[PATCH 2/2 v3] HID: leds: move led_mode attribute to led-class devices in MSI GT683R driver

[Janne Kanniainen]

Move led_mode attribute from HID device to led-class devices and rename it
msi_mode. This will also fix race condition by using attribute-groups.

Signed-off-by: Janne Kanniainen <janne.kanniainen@xxxxxxxxx>
---

Changes in v3:
	- Style fixes
	- Rename sysfs-class-hid-driver-gt683r to sysfs-class-leds-driver-gt683r

 .../ABI/testing/sysfs-class-hid-driver-gt683r      | 14 -----------
 .../ABI/testing/sysfs-class-leds-driver-gt683r     | 16 +++++++++++++
 drivers/hid/hid-gt683r.c                           | 28 ++++++++++++----------
 3 files changed, 32 insertions(+), 26 deletions(-)
 delete mode 100644 Documentation/ABI/testing/sysfs-class-hid-driver-gt683r
 create mode 100644 Documentation/ABI/testing/sysfs-class-leds-driver-gt683r

diff --git a/Documentation/ABI/testing/sysfs-class-hid-driver-gt683r b/Documentation/ABI/testing/sysfs-class-hid-driver-gt683r
deleted file mode 100644
index 317e9d5..0000000
--- a/Documentation/ABI/testing/sysfs-class-hid-driver-gt683r
+++ /dev/null
@@ -1,14 +0,0 @@
-What:		/sys/class/hidraw/<hidraw>/device/leds_mode
-Date:		Jun 2014
-KernelVersion:	3.17
-Contact:	Janne Kanniainen <janne.kanniainen@xxxxxxxxx>
-Description:
-		Set the mode of LEDs
-
-		0 - normal
-		1 - audio
-		2 - breathing
-
-		Normal: LEDs are fully on when enabled
-		Audio:  LEDs brightness depends on sound level
-		Breathing: LEDs brightness varies at human breathing rate
\ No newline at end of file
diff --git a/Documentation/ABI/testing/sysfs-class-leds-driver-gt683r b/Documentation/ABI/testing/sysfs-class-leds-driver-gt683r
new file mode 100644
index 0000000..29769fb
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-leds-driver-gt683r
@@ -0,0 +1,16 @@
+What:		/sys/class/leds/<led>/msi_mode
+Date:		Jun 2014
+KernelVersion:	3.17
+Contact:	Janne Kanniainen <janne.kanniainen@xxxxxxxxx>
+Description:
+		Set the mode of LEDs. You should notice that changing the mode
+		of one LED will update the mode of its two sibling devices as
+		well.
+
+		0 - normal
+		1 - audio
+		2 - breathing
+
+		Normal: LEDs are fully on when enabled
+		Audio:  LEDs brightness depends on sound level
+		Breathing: LEDs brightness varies at human breathing rate
\ No newline at end of file
diff --git a/drivers/hid/hid-gt683r.c b/drivers/hid/hid-gt683r.c
index 073bd80..ba27ee1 100644
--- a/drivers/hid/hid-gt683r.c
+++ b/drivers/hid/hid-gt683r.c
@@ -84,12 +84,13 @@ static void gt683r_brightness_set(struct led_classdev *led_cdev,
 	}
 }
 
-static ssize_t leds_mode_show(struct device *dev,
+static ssize_t msi_mode_show(struct device *dev,
 				struct device_attribute *attr,
 				char *buf)
 {
 	u8 sysfs_mode;
-	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
+	struct hid_device *hdev = container_of(dev->parent,
+					struct hid_device, dev);
 	struct gt683r_led *led = hid_get_drvdata(hdev);
 
 	if (led->mode == GT683R_LED_NORMAL)
@@ -102,12 +103,13 @@ static ssize_t leds_mode_show(struct device *dev,
 	return scnprintf(buf, PAGE_SIZE, "%u\n", sysfs_mode);
 }
 
-static ssize_t leds_mode_store(struct device *dev,
+static ssize_t msi_mode_store(struct device *dev,
 				struct device_attribute *attr,
 				const char *buf, size_t count)
 {
 	u8 sysfs_mode;
-	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
+	struct hid_device *hdev = container_of(dev->parent,
+					struct hid_device, dev);
 	struct gt683r_led *led = hid_get_drvdata(hdev);
 
 
@@ -212,7 +214,14 @@ fail:
 	mutex_unlock(&led->lock);
 }
 
-static DEVICE_ATTR_RW(leds_mode);
+static DEVICE_ATTR_RW(msi_mode);
+
+static struct attribute *gt683r_led_attrs[] = {
+	&dev_attr_msi_mode.attr,
+	NULL
+};
+
+ATTRIBUTE_GROUPS(gt683r_led);
 
 static int gt683r_led_probe(struct hid_device *hdev,
 			const struct hid_device_id *id)
@@ -261,6 +270,8 @@ static int gt683r_led_probe(struct hid_device *hdev,
 		led->led_devs[i].name = name;
 		led->led_devs[i].max_brightness = 1;
 		led->led_devs[i].brightness_set = gt683r_brightness_set;
+		led->led_devs[i].groups = gt683r_led_groups;
+
 		ret = led_classdev_register(&hdev->dev, &led->led_devs[i]);
 		if (ret) {
 			hid_err(hdev, "could not register led device\n");
@@ -268,12 +279,6 @@ static int gt683r_led_probe(struct hid_device *hdev,
 		}
 	}
 
-	ret = device_create_file(&led->hdev->dev, &dev_attr_leds_mode);
-	if (ret) {
-		hid_err(hdev, "could not make mode attribute file\n");
-		goto fail;
-	}
-
 	return 0;
 
 fail:
@@ -288,7 +293,6 @@ static void gt683r_led_remove(struct hid_device *hdev)
 	int i;
 	struct gt683r_led *led = hid_get_drvdata(hdev);
 
-	device_remove_file(&hdev->dev, &dev_attr_leds_mode);
 	for (i = 0; i < GT683R_LED_COUNT; i++)
 		led_classdev_unregister(&led->led_devs[i]);
 	flush_work(&led->work);
-- 
1.9.2

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