[ARM] pxa: make mainstone use the generic PWM backlight driver (402e4909) · Commits · e / devices / android_kernel_teracube_2e

arch/arm/mach-pxa/Kconfig

+1 −0

Original line number	Diff line number	Diff line
		@@ -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"

arch/arm/mach-pxa/mainstone.c

+17 −46

Original line number	Diff line number	Diff line
		@@ -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)