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hwmon: (max1619) Add support for update_interval attribute

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The chip supports reading and writing the conversion rate.
Add support for the update_interval sysfs attribute.

Reviewed-by: Tzung-Bi Shih <tzungbi@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2024-07-16 09:01:27 -07:00
parent f0b1f1f468
commit 13047ebe63
1 changed files with 42 additions and 8 deletions
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50
drivers/hwmon/max1619.c
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@ -18,6 +18,7 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/util_macros.h>
static const unsigned short normal_i2c[] = {
0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e, I2C_CLIENT_END };
@ -102,11 +103,20 @@ static int max1619_temp_read(struct regmap *regmap, u32 attr, int channel, long
return 0;
}
static u16 update_intervals[] = { 16000, 8000, 4000, 2000, 1000, 500, 250, 125 };
static int max1619_chip_read(struct regmap *regmap, u32 attr, long *val)
{
int alarms;
int alarms, ret;
u32 regval;
switch (attr) {
case hwmon_chip_update_interval:
ret = regmap_read(regmap, MAX1619_REG_CONVRATE, &regval);
if (ret < 0)
return ret;
*val = update_intervals[regval & 7];
break;
case hwmon_chip_alarms:
alarms = get_alarms(regmap);
if (alarms < 0)
@ -134,14 +144,21 @@ static int max1619_read(struct device *dev, enum hwmon_sensor_types type,
}
}
static int max1619_write(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long val)
static int max1619_chip_write(struct regmap *regmap, u32 attr, long val)
{
struct regmap *regmap = dev_get_drvdata(dev);
int reg;
if (type != hwmon_temp)
switch (attr) {
case hwmon_chip_update_interval:
val = find_closest_descending(val, update_intervals, ARRAY_SIZE(update_intervals));
return regmap_write(regmap, MAX1619_REG_CONVRATE, val);
default:
return -EOPNOTSUPP;
}
}
static int max1619_temp_write(struct regmap *regmap,
u32 attr, int channel, long val)
{
int reg;
switch (attr) {
case hwmon_temp_min:
@ -163,12 +180,29 @@ static int max1619_write(struct device *dev, enum hwmon_sensor_types type,
return regmap_write(regmap, reg, val);
}
static int max1619_write(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long val)
{
struct regmap *regmap = dev_get_drvdata(dev);
switch (type) {
case hwmon_chip:
return max1619_chip_write(regmap, attr, val);
case hwmon_temp:
return max1619_temp_write(regmap, attr, channel, val);
default:
return -EOPNOTSUPP;
}
}
static umode_t max1619_is_visible(const void *_data, enum hwmon_sensor_types type,
u32 attr, int channel)
{
switch (type) {
case hwmon_chip:
switch (attr) {
case hwmon_chip_update_interval:
return 0644;
case hwmon_chip_alarms:
return 0444;
default:
@ -200,7 +234,7 @@ static umode_t max1619_is_visible(const void *_data, enum hwmon_sensor_types typ
}
static const struct hwmon_channel_info * const max1619_info[] = {
HWMON_CHANNEL_INFO(chip, HWMON_C_ALARMS),
HWMON_CHANNEL_INFO(chip, HWMON_C_ALARMS | HWMON_C_UPDATE_INTERVAL),
HWMON_CHANNEL_INFO(temp,
HWMON_T_INPUT,
HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |