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

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2008-04-13 21:47:01 +01:00 committed by Russell King
parent 5cca91479b
commit 402e490997
2 changed files with 18 additions and 46 deletions
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1
arch/arm/mach-pxa/Kconfig
View File

@ -41,6 +41,7 @@ config MACH_LOGICPD_PXA270
config MACH_MAINSTONE config MACH_MAINSTONE
bool "Intel HCDDBBVA0 Development Platform" bool "Intel HCDDBBVA0 Development Platform"
select PXA27x select PXA27x
select HAVE_PWM
config ARCH_PXA_IDP config ARCH_PXA_IDP
bool "Accelent Xscale IDP" bool "Accelent Xscale IDP"

63
arch/arm/mach-pxa/mainstone.c
View File

@ -23,9 +23,9 @@
#include <linux/ioport.h> #include <linux/ioport.h>
#include <linux/mtd/mtd.h> #include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h> #include <linux/mtd/partitions.h>
#include <linux/backlight.h>
#include <linux/input.h> #include <linux/input.h>
#include <linux/gpio_keys.h> #include <linux/gpio_keys.h>
#include <linux/pwm_backlight.h>
#include <asm/types.h> #include <asm/types.h>
#include <asm/setup.h> #include <asm/setup.h>
@ -349,56 +349,27 @@ static struct platform_device mst_flash_device[2] = {
}, },
}; };
#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE #if defined(CONFIG_FB_PXA) || defined(CONFIG_FB_PXA_MODULE)
static int mainstone_backlight_update_status(struct backlight_device *bl) static struct platform_pwm_backlight_data mainstone_backlight_data = {
{ .pwm_id = 0,
int brightness = bl->props.brightness; .max_brightness = 1023,
.dft_brightness = 1023,
.pwm_period_ns = 78770,
};
if (bl->props.power != FB_BLANK_UNBLANK || static struct platform_device mainstone_backlight_device = {
bl->props.fb_blank != FB_BLANK_UNBLANK) .name = "pwm-backlight",
brightness = 0; .dev = {
.parent = &pxa27x_device_pwm0.dev,
if (brightness != 0) .platform_data = &mainstone_backlight_data,
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;
}
static /*const*/ struct backlight_ops mainstone_backlight_ops = {
.update_status = mainstone_backlight_update_status,
.get_brightness = mainstone_backlight_get_brightness,
}; };
static void __init mainstone_backlight_register(void) static void __init mainstone_backlight_register(void)
{ {
struct backlight_device *bl; int ret = platform_device_register(&mainstone_backlight_device);
if (ret)
bl = backlight_device_register("mainstone-bl", &pxa_device_fb.dev, printk(KERN_ERR "mainstone: failed to register backlight device: %d\n", ret);
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);
} }
#else #else
#define mainstone_backlight_register() do { } while (0) #define mainstone_backlight_register() do { } while (0)