[ARM] pxa/cm-x300: add PWM backlight support
Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig
index 20e645a..d89c6ad 100644
--- a/arch/arm/mach-pxa/Kconfig
+++ b/arch/arm/mach-pxa/Kconfig
@@ -226,6 +226,7 @@
select PXA3xx
select CPU_PXA300
select CPU_PXA310
+ select HAVE_PWM
config MACH_COLIBRI320
bool "Toradex Colibri PXA320"
diff --git a/arch/arm/mach-pxa/cm-x300.c b/arch/arm/mach-pxa/cm-x300.c
index d564d8e..d37cfa1 100644
--- a/arch/arm/mach-pxa/cm-x300.c
+++ b/arch/arm/mach-pxa/cm-x300.c
@@ -24,6 +24,7 @@
#include <linux/dm9000.h>
#include <linux/leds.h>
#include <linux/rtc-v3020.h>
+#include <linux/pwm_backlight.h>
#include <linux/i2c.h>
#include <linux/i2c/pca953x.h>
@@ -50,6 +51,7 @@
#include <asm/mach/map.h>
#include "generic.h"
+#include "devices.h"
#define CM_X300_ETH_PHYS 0x08000010
@@ -160,6 +162,9 @@
/* Standard I2C */
GPIO21_I2C_SCL,
GPIO22_I2C_SDA,
+
+ /* PWM Backlight */
+ GPIO19_PWM2_OUT,
};
static mfp_cfg_t cm_x3xx_rev_lt130_mfp_cfg[] __initdata = {
@@ -290,6 +295,30 @@
static inline void cm_x300_init_lcd(void) {}
#endif
+#if defined(CONFIG_BACKLIGHT_PWM) || defined(CONFIG_BACKLIGHT_PWM_MODULE)
+static struct platform_pwm_backlight_data cm_x300_backlight_data = {
+ .pwm_id = 2,
+ .max_brightness = 100,
+ .dft_brightness = 100,
+ .pwm_period_ns = 10000,
+};
+
+static struct platform_device cm_x300_backlight_device = {
+ .name = "pwm-backlight",
+ .dev = {
+ .parent = &pxa27x_device_pwm0.dev,
+ .platform_data = &cm_x300_backlight_data,
+ },
+};
+
+static void cm_x300_init_bl(void)
+{
+ platform_device_register(&cm_x300_backlight_device);
+}
+#else
+static inline void cm_x300_init_bl(void) {}
+#endif
+
#if defined(CONFIG_SPI_GPIO) || defined(CONFIG_SPI_GPIO_MODULE)
#define GPIO_LCD_BASE (144)
#define GPIO_LCD_DIN (GPIO_LCD_BASE + 8) /* aux_gpio3_0 */
@@ -654,6 +683,7 @@
cm_x300_init_rtc();
cm_x300_init_ac97();
cm_x300_init_wi2wi();
+ cm_x300_init_bl();
}
static void __init cm_x300_fixup(struct machine_desc *mdesc, struct tag *tags,
diff --git a/arch/arm/mach-pxa/devices.c b/arch/arm/mach-pxa/devices.c
index d4cc41d..3395463 100644
--- a/arch/arm/mach-pxa/devices.c
+++ b/arch/arm/mach-pxa/devices.c
@@ -4,6 +4,7 @@
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
+#include <mach/hardware.h>
#include <mach/udc.h>
#include <mach/pxafb.h>
#include <mach/mmc.h>