| Message ID | 20210731173842.19643-9-digetx@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | Add OTG mode support to Tegra USB PHY, SMB347 and Nexus 7 | expand |
Hi, On Sat, Jul 31, 2021 at 08:38:38PM +0300, Dmitry Osipenko wrote: > Pin control needs to be activated by setting the enable bit, otherwise > hardware rejects all pin changes. Previously this stayed unnoticed on > Nexus 7 because pin control was enabled by default after rebooting from > downstream kernel, which uses driver that enables the bit and charger > registers are non-volatile until power supply (battery) is disconnected. > Configure the pin control enable bit. This fixes the potentially > never-enabled charging on devices that use pin control. > > Signed-off-by: Dmitry Osipenko <digetx@gmail.com> > --- Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com> -- Sebastian > drivers/power/supply/smb347-charger.c | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/drivers/power/supply/smb347-charger.c b/drivers/power/supply/smb347-charger.c > index 27254e6efdde..1c9205ca0993 100644 > --- a/drivers/power/supply/smb347-charger.c > +++ b/drivers/power/supply/smb347-charger.c > @@ -55,6 +55,7 @@ > #define CFG_PIN_EN_CTRL_ACTIVE_LOW 0x60 > #define CFG_PIN_EN_APSD_IRQ BIT(1) > #define CFG_PIN_EN_CHARGER_ERROR BIT(2) > +#define CFG_PIN_EN_CTRL BIT(4) > #define CFG_THERM 0x07 > #define CFG_THERM_SOFT_HOT_COMPENSATION_MASK 0x03 > #define CFG_THERM_SOFT_HOT_COMPENSATION_SHIFT 0 > @@ -726,6 +727,15 @@ static int smb347_hw_init(struct smb347_charger *smb) > if (ret < 0) > goto fail; > > + /* Activate pin control, making it writable. */ > + switch (smb->enable_control) { > + case SMB3XX_CHG_ENABLE_PIN_ACTIVE_LOW: > + case SMB3XX_CHG_ENABLE_PIN_ACTIVE_HIGH: > + ret = regmap_set_bits(smb->regmap, CFG_PIN, CFG_PIN_EN_CTRL); > + if (ret < 0) > + goto fail; > + } > + > /* > * Make the charging functionality controllable by a write to the > * command register unless pin control is specified in the platform > -- > 2.32.0 >
diff --git a/drivers/power/supply/smb347-charger.c b/drivers/power/supply/smb347-charger.c index 27254e6efdde..1c9205ca0993 100644 --- a/drivers/power/supply/smb347-charger.c +++ b/drivers/power/supply/smb347-charger.c @@ -55,6 +55,7 @@ #define CFG_PIN_EN_CTRL_ACTIVE_LOW 0x60 #define CFG_PIN_EN_APSD_IRQ BIT(1) #define CFG_PIN_EN_CHARGER_ERROR BIT(2) +#define CFG_PIN_EN_CTRL BIT(4) #define CFG_THERM 0x07 #define CFG_THERM_SOFT_HOT_COMPENSATION_MASK 0x03 #define CFG_THERM_SOFT_HOT_COMPENSATION_SHIFT 0 @@ -726,6 +727,15 @@ static int smb347_hw_init(struct smb347_charger *smb) if (ret < 0) goto fail; + /* Activate pin control, making it writable. */ + switch (smb->enable_control) { + case SMB3XX_CHG_ENABLE_PIN_ACTIVE_LOW: + case SMB3XX_CHG_ENABLE_PIN_ACTIVE_HIGH: + ret = regmap_set_bits(smb->regmap, CFG_PIN, CFG_PIN_EN_CTRL); + if (ret < 0) + goto fail; + } + /* * Make the charging functionality controllable by a write to the * command register unless pin control is specified in the platform
Pin control needs to be activated by setting the enable bit, otherwise hardware rejects all pin changes. Previously this stayed unnoticed on Nexus 7 because pin control was enabled by default after rebooting from downstream kernel, which uses driver that enables the bit and charger registers are non-volatile until power supply (battery) is disconnected. Configure the pin control enable bit. This fixes the potentially never-enabled charging on devices that use pin control. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> --- drivers/power/supply/smb347-charger.c | 10 ++++++++++ 1 file changed, 10 insertions(+)