Commit 969a4ec8 authored by Ashish Yadav's avatar Ashish Yadav Committed by Guenter Roeck
Browse files

hwmon: (pmbus/core) Add support for NVIDIA nvidia195mv mode 



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: default avatarAshish Yadav <ashish.yadav@infineon.com>
Link: https://lore.kernel.org/r/20260223050804.4287-3-Ashish.Yadav@infineon.com


Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent 4c9d861b

drivers/hwmon/pmbus/pmbus.h

+1 −1
Original line number Diff line number Diff line
@@ -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 */

drivers/hwmon/pmbus/pmbus_core.c

+4 −0
Original line number Diff line number Diff line
@@ -891,6 +891,10 @@ 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;

}