xattr_trusted.rar_trusted

/* * Backlight driver for Dialog Semiconductor DA9030/DA9034 * * Copyright (C) 2008 Compulab, Ltd. * Mike Rapoport <mike@compulab.co.il> * * Copyright (C) 2006-2008 Marvell International Ltd. * Eric Miao <eric.miao@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/kernel.h> #include <linux/init.h> #include <linux/platform_device.h> #include <linux/fb.h> #include <linux/backlight.h> #include <linux/mfd/da903x.h> #include <linux/slab.h> #include <linux/module.h> #define DA9030_WLED_CONTROL 0x25 #define DA9030_WLED_CP_EN (1 << 6) #define DA9030_WLED_TRIM(x) ((x) & 0x7) #define DA9034_WLED_CONTROL1 0x3C #define DA9034_WLED_CONTROL2 0x3D #define DA9034_WLED_ISET(x) ((x) & 0x1f) #define DA9034_WLED_BOOST_EN (1 << 5) #define DA9030_MAX_BRIGHTNESS 7 #define DA9034_MAX_BRIGHTNESS 0x7f struct da903x_backlight_data { struct device *da903x_dev; int id; int current_brightness; }; static int da903x_backlight_set(struct backlight_device *bl, int brightness) { struct da903x_backlight_data *data = bl_get_data(bl); struct device *dev = data->da903x_dev; uint8_t val; int ret = 0; switch (data->id) { case DA9034_ID_WLED: ret = da903x_update(dev, DA9034_WLED_CONTROL1, brightness, 0x7f); if (ret) return ret; if (data->current_brightness && brightness == 0) ret = da903x_clr_bits(dev, DA9034_WLED_CONTROL2, DA9034_WLED_BOOST_EN); if (data->current_brightness == 0 && brightness) ret = da903x_set_bits(dev, DA9034_WLED_CONTROL2, DA9034_WLED_BOOST_EN); break; case DA9030_ID_WLED: val = DA9030_WLED_TRIM(brightness); val |= brightness ? DA9030_WLED_CP_EN : 0; ret = da903x_write(dev, DA9030_WLED_CONTROL, val); break; } if (ret) return ret; data->current_brightness = brightness; return 0; } static int da903x_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 da903x_backlight_set(bl, brightness); } static int da903x_backlight_get_brightness(struct backlight_device *bl) { struct da903x_backlight_data *data = bl_get_data(bl); return data->current_brightness; } static const struct backlight_ops da903x_backlight_ops = { .options = BL_CORE_SUSPENDRESUME, .update_status = da903x_backlight_update_status, .get_brightness = da903x_backlight_get_brightness, }; static int da903x_backlight_probe(struct platform_device *pdev) { struct da9034_backlight_pdata *pdata = dev_get_platdata(&pdev->dev); struct da903x_backlight_data *data; struct backlight_device *bl; struct backlight_properties props; int max_brightness; data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); if (data == NULL) return -ENOMEM; switch (pdev->id) { case DA9030_ID_WLED: max_brightness = DA9030_MAX_BRIGHTNESS; break; case DA9034_ID_WLED: max_brightness = DA9034_MAX_BRIGHTNESS; break; default: dev_err(&pdev->dev, "invalid backlight device ID(%d)\n", pdev->id); return -EINVAL; } data->id = pdev->id; data->da903x_dev = pdev->dev.parent; data->current_brightness = 0; /* adjust the WLED output current */ if (pdata) da903x_write(data->da903x_dev, DA9034_WLED_CONTROL2, DA9034_WLED_ISET(pdata->output_current)); memset(&props, 0, sizeof(props)); props.type = BACKLIGHT_RAW; props.max_brightness = max_brightness; bl = devm_backlight_device_register(&pdev->dev, pdev->name, data->da903x_dev, data, &da903x_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); backlight_update_status(bl); return 0; } static struct platform_driver da903x_backlight_driver = { .driver = { .name = "da903x-backlight", }, .probe = da903x_backlight_probe, }; module_platform_driver(da903x_backlight_driver); MODULE_DESCRIPTION("Backlight Driver for Dialog Semiconductor DA9030/DA9034"); MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"); MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:da903x-backlight");