Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 56aad5d1 authored by Guenter Roeck's avatar Guenter Roeck Committed by Guenter Roeck
Browse files

hwmon: (max34440) Add support for 'lowest' output voltage attribute 



MAX34440 and compatibles support reporting the lowest measured output voltage.
Add support for it.

Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
Acked-by: default avatarJean Delvare <khali@linux-fr.org>
parent f15df57d

Documentation/hwmon/max34440

+1 −0
Original line number Diff line number Diff line
@@ -56,6 +56,7 @@ in[1-6]_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status. 
in[1-6]_max_alarm	Voltage high alarm. From VOLTAGE_OV_WARNING status.

in[1-6]_lcrit_alarm	Voltage critical low alarm. From VOLTAGE_UV_FAULT status.

in[1-6]_crit_alarm	Voltage critical high alarm. From VOLTAGE_OV_FAULT status.

in[1-6]_lowest		Historical minimum voltage.

in[1-6]_highest		Historical maximum voltage.

in[1-6]_reset_history	Write any value to reset history.

drivers/hwmon/pmbus/max34440.c

+9 −0
Original line number Diff line number Diff line
@@ -30,6 +30,7 @@ enum chips { max34440, max34441 }; 
#define MAX34440_MFR_VOUT_PEAK		0xd4

#define MAX34440_MFR_IOUT_PEAK		0xd5

#define MAX34440_MFR_TEMPERATURE_PEAK	0xd6

#define MAX34440_MFR_VOUT_MIN		0xd7



#define MAX34440_STATUS_OC_WARN		(1 << 0)

#define MAX34440_STATUS_OC_FAULT	(1 << 1)
@@ -41,6 +42,10 @@ static int max34440_read_word_data(struct i2c_client *client, int page, int reg) 
	int ret;



	switch (reg) {

	case PMBUS_VIRT_READ_VOUT_MIN:

		ret = pmbus_read_word_data(client, page,

					   MAX34440_MFR_VOUT_MIN);

		break;

	case PMBUS_VIRT_READ_VOUT_MAX:

		ret = pmbus_read_word_data(client, page,

					   MAX34440_MFR_VOUT_PEAK);
@@ -72,6 +77,10 @@ static int max34440_write_word_data(struct i2c_client *client, int page, 


	switch (reg) {

	case PMBUS_VIRT_RESET_VOUT_HISTORY:

		ret = pmbus_write_word_data(client, page,

					    MAX34440_MFR_VOUT_MIN, 0x7fff);

		if (ret)

			break;

		ret = pmbus_write_word_data(client, page,

					    MAX34440_MFR_VOUT_PEAK, 0);

		break;