diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/video/backlight/pcf50633-backlight.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/video/backlight/pcf50633-backlight.c | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/ANDROID_3.4.5/drivers/video/backlight/pcf50633-backlight.c b/ANDROID_3.4.5/drivers/video/backlight/pcf50633-backlight.c deleted file mode 100644 index c65853cb..00000000 --- a/ANDROID_3.4.5/drivers/video/backlight/pcf50633-backlight.c +++ /dev/null @@ -1,171 +0,0 @@ -/* - * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de> - * PCF50633 backlight device driver - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 675 Mass Ave, Cambridge, MA 02139, USA. - * - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/platform_device.h> - -#include <linux/backlight.h> -#include <linux/fb.h> - -#include <linux/mfd/pcf50633/core.h> -#include <linux/mfd/pcf50633/backlight.h> - -struct pcf50633_bl { - struct pcf50633 *pcf; - struct backlight_device *bl; - - unsigned int brightness; - unsigned int brightness_limit; -}; - -/* - * pcf50633_bl_set_brightness_limit - * - * Update the brightness limit for the pc50633 backlight. The actual brightness - * will not go above the limit. This is useful to limit power drain for example - * on low battery. - * - * @dev: Pointer to a pcf50633 device - * @limit: The brightness limit. Valid values are 0-63 - */ -int pcf50633_bl_set_brightness_limit(struct pcf50633 *pcf, unsigned int limit) -{ - struct pcf50633_bl *pcf_bl = platform_get_drvdata(pcf->bl_pdev); - - if (!pcf_bl) - return -ENODEV; - - pcf_bl->brightness_limit = limit & 0x3f; - backlight_update_status(pcf_bl->bl); - - return 0; -} - -static int pcf50633_bl_update_status(struct backlight_device *bl) -{ - struct pcf50633_bl *pcf_bl = bl_get_data(bl); - unsigned int new_brightness; - - - if (bl->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK) || - bl->props.power != FB_BLANK_UNBLANK) - new_brightness = 0; - else if (bl->props.brightness < pcf_bl->brightness_limit) - new_brightness = bl->props.brightness; - else - new_brightness = pcf_bl->brightness_limit; - - - if (pcf_bl->brightness == new_brightness) - return 0; - - if (new_brightness) { - pcf50633_reg_write(pcf_bl->pcf, PCF50633_REG_LEDOUT, - new_brightness); - if (!pcf_bl->brightness) - pcf50633_reg_write(pcf_bl->pcf, PCF50633_REG_LEDENA, 1); - } else { - pcf50633_reg_write(pcf_bl->pcf, PCF50633_REG_LEDENA, 0); - } - - pcf_bl->brightness = new_brightness; - - return 0; -} - -static int pcf50633_bl_get_brightness(struct backlight_device *bl) -{ - struct pcf50633_bl *pcf_bl = bl_get_data(bl); - return pcf_bl->brightness; -} - -static const struct backlight_ops pcf50633_bl_ops = { - .get_brightness = pcf50633_bl_get_brightness, - .update_status = pcf50633_bl_update_status, - .options = BL_CORE_SUSPENDRESUME, -}; - -static int __devinit pcf50633_bl_probe(struct platform_device *pdev) -{ - struct pcf50633_bl *pcf_bl; - struct device *parent = pdev->dev.parent; - struct pcf50633_platform_data *pcf50633_data = parent->platform_data; - struct pcf50633_bl_platform_data *pdata = pcf50633_data->backlight_data; - struct backlight_properties bl_props; - - pcf_bl = devm_kzalloc(&pdev->dev, sizeof(*pcf_bl), GFP_KERNEL); - if (!pcf_bl) - return -ENOMEM; - - bl_props.type = BACKLIGHT_RAW; - bl_props.max_brightness = 0x3f; - bl_props.power = FB_BLANK_UNBLANK; - - if (pdata) { - bl_props.brightness = pdata->default_brightness; - pcf_bl->brightness_limit = pdata->default_brightness_limit; - } else { - bl_props.brightness = 0x3f; - pcf_bl->brightness_limit = 0x3f; - } - - pcf_bl->pcf = dev_to_pcf50633(pdev->dev.parent); - - pcf_bl->bl = backlight_device_register(pdev->name, &pdev->dev, pcf_bl, - &pcf50633_bl_ops, &bl_props); - - if (IS_ERR(pcf_bl->bl)) - return PTR_ERR(pcf_bl->bl); - - platform_set_drvdata(pdev, pcf_bl); - - pcf50633_reg_write(pcf_bl->pcf, PCF50633_REG_LEDDIM, pdata->ramp_time); - - /* Should be different from bl_props.brightness, so we do not exit - * update_status early the first time it's called */ - pcf_bl->brightness = pcf_bl->bl->props.brightness + 1; - - backlight_update_status(pcf_bl->bl); - - return 0; -} - -static int __devexit pcf50633_bl_remove(struct platform_device *pdev) -{ - struct pcf50633_bl *pcf_bl = platform_get_drvdata(pdev); - - backlight_device_unregister(pcf_bl->bl); - - platform_set_drvdata(pdev, NULL); - - return 0; -} - -static struct platform_driver pcf50633_bl_driver = { - .probe = pcf50633_bl_probe, - .remove = __devexit_p(pcf50633_bl_remove), - .driver = { - .name = "pcf50633-backlight", - }, -}; - -module_platform_driver(pcf50633_bl_driver); - -MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); -MODULE_DESCRIPTION("PCF50633 backlight driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:pcf50633-backlight"); |