diff options
| author | Dmitry Osipenko <digetx@gmail.com> | 2020-11-15 21:45:05 +0100 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2020-11-27 08:42:59 +0100 |
| commit | 129989d5ca63884572d22a5a271d93d0eddf8a52 (patch) | |
| tree | 2df65a38d24f2b7c92e671778fdf069308d6d0cb /drivers/mfd | |
| parent | mfd: altera-sysmgr: Use resource_size function on resource object (diff) | |
| download | linux-129989d5ca63884572d22a5a271d93d0eddf8a52.tar.xz linux-129989d5ca63884572d22a5a271d93d0eddf8a52.zip | |
mfd: tps65910: Correct power-off programming sequence
Correct power-off programming sequence in order to fix shutting down
devices which are using TPS65910 PMIC.
In accordance to the TPS65910 datasheet, the PMIC's state-machine
transitions into the OFF state only when DEV_OFF bit of DEVCTRL_REG is
set. The ON / SLEEP states also should be cleared, otherwise PMIC won't
get into a proper state on shutdown. Devices like Nexus 7 tablet and Ouya
game console are shutting down properly now.
Tested-by: Peter Geis <pgwipeout@gmail.com>
Tested-by: Zack Pearsall <zpearsall@yahoo.com>
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/tps65910.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/mfd/tps65910.c b/drivers/mfd/tps65910.c index ca0b61011def..6e105cca27d4 100644 --- a/drivers/mfd/tps65910.c +++ b/drivers/mfd/tps65910.c @@ -436,12 +436,18 @@ 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_clear_bits(tps65910->regmap, TPS65910_DEVCTRL, - DEVCTRL_DEV_ON_MASK); + regmap_update_bits(tps65910->regmap, TPS65910_DEVCTRL, + DEVCTRL_DEV_OFF_MASK | DEVCTRL_DEV_ON_MASK, + DEVCTRL_DEV_OFF_MASK); } static int tps65910_i2c_probe(struct i2c_client *i2c, |