9480e307cd
In PM v1, all devices were called at SUSPEND_DISABLE level. Then all devices were called at SUSPEND_SAVE_STATE level, and finally SUSPEND_POWER_DOWN level. However, with PM v2, to maintain compatibility for platform devices, I arranged for the PM v2 suspend/resume callbacks to call the old PM v1 suspend/resume callbacks three times with each level in order so that existing drivers continued to work. Since this is obsolete infrastructure which is no longer necessary, we can remove it. Here's an (untested) patch to do exactly that. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
194 lines
4.3 KiB
C
194 lines
4.3 KiB
C
/*
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* Backlight Driver for Sharp Corgi
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*
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* Copyright (c) 2004-2005 Richard Purdie
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*
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* Based on Sharp's 2.4 Backlight Driver
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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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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/spinlock.h>
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#include <linux/fb.h>
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#include <linux/backlight.h>
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#include <asm/arch/sharpsl.h>
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#define CORGI_DEFAULT_INTENSITY 0x1f
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#define CORGI_LIMIT_MASK 0x0b
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static int corgibl_powermode = FB_BLANK_UNBLANK;
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static int current_intensity = 0;
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static int corgibl_limit = 0;
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static void (*corgibl_mach_set_intensity)(int intensity);
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static spinlock_t bl_lock = SPIN_LOCK_UNLOCKED;
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static struct backlight_properties corgibl_data;
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static void corgibl_send_intensity(int intensity)
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{
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unsigned long flags;
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void (*corgi_kick_batt)(void);
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if (corgibl_powermode != FB_BLANK_UNBLANK) {
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intensity = 0;
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} else {
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if (corgibl_limit)
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intensity &= CORGI_LIMIT_MASK;
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}
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spin_lock_irqsave(&bl_lock, flags);
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corgibl_mach_set_intensity(intensity);
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spin_unlock_irqrestore(&bl_lock, flags);
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}
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static void corgibl_blank(int blank)
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{
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switch(blank) {
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case FB_BLANK_NORMAL:
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case FB_BLANK_VSYNC_SUSPEND:
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case FB_BLANK_HSYNC_SUSPEND:
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case FB_BLANK_POWERDOWN:
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if (corgibl_powermode == FB_BLANK_UNBLANK) {
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corgibl_send_intensity(0);
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corgibl_powermode = blank;
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}
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break;
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case FB_BLANK_UNBLANK:
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if (corgibl_powermode != FB_BLANK_UNBLANK) {
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corgibl_powermode = blank;
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corgibl_send_intensity(current_intensity);
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}
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break;
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}
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}
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#ifdef CONFIG_PM
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static int corgibl_suspend(struct device *dev, pm_message_t state)
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{
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corgibl_blank(FB_BLANK_POWERDOWN);
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return 0;
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}
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static int corgibl_resume(struct device *dev)
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{
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corgibl_blank(FB_BLANK_UNBLANK);
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return 0;
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}
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#else
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#define corgibl_suspend NULL
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#define corgibl_resume NULL
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#endif
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static int corgibl_set_power(struct backlight_device *bd, int state)
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{
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corgibl_blank(state);
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return 0;
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}
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static int corgibl_get_power(struct backlight_device *bd)
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{
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return corgibl_powermode;
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}
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static int corgibl_set_intensity(struct backlight_device *bd, int intensity)
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{
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if (intensity > corgibl_data.max_brightness)
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intensity = corgibl_data.max_brightness;
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corgibl_send_intensity(intensity);
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current_intensity=intensity;
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return 0;
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}
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static int corgibl_get_intensity(struct backlight_device *bd)
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{
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return current_intensity;
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}
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/*
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* Called when the battery is low to limit the backlight intensity.
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* If limit==0 clear any limit, otherwise limit the intensity
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*/
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void corgibl_limit_intensity(int limit)
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{
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corgibl_limit = (limit ? 1 : 0);
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corgibl_send_intensity(current_intensity);
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}
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EXPORT_SYMBOL(corgibl_limit_intensity);
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static struct backlight_properties corgibl_data = {
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.owner = THIS_MODULE,
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.get_power = corgibl_get_power,
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.set_power = corgibl_set_power,
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.get_brightness = corgibl_get_intensity,
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.set_brightness = corgibl_set_intensity,
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};
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static struct backlight_device *corgi_backlight_device;
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static int __init corgibl_probe(struct device *dev)
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{
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struct corgibl_machinfo *machinfo = dev->platform_data;
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corgibl_data.max_brightness = machinfo->max_intensity;
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corgibl_mach_set_intensity = machinfo->set_bl_intensity;
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corgi_backlight_device = backlight_device_register ("corgi-bl",
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NULL, &corgibl_data);
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if (IS_ERR (corgi_backlight_device))
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return PTR_ERR (corgi_backlight_device);
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corgibl_set_intensity(NULL, CORGI_DEFAULT_INTENSITY);
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corgibl_limit_intensity(0);
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printk("Corgi Backlight Driver Initialized.\n");
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return 0;
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}
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static int corgibl_remove(struct device *dev)
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{
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backlight_device_unregister(corgi_backlight_device);
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corgibl_set_intensity(NULL, 0);
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printk("Corgi Backlight Driver Unloaded\n");
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return 0;
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}
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static struct device_driver corgibl_driver = {
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.name = "corgi-bl",
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.bus = &platform_bus_type,
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.probe = corgibl_probe,
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.remove = corgibl_remove,
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.suspend = corgibl_suspend,
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.resume = corgibl_resume,
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};
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static int __init corgibl_init(void)
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{
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return driver_register(&corgibl_driver);
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}
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static void __exit corgibl_exit(void)
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{
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driver_unregister(&corgibl_driver);
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}
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module_init(corgibl_init);
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module_exit(corgibl_exit);
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MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>");
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MODULE_DESCRIPTION("Corgi Backlight Driver");
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MODULE_LICENSE("GPLv2");
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