On Sun, 24 May 2020, Dmitry Osipenko wrote: > This patch fixes system shutdown on a devices that use TPS65910 as a > system's power controller. 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 now shutting down properly. > > Tested-by: Zack Pearsall <zpearsall@xxxxxxxxx> > Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx> > --- > > Changelog: > > v2: - Now using a single tps65910_reg_update_bits() instead of set+clear. > Thanks to Michał Mirosław for the suggestion. Michał should review. > drivers/mfd/tps65910.c | 9 +++++++-- > 1 file changed, 7 insertions(+), 2 deletions(-) > > diff --git a/drivers/mfd/tps65910.c b/drivers/mfd/tps65910.c > index 11959021b50a..3f4483dec871 100644 > --- a/drivers/mfd/tps65910.c > +++ b/drivers/mfd/tps65910.c > @@ -440,8 +440,13 @@ static void tps65910_power_off(void) > DEVCTRL_PWR_OFF_MASK) < 0) > return; > > - tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL, > - DEVCTRL_DEV_ON_MASK); > + if (tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL, > + DEVCTRL_DEV_SLP_MASK) < 0) > + return; > + > + tps65910_reg_update_bits(tps65910, TPS65910_DEVCTRL, > + DEVCTRL_DEV_OFF_MASK | DEVCTRL_DEV_ON_MASK, > + DEVCTRL_DEV_OFF_MASK); > } > > static int tps65910_i2c_probe(struct i2c_client *i2c, -- Lee Jones [李琼斯] Linaro Services Technical Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog
