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drivers/video/backlight: remove unused fih_touchkey_led driver
Change-Id: I4e09e37c260988854e9900525b886b93b7f82ee4 Signed-off-by: Tao Huang <huangtao@rock-chips.com>
This commit is contained in:
Tao Huang
@@ -1,273 +0,0 @@
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/* drivers/video/backlight/rk29_backlight.c
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*
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* Copyright (C) 2009-2011 Rockchip Corporation.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/err.h>
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#include <linux/delay.h>
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#include <linux/platform_device.h>
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#include <linux/backlight.h>
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#include <linux/fb.h>
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#include <linux/clk.h>
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#include <linux/earlysuspend.h>
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#include <asm/io.h>
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#include <mach/rk29_iomap.h>
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#include <mach/board.h>
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#include "rk2818_backlight.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 write_pwm_reg(id, addr, val) __raw_writel(val, addr+(RK29_PWM_BASE+id*0x10))
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#define read_pwm_reg(id, addr) __raw_readl(addr+(RK29_PWM_BASE+id*0x10))
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static struct clk *pwm_clk;
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static struct backlight_device *fih_touchkey_led;
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static int suspend_flag = 0;
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static int fih_touchkey_led_update_status(struct backlight_device *bl)
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{
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u32 divh,div_total;
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struct rk29_bl_info *fih_touchkey_led_info = bl_get_data(bl);
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u32 id = fih_touchkey_led_info->pwm_id;
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u32 ref = fih_touchkey_led_info->bl_ref;
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if (suspend_flag)
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return 0;
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if (bl->props.brightness < fih_touchkey_led_info->min_brightness) /*avoid can't view screen when close backlight*/
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bl->props.brightness = fih_touchkey_led_info->min_brightness;
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div_total = read_pwm_reg(id, PWM_REG_LRC);
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if (ref) {
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divh = div_total*(bl->props.brightness)/BL_STEP;
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} else {
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divh = div_total*(BL_STEP-bl->props.brightness)/BL_STEP;
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}
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write_pwm_reg(id, PWM_REG_HRC, divh);
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DBG(">>>%s-->%d brightness = %d, div_total = %d, divh = %d\n",__FUNCTION__,__LINE__,bl->props.brightness, div_total, divh);
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return 0;
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}
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static int fih_touchkey_led_get_brightness(struct backlight_device *bl)
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{
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u32 divh,div_total;
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struct rk29_bl_info *fih_touchkey_led_info = bl_get_data(bl);
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u32 id = fih_touchkey_led_info->pwm_id;
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u32 ref = fih_touchkey_led_info->bl_ref;
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div_total = read_pwm_reg(id, PWM_REG_LRC);
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divh = read_pwm_reg(id, PWM_REG_HRC);
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if (!div_total)
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return 0;
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if (ref) {
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return BL_STEP*divh/div_total;
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} else {
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return BL_STEP-(BL_STEP*divh/div_total);
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}
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}
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static struct backlight_ops fih_touchkey_led_ops = {
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.update_status = fih_touchkey_led_update_status,
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.get_brightness = fih_touchkey_led_get_brightness,
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};
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static void fih_touchkey_led_work_func(struct work_struct *work)
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{
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suspend_flag = 0;
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fih_touchkey_led_update_status(fih_touchkey_led);
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}
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static DECLARE_DELAYED_WORK(fih_touchkey_led_work, fih_touchkey_led_work_func);
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#ifdef CONFIG_HAS_EARLYSUSPEND
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static void fih_touchkey_led_suspend(struct early_suspend *h)
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{
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struct rk29_bl_info *fih_touchkey_led_info = bl_get_data(fih_touchkey_led);
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int brightness = fih_touchkey_led->props.brightness;
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cancel_delayed_work_sync(&fih_touchkey_led_work);
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if (fih_touchkey_led->props.brightness) {
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fih_touchkey_led->props.brightness = 0;
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fih_touchkey_led_update_status(fih_touchkey_led);
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fih_touchkey_led->props.brightness = brightness;
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}
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if (!suspend_flag) {
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clk_disable(pwm_clk);
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if (fih_touchkey_led_info->pwm_suspend)
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fih_touchkey_led_info->pwm_suspend();
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}
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suspend_flag = 1;
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}
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static void fih_touchkey_led_resume(struct early_suspend *h)
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{
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struct rk29_bl_info *fih_touchkey_led_info = bl_get_data(fih_touchkey_led);
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DBG("%s : %s\n", __FILE__, __FUNCTION__);
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if (fih_touchkey_led_info->pwm_resume)
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fih_touchkey_led_info->pwm_resume();
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clk_enable(pwm_clk);
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schedule_delayed_work(&fih_touchkey_led_work, msecs_to_jiffies(fih_touchkey_led_info->delay_ms));
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}
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static struct early_suspend fih_touchkey_led_early_suspend = {
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.suspend = fih_touchkey_led_suspend,
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.resume = fih_touchkey_led_resume,
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.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN - 1,
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};
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#endif
