hwmon: (wm831x) Convert to devm_hwmon_device_register_with_groups
Use ATTRIBUTE_GROUPS macro and devm_hwmon_device_register_with_groups() to
simplify the code a bit.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
diff --git a/drivers/hwmon/wm831x-hwmon.c b/drivers/hwmon/wm831x-hwmon.c
index df6ceaf..3e6a319 100644
--- a/drivers/hwmon/wm831x-hwmon.c
+++ b/drivers/hwmon/wm831x-hwmon.c
@@ -29,17 +29,6 @@
#include <linux/mfd/wm831x/core.h>
#include <linux/mfd/wm831x/auxadc.h>
-struct wm831x_hwmon {
- struct wm831x *wm831x;
- struct device *classdev;
-};
-
-static ssize_t show_name(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- return sprintf(buf, "wm831x\n");
-}
-
static const char * const input_names[] = {
[WM831X_AUX_SYSVDD] = "SYSVDD",
[WM831X_AUX_USB] = "USB",
@@ -50,15 +39,14 @@
[WM831X_AUX_BATT_TEMP] = "Battery",
};
-
static ssize_t show_voltage(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct wm831x_hwmon *hwmon = dev_get_drvdata(dev);
+ struct wm831x *wm831x = dev_get_drvdata(dev);
int channel = to_sensor_dev_attr(attr)->index;
int ret;
- ret = wm831x_auxadc_read_uv(hwmon->wm831x, channel);
+ ret = wm831x_auxadc_read_uv(wm831x, channel);
if (ret < 0)
return ret;
@@ -68,11 +56,11 @@
static ssize_t show_chip_temp(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct wm831x_hwmon *hwmon = dev_get_drvdata(dev);
+ struct wm831x *wm831x = dev_get_drvdata(dev);
int channel = to_sensor_dev_attr(attr)->index;
int ret;
- ret = wm831x_auxadc_read(hwmon->wm831x, channel);
+ ret = wm831x_auxadc_read(wm831x, channel);
if (ret < 0)
return ret;
@@ -100,8 +88,6 @@
static SENSOR_DEVICE_ATTR(in##id##_label, S_IRUGO, show_label, \
NULL, name)
-static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
-
WM831X_VOLTAGE(0, WM831X_AUX_AUX1);
WM831X_VOLTAGE(1, WM831X_AUX_AUX2);
WM831X_VOLTAGE(2, WM831X_AUX_AUX3);
@@ -126,9 +112,7 @@
static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, show_label, NULL,
WM831X_AUX_BATT_TEMP);
-static struct attribute *wm831x_attributes[] = {
- &dev_attr_name.attr,
-
+static struct attribute *wm831x_attrs[] = {
&sensor_dev_attr_in0_input.dev_attr.attr,
&sensor_dev_attr_in1_input.dev_attr.attr,
&sensor_dev_attr_in2_input.dev_attr.attr,
@@ -153,55 +137,21 @@
NULL
};
-static const struct attribute_group wm831x_attr_group = {
- .attrs = wm831x_attributes,
-};
+ATTRIBUTE_GROUPS(wm831x);
static int wm831x_hwmon_probe(struct platform_device *pdev)
{
struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
- struct wm831x_hwmon *hwmon;
- int ret;
+ struct device *hwmon_dev;
- hwmon = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_hwmon),
- GFP_KERNEL);
- if (!hwmon)
- return -ENOMEM;
-
- hwmon->wm831x = wm831x;
-
- ret = sysfs_create_group(&pdev->dev.kobj, &wm831x_attr_group);
- if (ret)
- return ret;
-
- hwmon->classdev = hwmon_device_register(&pdev->dev);
- if (IS_ERR(hwmon->classdev)) {
- ret = PTR_ERR(hwmon->classdev);
- goto err_sysfs;
- }
-
- platform_set_drvdata(pdev, hwmon);
-
- return 0;
-
-err_sysfs:
- sysfs_remove_group(&pdev->dev.kobj, &wm831x_attr_group);
- return ret;
-}
-
-static int wm831x_hwmon_remove(struct platform_device *pdev)
-{
- struct wm831x_hwmon *hwmon = platform_get_drvdata(pdev);
-
- hwmon_device_unregister(hwmon->classdev);
- sysfs_remove_group(&pdev->dev.kobj, &wm831x_attr_group);
-
- return 0;
+ hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, "wm831x",
+ wm831x,
+ wm831x_groups);
+ return PTR_ERR_OR_ZERO(hwmon_dev);
}
static struct platform_driver wm831x_hwmon_driver = {
.probe = wm831x_hwmon_probe,
- .remove = wm831x_hwmon_remove,
.driver = {
.name = "wm831x-hwmon",
.owner = THIS_MODULE,