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hwmon: (max34440) Add support for peak attributes

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Add support for voltage, current, 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 13:17:43 -07:00
parent 70e94b276c
commit 98591dbe63
2 changed files with 69 additions and 0 deletions
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6
Documentation/hwmon/max34440
View file

@ -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.

63
drivers/hwmon/pmbus/max34440.c
View file

@ -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,
},
};