Provide system power-off functionality that allows to turn off machine gracefully.
Signed-off-by: Dmitry Osipenko <[email protected]> --- drivers/mfd/max77620.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c index b7a058069808..3b8fd0b45425 100644 --- a/drivers/mfd/max77620.c +++ b/drivers/mfd/max77620.c @@ -41,6 +41,8 @@ struct max77620_desc { enum max77620_chip_id chip_id; }; +static struct max77620_chip *max77620_scratch; + static const struct resource gpio_resources[] = { DEFINE_RES_IRQ(MAX77620_IRQ_TOP_GPIO), }; @@ -485,6 +487,15 @@ static int max77620_read_es_version(struct max77620_chip *chip) return ret; } +static void max77620_pm_power_off(void) +{ + struct max77620_chip *chip = max77620_scratch; + + regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG1, + MAX77620_ONOFFCNFG1_SFT_RST, + MAX77620_ONOFFCNFG1_SFT_RST); +} + static int max77620_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -493,6 +504,7 @@ static int max77620_probe(struct i2c_client *client, const struct mfd_cell *mfd_cells; const struct max77620_desc *desc; int n_mfd_cells; + bool pm_off; int ret; chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); @@ -563,6 +575,13 @@ static int max77620_probe(struct i2c_client *client, return ret; } + pm_off = of_property_read_bool(client->dev.of_node, + "maxim,system-power-controller"); + if (pm_off && !pm_power_off) { + max77620_scratch = chip; + pm_power_off = max77620_pm_power_off; + } + return 0; } -- 2.21.0
