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mfd: palmas: Add power off control

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Hook up "pm_power_off" to palmas power off routine if there is DT
property "ti,system-power-controller" defined, so platform which is
powered by this regulator can be powered off properly.

Acked-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Mallikarjun Kasoju <mkasoju@nvidia.com>
Signed-off-by: Bill Huang <bilhuang@nvidia.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Bill Huang 2013-08-08 04:45:05 -07:00 committed by Lee Jones
parent 3134bcae4f
commit b81eec09a4
3 changed files with 37 additions and 2 deletions
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5
Documentation/devicetree/bindings/regulator/palmas-pmic.txt
View File

@ -37,6 +37,9 @@ Optional nodes:
ti,smps-range - OTP has the wrong range set for the hardware so override
0 - low range, 1 - high range.
- ti,system-power-controller: Telling whether or not this pmic is controlling
the system power.
Example:
#include <dt-bindings/interrupt-controller/irq.h>
@ -49,6 +52,8 @@ pmic {
ti,ldo6-vibrator;
ti,system-power-controller;
regulators {
smps12_reg : smps12 {
regulator-name = "smps12";

33
drivers/mfd/palmas.c
View File

@ -229,6 +229,32 @@ static void palmas_dt_to_pdata(struct i2c_client *i2c,
PALMAS_POWER_CTRL_ENABLE2_MASK;
if (i2c->irq)
palmas_set_pdata_irq_flag(i2c, pdata);
pdata->pm_off = of_property_read_bool(node,
"ti,system-power-controller");
}
static struct palmas *palmas_dev;
static void palmas_power_off(void)
{
unsigned int addr;
int ret, slave;
if (!palmas_dev)
return;
slave = PALMAS_BASE_TO_SLAVE(PALMAS_PMU_CONTROL_BASE);
addr = PALMAS_BASE_TO_REG(PALMAS_PMU_CONTROL_BASE, PALMAS_DEV_CTRL);
ret = regmap_update_bits(
palmas_dev->regmap[slave],
addr,
PALMAS_DEV_CTRL_DEV_ON,
0);
if (ret)
pr_err("%s: Unable to write to DEV_CTRL_DEV_ON: %d\n",
__func__, ret);
}
static unsigned int palmas_features = PALMAS_PMIC_FEATURE_SMPS10_BOOST;
@ -423,10 +449,13 @@ no_irq:
*/
if (node) {
ret = of_platform_populate(node, NULL, NULL, &i2c->dev);
if (ret < 0)
if (ret < 0) {
goto err_irq;
else
} else if (pdata->pm_off && !pm_power_off) {
palmas_dev = palmas;
pm_power_off = palmas_power_off;
return ret;
}
}
return ret;

1
include/linux/mfd/palmas.h
View File

@ -258,6 +258,7 @@ struct palmas_platform_data {
*/
int mux_from_pdata;
u8 pad1, pad2;
bool pm_off;
struct palmas_pmic_platform_data *pmic_pdata;
struct palmas_gpadc_platform_data *gpadc_pdata;