diff options
| author | Bill Huang <bilhuang@nvidia.com> | 2012-08-19 18:07:55 -0700 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2012-09-14 09:52:14 +0200 |
| commit | 004c15a68076f5bdc343bed92efed81087cecbfb (patch) | |
| tree | 719632562fd71bf6ec24cd0e9a72afbeda8ff6a6 | |
| parent | 80633f05b0dbf5819ef28f626f2f0b7c885d1f88 (diff) | |
| download | linux-stable-004c15a68076f5bdc343bed92efed81087cecbfb.tar.gz linux-stable-004c15a68076f5bdc343bed92efed81087cecbfb.tar.bz2 linux-stable-004c15a68076f5bdc343bed92efed81087cecbfb.zip | |
mfd: dt: tps6586x: Add power off control
Add DT property "ti,system-power-controller" telling whether or not this
pmic is in charge of controlling the system power, so the power off
routine can be hooked up to system call "pm_power_off".
Based on the work by:
Dan Willemsen <dwillemsen@nvidia.com>
Signed-off-by: Bill Huang <bilhuang@nvidia.com>
Tested-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
| -rw-r--r-- | Documentation/devicetree/bindings/regulator/tps6586x.txt | 6 | ||||
| -rw-r--r-- | drivers/mfd/tps6586x.c | 19 | ||||
| -rw-r--r-- | include/linux/mfd/tps6586x.h | 1 |
3 files changed, 26 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/regulator/tps6586x.txt b/Documentation/devicetree/bindings/regulator/tps6586x.txt index d156e1b5db12..03dfa4e0aa75 100644 --- a/Documentation/devicetree/bindings/regulator/tps6586x.txt +++ b/Documentation/devicetree/bindings/regulator/tps6586x.txt @@ -18,6 +18,10 @@ Required properties: - vinldo678-supply: The input supply for the LDO6, LDO7 and LDO8 - vinldo9-supply: The input supply for the LDO9 +Optional properties: +- ti,system-power-controller: Telling whether or not this pmic is controlling + the system power. + Each regulator is defined using the standard binding for regulators. Example: @@ -30,6 +34,8 @@ Example: #gpio-cells = <2>; gpio-controller; + ti,system-power-controller; + sm0-supply = <&some_reg>; sm1-supply = <&some_reg>; sm2-supply = <&some_reg>; diff --git a/drivers/mfd/tps6586x.c b/drivers/mfd/tps6586x.c index 5f58370ccf55..95ef40754dd7 100644 --- a/drivers/mfd/tps6586x.c +++ b/drivers/mfd/tps6586x.c @@ -29,6 +29,10 @@ #include <linux/mfd/core.h> #include <linux/mfd/tps6586x.h> +#define TPS6586X_SUPPLYENE 0x14 +#define EXITSLREQ_BIT BIT(1) +#define SLEEP_MODE_BIT BIT(3) + /* interrupt control registers */ #define TPS6586X_INT_ACK1 0xb5 #define TPS6586X_INT_ACK2 0xb6 @@ -409,6 +413,7 @@ static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *clien pdata->subdevs = devs; pdata->gpio_base = -1; pdata->irq_base = -1; + pdata->pm_off = of_property_read_bool(np, "ti,system-power-controller"); return pdata; } @@ -441,6 +446,15 @@ static const struct regmap_config tps6586x_regmap_config = { .cache_type = REGCACHE_RBTREE, }; +static struct device *tps6586x_dev; +static void tps6586x_power_off(void) +{ + if (tps6586x_clr_bits(tps6586x_dev, TPS6586X_SUPPLYENE, EXITSLREQ_BIT)) + return; + + tps6586x_set_bits(tps6586x_dev, TPS6586X_SUPPLYENE, SLEEP_MODE_BIT); +} + static int __devinit tps6586x_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -506,6 +520,11 @@ static int __devinit tps6586x_i2c_probe(struct i2c_client *client, goto err_add_devs; } + if (pdata->pm_off && !pm_power_off) { + tps6586x_dev = &client->dev; + pm_power_off = tps6586x_power_off; + } + return 0; err_add_devs: diff --git a/include/linux/mfd/tps6586x.h b/include/linux/mfd/tps6586x.h index f350fd0ba1df..08f109f0f81c 100644 --- a/include/linux/mfd/tps6586x.h +++ b/include/linux/mfd/tps6586x.h @@ -77,6 +77,7 @@ struct tps6586x_platform_data { int gpio_base; int irq_base; + bool pm_off; }; /* |