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hwmon: (max16064) Add support for peak attributes 

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

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Reviewed-by: Robert Coulson <robert.coulson@ericsson.com>
This commit is contained in:
Guenter Roeck 2011-07-09 13:10:19 -07:00
parent c576e30cd0
commit 8ebed85450
2 changed files with 55 additions and 0 deletions
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4
Documentation/hwmon/max16064
View File

@ -50,6 +50,8 @@ in[1-4]_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status.
in[1-4]_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status.
in[1-4]_lcrit_alarm Voltage critical low alarm. From VOLTAGE_UV_FAULT status.
in[1-4]_crit_alarm Voltage critical high alarm. From VOLTAGE_OV_FAULT status.
in[1-4]_highest Historical maximum voltage.
in[1-4]_reset_history Write any value to reset history.
temp1_input Measured temperature. From READ_TEMPERATURE_1 register.
temp1_max Maximum temperature. From OT_WARN_LIMIT register.
@ -60,3 +62,5 @@ temp1_max_alarm Chip temperature high alarm. Set by comparing
temp1_crit_alarm Chip temperature critical high alarm. Set by comparing
READ_TEMPERATURE_1 with OT_FAULT_LIMIT if TEMP_OT_FAULT
status is set.
temp1_highest Historical maximum temperature.
temp1_reset_history Write any value to reset history.

51
drivers/hwmon/pmbus/max16064.c
View File

@ -25,6 +25,55 @@
#include <linux/i2c.h>
#include "pmbus.h"
#define MAX16064_MFR_VOUT_PEAK 0xd4
#define MAX16064_MFR_TEMPERATURE_PEAK 0xd6
static int max16064_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,
MAX16064_MFR_VOUT_PEAK);
break;
case PMBUS_VIRT_READ_TEMP_MAX:
ret = pmbus_read_word_data(client, page,
MAX16064_MFR_TEMPERATURE_PEAK);
break;
case PMBUS_VIRT_RESET_VOUT_HISTORY:
case PMBUS_VIRT_RESET_TEMP_HISTORY:
ret = 0;
break;
default:
ret = -ENODATA;
break;
}
return ret;
}
static int max16064_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,
MAX16064_MFR_VOUT_PEAK, 0);
break;
case PMBUS_VIRT_RESET_TEMP_HISTORY:
ret = pmbus_write_word_data(client, page,
MAX16064_MFR_TEMPERATURE_PEAK,
0xffff);
break;
default:
ret = -ENODATA;
break;
}
return ret;
}
static struct pmbus_driver_info max16064_info = {
.pages = 4,
.format[PSC_VOLTAGE_IN] = direct,
@ -44,6 +93,8 @@ static struct pmbus_driver_info max16064_info = {
.func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
.func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
.func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
.read_word_data = max16064_read_word_data,
.write_word_data = max16064_write_word_data,
};
static int max16064_probe(struct i2c_client *client,