From: Brandon Wyman <bjwyman@gmail.com>
To: Joel Stanley <joel@jms.id.au>,
openbmc@lists.ozlabs.org, Eddie James <eajames@linux.ibm.com>,
Guenter Roeck <linux@roeck-us.net>,
Jean Delvare <jdelvare@suse.com>,
linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Brandon Wyman <bjwyman@gmail.com>
Subject: [PATCH] hwmon: (pmbus) Add Vin unit off handling
Date: Thu, 17 Mar 2022 23:21:23 +0000 [thread overview]
Message-ID: <20220317232123.2103592-1-bjwyman@gmail.com> (raw)
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>
---
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 e0aa8aa46d8c..ef3a8ecde4df 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 ac2fbee1ba9c..a0d899dc81f0 100644
--- a/drivers/hwmon/pmbus/pmbus_core.c
+++ b/drivers/hwmon/pmbus/pmbus_core.c
@@ -1373,7 +1373,7 @@ 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",
--
2.25.1
next reply other threads:[~2022-03-17 23:21 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-17 23:21 Brandon Wyman [this message]
2022-03-18 5:31 ` [PATCH] hwmon: (pmbus) Add Vin unit off handling Guenter Roeck
2022-03-18 5:31 ` Guenter Roeck
2022-03-19 0:29 ` Brandon Wyman
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