hwmon: (pmbus) Add support for TEMP2 peak attributes

At least one PMBus chip supports peak attributes for READ_TEMPERATURE2.
Add virtual registers to be able to report it to the user.

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Reviewed-by: Robert Coulson <robert.coulson@ericsson.com>

2 files changed, 43 insertions, 5 deletions

diff --git a/drivers/hwmon/pmbus/pmbus.h b/drivers/hwmon/pmbus/pmbus.h
index cfa912d0f0b0..5d31d1c2c0f5 100644
--- a/drivers/hwmon/pmbus/pmbus.h
+++ b/drivers/hwmon/pmbus/pmbus.h
@@ -168,6 +168,9 @@
 #define PMBUS_VIRT_READ_IOUT_MIN        (PMBUS_VIRT_BASE + 19)
 #define PMBUS_VIRT_READ_IOUT_MAX        (PMBUS_VIRT_BASE + 20)
 #define PMBUS_VIRT_RESET_IOUT_HISTORY   (PMBUS_VIRT_BASE + 21)
+#define PMBUS_VIRT_READ_TEMP2_MIN       (PMBUS_VIRT_BASE + 22)
+#define PMBUS_VIRT_READ_TEMP2_MAX       (PMBUS_VIRT_BASE + 23)
+#define PMBUS_VIRT_RESET_TEMP2_HISTORY  (PMBUS_VIRT_BASE + 24)
 
 /*
  * CAPABILITY
diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c
index f241a4d2cf8f..814ebb198346 100644
--- a/drivers/hwmon/pmbus/pmbus_core.c
+++ b/drivers/hwmon/pmbus/pmbus_core.c
@@ -1401,7 +1401,42 @@ static const struct pmbus_limit_attr temp_limit_attrs[] = {
         }
 };
 
-static const struct pmbus_limit_attr temp_limit_attrs23[] = {
+static const struct pmbus_limit_attr temp_limit_attrs2[] = {
+        {
+                .reg = PMBUS_UT_WARN_LIMIT,
+                .low = true,
+                .attr = "min",
+                .alarm = "min_alarm",
+                .sbit = PB_TEMP_UT_WARNING,
+        }, {
+                .reg = PMBUS_UT_FAULT_LIMIT,
+                .low = true,
+                .attr = "lcrit",
+                .alarm = "lcrit_alarm",
+                .sbit = PB_TEMP_UT_FAULT,
+        }, {
+                .reg = PMBUS_OT_WARN_LIMIT,
+                .attr = "max",
+                .alarm = "max_alarm",
+                .sbit = PB_TEMP_OT_WARNING,
+        }, {
+                .reg = PMBUS_OT_FAULT_LIMIT,
+                .attr = "crit",
+                .alarm = "crit_alarm",
+                .sbit = PB_TEMP_OT_FAULT,
+        }, {
+                .reg = PMBUS_VIRT_READ_TEMP2_MIN,
+                .attr = "lowest",
+        }, {
+                .reg = PMBUS_VIRT_READ_TEMP2_MAX,
+                .attr = "highest",
+        }, {
+                .reg = PMBUS_VIRT_RESET_TEMP2_HISTORY,
+                .attr = "reset_history",
+        }
+};
+
+static const struct pmbus_limit_attr temp_limit_attrs3[] = {
         {
                 .reg = PMBUS_UT_WARN_LIMIT,
                 .low = true,
@@ -1450,8 +1485,8 @@ static const struct pmbus_sensor_attr temp_attributes[] = {
                 .sfunc = PMBUS_HAVE_STATUS_TEMP,
                 .sbase = PB_STATUS_TEMP_BASE,
                 .gbit = PB_STATUS_TEMPERATURE,
-                .limit = temp_limit_attrs23,
-                .nlimit = ARRAY_SIZE(temp_limit_attrs23),
+                .limit = temp_limit_attrs2,
+                .nlimit = ARRAY_SIZE(temp_limit_attrs2),
         }, {
                 .reg = PMBUS_READ_TEMPERATURE_3,
                 .class = PSC_TEMPERATURE,
@@ -1462,8 +1497,8 @@ static const struct pmbus_sensor_attr temp_attributes[] = {
                 .sfunc = PMBUS_HAVE_STATUS_TEMP,
                 .sbase = PB_STATUS_TEMP_BASE,
                 .gbit = PB_STATUS_TEMPERATURE,
-                .limit = temp_limit_attrs23,
-                .nlimit = ARRAY_SIZE(temp_limit_attrs23),
+                .limit = temp_limit_attrs3,
+                .nlimit = ARRAY_SIZE(temp_limit_attrs3),
         }
 };