[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>
diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig
index 9c01505..b7a3281 100644
--- a/arch/arm/mach-pxa/Kconfig
+++ b/arch/arm/mach-pxa/Kconfig
@@ -116,6 +116,7 @@
config MACH_ZYLONITE
bool "PXA3xx Development Platform"
select PXA3xx
+ select HAVE_PWM
config MACH_LITTLETON
bool "PXA3xx Form Factor Platform (aka Littleton)"
@@ -276,6 +277,7 @@
config PXA_PWM
tristate
+ default BACKLIGHT_PWM
help
Enable support for PXA2xx/PXA3xx PWM controllers
endif
diff --git a/arch/arm/mach-pxa/zylonite.c b/arch/arm/mach-pxa/zylonite.c
index 4a00280..b13bb93 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 @@
};
#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_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 @@
.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);
diff --git a/arch/arm/mach-pxa/zylonite_pxa300.c b/arch/arm/mach-pxa/zylonite_pxa300.c
index 324fb9d..6f7ae97 100644
--- a/arch/arm/mach-pxa/zylonite_pxa300.c
+++ b/arch/arm/mach-pxa/zylonite_pxa300.c
@@ -50,6 +50,7 @@
GPIO75_LCD_BIAS,
GPIO76_LCD_VSYNC,
GPIO127_LCD_CS_N,
+ GPIO20_PWM3_OUT, /* backlight */
/* BTUART */
GPIO111_UART2_RTS,
@@ -200,9 +201,6 @@
/* detect LCD panel */
zylonite_detect_lcd_panel();
- /* GPIO pin assignment */
- gpio_backlight = mfp_to_gpio(MFP_PIN_GPIO20);
-
/* MMC card detect & write protect for controller 0 */
zylonite_mmc_slot[0].gpio_cd = EXT_GPIO(0);
zylonite_mmc_slot[0].gpio_wp = EXT_GPIO(2);
diff --git a/arch/arm/mach-pxa/zylonite_pxa320.c b/arch/arm/mach-pxa/zylonite_pxa320.c
index 193d079..2b4fc34 100644
--- a/arch/arm/mach-pxa/zylonite_pxa320.c
+++ b/arch/arm/mach-pxa/zylonite_pxa320.c
@@ -49,6 +49,7 @@
GPIO15_2_LCD_LCLK,
GPIO16_2_LCD_PCLK,
GPIO17_2_LCD_BIAS,
+ GPIO14_PWM3_OUT, /* backlight */
/* FFUART */
GPIO41_UART1_RXD | MFP_LPM_EDGE_FALL,
@@ -187,7 +188,6 @@
zylonite_detect_lcd_panel();
/* GPIO pin assignment */
- gpio_backlight = mfp_to_gpio(MFP_PIN_GPIO14);
gpio_eth_irq = mfp_to_gpio(MFP_PIN_GPIO9);
/* MMC card detect & write protect for controller 0 */