diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/video/backlight/max8925_bl.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/video/backlight/max8925_bl.c | 193 |
1 files changed, 0 insertions, 193 deletions
diff --git a/ANDROID_3.4.5/drivers/video/backlight/max8925_bl.c b/ANDROID_3.4.5/drivers/video/backlight/max8925_bl.c deleted file mode 100644 index e833ac72..00000000 --- a/ANDROID_3.4.5/drivers/video/backlight/max8925_bl.c +++ /dev/null @@ -1,193 +0,0 @@ -/* - * Backlight driver for Maxim MAX8925 - * - * Copyright (C) 2009 Marvell International Ltd. - * Haojian Zhuang <haojian.zhuang@marvell.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. - */ - -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/platform_device.h> -#include <linux/fb.h> -#include <linux/i2c.h> -#include <linux/backlight.h> -#include <linux/mfd/max8925.h> -#include <linux/slab.h> -#include <linux/module.h> - -#define MAX_BRIGHTNESS (0xff) -#define MIN_BRIGHTNESS (0) - -#define LWX_FREQ(x) (((x - 601) / 100) & 0x7) - -struct max8925_backlight_data { - struct max8925_chip *chip; - - int current_brightness; -}; - -static int max8925_backlight_set(struct backlight_device *bl, int brightness) -{ - struct max8925_backlight_data *data = bl_get_data(bl); - struct max8925_chip *chip = data->chip; - unsigned char value; - int ret; - - if (brightness > MAX_BRIGHTNESS) - value = MAX_BRIGHTNESS; - else - value = brightness; - - ret = max8925_reg_write(chip->i2c, MAX8925_WLED_CNTL, value); - if (ret < 0) - goto out; - - if (!data->current_brightness && brightness) - /* enable WLED output */ - ret = max8925_set_bits(chip->i2c, MAX8925_WLED_MODE_CNTL, 1, 1); - else if (!brightness) - /* disable WLED output */ - ret = max8925_set_bits(chip->i2c, MAX8925_WLED_MODE_CNTL, 1, 0); - if (ret < 0) - goto out; - dev_dbg(chip->dev, "set brightness %d\n", value); - data->current_brightness = value; - return 0; -out: - dev_dbg(chip->dev, "set brightness %d failure with return value:%d\n", - value, ret); - return ret; -} - -static int max8925_backlight_update_status(struct backlight_device *bl) -{ - int brightness = bl->props.brightness; - - if (bl->props.power != FB_BLANK_UNBLANK) - brightness = 0; - - if (bl->props.fb_blank != FB_BLANK_UNBLANK) - brightness = 0; - - if (bl->props.state & BL_CORE_SUSPENDED) - brightness = 0; - - return max8925_backlight_set(bl, brightness); -} - -static int max8925_backlight_get_brightness(struct backlight_device *bl) -{ - struct max8925_backlight_data *data = bl_get_data(bl); - struct max8925_chip *chip = data->chip; - int ret; - - ret = max8925_reg_read(chip->i2c, MAX8925_WLED_CNTL); - if (ret < 0) - return -EINVAL; - data->current_brightness = ret; - dev_dbg(chip->dev, "get brightness %d\n", data->current_brightness); - return ret; -} - -static const struct backlight_ops max8925_backlight_ops = { - .options = BL_CORE_SUSPENDRESUME, - .update_status = max8925_backlight_update_status, - .get_brightness = max8925_backlight_get_brightness, -}; - -static int __devinit max8925_backlight_probe(struct platform_device *pdev) -{ - struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent); - struct max8925_platform_data *max8925_pdata; - struct max8925_backlight_pdata *pdata = NULL; - struct max8925_backlight_data *data; - struct backlight_device *bl; - struct backlight_properties props; - struct resource *res; - char name[MAX8925_NAME_SIZE]; - unsigned char value; - int ret; - - res = platform_get_resource(pdev, IORESOURCE_IO, 0); - if (res == NULL) { - dev_err(&pdev->dev, "No I/O resource!\n"); - return -EINVAL; - } - - if (pdev->dev.parent->platform_data) { - max8925_pdata = pdev->dev.parent->platform_data; - pdata = max8925_pdata->backlight; - } - - if (!pdata) { - dev_err(&pdev->dev, "platform data isn't assigned to " - "backlight\n"); - return -EINVAL; - } - - data = devm_kzalloc(&pdev->dev, sizeof(struct max8925_backlight_data), - GFP_KERNEL); - if (data == NULL) - return -ENOMEM; - strncpy(name, res->name, MAX8925_NAME_SIZE); - data->chip = chip; - data->current_brightness = 0; - - memset(&props, 0, sizeof(struct backlight_properties)); - props.type = BACKLIGHT_RAW; - props.max_brightness = MAX_BRIGHTNESS; - bl = backlight_device_register(name, &pdev->dev, data, - &max8925_backlight_ops, &props); - if (IS_ERR(bl)) { - dev_err(&pdev->dev, "failed to register backlight\n"); - return PTR_ERR(bl); - } - bl->props.brightness = MAX_BRIGHTNESS; - - platform_set_drvdata(pdev, bl); - - value = 0; - if (pdata->lxw_scl) - value |= (1 << 7); - if (pdata->lxw_freq) - value |= (LWX_FREQ(pdata->lxw_freq) << 4); - if (pdata->dual_string) - value |= (1 << 1); - ret = max8925_set_bits(chip->i2c, MAX8925_WLED_MODE_CNTL, 0xfe, value); - if (ret < 0) - goto out; - - backlight_update_status(bl); - return 0; -out: - backlight_device_unregister(bl); - return ret; -} - -static int __devexit max8925_backlight_remove(struct platform_device *pdev) -{ - struct backlight_device *bl = platform_get_drvdata(pdev); - - backlight_device_unregister(bl); - return 0; -} - -static struct platform_driver max8925_backlight_driver = { - .driver = { - .name = "max8925-backlight", - .owner = THIS_MODULE, - }, - .probe = max8925_backlight_probe, - .remove = __devexit_p(max8925_backlight_remove), -}; - -module_platform_driver(max8925_backlight_driver); - -MODULE_DESCRIPTION("Backlight Driver for Maxim MAX8925"); -MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:max8925-backlight"); |