Simplify the code and create mandatory 'name' attribute by using
new hwmon API.
Also use is_visible to determine visible attributes instead of creating
several different attribute groups.
Signed-off-by: Guenter Roeck <li...@roeck-us.net>
---
Compiled tested only.
drivers/input/touchscreen/ads7846.c | 97 +++++++++--------------------------
1 file changed, 24 insertions(+), 73 deletions(-)
diff --git a/drivers/input/touchscreen/ads7846.c
b/drivers/input/touchscreen/ads7846.c
index ea19536..38acc4c 100644
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c
@@ -101,11 +101,6 @@ struct ads7846 {
struct spi_device *spi;
struct regulator *reg;
-#if defined(CONFIG_HWMON) || defined(CONFIG_HWMON_MODULE)
- struct attribute_group *attr_group;
- struct device *hwmon;
-#endif
-
u16 model;
u16 vref_mv;
u16 vref_delay_usecs;
@@ -479,41 +474,37 @@ static inline unsigned vbatt_adjust(struct ads7846 *ts,
ssize_t v)
SHOW(in0_input, vaux, vaux_adjust)
SHOW(in1_input, vbatt, vbatt_adjust)
-static struct attribute *ads7846_attributes[] = {
- &dev_attr_temp0.attr,
- &dev_attr_temp1.attr,
- &dev_attr_in0_input.attr,
- &dev_attr_in1_input.attr,
- NULL,
-};
-
-static struct attribute_group ads7846_attr_group = {
- .attrs = ads7846_attributes,
-};
+static umode_t ads7846_is_visible(struct kobject *kobj, struct attribute *attr,
+ int index)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct ads7846 *ts = dev_get_drvdata(dev);
-static struct attribute *ads7843_attributes[] = {
- &dev_attr_in0_input.attr,
- &dev_attr_in1_input.attr,
- NULL,
-};
+ if (ts->model == 7843 && index < 2) /* in0, in1 */
+ return 0;
+ if (ts->model == 7845 && index != 2) /* in0 */
+ return 0;
-static struct attribute_group ads7843_attr_group = {
- .attrs = ads7843_attributes,
-};
+ return attr->mode;
+}
-static struct attribute *ads7845_attributes[] = {
- &dev_attr_in0_input.attr,
+static struct attribute *ads7846_attributes[] = {
+ &dev_attr_temp0.attr, /* 0 */
+ &dev_attr_temp1.attr, /* 1 */
+ &dev_attr_in0_input.attr, /* 2 */
+ &dev_attr_in1_input.attr, /* 3 */
NULL,
};
-static struct attribute_group ads7845_attr_group = {
- .attrs = ads7845_attributes,
+static struct attribute_group ads7846_attr_group = {
+ .attrs = ads7846_attributes,
+ .is_visible = ads7846_is_visible,
};
+__ATTRIBUTE_GROUPS(ads7846_attr);
static int ads784x_hwmon_register(struct spi_device *spi, struct ads7846 *ts)
{
struct device *hwmon;
- int err;
/* hwmon sensors need a reference voltage */
switch (ts->model) {
@@ -535,56 +526,20 @@ static int ads784x_hwmon_register(struct spi_device *spi,
struct ads7846 *ts)
break;
}
- /* different chips have different sensor groups */
- switch (ts->model) {
- case 7846:
- ts->attr_group = &ads7846_attr_group;
- break;
- case 7845:
- ts->attr_group = &ads7845_attr_group;
- break;
- case 7843:
- ts->attr_group = &ads7843_attr_group;
- break;
- default:
- dev_dbg(&spi->dev, "ADS%d not recognized\n", ts->model);
- return 0;
- }
-
- err = sysfs_create_group(&spi->dev.kobj, ts->attr_group);
- if (err)
- return err;
-
- hwmon = hwmon_device_register(&spi->dev);
- if (IS_ERR(hwmon)) {
- sysfs_remove_group(&spi->dev.kobj, ts->attr_group);
+ hwmon = devm_hwmon_device_register_with_groups(&spi->dev, spi->modalias,
+ ts, ads7846_attr_groups);
+ if (IS_ERR(hwmon))
return PTR_ERR(hwmon);
- }
- ts->hwmon = hwmon;
return 0;
}
-static void ads784x_hwmon_unregister(struct spi_device *spi,
- struct ads7846 *ts)
-{
- if (ts->hwmon) {
- sysfs_remove_group(&spi->dev.kobj, ts->attr_group);
- hwmon_device_unregister(ts->hwmon);
- }
-}
-
#else
static inline int ads784x_hwmon_register(struct spi_device *spi,
struct ads7846 *ts)
{
return 0;
}
-
-static inline void ads784x_hwmon_unregister(struct spi_device *spi,
- struct ads7846 *ts)
-{
-}
#endif
static ssize_t ads7846_pen_down_show(struct device *dev,
@@ -1447,7 +1402,7 @@ static int ads7846_probe(struct spi_device *spi)
err = sysfs_create_group(&spi->dev.kobj, &ads784x_attr_group);
if (err)
- goto err_remove_hwmon;
+ goto err_free_irq;
err = input_register_device(input_dev);
if (err)
@@ -1466,8 +1421,6 @@ static int ads7846_probe(struct spi_device *spi)
err_remove_attr_group:
sysfs_remove_group(&spi->dev.kobj, &ads784x_attr_group);
- err_remove_hwmon:
- ads784x_hwmon_unregister(spi, ts);
err_free_irq:
free_irq(spi->irq, ts);
err_disable_regulator:
@@ -1500,8 +1453,6 @@ static int ads7846_remove(struct spi_device *spi)
input_unregister_device(ts->input);
- ads784x_hwmon_unregister(spi, ts);
-
regulator_disable(ts->reg);
regulator_put(ts->reg);
--
1.7.9.7
--
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