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-rw-r--r--Documentation/hwmon/max344401
-rw-r--r--drivers/hwmon/pmbus/max34440.c9
2 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/hwmon/max34440 b/Documentation/hwmon/max34440
index 8ab51536a1e..36b335c461d 100644
--- a/Documentation/hwmon/max34440
+++ b/Documentation/hwmon/max34440
@@ -56,6 +56,7 @@ in[1-6]_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status.
in[1-6]_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status.
in[1-6]_lcrit_alarm Voltage critical low alarm. From VOLTAGE_UV_FAULT status.
in[1-6]_crit_alarm Voltage critical high alarm. From VOLTAGE_OV_FAULT status.
+in[1-6]_lowest Historical minimum voltage.
in[1-6]_highest Historical maximum voltage.
in[1-6]_reset_history Write any value to reset history.
diff --git a/drivers/hwmon/pmbus/max34440.c b/drivers/hwmon/pmbus/max34440.c
index 7d830c1e703..95ee9e195cb 100644
--- a/drivers/hwmon/pmbus/max34440.c
+++ b/drivers/hwmon/pmbus/max34440.c
@@ -30,6 +30,7 @@ enum chips { max34440, max34441 };
#define MAX34440_MFR_VOUT_PEAK 0xd4
#define MAX34440_MFR_IOUT_PEAK 0xd5
#define MAX34440_MFR_TEMPERATURE_PEAK 0xd6
+#define MAX34440_MFR_VOUT_MIN 0xd7
#define MAX34440_STATUS_OC_WARN (1 << 0)
#define MAX34440_STATUS_OC_FAULT (1 << 1)
@@ -41,6 +42,10 @@ static int max34440_read_word_data(struct i2c_client *client, int page, int reg)
int ret;
switch (reg) {
+ case PMBUS_VIRT_READ_VOUT_MIN:
+ ret = pmbus_read_word_data(client, page,
+ MAX34440_MFR_VOUT_MIN);
+ break;
case PMBUS_VIRT_READ_VOUT_MAX:
ret = pmbus_read_word_data(client, page,
MAX34440_MFR_VOUT_PEAK);
@@ -73,6 +78,10 @@ static int max34440_write_word_data(struct i2c_client *client, int page,
switch (reg) {
case PMBUS_VIRT_RESET_VOUT_HISTORY:
ret = pmbus_write_word_data(client, page,
+ MAX34440_MFR_VOUT_MIN, 0x7fff);
+ if (ret)
+ break;
+ ret = pmbus_write_word_data(client, page,
MAX34440_MFR_VOUT_PEAK, 0);
break;
case PMBUS_VIRT_RESET_IOUT_HISTORY: