diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/video/backlight/88pm860x_bl.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/video/backlight/88pm860x_bl.c | 281 |
1 files changed, 0 insertions, 281 deletions
diff --git a/ANDROID_3.4.5/drivers/video/backlight/88pm860x_bl.c b/ANDROID_3.4.5/drivers/video/backlight/88pm860x_bl.c deleted file mode 100644 index f49181c7..00000000 --- a/ANDROID_3.4.5/drivers/video/backlight/88pm860x_bl.c +++ /dev/null @@ -1,281 +0,0 @@ -/* - * Backlight driver for Marvell Semiconductor 88PM8606 - * - * 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/slab.h> -#include <linux/fb.h> -#include <linux/i2c.h> -#include <linux/backlight.h> -#include <linux/mfd/88pm860x.h> -#include <linux/module.h> - -#define MAX_BRIGHTNESS (0xFF) -#define MIN_BRIGHTNESS (0) - -#define CURRENT_BITMASK (0x1F << 1) - -struct pm860x_backlight_data { - struct pm860x_chip *chip; - struct i2c_client *i2c; - int current_brightness; - int port; - int pwm; - int iset; -}; - -static inline int wled_a(int port) -{ - int ret; - - ret = ((port - PM8606_BACKLIGHT1) << 1) + 2; - return ret; -} - -static inline int wled_b(int port) -{ - int ret; - - ret = ((port - PM8606_BACKLIGHT1) << 1) + 3; - return ret; -} - -/* WLED2 & WLED3 share the same IDC */ -static inline int wled_idc(int port) -{ - int ret; - - switch (port) { - case PM8606_BACKLIGHT1: - case PM8606_BACKLIGHT2: - ret = ((port - PM8606_BACKLIGHT1) << 1) + 3; - break; - case PM8606_BACKLIGHT3: - default: - ret = ((port - PM8606_BACKLIGHT2) << 1) + 3; - break; - } - return ret; -} - -static int backlight_power_set(struct pm860x_chip *chip, int port, - int on) -{ - int ret = -EINVAL; - - switch (port) { - case PM8606_BACKLIGHT1: - ret = on ? pm8606_osc_enable(chip, WLED1_DUTY) : - pm8606_osc_disable(chip, WLED1_DUTY); - break; - case PM8606_BACKLIGHT2: - ret = on ? pm8606_osc_enable(chip, WLED2_DUTY) : - pm8606_osc_disable(chip, WLED2_DUTY); - break; - case PM8606_BACKLIGHT3: - ret = on ? pm8606_osc_enable(chip, WLED3_DUTY) : - pm8606_osc_disable(chip, WLED3_DUTY); - break; - } - return ret; -} - -static int pm860x_backlight_set(struct backlight_device *bl, int brightness) -{ - struct pm860x_backlight_data *data = bl_get_data(bl); - struct pm860x_chip *chip = data->chip; - unsigned char value; - int ret; - - if (brightness > MAX_BRIGHTNESS) - value = MAX_BRIGHTNESS; - else - value = brightness; - - if (brightness) - backlight_power_set(chip, data->port, 1); - - ret = pm860x_reg_write(data->i2c, wled_a(data->port), value); - if (ret < 0) - goto out; - - if ((data->current_brightness == 0) && brightness) { - if (data->iset) { - ret = pm860x_set_bits(data->i2c, wled_idc(data->port), - CURRENT_BITMASK, data->iset); - if (ret < 0) - goto out; - } - if (data->pwm) { - ret = pm860x_set_bits(data->i2c, PM8606_PWM, - PM8606_PWM_FREQ_MASK, data->pwm); - if (ret < 0) - goto out; - } - if (brightness == MAX_BRIGHTNESS) { - /* set WLED_ON bit as 100% */ - ret = pm860x_set_bits(data->i2c, wled_b(data->port), - PM8606_WLED_ON, PM8606_WLED_ON); - } - } else { - if (brightness == MAX_BRIGHTNESS) { - /* set WLED_ON bit as 100% */ - ret = pm860x_set_bits(data->i2c, wled_b(data->port), - PM8606_WLED_ON, PM8606_WLED_ON); - } else { - /* clear WLED_ON bit since it's not 100% */ - ret = pm860x_set_bits(data->i2c, wled_b(data->port), - PM8606_WLED_ON, 0); - } - } - if (ret < 0) - goto out; - - if (brightness == 0) - backlight_power_set(chip, data->port, 0); - - 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 pm860x_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 pm860x_backlight_set(bl, brightness); -} - -static int pm860x_backlight_get_brightness(struct backlight_device *bl) -{ - struct pm860x_backlight_data *data = bl_get_data(bl); - struct pm860x_chip *chip = data->chip; - int ret; - - ret = pm860x_reg_read(data->i2c, wled_a(data->port)); - if (ret < 0) - goto out; - data->current_brightness = ret; - dev_dbg(chip->dev, "get brightness %d\n", data->current_brightness); - return data->current_brightness; -out: - return -EINVAL; -} - -static const struct backlight_ops pm860x_backlight_ops = { - .options = BL_CORE_SUSPENDRESUME, - .update_status = pm860x_backlight_update_status, - .get_brightness = pm860x_backlight_get_brightness, -}; - -static int pm860x_backlight_probe(struct platform_device *pdev) -{ - struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); - struct pm860x_backlight_pdata *pdata = NULL; - struct pm860x_backlight_data *data; - struct backlight_device *bl; - struct resource *res; - struct backlight_properties props; - char name[MFD_NAME_SIZE]; - int ret; - - res = platform_get_resource(pdev, IORESOURCE_IO, 0); - if (res == NULL) { - dev_err(&pdev->dev, "No I/O resource!\n"); - return -EINVAL; - } - - pdata = pdev->dev.platform_data; - if (pdata == NULL) { - dev_err(&pdev->dev, "platform data isn't assigned to " - "backlight\n"); - return -EINVAL; - } - - data = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_backlight_data), - GFP_KERNEL); - if (data == NULL) - return -ENOMEM; - strncpy(name, res->name, MFD_NAME_SIZE); - data->chip = chip; - data->i2c = (chip->id == CHIP_PM8606) ? chip->client \ - : chip->companion; - data->current_brightness = MAX_BRIGHTNESS; - data->pwm = pdata->pwm; - data->iset = pdata->iset; - data->port = pdata->flags; - if (data->port < 0) { - dev_err(&pdev->dev, "wrong platform data is assigned"); - return -EINVAL; - } - - memset(&props, 0, sizeof(struct backlight_properties)); - props.type = BACKLIGHT_RAW; - props.max_brightness = MAX_BRIGHTNESS; - bl = backlight_device_register(name, &pdev->dev, data, - &pm860x_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); - - /* read current backlight */ - ret = pm860x_backlight_get_brightness(bl); - if (ret < 0) - goto out; - - backlight_update_status(bl); - return 0; -out: - backlight_device_unregister(bl); - return ret; -} - -static int pm860x_backlight_remove(struct platform_device *pdev) -{ - struct backlight_device *bl = platform_get_drvdata(pdev); - - backlight_device_unregister(bl); - return 0; -} - -static struct platform_driver pm860x_backlight_driver = { - .driver = { - .name = "88pm860x-backlight", - .owner = THIS_MODULE, - }, - .probe = pm860x_backlight_probe, - .remove = pm860x_backlight_remove, -}; - -module_platform_driver(pm860x_backlight_driver); - -MODULE_DESCRIPTION("Backlight Driver for Marvell Semiconductor 88PM8606"); -MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:88pm860x-backlight"); |