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static int fih_touchkey_led_probe(struct platform_device *pdev)
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{
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int ret = 0;
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struct rk29_bl_info *fih_touchkey_led_info = pdev->dev.platform_data;
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u32 id = fih_touchkey_led_info->pwm_id;
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u32 divh, div_total;
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unsigned long pwm_clk_rate;
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if (fih_touchkey_led) {
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DBG(KERN_CRIT "%s: fih touchkey led device register has existed \n",
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__func__);
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return -EEXIST;
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}
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if (!fih_touchkey_led_info->delay_ms)
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fih_touchkey_led_info->delay_ms = 30;
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if (fih_touchkey_led_info->min_brightness < 0 || fih_touchkey_led_info->min_brightness > BL_STEP)
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fih_touchkey_led_info->min_brightness = 52;
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if (fih_touchkey_led_info && fih_touchkey_led_info->io_init) {
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fih_touchkey_led_info->io_init();
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}
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fih_touchkey_led = backlight_device_register("fih_touchkey_led", &pdev->dev, fih_touchkey_led_info, &fih_touchkey_led_ops);
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if (!fih_touchkey_led) {
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DBG(KERN_CRIT "%s: fih touchkey led register error\n",
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__func__);
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return -ENODEV;
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}
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pwm_clk = clk_get(NULL, "pwm");
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if (IS_ERR(pwm_clk)) {
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printk(KERN_ERR "failed to get pwm clock source\n");
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return -ENODEV;
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}
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pwm_clk_rate = clk_get_rate(pwm_clk);
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div_total = pwm_clk_rate / PWM_APB_PRE_DIV;
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div_total >>= (1 + (PWM_DIV >> 9));
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div_total = (div_total) ? div_total : 1;
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if(fih_touchkey_led_info->bl_ref) {
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divh = 0;
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} else {
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divh = div_total;
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}
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clk_enable(pwm_clk);
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write_pwm_reg(id, PWM_REG_CTRL, PWM_DIV|PWM_RESET);
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write_pwm_reg(id, PWM_REG_LRC, div_total);
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write_pwm_reg(id, PWM_REG_HRC, divh);
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write_pwm_reg(id, PWM_REG_CNTR, 0x0);
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write_pwm_reg(id, PWM_REG_CTRL, PWM_DIV|PWM_ENABLE|PWM_TIME_EN);
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fih_touchkey_led->props.power = FB_BLANK_UNBLANK;
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fih_touchkey_led->props.fb_blank = FB_BLANK_UNBLANK;
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fih_touchkey_led->props.max_brightness = BL_STEP;
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fih_touchkey_led->props.brightness = BL_STEP / 2;
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schedule_delayed_work(&fih_touchkey_led_work, msecs_to_jiffies(fih_touchkey_led_info->delay_ms));
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register_early_suspend(&fih_touchkey_led_early_suspend);
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printk("Fih touchkey led Driver Initialized.\n");
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return ret;
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}
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static int fih_touchkey_led_remove(struct platform_device *pdev)
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{
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struct rk29_bl_info *rk29_bl_info = pdev->dev.platform_data;
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if (fih_touchkey_led) {
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backlight_device_unregister(fih_touchkey_led);
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unregister_early_suspend(&fih_touchkey_led_early_suspend);
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clk_disable(pwm_clk);
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clk_put(pwm_clk);
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if (rk29_bl_info && rk29_bl_info->io_deinit) {
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rk29_bl_info->io_deinit();
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}
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return 0;
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} else {
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DBG(KERN_CRIT "%s: no Fih touchkey led device has registered\n",
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__func__);
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return -ENODEV;
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}
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}
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static void fih_touchkey_led_shutdown(struct platform_device *pdev)
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{
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struct rk29_bl_info *fih_touchkey_led_info = pdev->dev.platform_data;
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fih_touchkey_led->props.brightness >>= 1;
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fih_touchkey_led_update_status(fih_touchkey_led);
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mdelay(100);
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fih_touchkey_led->props.brightness >>= 1;
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fih_touchkey_led_update_status(fih_touchkey_led);
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mdelay(100);
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fih_touchkey_led->props.brightness = 0;
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fih_touchkey_led_update_status(fih_touchkey_led);
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if (fih_touchkey_led_info && fih_touchkey_led_info->io_deinit)
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fih_touchkey_led_info->io_deinit();
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}
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static struct platform_driver fih_touchkey_led_driver = {
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.probe = fih_touchkey_led_probe,
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.remove = fih_touchkey_led_remove,
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.driver = {
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.name = "fih_touchkey_led",
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.owner = THIS_MODULE,
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},
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.shutdown = fih_touchkey_led_shutdown,
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};
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static int __init fih_touchkey_led_init(void)
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{
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platform_driver_register(&fih_touchkey_led_driver);
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return 0;
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}
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fs_initcall_sync(fih_touchkey_led_init);
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//late_initcall_sync(fih_touchkey_led_init);
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