&some_reg>;
@@ -43,8 +48,16 @@ Example:
#address-cells = <1>;
#size-cells = <0>;
- sm0_reg: regulator@0 {
+ sys_reg: regulator@0 {
reg = <0>;
+ regulator-compatible = "sys";
+ regulator-name = "vdd_sys";
+ regulator-boot-on;
+ regulator-always-on;
+ };
+
+ sm0_reg: regulator@1 {
+ reg = <1>;
regulator-compatible = "sm0";
regulator-min-microvolt = < 725000>;
regulator-max-microvolt = <1500000>;
@@ -52,8 +65,8 @@ Example:
regulator-always-on;
};
- sm1_reg: regulator@1 {
- reg = <1>;
+ sm1_reg: regulator@2 {
+ reg = <2>;
regulator-compatible = "sm1";
regulator-min-microvolt = < 725000>;
regulator-max-microvolt = <1500000>;
@@ -61,8 +74,8 @@ Example:
regulator-always-on;
};
- sm2_reg: regulator@2 {
- reg = <2>;
+ sm2_reg: regulator@3 {
+ reg = <3>;
regulator-compatible = "sm2";
regulator-min-microvolt = <3000000>;
regulator-max-microvolt = <4550000>;
@@ -70,72 +83,72 @@ Example:
regulator-always-on;
};
- ldo0_reg: regulator@3 {
- reg = <3>;
+ ldo0_reg: regulator@4 {
+ reg = <4>;
regulator-compatible = "ldo0";
regulator-name = "PCIE CLK";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
};
- ldo1_reg: regulator@4 {
- reg = <4>;
+ ldo1_reg: regulator@5 {
+ reg = <5>;
regulator-compatible = "ldo1";
regulator-min-microvolt = < 725000>;
regulator-max-microvolt = <1500000>;
};
- ldo2_reg: regulator@5 {
- reg = <5>;
+ ldo2_reg: regulator@6 {
+ reg = <6>;
regulator-compatible = "ldo2";
regulator-min-microvolt = < 725000>;
regulator-max-microvolt = <1500000>;
};
- ldo3_reg: regulator@6 {
- reg = <6>;
+ ldo3_reg: regulator@7 {
+ reg = <7>;
regulator-compatible = "ldo3";
regulator-min-microvolt = <1250000>;
regulator-max-microvolt = <3300000>;
};
- ldo4_reg: regulator@7 {
- reg = <7>;
+ ldo4_reg: regulator@8 {
+ reg = <8>;
regulator-compatible = "ldo4";
regulator-min-microvolt = <1700000>;
regulator-max-microvolt = <2475000>;
};
- ldo5_reg: regulator@8 {
- reg = <8>;
+ ldo5_reg: regulator@9 {
+ reg = <9>;
regulator-compatible = "ldo5";
regulator-min-microvolt = <1250000>;
regulator-max-microvolt = <3300000>;
};
- ldo6_reg: regulator@9 {
- reg = <9>;
+ ldo6_reg: regulator@10 {
+ reg = <10>;
regulator-compatible = "ldo6";
regulator-min-microvolt = <1250000>;
regulator-max-microvolt = <3300000>;
};
- ldo7_reg: regulator@10 {
- reg = <10>;
+ ldo7_reg: regulator@11 {
+ reg = <11>;
regulator-compatible = "ldo7";
regulator-min-microvolt = <1250000>;
regulator-max-microvolt = <3300000>;
};
- ldo8_reg: regulator@11 {
- reg = <11>;
+ ldo8_reg: regulator@12 {
+ reg = <12>;
regulator-compatible = "ldo8";
regulator-min-microvolt = <1250000>;
regulator-max-microvolt = <3300000>;
};
- ldo9_reg: regulator@12 {
- reg = <12>;
+ ldo9_reg: regulator@13 {
+ reg = <13>;
regulator-compatible = "ldo9";
regulator-min-microvolt = <1250000>;
regulator-max-microvolt = <3300000>;
