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mfd: dt: tps65910: 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>
This commit is contained in:
Bill Huang 2012-08-19 18:07:56 -07:00 committed by Samuel Ortiz
parent 004c15a680
commit b079fa7206
3 changed files with 29 additions and 0 deletions
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4
Documentation/devicetree/bindings/mfd/tps65910.txt
View File

@ -59,6 +59,8 @@ Optional properties:
in TPS6591X datasheet)
- ti,en-gpio-sleep: enable sleep control for gpios
There should be 9 entries here, one for each gpio.
- ti,system-power-controller: Telling whether or not this pmic is controlling
the system power.
Regulator Optional properties:
- ti,regulator-ext-sleep-control: enable external sleep
@ -79,6 +81,8 @@ Example:
#interrupt-cells = <2>;
interrupt-controller;
ti,system-power-controller;
ti,vmbch-threshold = 0;
ti,vmbch2-threshold = 0;
ti,en-ck32k-xtal;

22
drivers/mfd/tps65910.c
View File

@ -198,6 +198,8 @@ static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
board_info->irq = client->irq;
board_info->irq_base = -1;
board_info->pm_off = of_property_read_bool(np,
"ti,system-power-controller");
return board_info;
}
@ -210,6 +212,21 @@ struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
}
#endif
static struct i2c_client *tps65910_i2c_client;
static void tps65910_power_off(void)
{
struct tps65910 *tps65910;
tps65910 = dev_get_drvdata(&tps65910_i2c_client->dev);
if (tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
DEVCTRL_PWR_OFF_MASK) < 0)
return;
tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
DEVCTRL_DEV_ON_MASK);
}
static __devinit int tps65910_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
@ -267,6 +284,11 @@ static __devinit int tps65910_i2c_probe(struct i2c_client *i2c,
tps65910_ck32k_init(tps65910, pmic_plat_data);
tps65910_sleepinit(tps65910, pmic_plat_data);
if (pmic_plat_data->pm_off && !pm_power_off) {
tps65910_i2c_client = i2c;
pm_power_off = tps65910_power_off;
}
return ret;
}

3
include/linux/mfd/tps65910.h
View File

@ -366,6 +366,8 @@
/*Register DEVCTRL (0x80) register.RegisterDescription */
#define DEVCTRL_PWR_OFF_MASK 0x80
#define DEVCTRL_PWR_OFF_SHIFT 7
#define DEVCTRL_RTC_PWDN_MASK 0x40
#define DEVCTRL_RTC_PWDN_SHIFT 6
#define DEVCTRL_CK32K_CTRL_MASK 0x20
@ -809,6 +811,7 @@ struct tps65910_board {
int vmbch2_threshold;
bool en_ck32k_xtal;
bool en_dev_slp;
bool pm_off;
struct tps65910_sleep_keepon_data *slp_keepon;
bool en_gpio_sleep[TPS6591X_MAX_NUM_GPIO];
unsigned long regulator_ext_sleep_control[TPS65910_NUM_REGS];