backlight: Separate backlight properties from backlight ops pointers

Per device data such as brightness belongs to the indivdual device
and should therefore be separate from the the backlight operation
function pointers. This patch splits the two types of data and
allows simplifcation of some code.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>

6 files changed, 89 insertions, 115 deletions

diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index 822a373d3346..c65e81ff3578 100644
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c
@@ -35,14 +35,14 @@ static int fb_notifier_callback(struct notifier_block *self,
                 return 0;
 
         bd = container_of(self, struct backlight_device, fb_notif);
-        mutex_lock(&bd->props_lock);
-        if (bd->props)
-                if (!bd->props->check_fb ||
-                    bd->props->check_fb(evdata->info)) {
-                        bd->props->fb_blank = *(int *)evdata->data;
+        mutex_lock(&bd->ops_lock);
+        if (bd->ops)
+                if (!bd->ops->check_fb ||
+                    bd->ops->check_fb(evdata->info)) {
+                        bd->props.fb_blank = *(int *)evdata->data;
                         backlight_update_status(bd);
                 }
-        mutex_unlock(&bd->props_lock);
+        mutex_unlock(&bd->ops_lock);
         return 0;
 }
 
@@ -71,15 +71,9 @@ static inline void backlight_unregister_fb(struct backlight_device *bd)
 
 static ssize_t backlight_show_power(struct class_device *cdev, char *buf)
 {
-        int rc = -ENXIO;
         struct backlight_device *bd = to_backlight_device(cdev);
 
-        mutex_lock(&bd->props_lock);
-        if (bd->props)
-                rc = sprintf(buf, "%d\n", bd->props->power);
-        mutex_unlock(&bd->props_lock);
-
-        return rc;
+        return sprintf(buf, "%d\n", bd->props.power);
 }
 
 static ssize_t backlight_store_power(struct class_device *cdev, const char *buf, size_t count)
@@ -95,29 +89,23 @@ static ssize_t backlight_store_power(struct class_device *cdev, const char *buf,
         if (size != count)
                 return -EINVAL;
 
-        mutex_lock(&bd->props_lock);
-        if (bd->props) {
+        mutex_lock(&bd->ops_lock);
+        if (bd->ops) {
                 pr_debug("backlight: set power to %d\n", power);
-                bd->props->power = power;
+                bd->props.power = power;
                 backlight_update_status(bd);
                 rc = count;
         }
-        mutex_unlock(&bd->props_lock);
+        mutex_unlock(&bd->ops_lock);
 
         return rc;
 }
 
 static ssize_t backlight_show_brightness(struct class_device *cdev, char *buf)
 {
-        int rc = -ENXIO;
         struct backlight_device *bd = to_backlight_device(cdev);
 
-        mutex_lock(&bd->props_lock);
-        if (bd->props)
-                rc = sprintf(buf, "%d\n", bd->props->brightness);
-        mutex_unlock(&bd->props_lock);
-
-        return rc;
+        return sprintf(buf, "%d\n", bd->props.brightness);
 }
 
 static ssize_t backlight_store_brightness(struct class_device *cdev, const char *buf, size_t count)
@@ -133,34 +121,28 @@ static ssize_t backlight_store_brightness(struct class_device *cdev, const char
         if (size != count)
                 return -EINVAL;
 
-        mutex_lock(&bd->props_lock);
-        if (bd->props) {
-                if (brightness > bd->props->max_brightness)
+        mutex_lock(&bd->ops_lock);
+        if (bd->ops) {
+                if (brightness > bd->props.max_brightness)
                         rc = -EINVAL;
                 else {
                         pr_debug("backlight: set brightness to %d\n",
                                  brightness);
-                        bd->props->brightness = brightness;
+                        bd->props.brightness = brightness;
                         backlight_update_status(bd);
                         rc = count;
                 }
         }
-        mutex_unlock(&bd->props_lock);
+        mutex_unlock(&bd->ops_lock);
 
         return rc;
 }
 
 static ssize_t backlight_show_max_brightness(struct class_device *cdev, char *buf)
 {
-        int rc = -ENXIO;
         struct backlight_device *bd = to_backlight_device(cdev);
 
-        mutex_lock(&bd->props_lock);
-        if (bd->props)
-                rc = sprintf(buf, "%d\n", bd->props->max_brightness);
-        mutex_unlock(&bd->props_lock);
-
-        return rc;
+        return sprintf(buf, "%d\n", bd->props.max_brightness);
 }
 
 static ssize_t backlight_show_actual_brightness(struct class_device *cdev,
@@ -169,10 +151,10 @@ static ssize_t backlight_show_actual_brightness(struct class_device *cdev,
         int rc = -ENXIO;
         struct backlight_device *bd = to_backlight_device(cdev);
 
