* and adt7410.c from iio-staging by Sonic Zhang <sonic.zhang@analog.com>
*/
+#include <linux/device.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/hwmon.h>
-#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/delay.h>
/* Each client has this additional data */
struct adt7x10_data {
struct regmap *regmap;
- const char *name;
- struct device *hwmon_dev;
struct mutex update_lock;
u8 config;
u8 oldconfig;
bool valid; /* true if temperature valid */
};
-static const u8 ADT7X10_REG_TEMP[4] = {
- ADT7X10_TEMPERATURE, /* input */
- ADT7X10_T_ALARM_HIGH, /* high */
- ADT7X10_T_ALARM_LOW, /* low */
- ADT7X10_T_CRIT, /* critical */
+enum {
+ adt7x10_temperature = 0,
+ adt7x10_t_alarm_high,
+ adt7x10_t_alarm_low,
+ adt7x10_t_crit,
+};
+
+static const u8 ADT7X10_REG_TEMP[] = {
+ [adt7x10_temperature] = ADT7X10_TEMPERATURE, /* input */
+ [adt7x10_t_alarm_high] = ADT7X10_T_ALARM_HIGH, /* high */
+ [adt7x10_t_alarm_low] = ADT7X10_T_ALARM_LOW, /* low */
+ [adt7x10_t_crit] = ADT7X10_T_CRIT, /* critical */
};
static irqreturn_t adt7x10_irq_handler(int irq, void *private)
/*-----------------------------------------------------------------------*/
-/* sysfs attributes for hwmon */
-
-static ssize_t adt7x10_temp_show(struct device *dev,
- struct device_attribute *da, char *buf)
+static int adt7x10_temp_read(struct adt7x10_data *data, int index, long *val)
{
- struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
- struct adt7x10_data *data = dev_get_drvdata(dev);
- unsigned int val;
+ unsigned int regval;
int ret;
mutex_lock(&data->update_lock);
- if (attr->index == 0 && !data->valid) {
+ if (index == adt7x10_temperature && !data->valid) {
/* wait for valid temperature */
ret = adt7x10_temp_ready(data->regmap);
if (ret) {
}
mutex_unlock(&data->update_lock);
- ret = regmap_read(data->regmap, ADT7X10_REG_TEMP[attr->index], &val);
+ ret = regmap_read(data->regmap, ADT7X10_REG_TEMP[index], ®val);
if (ret)
return ret;
- return sprintf(buf, "%d\n", ADT7X10_REG_TO_TEMP(data, val));
+ *val = ADT7X10_REG_TO_TEMP(data, regval);
+ return 0;
}
-static ssize_t adt7x10_temp_store(struct device *dev,
- struct device_attribute *da,
- const char *buf, size_t count)
+static int adt7x10_temp_write(struct adt7x10_data *data, int index, long temp)
{
- struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
- struct adt7x10_data *data = dev_get_drvdata(dev);
- int nr = attr->index;
- long temp;
int ret;
- ret = kstrtol(buf, 10, &temp);
- if (ret)
- return ret;
-
mutex_lock(&data->update_lock);
- ret = regmap_write(data->regmap, ADT7X10_REG_TEMP[nr],
+ ret = regmap_write(data->regmap, ADT7X10_REG_TEMP[index],
ADT7X10_TEMP_TO_REG(temp));
mutex_unlock(&data->update_lock);
- return ret ? : count;
+ return ret;
}
-static ssize_t adt7x10_t_hyst_show(struct device *dev,
- struct device_attribute *da, char *buf)
+static int adt7x10_hyst_read(struct adt7x10_data *data, int index, long *val)
{
- struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
- struct adt7x10_data *data = dev_get_drvdata(dev);
- int nr = attr->index;
int hyst, temp, ret;
mutex_lock(&data->update_lock);
return ret;
}
- ret = regmap_read(data->regmap, ADT7X10_REG_TEMP[nr], &temp);
+ ret = regmap_read(data->regmap, ADT7X10_REG_TEMP[index], &temp);
mutex_unlock(&data->update_lock);
if (ret)
return ret;
* hysteresis is stored as a 4 bit offset in the device, convert it
* to an absolute value
*/
- if (nr == 2) /* min has positive offset, others have negative */
+ /* min has positive offset, others have negative */
+ if (index == adt7x10_t_alarm_low)
hyst = -hyst;
- return sprintf(buf, "%d\n", ADT7X10_REG_TO_TEMP(data, temp) - hyst);
