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hwmon: (emc1403) Add support for conversion interval configuration

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The chips supported by the emc1403 driver support configurable
conversion rates. Add support for it.

Cc: Lars Petter Mostad <lars.petter.mostad@appear.net>
Tested-by: Lars Petter Mostad <lars.petter.mostad@appear.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck
2024-05-03 08:04:43 -07:00
parent e77b204ad4
commit 6a8157812f
1 changed files with 67 additions and 0 deletions
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67
drivers/hwmon/emc1403.c
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@@ -19,6 +19,7 @@
#include <linux/sysfs.h>
#include <linux/mutex.h>
#include <linux/regmap.h>
#include <linux/util_macros.h>
#define THERMAL_PID_REG 0xfd
#define THERMAL_SMSC_ID_REG 0xfe
@@ -333,6 +334,31 @@ static int emc1403_temp_read(struct thermal_data *data, u32 attr, int channel, l
return ret;
}
static int emc1403_get_convrate(struct thermal_data *data, long *val)
{
unsigned int convrate;
int ret;
ret = regmap_read(data->regmap, 0x04, &convrate);
if (ret < 0)
return ret;
if (convrate > 10)
convrate = 4;
*val = 16000 >> convrate;
return 0;
}
static int emc1403_chip_read(struct thermal_data *data, u32 attr, long *val)
{
switch (attr) {
case hwmon_chip_update_interval:
return emc1403_get_convrate(data, val);
default:
return -EOPNOTSUPP;
}
}
static int emc1403_read(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long *val)
{
@@ -341,6 +367,8 @@ static int emc1403_read(struct device *dev, enum hwmon_sensor_types type,
switch (type) {
case hwmon_temp:
return emc1403_temp_read(data, attr, channel, val);
case hwmon_chip:
return emc1403_chip_read(data, attr, val);
default:
return -EOPNOTSUPP;
}
@@ -409,6 +437,30 @@ static int emc1403_temp_write(struct thermal_data *data, u32 attr, int channel,
}
}
/* Lookup table for temperature conversion times in msec */
static const u16 ina3221_conv_time[] = {
16000, 8000, 4000, 2000, 1000, 500, 250, 125, 62, 31, 16
};
static int emc1403_set_convrate(struct thermal_data *data, unsigned int interval)
{
int convrate;
convrate = find_closest_descending(interval, ina3221_conv_time,
ARRAY_SIZE(ina3221_conv_time));
return regmap_write(data->regmap, 0x04, convrate);
}
static int emc1403_chip_write(struct thermal_data *data, u32 attr, long val)
{
switch (attr) {
case hwmon_chip_update_interval:
return emc1403_set_convrate(data, clamp_val(val, 0, 100000));
default:
return -EOPNOTSUPP;
}
}
static int emc1403_write(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long val)
{
@@ -417,6 +469,8 @@ static int emc1403_write(struct device *dev, enum hwmon_sensor_types type,
switch (type) {
case hwmon_temp:
return emc1403_temp_write(data, attr, channel, val);
case hwmon_chip:
return emc1403_chip_write(data, attr, val);
default:
return -EOPNOTSUPP;
}
@@ -453,18 +507,31 @@ static umode_t emc1403_temp_is_visible(const void *_data, u32 attr, int channel)
}
}
static umode_t emc1403_chip_is_visible(const void *_data, u32 attr)
{
switch (attr) {
case hwmon_chip_update_interval:
return 0644;
default:
return 0;
}
}
static umode_t emc1403_is_visible(const void *data, enum hwmon_sensor_types type,
u32 attr, int channel)
{
switch (type) {
case hwmon_temp:
return emc1403_temp_is_visible(data, attr, channel);
case hwmon_chip:
return emc1403_chip_is_visible(data, attr);
default:
return 0;
}
}
static const struct hwmon_channel_info * const emc1403_info[] = {
HWMON_CHANNEL_INFO(chip, HWMON_C_UPDATE_INTERVAL),
HWMON_CHANNEL_INFO(temp,
HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |