From: Brandon Wyman bjwyman@gmail.com
stable inclusion from stable-v5.10.110 commit d678f002f0bc38f938b0b9574e5bfc717fc95902 bugzilla: https://gitee.com/openeuler/kernel/issues/I574AL
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit a5436af598779219b375c1977555c82def1c35d0 ]
If there is an input undervoltage fault, reported in STATUS_INPUT command response, there is quite likely a "Unit Off For Insufficient Input Voltage" condition as well.
Add a constant for bit 3 of STATUS_INPUT. Update the Vin limit attributes to include both bits in the mask for clearing faults.
If an input undervoltage fault occurs, causing a unit off for insufficient input voltage, but the unit is off bit is not cleared, the STATUS_WORD will not be updated to clear the input fault condition. Including the unit is off bit (bit 3) allows for the input fault condition to completely clear.
Signed-off-by: Brandon Wyman bjwyman@gmail.com Link: https://lore.kernel.org/r/20220317232123.2103592-1-bjwyman@gmail.com Fixes: b4ce237b7f7d3 ("hwmon: (pmbus) Introduce infrastructure to detect sensors and limit registers") [groeck: Dropped unnecessary ()] Signed-off-by: Guenter Roeck linux@roeck-us.net Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yu Liao liaoyu15@huawei.com Reviewed-by: Wei Li liwei391@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/hwmon/pmbus/pmbus.h | 1 + drivers/hwmon/pmbus/pmbus_core.c | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/hwmon/pmbus/pmbus.h b/drivers/hwmon/pmbus/pmbus.h index 88a5df2633fb..de27837e8527 100644 --- a/drivers/hwmon/pmbus/pmbus.h +++ b/drivers/hwmon/pmbus/pmbus.h @@ -319,6 +319,7 @@ enum pmbus_fan_mode { percent = 0, rpm }; /* * STATUS_VOUT, STATUS_INPUT */ +#define PB_VOLTAGE_VIN_OFF BIT(3) #define PB_VOLTAGE_UV_FAULT BIT(4) #define PB_VOLTAGE_UV_WARNING BIT(5) #define PB_VOLTAGE_OV_WARNING BIT(6) diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c index 7a13057007d9..117e3ce9c76a 100644 --- a/drivers/hwmon/pmbus/pmbus_core.c +++ b/drivers/hwmon/pmbus/pmbus_core.c @@ -1360,7 +1360,7 @@ static const struct pmbus_limit_attr vin_limit_attrs[] = { .reg = PMBUS_VIN_UV_FAULT_LIMIT, .attr = "lcrit", .alarm = "lcrit_alarm", - .sbit = PB_VOLTAGE_UV_FAULT, + .sbit = PB_VOLTAGE_UV_FAULT | PB_VOLTAGE_VIN_OFF, }, { .reg = PMBUS_VIN_OV_WARN_LIMIT, .attr = "max",