linux-kernel - [PATCH 1/2] lp855x-bl: remove unnecessary platform data

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Message-ID: <B567DBAB974C0544994013492B949F8E3813076551@EXMAIL03.scwf.nsc.com>
Date:	Mon, 20 Feb 2012 02:12:46 -0800
From:	"Kim, Milo" <Milo.Kim@...com>
To:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
cc:	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Axel Lin" <axel.lin@...il.com>,
	"Richard Purdie" <rpurdie@...ys.net>
Subject: [PATCH 1/2] lp855x-bl: remove unnecessary platform data

All lp855x devices have 8-bits brightness contorl register.
The value of max_brightness is set to 255.
So the max_brightness in the platform data is unnecessary.

Signed-off-by: Milo(Woogyom) Kim <milo.kim@...com>
Cc: Axel Lin <axel.lin@...il.com>
---
 Documentation/backlight/lp855x-driver.txt |    3 ---
 drivers/video/backlight/lp855x_bl.c       |   11 +++++++----
 include/linux/lp855x.h                    |    2 --
 3 files changed, 7 insertions(+), 9 deletions(-)

diff --git a/Documentation/backlight/lp855x-driver.txt b/Documentation/backlight/lp855x-driver.txt
index 321351e..f5e4caa 100755
--- a/Documentation/backlight/lp855x-driver.txt
+++ b/Documentation/backlight/lp855x-driver.txt
@@ -35,7 +35,6 @@ For supporting platform specific data, the lp855x platform data can be used.
 * mode : Brightness control mode. PWM or register based.
 * device_control : Value of DEVICE CONTROL register.
 * initial_brightness : Initial value of backlight brightness.
-* max_brightness : Maximum value of backlight brightness.
 * pwm_data : Platform specific pwm generation functions.
 	     Only valid when brightness is pwm input mode.
 	     Functions should be implemented by PWM driver.
@@ -61,7 +60,6 @@ static struct lp855x_platform_data lp8552_pdata = {
 	.mode = REGISTER_BASED,
 	.device_control = I2C_CONFIG(LP8552),
 	.initial_brightness = INITIAL_BRT,
-	.max_brightness = MAX_BRT,
 	.load_new_rom_data = 1,
 	.size_program = ARRAY_SIZE(lp8552_eeprom_arr),
 	.rom_data = lp8552_eeprom_arr,
@@ -73,7 +71,6 @@ static struct lp855x_platform_data lp8556_pdata = {
 	.mode = PWM_BASED,
 	.device_control = PWM_CONFIG(LP8556),
 	.initial_brightness = INITIAL_BRT,
-	.max_brightness = MAX_BRT,
 	.pwm_data = {
 		     .pwm_set_intensity = platform_pwm_set_intensity,
 		     .pwm_get_intensity = platform_pwm_get_intensity,
diff --git a/drivers/video/backlight/lp855x_bl.c b/drivers/video/backlight/lp855x_bl.c
index 8d2d10c..640624b 100755
--- a/drivers/video/backlight/lp855x_bl.c
+++ b/drivers/video/backlight/lp855x_bl.c
@@ -22,8 +22,9 @@
 #define BRIGHTNESS_CTRL		(0x00)
 #define DEVICE_CTRL		(0x01)
 
-#define BUF_SIZE		(20)
+#define BUF_SIZE		20
 #define DEFAULT_BL_NAME		"lcd-backlight"
+#define MAX_BRIGHTNESS		255
 
 struct lp855x {
 	const char *chipid;
@@ -171,10 +172,12 @@ static int lp855x_backlight_register(struct lp855x *lp)
 	char *name = pdata->name ? : DEFAULT_BL_NAME;
 
 	props.type = BACKLIGHT_PLATFORM;
+	props.max_brightness = MAX_BRIGHTNESS;
+
+	if (pdata->initial_brightness > props.max_brightness)
+		pdata->initial_brightness = props.max_brightness;
+
 	props.brightness = pdata->initial_brightness;
-	props.max_brightness =
-		(pdata->max_brightness < pdata->initial_brightness) ?
-		255 : pdata->max_brightness;
 
 	bl = backlight_device_register(name, lp->dev, lp,
 				       &lp855x_bl_ops, &props);
diff --git a/include/linux/lp855x.h b/include/linux/lp855x.h
index 4b124c1..781a490 100755
--- a/include/linux/lp855x.h
+++ b/include/linux/lp855x.h
@@ -109,7 +109,6 @@ struct lp855x_rom_data {
  * @mode : brightness control by pwm or lp855x register
  * @device_control : value of DEVICE CONTROL register
  * @initial_brightness : initial value of backlight brightness
- * @max_brightness : maximum value of backlight brightness
  * @pwm_data : platform specific pwm generation functions.
 		Only valid when mode is PWM_BASED.
  * @load_new_rom_data :
@@ -123,7 +122,6 @@ struct lp855x_platform_data {
 	enum lp855x_brightness_ctrl_mode mode;
 	u8 device_control;
 	int initial_brightness;
-	int max_brightness;
 	struct lp855x_pwm_data pwm_data;
 	u8 load_new_rom_data;
 	int size_program;
-- 
1.7.4.1


Best Regards,
Milo (Woogyom) Kim
Texas Instruments Incorporated



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