cregit-Linux how code gets into the kernel

Release 4.11 drivers/video/backlight/hp680_bl.c

/*
 *  Backlight Driver for HP Jornada 680
 *
 *  Copyright (c) 2005 Andriy Skulysh
 *
 *  Based on Sharp's Corgi Backlight Driver
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
#include <linux/fb.h>
#include <linux/backlight.h>

#include <cpu/dac.h>
#include <mach/hp6xx.h>
#include <asm/hd64461.h>


#define HP680_MAX_INTENSITY 255

#define HP680_DEFAULT_INTENSITY 10


static int hp680bl_suspended;

static int current_intensity;
static DEFINE_SPINLOCK(bl_lock);


static void hp680bl_send_intensity(struct backlight_device *bd) { unsigned long flags; u16 v; int intensity = bd->props.brightness; if (bd->props.power != FB_BLANK_UNBLANK) intensity = 0; if (bd->props.fb_blank != FB_BLANK_UNBLANK) intensity = 0; if (hp680bl_suspended) intensity = 0; spin_lock_irqsave(&bl_lock, flags); if (intensity && current_intensity == 0) { sh_dac_enable(DAC_LCD_BRIGHTNESS); v = inw(HD64461_GPBDR); v &= ~HD64461_GPBDR_LCDOFF; outw(v, HD64461_GPBDR); sh_dac_output(255-(u8)intensity, DAC_LCD_BRIGHTNESS); } else if (intensity == 0 && current_intensity != 0) { sh_dac_output(255-(u8)intensity, DAC_LCD_BRIGHTNESS); sh_dac_disable(DAC_LCD_BRIGHTNESS); v = inw(HD64461_GPBDR); v |= HD64461_GPBDR_LCDOFF; outw(v, HD64461_GPBDR); } else if (intensity) { sh_dac_output(255-(u8)intensity, DAC_LCD_BRIGHTNESS); } spin_unlock_irqrestore(&bl_lock, flags); current_intensity = intensity; }

Contributors

PersonTokensPropCommitsCommitProp
Richard Purdie10955.61%266.67%
Andriy Skulysh8744.39%133.33%
Total196100.00%3100.00%

#ifdef CONFIG_PM_SLEEP
static int hp680bl_suspend(struct device *dev) { struct backlight_device *bd = dev_get_drvdata(dev); hp680bl_suspended = 1; hp680bl_send_intensity(bd); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Andriy Skulysh1545.45%125.00%
Richard Purdie1442.42%250.00%
Jingoo Han412.12%125.00%
Total33100.00%4100.00%


static int hp680bl_resume(struct device *dev) { struct backlight_device *bd = dev_get_drvdata(dev); hp680bl_suspended = 0; hp680bl_send_intensity(bd); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Andriy Skulysh1545.45%125.00%
Richard Purdie1442.42%250.00%
Jingoo Han412.12%125.00%
Total33100.00%4100.00%

#endif static SIMPLE_DEV_PM_OPS(hp680bl_pm_ops, hp680bl_suspend, hp680bl_resume);
static int hp680bl_set_intensity(struct backlight_device *bd) { hp680bl_send_intensity(bd); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Andriy Skulysh1894.74%150.00%
Richard Purdie15.26%150.00%
Total19100.00%2100.00%


static int hp680bl_get_intensity(struct backlight_device *bd) { return current_intensity; }

Contributors

PersonTokensPropCommitsCommitProp
Andriy Skulysh14100.00%1100.00%
Total14100.00%1100.00%

static const struct backlight_ops hp680bl_ops = { .get_brightness = hp680bl_get_intensity, .update_status = hp680bl_set_intensity, };
static int hp680bl_probe(struct platform_device *pdev) { struct backlight_properties props; struct backlight_device *bd; memset(&props, 0, sizeof(struct backlight_properties)); props.type = BACKLIGHT_RAW; props.max_brightness = HP680_MAX_INTENSITY; bd = devm_backlight_device_register(&pdev->dev, "hp680-bl", &pdev->dev, NULL, &hp680bl_ops, &props); if (IS_ERR(bd)) return PTR_ERR(bd); platform_set_drvdata(pdev, bd); bd->props.brightness = HP680_DEFAULT_INTENSITY; hp680bl_send_intensity(bd); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Andriy Skulysh3532.71%112.50%
Richard Purdie3330.84%450.00%
Matthew Garrett3330.84%225.00%
Jingoo Han65.61%112.50%
Total107100.00%8100.00%


static int hp680bl_remove(struct platform_device *pdev) { struct backlight_device *bd = platform_get_drvdata(pdev); bd->props.brightness = 0; bd->props.power = 0; hp680bl_send_intensity(bd); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Henrique de Moraes Holschuh1431.11%120.00%
Richard Purdie1328.89%240.00%
Andriy Skulysh1226.67%120.00%
Kristoffer Ericson613.33%120.00%
Total45100.00%5100.00%

static struct platform_driver hp680bl_driver = { .probe = hp680bl_probe, .remove = hp680bl_remove, .driver = { .name = "hp680-bl", .pm = &hp680bl_pm_ops, }, }; static struct platform_device *hp680bl_device;
static int __init hp680bl_init(void) { int ret; ret = platform_driver_register(&hp680bl_driver); if (ret) return ret; hp680bl_device = platform_device_register_simple("hp680-bl", -1, NULL, 0); if (IS_ERR(hp680bl_device)) { platform_driver_unregister(&hp680bl_driver); return PTR_ERR(hp680bl_device); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Andriy Skulysh3452.31%133.33%
Akinobu Mita1624.62%133.33%
Richard Purdie1523.08%133.33%
Total65100.00%3100.00%


static void __exit hp680bl_exit(void) { platform_device_unregister(hp680bl_device); platform_driver_unregister(&hp680bl_driver); }

Contributors

PersonTokensPropCommitsCommitProp
Andriy Skulysh1995.00%150.00%
Richard Purdie15.00%150.00%
Total20100.00%2100.00%

module_init(hp680bl_init); module_exit(hp680bl_exit); MODULE_AUTHOR("Andriy Skulysh <askulysh@gmail.com>"); MODULE_DESCRIPTION("HP Jornada 680 Backlight Driver"); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
Andriy Skulysh36052.79%211.76%
Richard Purdie21531.52%423.53%
Matthew Garrett334.84%211.76%
Jingoo Han314.55%211.76%
Akinobu Mita162.35%15.88%
Henrique de Moraes Holschuh142.05%15.88%
Kristoffer Ericson60.88%15.88%
Ingo Molnar40.59%15.88%
Paul Mundt20.29%211.76%
Emese Revfy10.15%15.88%
Total682100.00%17100.00%
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