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| author | Jerome Neanne <jneanne@baylibre.com> | 2023-06-08 09:19:47 +0200 |
|---|---|---|
| committer | Lee Jones <lee@kernel.org> | 2023-06-15 09:19:38 +0100 |
| commit | 3df4c63675203da74385b00dd72ae90cc59dd710 (patch) | |
| tree | d3596ddbb23b7431ab10bf429cb4a4e24c1552c2 /drivers/mfd | |
| parent | 95100ed6ad4f0f74de2c4bb03618e57c896a7a89 (diff) | |
| download | linux-3df4c63675203da74385b00dd72ae90cc59dd710.tar.gz linux-3df4c63675203da74385b00dd72ae90cc59dd710.tar.bz2 linux-3df4c63675203da74385b00dd72ae90cc59dd710.zip | |
mfd: tps65219: Add support for soft shutdown via sys-off API
Use new API for power-off mode support:
Link: https://lwn.net/Articles/894511/
Link: https://lore.kernel.org/all/7hfseqa7l0.fsf@baylibre.com/
sys-off API allows support of shutdown handler and restart handler.
Shutdown was not supported before that enhancement.
This is required for platform that are not using PSCI.
Test:
- restart:
# reboot
Default is cold reset:
# cat /sys/kernel/reboot/mode
Switch boot mode to warm reset:
# echo warm > /sys/kernel/reboot/mode
- power-off:
# halt
Tested on AM62-LP-SK board.
Signed-off-by: Jerome Neanne <jneanne@baylibre.com>
Suggested-by: Andrew Davis <afd@ti.com>
Reviewed-by: Andrew Davis <afd@ti.com>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230608071947.3467751-1-jneanne@baylibre.com
Diffstat (limited to 'drivers/mfd')
| -rw-r--r-- | drivers/mfd/tps65219.c | 38 |
1 files changed, 28 insertions, 10 deletions
diff --git a/drivers/mfd/tps65219.c b/drivers/mfd/tps65219.c index 194c5a6b5220..0e0c42e4fdfc 100644 --- a/drivers/mfd/tps65219.c +++ b/drivers/mfd/tps65219.c @@ -25,13 +25,21 @@ static int tps65219_cold_reset(struct tps65219 *tps) TPS65219_MFP_COLD_RESET_I2C_CTRL_MASK); } -static int tps65219_restart(struct notifier_block *this, - unsigned long reboot_mode, void *cmd) +static int tps65219_soft_shutdown(struct tps65219 *tps) { - struct tps65219 *tps; + return regmap_update_bits(tps->regmap, TPS65219_REG_MFP_CTRL, + TPS65219_MFP_I2C_OFF_REQ_MASK, + TPS65219_MFP_I2C_OFF_REQ_MASK); +} - tps = container_of(this, struct tps65219, nb); +static int tps65219_power_off_handler(struct sys_off_data *data) +{ + tps65219_soft_shutdown(data->cb_data); + return NOTIFY_DONE; +} +static int tps65219_restart(struct tps65219 *tps, unsigned long reboot_mode) +{ if (reboot_mode == REBOOT_WARM) tps65219_warm_reset(tps); else @@ -40,10 +48,11 @@ static int tps65219_restart(struct notifier_block *this, return NOTIFY_DONE; } -static struct notifier_block pmic_rst_restart_nb = { - .notifier_call = tps65219_restart, - .priority = 200, -}; +static int tps65219_restart_handler(struct sys_off_data *data) +{ + tps65219_restart(data->cb_data, data->mode); + return NOTIFY_DONE; +} static const struct resource tps65219_pwrbutton_resources[] = { DEFINE_RES_IRQ_NAMED(TPS65219_INT_PB_FALLING_EDGE_DETECT, "falling"), @@ -269,13 +278,22 @@ static int tps65219_probe(struct i2c_client *client) } } - tps->nb = pmic_rst_restart_nb; - ret = register_restart_handler(&tps->nb); + ret = devm_register_restart_handler(tps->dev, + tps65219_restart_handler, + tps); + if (ret) { dev_err(tps->dev, "cannot register restart handler, %d\n", ret); return ret; } + ret = devm_register_power_off_handler(tps->dev, + tps65219_power_off_handler, + tps); + if (ret) { + dev_err(tps->dev, "failed to register power-off handler: %d\n", ret); + return ret; + } return 0; } |