hwmon: (pmbus) Add support for VR12

Newer chips such as MAX20751 support VR12. Add support for it.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/drivers/hwmon/pmbus/pmbus.c b/drivers/hwmon/pmbus/pmbus.c
index 554d024..bbfa35d 100644 (file)
--- a/drivers/hwmon/pmbus/pmbus.c
+++ b/drivers/hwmon/pmbus/pmbus.c
@@ -129,6 +129,7 @@ static int pmbus_identify(struct i2c_client *client,
                                break;
                        case 1:
                                info->format[PSC_VOLTAGE_OUT] = vid;
+                               info->vrm_version = vr11;
                                break;
                        case 2:
                                info->format[PSC_VOLTAGE_OUT] = direct;

diff --git a/drivers/hwmon/pmbus/pmbus.h b/drivers/hwmon/pmbus/pmbus.h
index 2427f6e..eece5f5 100644 (file)
--- a/drivers/hwmon/pmbus/pmbus.h
+++ b/drivers/hwmon/pmbus/pmbus.h
@@ -338,10 +338,12 @@ enum pmbus_sensor_classes {
 #define PMBUS_HAVE_STATUS_VMON (1 << 19)
 
 enum pmbus_data_format { linear = 0, direct, vid };
+enum vrm_version { vr11 = 0, vr12 };
 
 struct pmbus_driver_info {
        int pages;              /* Total number of pages */
        enum pmbus_data_format format[PSC_NUM_CLASSES];
+       enum vrm_version vrm_version;
        /*
         * Support one set of coefficients for each sensor type
         * Used for chips providing data in direct mode.

diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c
index 306a1b1..3981981 100644 (file)
--- a/drivers/hwmon/pmbus/pmbus_core.c
+++ b/drivers/hwmon/pmbus/pmbus_core.c
@@ -515,16 +515,24 @@ static long pmbus_reg2data_direct(struct pmbus_data *data,
 /*
  * Convert VID sensor values to milli- or micro-units
  * depending on sensor type.
- * We currently only support VR11.
  */
 static long pmbus_reg2data_vid(struct pmbus_data *data,
                               struct pmbus_sensor *sensor)
 {
        long val = sensor->data;
+       long rv = 0;
 
-       if (val < 0x02 || val > 0xb2)
-               return 0;
-       return DIV_ROUND_CLOSEST(160000 - (val - 2) * 625, 100);
+       switch (data->info->vrm_version) {
+       case vr11:
+               if (val >= 0x02 && val <= 0xb2)
+                       rv = DIV_ROUND_CLOSEST(160000 - (val - 2) * 625, 100);
+               break;
+       case vr12:
+               if (val >= 0x01)
+                       rv = 250 + (val - 1) * 5;
+               break;
+       }
+       return rv;
 }
 
 static long pmbus_reg2data(struct pmbus_data *data, struct pmbus_sensor *sensor)