bilhuang at nvidia
Aug 19, 2012, 6:07 PM
Post #1 of 7
(93 views)
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[PATCH v2 1/2] mfd: dt: tps6586x: Add power off control
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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 [at] nvidia>
Signed-off-by: Bill Huang <bilhuang [at] nvidia>
Tested-by: Stephen Warren <swarren [at] wwwdotorg>
---
.../devicetree/bindings/regulator/tps6586x.txt | 6 ++++++
drivers/mfd/tps6586x.c | 19 +++++++++++++++++++
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 d156e1b..03dfa4e 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 353c348..d08f59c 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)
{
@@ -505,6 +519,11 @@ 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 f350fd0..08f109f 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;
};
/*
--
1.7.4.1
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