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authorGuenter Roeck <linux@roeck-us.net>2016-06-20 04:15:05 +0200
committerGuenter Roeck <linux@roeck-us.net>2016-09-09 06:34:17 +0200
commit08b024338166abebcc2216f97693336f7ac0bf42 (patch)
tree9517c56cdf8f35abf90ae6094b945312ee3b5bea /drivers/hwmon/lm75.c
parenthwmon: (xgene) Fix crash when alarm occurs before driver probe (diff)
downloadlinux-08b024338166abebcc2216f97693336f7ac0bf42.tar.xz
linux-08b024338166abebcc2216f97693336f7ac0bf42.zip
hwmon: (lm75) Convert to use new hwmon registration API
Simplify code and reduce code size by using the new hwmon registration API. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/lm75.c')
-rw-r--r--drivers/hwmon/lm75.c185
1 files changed, 116 insertions, 69 deletions
diff --git a/drivers/hwmon/lm75.c b/drivers/hwmon/lm75.c
index 92f9d4bbf597..eff3b24d8473 100644
--- a/drivers/hwmon/lm75.c
+++ b/drivers/hwmon/lm75.c
@@ -28,7 +28,6 @@
#include <linux/err.h>
#include <linux/of.h>
#include <linux/regmap.h>
-#include <linux/thermal.h>
#include "lm75.h"
@@ -88,56 +87,75 @@ static inline long lm75_reg_to_mc(s16 temp, u8 resolution)
return ((temp >> (16 - resolution)) * 1000) >> (resolution - 8);
}
-/* sysfs attributes for hwmon */
-
-static int lm75_read_temp(void *dev, int *temp)
+static int lm75_read(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long *val)
{
struct lm75_data *data = dev_get_drvdata(dev);
- unsigned int _temp;
- int err;
-
- err = regmap_read(data->regmap, LM75_REG_TEMP, &_temp);
- if (err < 0)
- return err;
-
- *temp = lm75_reg_to_mc(_temp, data->resolution);
-
+ unsigned int regval;
+ int err, reg;
+
+ switch (type) {
+ case hwmon_chip:
+ switch (attr) {
+ case hwmon_chip_update_interval:
+ *val = data->sample_time;
+ break;;
+ default:
+ return -EINVAL;
+ }
+ break;
+ case hwmon_temp:
+ switch (attr) {
+ case hwmon_temp_input:
+ reg = LM75_REG_TEMP;
+ break;
+ case hwmon_temp_max:
+ reg = LM75_REG_MAX;
+ break;
+ case hwmon_temp_max_hyst:
+ reg = LM75_REG_HYST;
+ break;
+ default:
+ return -EINVAL;
+ }
+ err = regmap_read(data->regmap, reg, &regval);
+ if (err < 0)
+ return err;
+
+ *val = lm75_reg_to_mc(regval, data->resolution);
+ break;
+ default:
+ return -EINVAL;
+ }
return 0;
}
-static ssize_t show_temp(struct device *dev, struct device_attribute *da,
- char *buf)
+static int lm75_write(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long temp)
{
- struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct lm75_data *data = dev_get_drvdata(dev);
- unsigned int temp = 0;
- int err;
-
- err = regmap_read(data->regmap, attr->index, &temp);
- if (err < 0)
- return err;
-
- return sprintf(buf, "%ld\n", lm75_reg_to_mc(temp, data->resolution));
-}
-
-static ssize_t set_temp(struct device *dev, struct device_attribute *da,
- const char *buf, size_t count)
-{
- struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
- struct lm75_data *data = dev_get_drvdata(dev);
- long temp;
- int error;
u8 resolution;
+ int reg;
+
+ if (type != hwmon_temp)
+ return -EINVAL;
- error = kstrtol(buf, 10, &temp);
- if (error)
- return error;
+ switch (attr) {
+ case hwmon_temp_max:
+ reg = LM75_REG_MAX;
+ break;
+ case hwmon_temp_max_hyst:
+ reg = LM75_REG_HYST;
+ break;
+ default:
+ return -EINVAL;
+ }
/*
* Resolution of limit registers is assumed to be the same as the
* temperature input register resolution unless given explicitly.
