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authorBill Huang <bilhuang@nvidia.com>2012-08-19 18:07:55 -0700
committerSamuel Ortiz <sameo@linux.intel.com>2012-09-14 09:52:14 +0200
commit004c15a68076f5bdc343bed92efed81087cecbfb (patch)
tree719632562fd71bf6ec24cd0e9a72afbeda8ff6a6 /drivers/mfd/tps6586x.c
parent80633f05b0dbf5819ef28f626f2f0b7c885d1f88 (diff)
downloadlinux-004c15a68076f5bdc343bed92efed81087cecbfb.tar.gz
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>
Diffstat (limited to 'drivers/mfd/tps6586x.c')
-rw-r--r--drivers/mfd/tps6586x.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/mfd/tps6586x.c b/drivers/mfd/tps6586x.c
index 5f58370ccf5..95ef40754dd 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: