cregit-Linux how code gets into the kernel

Release 4.14 drivers/video/backlight/generic_bl.c

/*
 *  Generic Backlight Driver
 *
 *  Copyright (c) 2004-2008 Richard Purdie
 *
 *  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.
 *
 */

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


static int genericbl_intensity;

static struct backlight_device *generic_backlight_device;

static struct generic_bl_info *bl_machinfo;

/* Flag to signal when the battery is low */

#define GENERICBL_BATTLOW       BL_CORE_DRIVER1


static int genericbl_send_intensity(struct backlight_device *bd) { int intensity = bd->props.brightness; if (bd->props.power != FB_BLANK_UNBLANK) intensity = 0; if (bd->props.state & BL_CORE_FBBLANK) intensity = 0; if (bd->props.state & BL_CORE_SUSPENDED) intensity = 0; if (bd->props.state & GENERICBL_BATTLOW) intensity &= bl_machinfo->limit_mask; bl_machinfo->set_bl_intensity(intensity); genericbl_intensity = intensity; if (bl_machinfo->kick_battery) bl_machinfo->kick_battery(); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Richard Purdie7875.73%787.50%
Antonino A. Daplas2524.27%112.50%
Total103100.00%8100.00%


static int genericbl_get_intensity(struct backlight_device *bd) { return genericbl_intensity; }

Contributors

PersonTokensPropCommitsCommitProp
Antonino A. Daplas1285.71%150.00%
Richard Purdie214.29%150.00%
Total14100.00%2100.00%

static const struct backlight_ops genericbl_ops = { .options = BL_CORE_SUSPENDRESUME, .get_brightness = genericbl_get_intensity, .update_status = genericbl_send_intensity, };
static int genericbl_probe(struct platform_device *pdev) { struct backlight_properties props; struct generic_bl_info *machinfo = dev_get_platdata(&pdev->dev); const char *name = "generic-bl"; struct backlight_device *bd; bl_machinfo = machinfo; if (!machinfo->limit_mask) machinfo->limit_mask = -1; if (machinfo->name) name = machinfo->name; memset(&props, 0, sizeof(struct backlight_properties)); props.type = BACKLIGHT_RAW; props.max_brightness = machinfo->max_intensity; bd = devm_backlight_device_register(&pdev->dev, name, &pdev->dev, NULL, &genericbl_ops, &props); if (IS_ERR(bd)) return PTR_ERR(bd); platform_set_drvdata(pdev, bd); bd->props.power = FB_BLANK_UNBLANK; bd->props.brightness = machinfo->default_intensity; backlight_update_status(bd); generic_backlight_device = bd; dev_info(&pdev->dev, "Generic Backlight Driver Initialized.\n"); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Richard Purdie9451.37%956.25%
Matthew Garrett3519.13%212.50%
Antonino A. Daplas3418.58%16.25%
Jingoo Han168.74%318.75%
Russell King42.19%16.25%
Total183100.00%16100.00%


static int genericbl_remove(struct platform_device *pdev) { struct backlight_device *bd = platform_get_drvdata(pdev); bd->props.power = 0; bd->props.brightness = 0; backlight_update_status(bd); dev_info(&pdev->dev, "Generic Backlight Driver Unloaded\n"); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Richard Purdie2138.18%342.86%
Antonino A. Daplas1425.45%114.29%
Henrique de Moraes Holschuh1323.64%114.29%
Jingoo Han610.91%114.29%
Russell King11.82%114.29%
Total55100.00%7100.00%

static struct platform_driver genericbl_driver = { .probe = genericbl_probe, .remove = genericbl_remove, .driver = { .name = "generic-bl", }, }; module_platform_driver(genericbl_driver); MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>"); MODULE_DESCRIPTION("Generic Backlight Driver"); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
Richard Purdie23049.15%1147.83%
Antonino A. Daplas15032.05%14.35%
Matthew Garrett357.48%28.70%
Jingoo Han224.70%313.04%
Russell King142.99%28.70%
Henrique de Moraes Holschuh132.78%14.35%
Axel Lin20.43%14.35%
Anton Vorontsov10.21%14.35%
Emese Revfy10.21%14.35%
Total468100.00%23100.00%
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