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path: root/ANDROID_3.4.5/drivers/video/backlight/aat2870_bl.c
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Diffstat (limited to 'ANDROID_3.4.5/drivers/video/backlight/aat2870_bl.c')
-rw-r--r--ANDROID_3.4.5/drivers/video/backlight/aat2870_bl.c245
1 files changed, 0 insertions, 245 deletions
diff --git a/ANDROID_3.4.5/drivers/video/backlight/aat2870_bl.c b/ANDROID_3.4.5/drivers/video/backlight/aat2870_bl.c
deleted file mode 100644
index 7ff75228..00000000
--- a/ANDROID_3.4.5/drivers/video/backlight/aat2870_bl.c
+++ /dev/null
@@ -1,245 +0,0 @@
-/*
- * linux/drivers/video/backlight/aat2870_bl.c
- *
- * Copyright (c) 2011, NVIDIA Corporation.
- * Author: Jin Park <jinyoungp@nvidia.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 program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * 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., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
-#include <linux/mutex.h>
-#include <linux/delay.h>
-#include <linux/fb.h>
-#include <linux/backlight.h>
-#include <linux/mfd/aat2870.h>
-
-struct aat2870_bl_driver_data {
- struct platform_device *pdev;
- struct backlight_device *bd;
-
- int channels;
- int max_current;
- int brightness; /* current brightness */
-};
-
-static inline int aat2870_brightness(struct aat2870_bl_driver_data *aat2870_bl,
- int brightness)
-{
- struct backlight_device *bd = aat2870_bl->bd;
- int val;
-
- val = brightness * (aat2870_bl->max_current - 1);
- val /= bd->props.max_brightness;
-
- return val;
-}
-
-static inline int aat2870_bl_enable(struct aat2870_bl_driver_data *aat2870_bl)
-{
- struct aat2870_data *aat2870
- = dev_get_drvdata(aat2870_bl->pdev->dev.parent);
-
- return aat2870->write(aat2870, AAT2870_BL_CH_EN,
- (u8)aat2870_bl->channels);
-}
-
-static inline int aat2870_bl_disable(struct aat2870_bl_driver_data *aat2870_bl)
-{
- struct aat2870_data *aat2870
- = dev_get_drvdata(aat2870_bl->pdev->dev.parent);
-
- return aat2870->write(aat2870, AAT2870_BL_CH_EN, 0x0);
-}
-
-static int aat2870_bl_get_brightness(struct backlight_device *bd)
-{
- return bd->props.brightness;
-}
-
-static int aat2870_bl_update_status(struct backlight_device *bd)
-{
- struct aat2870_bl_driver_data *aat2870_bl = dev_get_drvdata(&bd->dev);
- struct aat2870_data *aat2870 =
- dev_get_drvdata(aat2870_bl->pdev->dev.parent);
- int brightness = bd->props.brightness;
- int ret;
-
- if ((brightness < 0) || (bd->props.max_brightness < brightness)) {
- dev_err(&bd->dev, "invalid brightness, %d\n", brightness);
- return -EINVAL;
- }
-
- dev_dbg(&bd->dev, "brightness=%d, power=%d, state=%d\n",
- bd->props.brightness, bd->props.power, bd->props.state);
-
- if ((bd->props.power != FB_BLANK_UNBLANK) ||
- (bd->props.state & BL_CORE_FBBLANK) ||
- (bd->props.state & BL_CORE_SUSPENDED))
- brightness = 0;
-
- ret = aat2870->write(aat2870, AAT2870_BLM,
- (u8)aat2870_brightness(aat2870_bl, brightness));
- if (ret < 0)
- return ret;
-
- if (brightness == 0) {
- ret = aat2870_bl_disable(aat2870_bl);
- if (ret < 0)
- return ret;
- } else if (aat2870_bl->brightness == 0) {
- ret = aat2870_bl_enable(aat2870_bl);
- if (ret < 0)
- return ret;
- }
-
- aat2870_bl->brightness = brightness;
-
