diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/video/backlight/ep93xx_bl.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/video/backlight/ep93xx_bl.c | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/ANDROID_3.4.5/drivers/video/backlight/ep93xx_bl.c b/ANDROID_3.4.5/drivers/video/backlight/ep93xx_bl.c deleted file mode 100644 index 08214e1f..00000000 --- a/ANDROID_3.4.5/drivers/video/backlight/ep93xx_bl.c +++ /dev/null @@ -1,154 +0,0 @@ -/* - * Driver for the Cirrus EP93xx lcd backlight - * - * Copyright (c) 2010 H Hartley Sweeten <hsweeten@visionengravers.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This driver controls the pulse width modulated brightness control output, - * BRIGHT, on the Cirrus EP9307, EP9312, and EP9315 processors. - */ - -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/io.h> -#include <linux/fb.h> -#include <linux/backlight.h> - -#define EP93XX_MAX_COUNT 255 -#define EP93XX_MAX_BRIGHT 255 -#define EP93XX_DEF_BRIGHT 128 - -struct ep93xxbl { - void __iomem *mmio; - int brightness; -}; - -static int ep93xxbl_set(struct backlight_device *bl, int brightness) -{ - struct ep93xxbl *ep93xxbl = bl_get_data(bl); - - writel((brightness << 8) | EP93XX_MAX_COUNT, ep93xxbl->mmio); - - ep93xxbl->brightness = brightness; - - return 0; -} - -static int ep93xxbl_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; - - return ep93xxbl_set(bl, brightness); -} - -static int ep93xxbl_get_brightness(struct backlight_device *bl) -{ - struct ep93xxbl *ep93xxbl = bl_get_data(bl); - - return ep93xxbl->brightness; -} - -static const struct backlight_ops ep93xxbl_ops = { - .update_status = ep93xxbl_update_status, - .get_brightness = ep93xxbl_get_brightness, -}; - -static int __init ep93xxbl_probe(struct platform_device *dev) -{ - struct ep93xxbl *ep93xxbl; - struct backlight_device *bl; - struct backlight_properties props; - struct resource *res; - - ep93xxbl = devm_kzalloc(&dev->dev, sizeof(*ep93xxbl), GFP_KERNEL); - if (!ep93xxbl) - return -ENOMEM; - - res = platform_get_resource(dev, IORESOURCE_MEM, 0); - if (!res) - return -ENXIO; - - /* - * FIXME - We don't do a request_mem_region here because we are - * sharing the register space with the framebuffer driver (see - * drivers/video/ep93xx-fb.c) and doing so will cause the second - * loaded driver to return -EBUSY. - * - * NOTE: No locking is required; the framebuffer does not touch - * this register. - */ - ep93xxbl->mmio = devm_ioremap(&dev->dev, res->start, - resource_size(res)); - if (!ep93xxbl->mmio) - return -ENXIO; - - memset(&props, 0, sizeof(struct backlight_properties)); - props.type = BACKLIGHT_RAW; - props.max_brightness = EP93XX_MAX_BRIGHT; - bl = backlight_device_register(dev->name, &dev->dev, ep93xxbl, - &ep93xxbl_ops, &props); - if (IS_ERR(bl)) - return PTR_ERR(bl); - - bl->props.brightness = EP93XX_DEF_BRIGHT; - - platform_set_drvdata(dev, bl); - - ep93xxbl_update_status(bl); - - return 0; -} - -static int ep93xxbl_remove(struct platform_device *dev) -{ - struct backlight_device *bl = platform_get_drvdata(dev); - - backlight_device_unregister(bl); - platform_set_drvdata(dev, NULL); - return 0; -} - -#ifdef CONFIG_PM -static int ep93xxbl_suspend(struct platform_device *dev, pm_message_t state) -{ - struct backlight_device *bl = platform_get_drvdata(dev); - - return ep93xxbl_set(bl, 0); -} - -static int ep93xxbl_resume(struct platform_device *dev) -{ - struct backlight_device *bl = platform_get_drvdata(dev); - - backlight_update_status(bl); - return 0; -} -#else -#define ep93xxbl_suspend NULL -#define ep93xxbl_resume NULL -#endif - -static struct platform_driver ep93xxbl_driver = { - .driver = { - .name = "ep93xx-bl", - .owner = THIS_MODULE, - }, - .probe = ep93xxbl_probe, - .remove = __devexit_p(ep93xxbl_remove), - .suspend = ep93xxbl_suspend, - .resume = ep93xxbl_resume, -}; - -module_platform_driver(ep93xxbl_driver); - -MODULE_DESCRIPTION("EP93xx Backlight Driver"); -MODULE_AUTHOR("H Hartley Sweeten <hsweeten@visionengravers.com>"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:ep93xx-bl"); |