-        mutex_lock(&bd->props_lock);
-        if (bd->props && bd->props->get_brightness)
-                rc = sprintf(buf, "%d\n", bd->props->get_brightness(bd));
-        mutex_unlock(&bd->props_lock);
+        mutex_lock(&bd->ops_lock);
+        if (bd->ops && bd->ops->get_brightness)
+                rc = sprintf(buf, "%d\n", bd->ops->get_brightness(bd));
+        mutex_unlock(&bd->ops_lock);
 
         return rc;
 }
@@ -211,7 +193,7 @@ static const struct class_device_attribute bl_class_device_attributes[] = {
  *   respective framebuffer device).
  * @devdata: an optional pointer to be stored in the class_device. The
  *   methods may retrieve it by using class_get_devdata(&bd->class_dev).
- * @bp: the backlight properties structure.
+ * @ops: the backlight operations structure.
  *
  * Creates and registers new backlight class_device. Returns either an
  * ERR_PTR() or a pointer to the newly allocated device.
@@ -219,21 +201,20 @@ static const struct class_device_attribute bl_class_device_attributes[] = {
 struct backlight_device *backlight_device_register(const char *name,
         struct device *dev,
         void *devdata,
-        struct backlight_properties *bp)
+        struct backlight_ops *ops)
 {
         int i, rc;
         struct backlight_device *new_bd;
 
         pr_debug("backlight_device_alloc: name=%s\n", name);
 
-        new_bd = kmalloc(sizeof(struct backlight_device), GFP_KERNEL);
+        new_bd = kzalloc(sizeof(struct backlight_device), GFP_KERNEL);
         if (!new_bd)
                 return ERR_PTR(-ENOMEM);
 
         mutex_init(&new_bd->update_lock);
-        mutex_init(&new_bd->props_lock);
-        new_bd->props = bp;
-        memset(&new_bd->class_dev, 0, sizeof(new_bd->class_dev));
+        mutex_init(&new_bd->ops_lock);
+        new_bd->ops = ops;
         new_bd->class_dev.class = &backlight_class;
         new_bd->class_dev.dev = dev;
         strlcpy(new_bd->class_dev.class_id, name, KOBJ_NAME_LEN);
@@ -302,9 +283,9 @@ void backlight_device_unregister(struct backlight_device *bd)
                 class_device_remove_file(&bd->class_dev,
                                          &bl_class_device_attributes[i]);
 
-        mutex_lock(&bd->props_lock);
-        bd->props = NULL;
-        mutex_unlock(&bd->props_lock);
+        mutex_lock(&bd->ops_lock);
+        bd->ops = NULL;
+        mutex_unlock(&bd->ops_lock);
 
         backlight_unregister_fb(bd);
 
diff --git a/drivers/video/backlight/corgi_bl.c b/drivers/video/backlight/corgi_bl.c
index c1eba0e8a1b0..05f36811ac95 100644
--- a/drivers/video/backlight/corgi_bl.c
+++ b/drivers/video/backlight/corgi_bl.c
@@ -34,11 +34,11 @@ static unsigned long corgibl_flags;
 static int corgibl_send_intensity(struct backlight_device *bd)
 {
         void (*corgi_kick_batt)(void);
-        int intensity = bd->props->brightness;
+        int intensity = bd->props.brightness;
 
-        if (bd->props->power != FB_BLANK_UNBLANK)
+        if (bd->props.power != FB_BLANK_UNBLANK)
                 intensity = 0;
-        if (bd->props->fb_blank != FB_BLANK_UNBLANK)
+        if (bd->props.fb_blank != FB_BLANK_UNBLANK)
                 intensity = 0;
         if (corgibl_flags & CORGIBL_SUSPENDED)
                 intensity = 0;
@@ -103,7 +103,7 @@ void corgibl_limit_intensity(int limit)
 EXPORT_SYMBOL(corgibl_limit_intensity);
 
 
-static struct backlight_properties corgibl_data = {
+static struct backlight_ops corgibl_ops = {
         .get_brightness = corgibl_get_intensity,
         .update_status  = corgibl_send_intensity,
 };
@@ -113,19 +113,19 @@ static int corgibl_probe(struct platform_device *pdev)
         struct corgibl_machinfo *machinfo = pdev->dev.platform_data;
 
         bl_machinfo = machinfo;
-        corgibl_data.max_brightness = machinfo->max_intensity;
         if (!machinfo->limit_mask)
                 machinfo->limit_mask = -1;
 
         corgi_backlight_device = backlight_device_register ("corgi-bl",
-                &pdev->dev, NULL, &corgibl_data);
+                &pdev->dev, NULL, &corgibl_ops);
         if (IS_ERR (corgi_backlight_device))
                 return PTR_ERR (corgi_backlight_device);
 
         platform_set_drvdata(pdev, corgi_backlight_device);
 