- return 0;
-}
-
-static int aat2870_bl_check_fb(struct backlight_device *bd, struct fb_info *fi)
-{
- return 1;
-}
-
-static const struct backlight_ops aat2870_bl_ops = {
- .options = BL_CORE_SUSPENDRESUME,
- .get_brightness = aat2870_bl_get_brightness,
- .update_status = aat2870_bl_update_status,
- .check_fb = aat2870_bl_check_fb,
-};
-
-static int aat2870_bl_probe(struct platform_device *pdev)
-{
- struct aat2870_bl_platform_data *pdata = pdev->dev.platform_data;
- struct aat2870_bl_driver_data *aat2870_bl;
- struct backlight_device *bd;
- struct backlight_properties props;
- int ret = 0;
-
- if (!pdata) {
- dev_err(&pdev->dev, "No platform data\n");
- ret = -ENXIO;
- goto out;
- }
-
- if (pdev->id != AAT2870_ID_BL) {
- dev_err(&pdev->dev, "Invalid device ID, %d\n", pdev->id);
- ret = -EINVAL;
- goto out;
- }
-
- aat2870_bl = devm_kzalloc(&pdev->dev,
- sizeof(struct aat2870_bl_driver_data),
- GFP_KERNEL);
- if (!aat2870_bl) {
- dev_err(&pdev->dev,
- "Failed to allocate memory for aat2870 backlight\n");
- ret = -ENOMEM;
- goto out;
- }
-
- memset(&props, 0, sizeof(struct backlight_properties));
-
- props.type = BACKLIGHT_RAW;
- bd = backlight_device_register("aat2870-backlight", &pdev->dev,
- aat2870_bl, &aat2870_bl_ops, &props);
- if (IS_ERR(bd)) {
- dev_err(&pdev->dev,
- "Failed allocate memory for backlight device\n");
- ret = PTR_ERR(bd);
- goto out;
- }
-
- aat2870_bl->pdev = pdev;
- platform_set_drvdata(pdev, aat2870_bl);
-
- aat2870_bl->bd = bd;
-
- if (pdata->channels > 0)
- aat2870_bl->channels = pdata->channels;
- else
- aat2870_bl->channels = AAT2870_BL_CH_ALL;
-
- if (pdata->max_current > 0)
- aat2870_bl->max_current = pdata->max_current;
- else
- aat2870_bl->max_current = AAT2870_CURRENT_27_9;
-
- if (pdata->max_brightness > 0)
- bd->props.max_brightness = pdata->max_brightness;
- else
- bd->props.max_brightness = 255;
-
- aat2870_bl->brightness = 0;
- bd->props.power = FB_BLANK_UNBLANK;
- bd->props.brightness = bd->props.max_brightness;
-
- ret = aat2870_bl_update_status(bd);
- if (ret < 0) {
- dev_err(&pdev->dev, "Failed to initialize\n");
- goto out_bl_dev_unregister;
- }
-
- return 0;
-
-out_bl_dev_unregister:
- backlight_device_unregister(bd);
-out:
- return ret;
-}
-
-static int aat2870_bl_remove(struct platform_device *pdev)
-{
- struct aat2870_bl_driver_data *aat2870_bl = platform_get_drvdata(pdev);
- struct backlight_device *bd = aat2870_bl->bd;
-
- bd->props.power = FB_BLANK_POWERDOWN;
- bd->props.brightness = 0;
- backlight_update_status(bd);
-
- backlight_device_unregister(bd);
-
- return 0;
-}
-
-static struct platform_driver aat2870_bl_driver = {
- .driver = {
- .name = "aat2870-backlight",
- .owner = THIS_MODULE,
- },
- .probe = aat2870_bl_probe,
- .remove = aat2870_bl_remove,
-};
-
-static int __init aat2870_bl_init(void)
-{
- return platform_driver_register(&aat2870_bl_driver);
-}
-subsys_initcall(aat2870_bl_init);
-
-static void __exit aat2870_bl_exit(void)
-{
- platform_driver_unregister(&aat2870_bl_driver);
-}
-module_exit(aat2870_bl_exit);
-
-MODULE_DESCRIPTION("AnalogicTech AAT2870 Backlight");
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Jin Park <jinyoungp@nvidia.com>");
generated by cgit (git 2.34.1) at 2025-01-08 05:57:10 +0000