diff --git a/arch/arm/mach-tegra/board-harmony-power.c b/arch/arm/mach-tegra/board-harmony-power.c
index b7344be..94486e7 100644
--- a/arch/arm/mach-tegra/board-harmony-power.c
+++ b/arch/arm/mach-tegra/board-harmony-power.c
@@ -67,6 +67,13 @@ static struct regulator_init_data ldo0_data = {
}, \
}
+static struct regulator_init_data sys_data = {
+ .supply_regulator = "vdd_5v0",
+ .constraints = {
+ .name = "vdd_sys",
+ },
+};
+
HARMONY_REGULATOR_INIT(sm0, "vdd_sm0", "vdd_sys", 725, 1500, 1);
HARMONY_REGULATOR_INIT(sm1, "vdd_sm1", "vdd_sys", 725, 1500, 1);
HARMONY_REGULATOR_INIT(sm2, "vdd_sm2", "vdd_sys", 3000, 4550, 1);
@@ -74,7 +81,7 @@ HARMONY_REGULATOR_INIT(ldo1, "vdd_ldo1", "vdd_sm2", 725, 1500, 1);
HARMONY_REGULATOR_INIT(ldo2, "vdd_ldo2", "vdd_sm2", 725, 1500, 0);
HARMONY_REGULATOR_INIT(ldo3, "vdd_ldo3", "vdd_sm2", 1250, 3300, 1);
HARMONY_REGULATOR_INIT(ldo4, "vdd_ldo4", "vdd_sm2", 1700, 2475, 1);
-HARMONY_REGULATOR_INIT(ldo5, "vdd_ldo5", NULL, 1250, 3300, 1);
+HARMONY_REGULATOR_INIT(ldo5, "vdd_ldo5", "vdd_sys", 1250, 3300, 1);
HARMONY_REGULATOR_INIT(ldo6, "vdd_ldo6", "vdd_sm2", 1250, 3300, 0);
HARMONY_REGULATOR_INIT(ldo7, "vdd_ldo7", "vdd_sm2", 1250, 3300, 0);
HARMONY_REGULATOR_INIT(ldo8, "vdd_ldo8", "vdd_sm2", 1250, 3300, 0);
@@ -88,6 +95,7 @@ HARMONY_REGULATOR_INIT(ldo9, "vdd_ldo9", "vdd_sm2", 1250, 3300, 1);
}
static struct tps6586x_subdev_info tps_devs[] = {
+ TPS_REG(SYS, &sys_data),
TPS_REG(SM_0, &sm0_data),
TPS_REG(SM_1, &sm1_data),
TPS_REG(SM_2, &sm2_data),
@@ -120,7 +128,7 @@ static struct i2c_board_info __initdata harmony_regulators[] = {
int __init harmony_regulator_init(void)
{
- regulator_register_always_on(0, "vdd_sys",
+ regulator_register_always_on(0, "vdd_5v0",
NULL, 0, 5000000);
if (machine_is_harmony()) {
diff --git a/drivers/mfd/tps6586x.c b/drivers/mfd/tps6586x.c
index 353c348..380a3c8 100644
--- a/drivers/mfd/tps6586x.c
+++ b/drivers/mfd/tps6586x.c
@@ -25,6 +25,7 @@
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <linux/regulator/of_regulator.h>
+#include <linux/regulator/machine.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tps6586x.h>
@@ -346,6 +347,7 @@ failed:
#ifdef CONFIG_OF
static struct of_regulator_match tps6586x_matches[] = {
+ { .name = "sys", .driver_data = (void *)TPS6586X_ID_SYS },
{ .name = "sm0", .driver_data = (void *)TPS6586X_ID_SM_0 },
{ .name = "sm1", .driver_data = (void *)TPS6586X_ID_SM_1 },
{ .name = "sm2", .driver_data = (void *)TPS6586X_ID_SM_2 },
@@ -369,6 +371,7 @@ static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *clien
struct tps6586x_platform_data *pdata;
struct tps6586x_subdev_info *devs;
struct device_node *regs;
+ const char *sys_rail_name = NULL;
unsigned int count;
unsigned int i, j;
int err;
@@ -391,12 +394,22 @@ static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *clien