-        corgibl_data.power = FB_BLANK_UNBLANK;
-        corgibl_data.brightness = machinfo->default_intensity;
+        corgi_backlight_device->props.max_brightness = machinfo->max_intensity;
+        corgi_backlight_device->props.power = FB_BLANK_UNBLANK;
+        corgi_backlight_device->props.brightness = machinfo->default_intensity;
         corgibl_send_intensity(corgi_backlight_device);
 
         printk("Corgi Backlight Driver Initialized.\n");
diff --git a/drivers/video/backlight/hp680_bl.c b/drivers/video/backlight/hp680_bl.c
index e7444c8f289d..0899fccbd570 100644
--- a/drivers/video/backlight/hp680_bl.c
+++ b/drivers/video/backlight/hp680_bl.c
@@ -33,11 +33,11 @@ static void hp680bl_send_intensity(struct backlight_device *bd)
 {
         unsigned long flags;
         u16 v;
-        int intensity = bd->props->brightness;
+        int intensity = bd->props.brightness;
 
-        if (bd->props->power != FB_BLANK_UNBLANK)
+        if (bd->props.power != FB_BLANK_UNBLANK)
                 intensity = 0;
-        if (bd->props->fb_blank != FB_BLANK_UNBLANK)
+        if (bd->props.fb_blank != FB_BLANK_UNBLANK)
                 intensity = 0;
         if (hp680bl_suspended)
                 intensity = 0;
@@ -98,8 +98,7 @@ static int hp680bl_get_intensity(struct backlight_device *bd)
         return current_intensity;
 }
 
-static struct backlight_properties hp680bl_data = {
-        .max_brightness = HP680_MAX_INTENSITY,
+static struct backlight_ops hp680bl_ops = {
         .get_brightness = hp680bl_get_intensity,
         .update_status  = hp680bl_set_intensity,
 };
@@ -109,13 +108,14 @@ static int __init hp680bl_probe(struct platform_device *pdev)
         struct backlight_device *bd;
 
         bd = backlight_device_register ("hp680-bl", &pdev->dev, NULL,
-                    &hp680bl_data);
+                    &hp680bl_ops);
         if (IS_ERR(bd))
                 return PTR_ERR(bd);
 
         platform_set_drvdata(pdev, bd);
 
-        bd->props->brightness = HP680_DEFAULT_INTENSITY;
+        bd->props.max_brightness = HP680_MAX_INTENSITY;
+        bd->props.brightness = HP680_DEFAULT_INTENSITY;
         hp680bl_send_intensity(bd);
 
         return 0;
diff --git a/drivers/video/backlight/lcd.c b/drivers/video/backlight/lcd.c
index 430ba018a896..6ef8f0a7a137 100644
--- a/drivers/video/backlight/lcd.c
+++ b/drivers/video/backlight/lcd.c
@@ -31,11 +31,11 @@ static int fb_notifier_callback(struct notifier_block *self,
                 return 0;
 
         ld = container_of(self, struct lcd_device, fb_notif);
-        mutex_lock(&ld->props_lock);
-        if (ld->props)
-                if (!ld->props->check_fb || ld->props->check_fb(evdata->info))
-                        ld->props->set_power(ld, *(int *)evdata->data);
-        mutex_unlock(&ld->props_lock);
+        mutex_lock(&ld->ops_lock);
+        if (ld->ops)
+                if (!ld->ops->check_fb || ld->ops->check_fb(evdata->info))
+                        ld->ops->set_power(ld, *(int *)evdata->data);
+        mutex_unlock(&ld->ops_lock);
         return 0;
 }
 
@@ -66,12 +66,12 @@ static ssize_t lcd_show_power(struct class_device *cdev, char *buf)
         int rc;
         struct lcd_device *ld = to_lcd_device(cdev);
 
-        mutex_lock(&ld->props_lock);
-        if (ld->props && ld->props->get_power)
-                rc = sprintf(buf, "%d\n", ld->props->get_power(ld));
+        mutex_lock(&ld->ops_lock);
+        if (ld->ops && ld->ops->get_power)
+                rc = sprintf(buf, "%d\n", ld->ops->get_power(ld));
         else
                 rc = -ENXIO;
-        mutex_unlock(&ld->props_lock);
+        mutex_unlock(&ld->ops_lock);
 
         return rc;
 }
@@ -89,13 +89,13 @@ static ssize_t lcd_store_power(struct class_device *cdev, const char *buf, size_
         if (size != count)
                 return -EINVAL;
 
