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Commit 068c2270 authored by Guenter Roeck's avatar Guenter Roeck
Browse files

hwmon: (pmbus) Add support for VR12 



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

Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent ead80803

drivers/hwmon/pmbus/pmbus.c

+1 −0
Original line number Diff line number Diff line
@@ -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;

drivers/hwmon/pmbus/pmbus.h

+2 −0
Original line number Diff line number Diff line
@@ -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.

drivers/hwmon/pmbus/pmbus_core.c

+12 −4
Original line number Diff line number Diff line
@@ -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)