return NULL;
for (i = 0, j = 0; i < num && j < count; i++) {
+ struct regulator_init_data *reg_idata;
+
if (!tps6586x_matches[i].init_data)
continue;
+ reg_idata = tps6586x_matches[i].init_data;
devs[j].name = "tps6586x-regulator";
devs[j].platform_data = tps6586x_matches[i].init_data;
devs[j].id = (int)tps6586x_matches[i].driver_data;
+ if (devs[j].id == TPS6586X_ID_SYS)
+ sys_rail_name = reg_idata->constraints.name;
+
+ if ((devs[j].id == TPS6586X_ID_LDO_5) ||
+ (devs[j].id == TPS6586X_ID_LDO_RTC))
+ reg_idata->supply_regulator = sys_rail_name;
+
devs[j].of_node = tps6586x_matches[i].of_node;
j++;
}
diff --git a/drivers/regulator/tps6586x-regulator.c b/drivers/regulator/tps6586x-regulator.c
index 19241fc..8212526 100644
--- a/drivers/regulator/tps6586x-regulator.c
+++ b/drivers/regulator/tps6586x-regulator.c
@@ -162,6 +162,9 @@ static struct regulator_ops tps6586x_regulator_ops = {
.disable = tps6586x_regulator_disable,
};
+static struct regulator_ops tps6586x_sys_regulator_ops = {
+};
+
static const unsigned int tps6586x_ldo0_voltages[] = {
1200000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000,
};
@@ -230,15 +233,28 @@ static const unsigned int tps6586x_dvm_voltages[] = {
TPS6586X_REGULATOR_DVM_GOREG(goreg, gobit) \
}
+#define TPS6586X_SYS_REGULATOR() \
+{ \
+ .desc = { \
+ .supply_name = "sys", \
+ .name = "REG-SYS", \
+ .ops = &tps6586x_sys_regulator_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .id = TPS6586X_ID_SYS, \
+ .owner = THIS_MODULE, \
+ }, \
+}
+
static struct tps6586x_regulator tps6586x_regulator[] = {
+ TPS6586X_SYS_REGULATOR(),
TPS6586X_LDO(LDO_0, "vinldo01", ldo0, SUPPLYV1, 5, 3, ENC, 0, END, 0),
TPS6586X_LDO(LDO_3, "vinldo23", ldo, SUPPLYV4, 0, 3, ENC, 2, END, 2),
- TPS6586X_LDO(LDO_5, NULL, ldo, SUPPLYV6, 0, 3, ENE, 6, ENE, 6),
+ TPS6586X_LDO(LDO_5, "REG-SYS", ldo, SUPPLYV6, 0, 3, ENE, 6, ENE, 6),
TPS6586X_LDO(LDO_6, "vinldo678", ldo, SUPPLYV3, 0, 3, ENC, 4, END, 4),
TPS6586X_LDO(LDO_7, "vinldo678", ldo, SUPPLYV3, 3, 3, ENC, 5, END, 5),
TPS6586X_LDO(LDO_8, "vinldo678", ldo, SUPPLYV2, 5, 3, ENC, 6, END, 6),
TPS6586X_LDO(LDO_9, "vinldo9", ldo, SUPPLYV6, 3, 3, ENE, 7, ENE, 7),
- TPS6586X_LDO(LDO_RTC, NULL, ldo, SUPPLYV4, 3, 3, V4, 7, V4, 7),
+ TPS6586X_LDO(LDO_RTC, "REG-SYS", ldo, SUPPLYV4, 3, 3, V4, 7, V4, 7),
TPS6586X_LDO(LDO_1, "vinldo01", dvm, SUPPLYV1, 0, 5, ENC, 1, END, 1),
TPS6586X_LDO(SM_2, "vin-sm2", sm2, SUPPLYV2, 0, 5, ENC, 7, END, 7),
diff --git a/include/linux/mfd/tps6586x.h b/include/linux/mfd/tps6586x.h
index f350fd0..9451471 100644
--- a/include/linux/mfd/tps6586x.h
+++ b/include/linux/mfd/tps6586x.h
@@ -14,6 +14,7 @@
#define TPS6586X_SLEW_RATE_MASK 0x07
enum {
+ TPS6586X_ID_SYS,
TPS6586X_ID_SM_0,
TPS6586X_ID_SM_1,
TPS6586X_ID_SM_2,
--
1.7.0.4
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/