-        mutex_lock(&ld->props_lock);
-        if (ld->props && ld->props->set_power) {
+        mutex_lock(&ld->ops_lock);
+        if (ld->ops && ld->ops->set_power) {
                 pr_debug("lcd: set power to %d\n", power);
-                ld->props->set_power(ld, power);
+                ld->ops->set_power(ld, power);
                 rc = count;
         }
-        mutex_unlock(&ld->props_lock);
+        mutex_unlock(&ld->ops_lock);
 
         return rc;
 }
@@ -105,10 +105,10 @@ static ssize_t lcd_show_contrast(struct class_device *cdev, char *buf)
         int rc = -ENXIO;
         struct lcd_device *ld = to_lcd_device(cdev);
 
-        mutex_lock(&ld->props_lock);
-        if (ld->props && ld->props->get_contrast)
-                rc = sprintf(buf, "%d\n", ld->props->get_contrast(ld));
-        mutex_unlock(&ld->props_lock);
+        mutex_lock(&ld->ops_lock);
+        if (ld->ops && ld->ops->get_contrast)
+                rc = sprintf(buf, "%d\n", ld->ops->get_contrast(ld));
+        mutex_unlock(&ld->ops_lock);
 
         return rc;
 }
@@ -126,28 +126,22 @@ static ssize_t lcd_store_contrast(struct class_device *cdev, const char *buf, si
         if (size != count)
                 return -EINVAL;
 
-        mutex_lock(&ld->props_lock);
-        if (ld->props && ld->props->set_contrast) {
+        mutex_lock(&ld->ops_lock);
+        if (ld->ops && ld->ops->set_contrast) {
                 pr_debug("lcd: set contrast to %d\n", contrast);
-                ld->props->set_contrast(ld, contrast);
+                ld->ops->set_contrast(ld, contrast);
                 rc = count;
         }
-        mutex_unlock(&ld->props_lock);
+        mutex_unlock(&ld->ops_lock);
 
         return rc;
 }
 
 static ssize_t lcd_show_max_contrast(struct class_device *cdev, char *buf)
 {
-        int rc = -ENXIO;
         struct lcd_device *ld = to_lcd_device(cdev);
 
-        mutex_lock(&ld->props_lock);
-        if (ld->props)
-                rc = sprintf(buf, "%d\n", ld->props->max_contrast);
-        mutex_unlock(&ld->props_lock);
-
-        return rc;
+        return sprintf(buf, "%d\n", ld->props.max_contrast);
 }
 
 static void lcd_class_release(struct class_device *dev)
@@ -180,27 +174,26 @@ static const struct class_device_attribute lcd_class_device_attributes[] = {
  *   respective framebuffer device).
  * @devdata: an optional pointer to be stored in the class_device. The
  *   methods may retrieve it by using class_get_devdata(ld->class_dev).
- * @lp: the lcd properties structure.
+ * @ops: the lcd operations structure.
  *
  * Creates and registers a new lcd class_device. Returns either an ERR_PTR()
  * or a pointer to the newly allocated device.
  */
 struct lcd_device *lcd_device_register(const char *name, void *devdata,
-                                       struct lcd_properties *lp)
+                                       struct lcd_ops *ops)
 {
         int i, rc;
         struct lcd_device *new_ld;
 
         pr_debug("lcd_device_register: name=%s\n", name);
 
-        new_ld = kmalloc(sizeof(struct lcd_device), GFP_KERNEL);
+        new_ld = kzalloc(sizeof(struct lcd_device), GFP_KERNEL);
         if (!new_ld)
                 return ERR_PTR(-ENOMEM);
 
-        mutex_init(&new_ld->props_lock);
+        mutex_init(&new_ld->ops_lock);
         mutex_init(&new_ld->update_lock);
-        new_ld->props = lp;
-        memset(&new_ld->class_dev, 0, sizeof(new_ld->class_dev));
+        new_ld->ops = ops;
         new_ld->class_dev.class = &lcd_class;
         strlcpy(new_ld->class_dev.class_id, name, KOBJ_NAME_LEN);
         class_set_devdata(&new_ld->class_dev, devdata);
@@ -253,9 +246,9 @@ void lcd_device_unregister(struct lcd_device *ld)
                 class_device_remove_file(&ld->class_dev,
                                          &lcd_class_device_attributes[i]);
 
