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alistair23-linux
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regulator: act8865: Add support to turn off all outputs 

When the property "poweroff-source" is found in the
devicetree, the function pm_power_off is defined. This function sends the
rights bit fields to the global off control register. shutdown/poweroff
commands are now supported for hardware components which use these PMU.

Signed-off-by: Romain Perier <romain.perier@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
hifive-unleashed-5.1
Romain Perier 2014-10-14 06:31:10 +00:00 committed by Mark Brown
parent a4b4e0461e
commit 2b17fa2825
1 changed files with 31 additions and 0 deletions
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31
drivers/regulator/act8865-regulator.c
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@ -61,6 +61,8 @@
#define ACT8846_REG12_VSET 0xa0
#define ACT8846_REG12_CTRL 0xa1
#define ACT8846_REG13_CTRL 0xb1
#define ACT8846_GLB_OFF_CTRL 0xc3
#define ACT8846_OFF_SYSMASK 0x18
/*
* ACT8865 Global Register Map.
@ -84,6 +86,7 @@
#define ACT8865_LDO3_CTRL 0x61
#define ACT8865_LDO4_VSET 0x64
#define ACT8865_LDO4_CTRL 0x65
#define ACT8865_MSTROFF 0x20
/*
* Field Definitions.
@ -98,6 +101,8 @@
struct act8865 {
struct regmap *regmap;
int off_reg;
int off_mask;
};
static const struct regmap_config act8865_regmap_config = {
@ -275,6 +280,16 @@ static struct regulator_init_data
return NULL;
}
static struct i2c_client *act8865_i2c_client;
static void act8865_power_off(void)
{
struct act8865 *act8865;
act8865 = i2c_get_clientdata(act8865_i2c_client);
regmap_write(act8865->regmap, act8865->off_reg, act8865->off_mask);
while (1);
}
static int act8865_pmic_probe(struct i2c_client *client,
const struct i2c_device_id *i2c_id)
{
@ -285,6 +300,7 @@ static int act8865_pmic_probe(struct i2c_client *client,
int i, ret, num_regulators;
struct act8865 *act8865;
unsigned long type;
int off_reg, off_mask;
pdata = dev_get_platdata(dev);
@ -304,10 +320,14 @@ static int act8865_pmic_probe(struct i2c_client *client,
case ACT8846:
regulators = act8846_regulators;
num_regulators = ARRAY_SIZE(act8846_regulators);
off_reg = ACT8846_GLB_OFF_CTRL;
off_mask = ACT8846_OFF_SYSMASK;
break;
case ACT8865:
regulators = act8865_regulators;
num_regulators = ARRAY_SIZE(act8865_regulators);
off_reg = ACT8865_SYS_CTRL;
off_mask = ACT8865_MSTROFF;
break;
default:
dev_err(dev, "invalid device id %lu\n", type);
@ -345,6 +365,17 @@ static int act8865_pmic_probe(struct i2c_client *client,
return ret;
}
if (of_system_has_poweroff_source(dev->of_node)) {
if (!pm_power_off) {
act8865_i2c_client = client;
act8865->off_reg = off_reg;
act8865->off_mask = off_mask;
pm_power_off = act8865_power_off;
} else {
dev_err(dev, "Failed to set poweroff capability, already defined\n");
}
}
/* Finally register devices */
for (i = 0; i < num_regulators; i++) {
const struct regulator_desc *desc = &regulators[i];