diff options
| author | Dmitry Osipenko <digetx@gmail.com> | 2019-05-05 18:43:24 +0300 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2019-05-08 14:50:14 +0300 |
| commit | 744b13107d0d2ec36c5293d7b59129d3186c9396 (patch) | |
| tree | 6c43633a3ee6c34718acafcfea669b74a8d6bc06 /drivers/mfd | |
| parent | 4c58f7012f15a71f05cd447f7658a61376d11591 (diff) | |
| download | linux-744b13107d0d2ec36c5293d7b59129d3186c9396.tar.xz | |
mfd: max77620: Provide system power-off functionality
Provide system power-off functionality that allows to turn off machine
gracefully.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/mfd')
| -rw-r--r-- | drivers/mfd/max77620.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c index c2d88a5eca7a..436361ce3737 100644 --- a/drivers/mfd/max77620.c +++ b/drivers/mfd/max77620.c @@ -37,6 +37,8 @@ #include <linux/regmap.h> #include <linux/slab.h> +static struct max77620_chip *max77620_scratch; + static const struct resource gpio_resources[] = { DEFINE_RES_IRQ(MAX77620_IRQ_TOP_GPIO), }; @@ -481,6 +483,15 @@ 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) { @@ -488,6 +499,7 @@ static int max77620_probe(struct i2c_client *client, struct max77620_chip *chip; const struct mfd_cell *mfd_cells; int n_mfd_cells; + bool pm_off; int ret; chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); @@ -554,6 +566,12 @@ static int max77620_probe(struct i2c_client *client, return ret; } + pm_off = of_device_is_system_power_controller(client->dev.of_node); + if (pm_off && !pm_power_off) { + max77620_scratch = chip; + pm_power_off = max77620_pm_power_off; + } + return 0; } |