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mfd: tps65910: Set PWR_OFF bit during driver probe 

The PWR_OFF bit needs to be set in order to power off properly, without
hanging PMIC. This bit needs to be set early in order to allow thermal
protection of NVIDIA Terga SoCs to power off hardware properly, otherwise
a battery re-plug may be needed on some devices to recover after the hang.

Cc: <stable@vger.kernel.org>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Tested-by: Svyatoslav Ryhel <clamor95@gmail.com> # ASUS TF201
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20211124190104.23554-1-digetx@gmail.com
This commit is contained in:
Dmitry Osipenko 2021-11-24 22:01:04 +03:00 committed by Lee Jones
parent 5b78223f55
commit 7620ad0bdf
1 changed files with 13 additions and 9 deletions
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22
drivers/mfd/tps65910.c
View File

@ -436,15 +436,6 @@ static void tps65910_power_off(void)
tps65910 = dev_get_drvdata(&tps65910_i2c_client->dev);
/*
* The PWR_OFF bit needs to be set separately, before transitioning
* to the OFF state. It enables the "sequential" power-off mode on
* TPS65911, it's a NO-OP on TPS65910.
*/
if (regmap_set_bits(tps65910->regmap, TPS65910_DEVCTRL,
DEVCTRL_PWR_OFF_MASK) < 0)
return;
regmap_update_bits(tps65910->regmap, TPS65910_DEVCTRL,
DEVCTRL_DEV_OFF_MASK | DEVCTRL_DEV_ON_MASK,
DEVCTRL_DEV_OFF_MASK);
@ -504,6 +495,19 @@ static int tps65910_i2c_probe(struct i2c_client *i2c,
tps65910_sleepinit(tps65910, pmic_plat_data);
if (pmic_plat_data->pm_off && !pm_power_off) {
/*
* The PWR_OFF bit needs to be set separately, before
* transitioning to the OFF state. It enables the "sequential"
* power-off mode on TPS65911, it's a NO-OP on TPS65910.
*/
ret = regmap_set_bits(tps65910->regmap, TPS65910_DEVCTRL,
DEVCTRL_PWR_OFF_MASK);
if (ret) {
dev_err(&i2c->dev, "failed to set power-off mode: %d\n",
ret);
return ret;
}
tps65910_i2c_client = i2c;
pm_power_off = tps65910_power_off;
}