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drivers/video/backlight: remove unused aw9364_bl driver
Change-Id: Iaa1b9f28f9cf4fbf94c0239e8e617a227b631bd9 Signed-off-by: Tao Huang <huangtao@rock-chips.com>
This commit is contained in:
Tao Huang
@@ -1,280 +0,0 @@
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/*
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* Backlight driver for Wolfson Microelectronics WM831x PMICs
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*
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* Copyright 2009 Wolfson Microelectonics plc
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/fb.h>
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#include <linux/backlight.h>
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#include <linux/slab.h>
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#include <mach/gpio.h>
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#ifdef CONFIG_HAS_EARLYSUSPEND
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#include <linux/earlysuspend.h>
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#endif
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#include <linux/delay.h>
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#include <linux/ktime.h>
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#include "aw9364_bl.h"
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/*
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* Debug
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*/
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#if 0
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#define DBG(x...) printk(KERN_INFO x)
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#else
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#define DBG(x...)
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#endif
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#define BL_SET 255
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#define BL_INIT_VALUE 102
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struct aw9364_backlight_data {
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int pin_en;
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int current_brightness;
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#ifdef CONFIG_HAS_EARLYSUSPEND
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struct early_suspend early_suspend;
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struct delayed_work work;
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int suspend_flag;
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int shutdown_flag;
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#endif
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spinlock_t bl_lock;
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};
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#ifdef CONFIG_HAS_EARLYSUSPEND
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static struct backlight_device *g_aw9364_bl;
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static struct aw9364_backlight_data *g_aw9364_data;
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#endif
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static int aw9364_backlight_set(struct backlight_device *bl, int brightness)
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{
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struct aw9364_backlight_data *data = bl_get_data(bl);
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int i,num_clk, num_clk_to, num_clk_from;
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unsigned long flags;
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brightness = brightness & 0xff; //0-256
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num_clk_from = 16 -(data->current_brightness>>4);
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num_clk_to = 16 -(brightness>>4);
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num_clk = (16 + num_clk_to - num_clk_from)%16;
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if(brightness < 16)
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{
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gpio_direction_output(data->pin_en, GPIO_LOW);
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mdelay(3);
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}
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else {
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spin_lock_irqsave(&data->bl_lock, flags);
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for(i=0; i<num_clk; i++) //the wave should not be intterupted
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{
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gpio_set_value(data->pin_en, GPIO_LOW);
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gpio_set_value(data->pin_en, GPIO_HIGH);
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if(i==0)
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udelay(30);
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}
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spin_unlock_irqrestore(&data->bl_lock, flags);
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}
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DBG("%s:current_bl=%d,bl=%d,num_clk_to=%d,num_clk_from=%d,num_clk=%d\n",__FUNCTION__,
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data->current_brightness,brightness,num_clk_to,num_clk_from,num_clk);
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if((num_clk) || (brightness < 16))
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data->current_brightness = brightness;
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return 0;
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}
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static int aw9364_backlight_update_status(struct backlight_device *bl)
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{
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int brightness = bl->props.brightness;
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if(g_aw9364_data->suspend_flag == 1)
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brightness = 0;
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if (g_aw9364_data->shutdown_flag == 1)
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brightness = 0;
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if (bl->props.power != FB_BLANK_UNBLANK)
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brightness = 0;
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if (bl->props.fb_blank != FB_BLANK_UNBLANK)
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brightness = 0;
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if (bl->props.state & BL_CORE_SUSPENDED)
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brightness = 0;
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DBG("backlight brightness=%d\n", brightness);
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return aw9364_backlight_set(bl, brightness);
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}
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static int aw9364_backlight_get_brightness(struct backlight_device *bl)
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{
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struct aw9364_backlight_data *data = bl_get_data(bl);
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return data->current_brightness;
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}
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static struct backlight_ops aw9364_backlight_ops = {
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.options = BL_CORE_SUSPENDRESUME,
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.update_status = aw9364_backlight_update_status,
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.get_brightness = aw9364_backlight_get_brightness,
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};
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#ifdef CONFIG_HAS_EARLYSUSPEND
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static void aw9364_bl_work(struct work_struct *work)
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{
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//struct aw9364_backlight_data *aw9364_data = container_of(work, struct aw9364_backlight_data,
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//work.work);
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backlight_update_status(g_aw9364_bl);
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}
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static void aw9364_bl_suspend(struct early_suspend *h)
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{
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struct aw9364_backlight_data *aw9364_data;
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aw9364_data = container_of(h, struct aw9364_backlight_data, early_suspend);
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aw9364_data->suspend_flag = 1;
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schedule_delayed_work(&aw9364_data->work, msecs_to_jiffies(100));
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}
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static void aw9364_bl_resume(struct early_suspend *h)
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{
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struct aw9364_backlight_data *aw9364_data;
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aw9364_data = container_of(h, struct aw9364_backlight_data, early_suspend);
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aw9364_data->suspend_flag = 0;
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schedule_delayed_work(&aw9364_data->work, msecs_to_jiffies(100));
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}
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#endif
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int rk29_backlight_ctrl(int open)
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{
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if(open)
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g_aw9364_data->suspend_flag = 0;
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else
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g_aw9364_data->suspend_flag = 1;
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backlight_update_status(g_aw9364_bl);
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return 0;
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}
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static int aw9364_backlight_probe(struct platform_device *pdev)
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{
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struct aw9364_backlight_data *data;
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struct aw9364_platform_data *pdata = pdev->dev.platform_data;
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struct backlight_device *bl;
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data = kzalloc(sizeof(*data), GFP_KERNEL);
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if (data == NULL)
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return -ENOMEM;
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if(pdata && pdata->io_init)
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pdata->io_init();
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data->current_brightness = 0;
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data->pin_en = pdata->pin_en;
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bl = backlight_device_register("wm831x", &pdev->dev, data,
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&aw9364_backlight_ops, NULL);
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if (IS_ERR(bl)) {
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dev_err(&pdev->dev, "failed to register backlight\n");
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kfree(data);
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return PTR_ERR(bl);
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}
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bl->props.brightness = BL_INIT_VALUE;
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bl->props.max_brightness= BL_SET;
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if(data && data->pin_en)
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gpio_request(data->pin_en, NULL);
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else
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return -1;
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spin_lock_init(&data->bl_lock);
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platform_set_drvdata(pdev, bl);
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#ifdef CONFIG_HAS_EARLYSUSPEND
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data->early_suspend.level = ~0x0;
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data->early_suspend.suspend = aw9364_bl_suspend;
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data->early_suspend.resume = aw9364_bl_resume;
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register_early_suspend(&data->early_suspend);
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INIT_DELAYED_WORK(&data->work, aw9364_bl_work);
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g_aw9364_bl = bl;
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g_aw9364_data = data;
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#endif
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gpio_direction_output(data->pin_en, GPIO_LOW);
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mdelay(3);
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backlight_update_status(bl);
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schedule_delayed_work(&data->work, msecs_to_jiffies(100));
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printk("%s\n",__FUNCTION__);
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return 0;
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}
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static int aw9364_backlight_remove(struct platform_device *pdev)
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{
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struct backlight_device *bl = platform_get_drvdata(pdev);
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struct aw9364_backlight_data *data = bl_get_data(bl);
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backlight_device_unregister(bl);
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#ifdef CONFIG_HAS_EARLYSUSPEND
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unregister_early_suspend(&data->early_suspend);
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#endif
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kfree(data);
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return 0;
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}
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static void aw9364_backlight_shutdown(struct platform_device *pdev)
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{
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struct backlight_device *bl = platform_get_drvdata(pdev);
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struct aw9364_backlight_data *data = bl_get_data(bl);
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printk("%s\n",__FUNCTION__);
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data->shutdown_flag = 1;
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aw9364_backlight_update_status(bl);
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return;
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}
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static struct platform_driver aw9364_backlight_driver = {
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.driver = {
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.name = "aw9364_backlight",
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.owner = THIS_MODULE,
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},
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.probe = aw9364_backlight_probe,
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.remove = aw9364_backlight_remove,
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.shutdown = aw9364_backlight_shutdown,
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};
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static int __init aw9364_backlight_init(void)
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{
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return platform_driver_register(&aw9364_backlight_driver);
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}
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module_init(aw9364_backlight_init);
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static void __exit aw9364_backlight_exit(void)
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{
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platform_driver_unregister(&aw9364_backlight_driver);
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}
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module_exit(aw9364_backlight_exit);
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MODULE_DESCRIPTION("Backlight Driver for AW9364");
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MODULE_AUTHOR("luo wei <lw@rock-chips.com");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:aw9364-backlight");
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@@ -1,13 +0,0 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __DRIVERS_TOUCHSCREEN_AW9364_TS_H
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#define __DRIVERS_TOUCHSCREEN_AW9364_TS_H
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struct aw9364_platform_data {
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int pin_en;
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int current_brightness;
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int (*io_init)(void);
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int (*io_deinit)(void);
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};
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#endif
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