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Commit 98591dbe authored by Guenter Roeck's avatar Guenter Roeck
Browse files

hwmon: (max34440) Add support for peak attributes 



Add support for voltage, current, and temperature peak (historic maximum)
attributes.

Signed-off-by: default avatarGuenter Roeck <guenter.roeck@ericsson.com>
Reviewed-by: default avatarRobert Coulson <robert.coulson@ericsson.com>
parent 70e94b27

Documentation/hwmon/max34440

+6 −0
Original line number Diff line number Diff line
@@ -56,6 +56,8 @@ 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]_highest		Historical maximum voltage.

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



curr[1-6]_label		"iout[1-6]".

curr[1-6]_input		Measured current. From READ_IOUT register.
@@ -63,6 +65,8 @@ curr[1-6]_max Maximum current. From IOUT_OC_WARN_LIMIT register. 
curr[1-6]_crit		Critical maximum current. From IOUT_OC_FAULT_LIMIT register.

curr[1-6]_max_alarm	Current high alarm. From IOUT_OC_WARNING status.

curr[1-6]_crit_alarm	Current critical high alarm. From IOUT_OC_FAULT status.

curr[1-6]_highest	Historical maximum current.

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



			in6 and curr6 attributes only exist for MAX34440.
@@ -75,5 +79,7 @@ temp[1-8]_max Maximum temperature. From OT_WARN_LIMIT register. 
temp[1-8]_crit		Critical high temperature. From OT_FAULT_LIMIT register.

temp[1-8]_max_alarm	Temperature high alarm.

temp[1-8]_crit_alarm	Temperature critical high alarm.

temp[1-8]_highest	Historical maximum temperature.

temp[1-8]_reset_history	Write any value to reset history.



			temp7 and temp8 attributes only exist for MAX34440.

drivers/hwmon/pmbus/max34440.c

+63 −0
Original line number Diff line number Diff line
@@ -27,11 +27,70 @@ 


enum chips { max34440, max34441 };



#define MAX34440_MFR_VOUT_PEAK		0xd4

#define MAX34440_MFR_IOUT_PEAK		0xd5

#define MAX34440_MFR_TEMPERATURE_PEAK	0xd6



#define MAX34440_STATUS_OC_WARN		(1 << 0)

#define MAX34440_STATUS_OC_FAULT	(1 << 1)

#define MAX34440_STATUS_OT_FAULT	(1 << 5)

#define MAX34440_STATUS_OT_WARN		(1 << 6)



static int max34440_read_word_data(struct i2c_client *client, int page, int reg)

{

	int ret;



	switch (reg) {

	case PMBUS_VIRT_READ_VOUT_MAX:

		ret = pmbus_read_word_data(client, page,

					   MAX34440_MFR_VOUT_PEAK);

		break;

	case PMBUS_VIRT_READ_IOUT_MAX:

		ret = pmbus_read_word_data(client, page,

					   MAX34440_MFR_IOUT_PEAK);

		break;

	case PMBUS_VIRT_READ_TEMP_MAX:

		ret = pmbus_read_word_data(client, page,

					   MAX34440_MFR_TEMPERATURE_PEAK);

		break;

	case PMBUS_VIRT_RESET_VOUT_HISTORY:

	case PMBUS_VIRT_RESET_IOUT_HISTORY:

	case PMBUS_VIRT_RESET_TEMP_HISTORY:

		ret = 0;

		break;

	default:

		ret = -ENODATA;

		break;

	}

	return ret;

}



static int max34440_write_word_data(struct i2c_client *client, int page,

				    int reg, u16 word)

{

	int ret;



	switch (reg) {

	case PMBUS_VIRT_RESET_VOUT_HISTORY:

		ret = pmbus_write_word_data(client, page,

					    MAX34440_MFR_VOUT_PEAK, 0);

		break;

	case PMBUS_VIRT_RESET_IOUT_HISTORY:

		ret = pmbus_write_word_data(client, page,

					    MAX34440_MFR_IOUT_PEAK, 0);

		break;

	case PMBUS_VIRT_RESET_TEMP_HISTORY:

		ret = pmbus_write_word_data(client, page,

					    MAX34440_MFR_TEMPERATURE_PEAK,

					    0xffff);

		break;

	default:

		ret = -ENODATA;

		break;

	}

	return ret;

}



static int max34440_read_byte_data(struct i2c_client *client, int page, int reg)

{

	int ret;
@@ -109,6 +168,8 @@ static struct pmbus_driver_info max34440_info[] = { 
		.func[12] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,

		.func[13] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,

		.read_byte_data = max34440_read_byte_data,

		.read_word_data = max34440_read_word_data,

		.write_word_data = max34440_write_word_data,

	},

	[max34441] = {

		.pages = 12,
@@ -150,6 +211,8 @@ static struct pmbus_driver_info max34440_info[] = { 
		.func[10] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,

		.func[11] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,

		.read_byte_data = max34440_read_byte_data,

		.read_word_data = max34440_read_word_data,

		.write_word_data = max34440_write_word_data,

	},

};