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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2008-04-13 21:47:01 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-07-03 13:25:03 +0100
commit402e490997ddaae310a080534a61d7ec24df8124 (patch)
treea40d61d6ef76886e6574e53d7342af62e2a703cf
parent5cca91479b8ac6a60b61bc56e72389c681387211 (diff)
[ARM] pxa: make mainstone use the generic PWM backlight driver
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-rw-r--r--arch/arm/mach-pxa/Kconfig1
-rw-r--r--arch/arm/mach-pxa/mainstone.c63
2 files changed, 18 insertions, 46 deletions
diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig
index b7a3281c420..2d711308076 100644
--- a/arch/arm/mach-pxa/Kconfig
+++ b/arch/arm/mach-pxa/Kconfig
@@ -41,6 +41,7 @@ config MACH_LOGICPD_PXA270
config MACH_MAINSTONE
bool "Intel HCDDBBVA0 Development Platform"
select PXA27x
+ select HAVE_PWM
config ARCH_PXA_IDP
bool "Accelent Xscale IDP"
diff --git a/arch/arm/mach-pxa/mainstone.c b/arch/arm/mach-pxa/mainstone.c
index 7399fb34da4..266594426e8 100644
--- a/arch/arm/mach-pxa/mainstone.c
+++ b/arch/arm/mach-pxa/mainstone.c
@@ -23,9 +23,9 @@
#include <linux/ioport.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
-#include <linux/backlight.h>
#include <linux/input.h>
#include <linux/gpio_keys.h>
+#include <linux/pwm_backlight.h>
#include <asm/types.h>
#include <asm/setup.h>
@@ -349,56 +349,27 @@ static struct platform_device mst_flash_device[2] = {
},
};
-#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
-static int mainstone_backlight_update_status(struct backlight_device *bl)
-{
- int brightness = bl->props.brightness;
-
- if (bl->props.power != FB_BLANK_UNBLANK ||
- bl->props.fb_blank != FB_BLANK_UNBLANK)
- brightness = 0;
-
- if (brightness != 0)
- pxa_set_cken(CKEN_PWM0, 1);
-
- PWM_CTRL0 = 0;
- PWM_PWDUTY0 = brightness;
- PWM_PERVAL0 = bl->props.max_brightness;
-
- if (brightness == 0)
- pxa_set_cken(CKEN_PWM0, 0);
- return 0; /* pointless return value */
-}
-
-static int mainstone_backlight_get_brightness(struct backlight_device *bl)
-{
- return PWM_PWDUTY0;
-}
+#if defined(CONFIG_FB_PXA) || defined(CONFIG_FB_PXA_MODULE)
+static struct platform_pwm_backlight_data mainstone_backlight_data = {
+ .pwm_id = 0,
+ .max_brightness = 1023,
+ .dft_brightness = 1023,
+ .pwm_period_ns = 78770,
+};
-static /*const*/ struct backlight_ops mainstone_backlight_ops = {
- .update_status = mainstone_backlight_update_status,
- .get_brightness = mainstone_backlight_get_brightness,
+static struct platform_device mainstone_backlight_device = {
+ .name = "pwm-backlight",
+ .dev = {
+ .parent = &pxa27x_device_pwm0.dev,
+ .platform_data = &mainstone_backlight_data,
+ },
};
static void __init mainstone_backlight_register(void)
{
- struct backlight_device *bl;
-
- bl = backlight_device_register("mainstone-bl", &pxa_device_fb.dev,
- NULL, &mainstone_backlight_ops);
- if (IS_ERR(bl)) {
- printk(KERN_ERR "mainstone: unable to register backlight: %ld\n",
- PTR_ERR(bl));
- return;
- }
-
- /*
- * broken design - register-then-setup interfaces are
- * utterly broken by definition.
- */
- bl->props.max_brightness = 1023;
- bl->props.brightness = 1023;
- backlight_update_status(bl);
+ int ret = platform_device_register(&mainstone_backlight_device);
+ if (ret)
+ printk(KERN_ERR "mainstone: failed to register backlight device: %d\n", ret);
}
#else
#define mainstone_backlight_register() do { } while (0)