=?y?q?=5BPATCH=20v2=202/3=5D=20hwmon=3A=20=28pmbus/core=29=20Add=20support=20for=C2=A0NVIDIA=C2=A0nvidia195mv=20mode?=

[ASHISH YADAV]

From: Ashish Yadav <ashish.yadav@xxxxxxxxxxxx>

Extend the PMBus core vrm_version handling to support NVIDIA nvidia195mv
VID mode. This adds a new VRM/VID encoding type and the corresponding 
voltage conversion logic so devices reporting nvidia195mv can have their
VOUT/VID values interpreted correctly by the hwmon PMBus core.

Signed-off-by: Ashish Yadav <ashish.yadav@xxxxxxxxxxxx>
---
 drivers/hwmon/pmbus/pmbus.h      | 2 +-
 drivers/hwmon/pmbus/pmbus_core.c | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/hwmon/pmbus/pmbus.h b/drivers/hwmon/pmbus/pmbus.h
index d2e9bfb5320f..3ddcb742d289 100644
--- a/drivers/hwmon/pmbus/pmbus.h
+++ b/drivers/hwmon/pmbus/pmbus.h
@@ -416,7 +416,7 @@ enum pmbus_sensor_classes {
 #define PMBUS_PAGE_VIRTUAL	BIT(31)	/* Page is virtual */
 
 enum pmbus_data_format { linear = 0, ieee754, direct, vid };
-enum vrm_version { vr11 = 0, vr12, vr13, imvp9, amd625mv };
+enum vrm_version { vr11 = 0, vr12, vr13, imvp9, amd625mv, nvidia195mv };
 
 /* PMBus revision identifiers */
 #define PMBUS_REV_10 0x00	/* PMBus revision 1.0 */
diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c
index be6d05def115..4d7634ee6148 100644
--- a/drivers/hwmon/pmbus/pmbus_core.c
+++ b/drivers/hwmon/pmbus/pmbus_core.c
@@ -885,6 +885,10 @@ static s64 pmbus_reg2data_vid(struct pmbus_data *data,
 		if (val >= 0x0 && val <= 0xd8)
 			rv = DIV_ROUND_CLOSEST(155000 - val * 625, 100);
 		break;
+	case nvidia195mv:
+		if (val >= 0x01)
+			rv = 195 + (val - 1) * 5;  /* VID step is 5mv */
+		break;
 	}
 	return rv;
 }
-- 
2.39.5