+ *val = ADT7X10_REG_TO_TEMP(data, temp) - hyst;
+ return 0;
}
-static ssize_t adt7x10_t_hyst_store(struct device *dev,
- struct device_attribute *da,
- const char *buf, size_t count)
+static int adt7x10_hyst_write(struct adt7x10_data *data, long hyst)
{
- struct adt7x10_data *data = dev_get_drvdata(dev);
unsigned int regval;
int limit, ret;
- long hyst;
-
- ret = kstrtol(buf, 10, &hyst);
- if (ret)
- return ret;
mutex_lock(&data->update_lock);
ret = regmap_write(data->regmap, ADT7X10_T_HYST, regval);
abort:
mutex_unlock(&data->update_lock);
- return ret ? : count;
+ return ret;
}
-static ssize_t adt7x10_alarm_show(struct device *dev,
- struct device_attribute *da, char *buf)
+static int adt7x10_alarm_read(struct adt7x10_data *data, int index, long *val)
{
- struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
- struct adt7x10_data *data = dev_get_drvdata(dev);
unsigned int status;
int ret;
if (ret < 0)
return ret;
- return sprintf(buf, "%d\n", !!(status & attr->index));
+ *val = !!(status & index);
+
+ return 0;
}
-static ssize_t name_show(struct device *dev, struct device_attribute *da,
- char *buf)
+static umode_t adt7x10_is_visible(const void *data,
+ enum hwmon_sensor_types type,
+ u32 attr, int channel)
+{
+ switch (attr) {
+ case hwmon_temp_max:
+ case hwmon_temp_min:
+ case hwmon_temp_crit:
+ case hwmon_temp_max_hyst:
+ return 0644;
+ case hwmon_temp_input:
+ case hwmon_temp_min_alarm:
+ case hwmon_temp_max_alarm:
+ case hwmon_temp_crit_alarm:
+ case hwmon_temp_min_hyst:
+ case hwmon_temp_crit_hyst:
+ return 0444;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static int adt7x10_read(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long *val)
{
struct adt7x10_data *data = dev_get_drvdata(dev);
- return sprintf(buf, "%s\n", data->name);
+ switch (attr) {
+ case hwmon_temp_input:
+ return adt7x10_temp_read(data, adt7x10_temperature, val);
+ case hwmon_temp_max:
+ return adt7x10_temp_read(data, adt7x10_t_alarm_high, val);
+ case hwmon_temp_min:
+ return adt7x10_temp_read(data, adt7x10_t_alarm_low, val);
+ case hwmon_temp_crit:
+ return adt7x10_temp_read(data, adt7x10_t_crit, val);
+ case hwmon_temp_max_hyst:
+ return adt7x10_hyst_read(data, adt7x10_t_alarm_high, val);
+ case hwmon_temp_min_hyst:
+ return adt7x10_hyst_read(data, adt7x10_t_alarm_low, val);
+ case hwmon_temp_crit_hyst:
+ return adt7x10_hyst_read(data, adt7x10_t_crit, val);
+ case hwmon_temp_min_alarm:
+ return adt7x10_alarm_read(data, ADT7X10_STAT_T_LOW, val);
+ case hwmon_temp_max_alarm:
+ return adt7x10_alarm_read(data, ADT7X10_STAT_T_HIGH, val);
+ case hwmon_temp_crit_alarm:
+ return adt7x10_alarm_read(data, ADT7X10_STAT_T_CRIT, val);
+ default:
+ return -EOPNOTSUPP;
+ }
}
-static SENSOR_DEVICE_ATTR_RO(temp1_input, adt7x10_temp, 0);
-static SENSOR_DEVICE_ATTR_RW(temp1_max, adt7x10_temp, 1);
-static SENSOR_DEVICE_ATTR_RW(temp1_min, adt7x10_temp, 2);
-static SENSOR_DEVICE_ATTR_RW(temp1_crit, adt7x10_temp, 3);
-static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, adt7x10_t_hyst, 1);
-static SENSOR_DEVICE_ATTR_RO(temp1_min_hyst, adt7x10_t_hyst, 2);
-static SENSOR_DEVICE_ATTR_RO(temp1_crit_hyst, adt7x10_t_hyst, 3);
-static SENSOR_DEVICE_ATTR_RO(temp1_min_alarm, adt7x10_alarm,
- ADT7X10_STAT_T_LOW);
-static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, adt7x10_alarm,
- ADT7X10_STAT_T_HIGH);
-static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, adt7x10_alarm,
- ADT7X10_STAT_T_CRIT);
-static DEVICE_ATTR_RO(name);
-
-static struct attribute *adt7x10_attributes[] = {
- &sensor_dev_attr_temp1_input.dev_attr.attr,
- &sensor_dev_attr_temp1_max.dev_attr.attr,
- &sensor_dev_attr_temp1_min.dev_attr.attr,
- &sensor_dev_attr_temp1_crit.dev_attr.attr,
- &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
- &sensor_dev_attr_temp1_min_hyst.dev_attr.attr,
- &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
- &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
- &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
- &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
- NULL
+static int adt7x10_write(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long val)
+{
+ struct adt7x10_data *data = dev_get_drvdata(dev);
+
+ switch (attr) {
+ case hwmon_temp_max:
+ return adt7x10_temp_write(data, adt7x10_t_alarm_high, val);
+ case hwmon_temp_min:
+ return adt7x10_temp_write(data, adt7x10_t_alarm_low, val);
+ case hwmon_temp_crit:
+ return adt7x10_temp_write(data, adt7x10_t_crit, val);
+ case hwmon_temp_max_hyst:
+ return adt7x10_hyst_write(data, val);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static const struct hwmon_channel_info *adt7x10_info[] = {
+ HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MIN |
+ HWMON_T_CRIT | HWMON_T_MAX_HYST | HWMON_T_MIN_HYST |
+ HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
+ HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM),
+ NULL,
+};
+
+static const struct hwmon_ops adt7x10_hwmon_ops = {
+ .is_visible = adt7x10_is_visible,
+ .read = adt7x10_read,
+ .write = adt7x10_write,
};
-static const struct attribute_group adt7x10_group = {
- .attrs = adt7x10_attributes,
+static const struct hwmon_chip_info adt7x10_chip_info = {
+ .ops = &adt7x10_hwmon_ops,
+ .info = adt7x10_info,
};
static void adt7x10_restore_config(void *private)
{
struct adt7x10_data *data;
unsigned int config;
+ struct device *hdev;
int ret;
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
return -ENOMEM;
data->regmap = regmap;
- data->name = name;
dev_set_drvdata(dev, data);
mutex_init(&data->update_lock);
}
dev_dbg(dev, "Config %02x\n", data->config);
- /* Register sysfs hooks */
- ret = sysfs_create_group(&dev->kobj, &adt7x10_group);
- if (ret)
- return ret;
-
- /*
- * The I2C device will already have it's own 'name' attribute, but for
- * the SPI device we need to register it. name will only be non NULL if
- * the device doesn't register the 'name' attribute on its own.
- */
- if (name) {
- ret = device_create_file(dev, &dev_attr_name);
- if (ret)
- goto exit_remove;
- }
-
- data->hwmon_dev = hwmon_device_register(dev);
- if (IS_ERR(data->hwmon_dev)) {
- ret = PTR_ERR(data->hwmon_dev);
- goto exit_remove_name;
- }
+ hdev = devm_hwmon_device_register_with_info(dev, name, data,
+ &adt7x10_chip_info, NULL);
+ if (IS_ERR(hdev))
+ return PTR_ERR(hdev);
if (irq > 0) {
ret = request_threaded_irq(irq, NULL, adt7x10_irq_handler,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
dev_name(dev), dev);
if (ret)
- goto exit_hwmon_device_unregister;
+ return ret;
}
return 0;
-
-exit_hwmon_device_unregister:
- hwmon_device_unregister(data->hwmon_dev);
-exit_remove_name:
- if (name)
- device_remove_file(dev, &dev_attr_name);
-exit_remove:
- sysfs_remove_group(&dev->kobj, &adt7x10_group);
- return ret;
}
EXPORT_SYMBOL_GPL(adt7x10_probe);
void adt7x10_remove(struct device *dev, int irq)
{
- struct adt7x10_data *data = dev_get_drvdata(dev);
-
if (irq > 0)
free_irq(irq, dev);
-
- hwmon_device_unregister(data->hwmon_dev);
- if (data->name)
- device_remove_file(dev, &dev_attr_name);
- sysfs_remove_group(&dev->kobj, &adt7x10_group);
}
EXPORT_SYMBOL_GPL(adt7x10_remove);
projects / platform / kernel / linux-rpi.git / commitdiff