*/
- if (attr->index && data->resolution_limits)
+ if (data->resolution_limits)
resolution = data->resolution_limits;
else
resolution = data->resolution;
@@ -145,45 +163,77 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *da,
temp = clamp_val(temp, LM75_TEMP_MIN, LM75_TEMP_MAX);
temp = DIV_ROUND_CLOSEST(temp << (resolution - 8),
1000) << (16 - resolution);
- error = regmap_write(data->regmap, attr->index, temp);
- if (error < 0)
- return error;
- return count;
+ return regmap_write(data->regmap, reg, temp);
}
-static ssize_t show_update_interval(struct device *dev,
- struct device_attribute *da, char *buf)
+static umode_t lm75_is_visible(const void *data, enum hwmon_sensor_types type,
+ u32 attr, int channel)
{
- struct lm75_data *data = dev_get_drvdata(dev);
-
- return sprintf(buf, "%u\n", data->sample_time);
+ switch (type) {
+ case hwmon_chip:
+ switch (attr) {
+ case hwmon_chip_update_interval:
+ return S_IRUGO;
+ }
+ break;
+ case hwmon_temp:
+ switch (attr) {
+ case hwmon_temp_input:
+ return S_IRUGO;
+ case hwmon_temp_max:
+ case hwmon_temp_max_hyst:
+ return S_IRUGO | S_IWUSR;
+ }
+ break;
+ default:
+ break;
+ }
+ return 0;
}
-static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
- show_temp, set_temp, LM75_REG_MAX);
-static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO,
- show_temp, set_temp, LM75_REG_HYST);
-static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, LM75_REG_TEMP);
-static DEVICE_ATTR(update_interval, S_IRUGO, show_update_interval, NULL);
+/*-----------------------------------------------------------------------*/
-static struct attribute *lm75_attrs[] = {
- &sensor_dev_attr_temp1_input.dev_attr.attr,
- &sensor_dev_attr_temp1_max.dev_attr.attr,
- &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
- &dev_attr_update_interval.attr,
+/* device probe and removal */
- NULL
+/* chip configuration */
+
+static const u32 lm75_chip_config[] = {
+ HWMON_C_REGISTER_TZ | HWMON_C_UPDATE_INTERVAL,
+ 0
};
-ATTRIBUTE_GROUPS(lm75);
-static const struct thermal_zone_of_device_ops lm75_of_thermal_ops = {
- .get_temp = lm75_read_temp,
+static const struct hwmon_channel_info lm75_chip = {
+ .type = hwmon_chip,
+ .config = lm75_chip_config,
};
-/*-----------------------------------------------------------------------*/
+static const u32 lm75_temp_config[] = {
+ HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST,
+ 0
+};
-/* device probe and removal */
+static const struct hwmon_channel_info lm75_temp = {
+ .type = hwmon_temp,
+ .config = lm75_temp_config,
+};
+
+static const struct hwmon_channel_info *lm75_info[] = {
+ &lm75_chip,
+ &lm75_temp,
+ NULL
+};
+
+static const struct hwmon_ops lm75_hwmon_ops = {
+ .is_visible = lm75_is_visible,
+ .read = lm75_read,
+ .write = lm75_write,
+};
+
+static const struct hwmon_chip_info lm75_chip_info = {
+ .ops = &lm75_hwmon_ops,
+ .info = lm75_info,
+};
static bool lm75_is_writeable_reg(struct device *dev, unsigned int reg)
{
@@ -337,15 +387,12 @@ lm75_probe(struct i2c_client *client, const struct i2c_device_id *id)
dev_dbg(dev, "Config %02x\n", new);
- hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
- data, lm75_groups);
+ hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,
+ data, &lm75_chip_info,
+ NULL);
if (IS_ERR(hwmon_dev))
return PTR_ERR(hwmon_dev);
- devm_thermal_zone_of_sensor_register(hwmon_dev, 0,
- hwmon_dev,
- &lm75_of_thermal_ops);
-
dev_info(dev, "%s: sensor '%s'\n", dev_name(hwmon_dev), client->name);
return 0;