-        mutex_lock(&ld->props_lock);
-        ld->props = NULL;
-        mutex_unlock(&ld->props_lock);
+        mutex_lock(&ld->ops_lock);
+        ld->ops = NULL;
+        mutex_unlock(&ld->ops_lock);
         lcd_unregister_fb(ld);
         class_device_unregister(&ld->class_dev);
 }
diff --git a/drivers/video/backlight/locomolcd.c b/drivers/video/backlight/locomolcd.c
index 3c5abbf0d042..d1312477813e 100644
--- a/drivers/video/backlight/locomolcd.c
+++ b/drivers/video/backlight/locomolcd.c
@@ -112,11 +112,11 @@ static int current_intensity;
 
 static int locomolcd_set_intensity(struct backlight_device *bd)
 {
-        int intensity = bd->props->brightness;
+        int intensity = bd->props.brightness;
 
-        if (bd->props->power != FB_BLANK_UNBLANK)
+        if (bd->props.power != FB_BLANK_UNBLANK)
                 intensity = 0;
-        if (bd->props->fb_blank != FB_BLANK_UNBLANK)
+        if (bd->props.fb_blank != FB_BLANK_UNBLANK)
                 intensity = 0;
         if (locomolcd_flags & LOCOMOLCD_SUSPENDED)
                 intensity = 0;
@@ -141,10 +141,9 @@ static int locomolcd_get_intensity(struct backlight_device *bd)
         return current_intensity;
 }
 
-static struct backlight_properties locomobl_data = {
+static struct backlight_ops locomobl_data = {
         .get_brightness = locomolcd_get_intensity,
         .update_status  = locomolcd_set_intensity,
-        .max_brightness = 4,
 };
 
 #ifdef CONFIG_PM
@@ -189,7 +188,8 @@ static int locomolcd_probe(struct locomo_dev *ldev)
                 return PTR_ERR (locomolcd_bl_device);
 
         /* Set up frontlight so that screen is readable */
-        locomobl_data.brightness = 2;
+        locomolcd_bl_device->props.max_brightness = 4,
+        locomolcd_bl_device->props.brightness = 2;
         locomolcd_set_intensity(locomolcd_bl_device);
 
         return 0;
diff --git a/drivers/video/backlight/progear_bl.c b/drivers/video/backlight/progear_bl.c
index 42d6acd96c1a..702269357861 100644
--- a/drivers/video/backlight/progear_bl.c
+++ b/drivers/video/backlight/progear_bl.c
@@ -35,11 +35,11 @@ static struct pci_dev *sb_dev = NULL;
 
 static int progearbl_set_intensity(struct backlight_device *bd)
 {
-        int intensity = bd->props->brightness;
+        int intensity = bd->props.brightness;
 
-        if (bd->props->power != FB_BLANK_UNBLANK)
+        if (bd->props.power != FB_BLANK_UNBLANK)
                 intensity = 0;
-        if (bd->props->fb_blank != FB_BLANK_UNBLANK)
+        if (bd->props.fb_blank != FB_BLANK_UNBLANK)
                 intensity = 0;
 
         pci_write_config_byte(pmu_dev, PMU_LPCR, intensity + HW_LEVEL_MIN);
@@ -55,7 +55,7 @@ static int progearbl_get_intensity(struct backlight_device *bd)
         return intensity - HW_LEVEL_MIN;
 }
 
-static struct backlight_properties progearbl_data = {
+static struct backlight_ops progearbl_ops = {
         .get_brightness = progearbl_get_intensity,
         .update_status = progearbl_set_intensity,
 };
@@ -84,15 +84,15 @@ static int progearbl_probe(struct platform_device *pdev)
 
         progear_backlight_device = backlight_device_register("progear-bl",
                                                              &pdev->dev, NULL,
-                                                             &progearbl_data);
+                                                             &progearbl_ops);
         if (IS_ERR(progear_backlight_device))
                 return PTR_ERR(progear_backlight_device);
 
         platform_set_drvdata(pdev, progear_backlight_device);
 
-        progearbl_data.power = FB_BLANK_UNBLANK;
-        progearbl_data.brightness = HW_LEVEL_MAX - HW_LEVEL_MIN;
-        progearbl_data.max_brightness = HW_LEVEL_MAX - HW_LEVEL_MIN;
+        progear_backlight_device->props.power = FB_BLANK_UNBLANK;
+        progear_backlight_device->props.brightness = HW_LEVEL_MAX - HW_LEVEL_MIN;
+        progear_backlight_device->props.max_brightness = HW_LEVEL_MAX - HW_LEVEL_MIN;
         progearbl_set_intensity(progear_backlight_device);
 
         return 0;