[ARM] pxa: make zylonite use the generic PWM backlight driver

Patch mostly by Eric Miao, minor edits by rmk.

Signed-off-by: eric miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 17 insertions, 9 deletions

diff --git a/arch/arm/mach-pxa/zylonite.c b/arch/arm/mach-pxa/zylonite.c
index 4a0028087ea6..b13bb9385138 100644
--- a/arch/arm/mach-pxa/zylonite.c
+++ b/arch/arm/mach-pxa/zylonite.c
@@ -18,6 +18,7 @@
 #include <linux/interrupt.h>
 #include <linux/init.h>
 #include <linux/platform_device.h>
+#include <linux/pwm_backlight.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -28,12 +29,12 @@
 #include <asm/arch/mmc.h>
 #include <asm/arch/pxa27x_keypad.h>
 
+#include "devices.h"
 #include "generic.h"
 
 #define MAX_SLOTS       3
 struct platform_mmc_slot zylonite_mmc_slot[MAX_SLOTS];
 
-int gpio_backlight;
 int gpio_eth_irq;
 
 int wm9713_irq;
@@ -62,10 +63,20 @@ static struct platform_device smc91x_device = {
 };
 
 #if defined(CONFIG_FB_PXA) || defined(CONFIG_FB_PXA_MODULE)
-static void zylonite_backlight_power(int on)
-{
-        gpio_set_value(gpio_backlight, on);
-}
+static struct platform_pwm_backlight_data zylonite_backlight_data = {
+        .pwm_id         = 3,
+        .max_brightness = 100,
+        .dft_brightness = 100,
+        .pwm_period_ns  = 10000,
+};
+
+static struct platform_device zylonite_backlight_device = {
+        .name           = "pwm-backlight",
+        .dev            = {
+                .parent = &pxa27x_device_pwm1.dev,
+                .platform_data  = &zylonite_backlight_data,
+        },
+};
 
 static struct pxafb_mode_info toshiba_ltm035a776c_mode = {
         .pixclock               = 110000,
@@ -98,7 +109,6 @@ static struct pxafb_mode_info toshiba_ltm04c380k_mode = {
 static struct pxafb_mach_info zylonite_toshiba_lcd_info = {
         .num_modes              = 1,
         .lcd_conn               = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
-        .pxafb_backlight_power  = zylonite_backlight_power,
 };
 
 static struct pxafb_mode_info sharp_ls037_modes[] = {
@@ -134,13 +144,11 @@ static struct pxafb_mach_info zylonite_sharp_lcd_info = {
         .modes                  = sharp_ls037_modes,
         .num_modes              = 2,
         .lcd_conn               = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
-        .pxafb_backlight_power  = zylonite_backlight_power,
 };
 
 static void __init zylonite_init_lcd(void)
 {
-        /* backlight GPIO: output, default on */
-        gpio_direction_output(gpio_backlight, 1);
+        platform_device_register(&zylonite_backlight_device);
 
         if (lcd_id & 0x20) {
                 set_pxa_fb_info(&zylonite_sharp_lcd_info);