leds: flash: Remove synchronized flash strobe feature

Synchronized flash strobe feature has been considered not fitting
for LED subsystem sysfs interface and thus is being removed.

Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Bryan Wu <cooloney@gmail.com>

3 files changed, 0 insertions, 97 deletions

diff --git a/drivers/leds/led-class-flash.c b/drivers/leds/led-class-flash.c
index 4a19fd44f93f..3b2573411a37 100644
--- a/drivers/leds/led-class-flash.c
+++ b/drivers/leds/led-class-flash.c
@@ -216,75 +216,6 @@ static ssize_t flash_fault_show(struct device *dev,
 }
 static DEVICE_ATTR_RO(flash_fault);
 
-static ssize_t available_sync_leds_show(struct device *dev,
-                struct device_attribute *attr, char *buf)
-{
-        struct led_classdev *led_cdev = dev_get_drvdata(dev);
-        struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
-        char *pbuf = buf;
-        int i, buf_len;
-
-        buf_len = sprintf(pbuf, "[0: none] ");
-        pbuf += buf_len;
-
-        for (i = 0; i < fled_cdev->num_sync_leds; ++i) {
-                buf_len = sprintf(pbuf, "[%d: %s] ", i + 1,
-                                  fled_cdev->sync_leds[i]->led_cdev.name);
-                pbuf += buf_len;
-        }
-
-        return sprintf(buf, "%s\n", buf);
-}
-static DEVICE_ATTR_RO(available_sync_leds);
-
-static ssize_t flash_sync_strobe_store(struct device *dev,
-                struct device_attribute *attr, const char *buf, size_t size)
-{
-        struct led_classdev *led_cdev = dev_get_drvdata(dev);
-        struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
-        unsigned long led_id;
-        ssize_t ret;
-
-        mutex_lock(&led_cdev->led_access);
-
-        if (led_sysfs_is_disabled(led_cdev)) {
-                ret = -EBUSY;
-                goto unlock;
-        }
-
-        ret = kstrtoul(buf, 10, &led_id);
-        if (ret)
-                goto unlock;
-
-        if (led_id > fled_cdev->num_sync_leds) {
-                ret = -ERANGE;
-                goto unlock;
-        }
-
-        fled_cdev->sync_led_id = led_id;
-
-        ret = size;
-unlock:
-        mutex_unlock(&led_cdev->led_access);
-        return ret;
-}
-
-static ssize_t flash_sync_strobe_show(struct device *dev,
-                struct device_attribute *attr, char *buf)
-{
-        struct led_classdev *led_cdev = dev_get_drvdata(dev);
-        struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
-        int sled_id = fled_cdev->sync_led_id;
-        char *sync_led_name = "none";
-
-        if (fled_cdev->sync_led_id > 0)
-                sync_led_name = (char *)
-                        fled_cdev->sync_leds[sled_id - 1]->led_cdev.name;
-
-        return sprintf(buf, "[%d: %s]\n", sled_id, sync_led_name);
-}
-static DEVICE_ATTR_RW(flash_sync_strobe);
-
 static struct attribute *led_flash_strobe_attrs[] = {
         &dev_attr_flash_strobe.attr,
         NULL,
@@ -307,12 +238,6 @@ static struct attribute *led_flash_fault_attrs[] = {
         NULL,
 };
 
-static struct attribute *led_flash_sync_strobe_attrs[] = {
-        &dev_attr_available_sync_leds.attr,
-        &dev_attr_flash_sync_strobe.attr,
-        NULL,
-};
-
 static const struct attribute_group led_flash_strobe_group = {
         .attrs = led_flash_strobe_attrs,
 };
@@ -329,10 +254,6 @@ static const struct attribute_group led_flash_fault_group = {
         .attrs = led_flash_fault_attrs,
 };
 
-static const struct attribute_group led_flash_sync_strobe_group = {
-        .attrs = led_flash_sync_strobe_attrs,
-};
-
 static void led_flash_resume(struct led_classdev *led_cdev)
 {
         struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
@@ -361,9 +282,6 @@ static void led_flash_init_sysfs_groups(struct led_classdev_flash *fled_cdev)
         if (ops->fault_get)
                 flash_groups[num_sysfs_groups++] = &led_flash_fault_group;
 
-        if (led_cdev->flags & LED_DEV_CAP_SYNC_STROBE)
-                flash_groups[num_sysfs_groups++] = &led_flash_sync_strobe_group;
-
         led_cdev->groups = flash_groups;
 }
 
diff --git a/include/linux/led-class-flash.h b/include/linux/led-class-flash.h
index 3b5b9643cea1..21ec91e13c47 100644
--- a/include/linux/led-class-flash.h
+++ b/include/linux/led-class-flash.h
@@ -81,20 +81,6 @@ struct led_classdev_flash {
 
         /* LED Flash class sysfs groups */
         const struct attribute_group *sysfs_groups[LED_FLASH_MAX_SYSFS_GROUPS];
-
-        /* LEDs available for flash strobe synchronization */
-        struct led_classdev_flash **sync_leds;
-
-        /* Number of LEDs available for flash strobe synchronization */
-        int num_sync_leds;
-
-        /*
-         * The identifier of the sub-led to synchronize the flash strobe with.
-         * Identifiers start from 1, which reflects the first element from the
-         * sync_leds array. 0 means that the flash strobe should not be
-         * synchronized.
-         */
-        u32 sync_led_id;
 };
 
 static inline struct led_classdev_flash *lcdev_to_flcdev(
diff --git a/include/linux/leds.h b/include/linux/leds.h
index ed634279062e..9a2b000094cf 100644
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -47,7 +47,6 @@ struct led_classdev {
 #define SET_BRIGHTNESS_ASYNC    (1 << 21)
 #define SET_BRIGHTNESS_SYNC     (1 << 22)
 #define LED_DEV_CAP_FLASH       (1 << 23)
-#define LED_DEV_CAP_SYNC_STROBE (1 << 24)
 
         /* Set LED brightness level */
         /* Must not sleep, use a workqueue if needed */