cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/nouveau/nvkm/subdev/therm/fantog.c

/*
 * Copyright 2012 The Nouveau community
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Martin Peres
 */
#include "priv.h"

#include <subdev/gpio.h>
#include <subdev/timer.h>


struct nvkm_fantog {
	
struct nvkm_fan base;
	
struct nvkm_alarm alarm;
	
spinlock_t lock;
	
u32 period_us;
	
u32 percent;
	
struct dcb_gpio_func func;
};


static void nvkm_fantog_update(struct nvkm_fantog *fan, int percent) { struct nvkm_therm *therm = fan->base.parent; struct nvkm_device *device = therm->subdev.device; struct nvkm_timer *tmr = device->timer; struct nvkm_gpio *gpio = device->gpio; unsigned long flags; int duty; spin_lock_irqsave(&fan->lock, flags); if (percent < 0) percent = fan->percent; fan->percent = percent; duty = !nvkm_gpio_get(gpio, 0, DCB_GPIO_FAN, 0xff); nvkm_gpio_set(gpio, 0, DCB_GPIO_FAN, 0xff, duty); if (list_empty(&fan->alarm.head) && percent != (duty * 100)) { u64 next_change = (percent * fan->period_us) / 100; if (!duty) next_change = fan->period_us - next_change; nvkm_timer_alarm(tmr, next_change * 1000, &fan->alarm); } spin_unlock_irqrestore(&fan->lock, flags); }

Contributors

PersonTokensPropCommitsCommitProp
Martin Peres14878.72%222.22%
Ben Skeggs4021.28%777.78%
Total188100.00%9100.00%


static void nvkm_fantog_alarm(struct nvkm_alarm *alarm) { struct nvkm_fantog *fan = container_of(alarm, struct nvkm_fantog, alarm); nvkm_fantog_update(fan, -1); }

Contributors

PersonTokensPropCommitsCommitProp
Martin Peres2779.41%133.33%
Ben Skeggs720.59%266.67%
Total34100.00%3100.00%


static int nvkm_fantog_get(struct nvkm_therm *therm) { struct nvkm_fantog *fan = (void *)therm->fan; return fan->percent; }

Contributors

PersonTokensPropCommitsCommitProp
Martin Peres2275.86%125.00%
Ben Skeggs724.14%375.00%
Total29100.00%4100.00%


static int nvkm_fantog_set(struct nvkm_therm *therm, int percent) { struct nvkm_fantog *fan = (void *)therm->fan; if (therm->func->pwm_ctrl) therm->func->pwm_ctrl(therm, fan->func.line, false); nvkm_fantog_update(fan, percent); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Martin Peres4877.42%120.00%
Ben Skeggs1320.97%360.00%
Marcin Ślusarz11.61%120.00%
Total62100.00%5100.00%


int nvkm_fantog_create(struct nvkm_therm *therm, struct dcb_gpio_func *func) { struct nvkm_fantog *fan; int ret; if (therm->func->pwm_ctrl) { ret = therm->func->pwm_ctrl(therm, func->line, false); if (ret) return ret; } fan = kzalloc(sizeof(*fan), GFP_KERNEL); therm->fan = &fan->base; if (!fan) return -ENOMEM; fan->base.type = "toggle"; fan->base.get = nvkm_fantog_get; fan->base.set = nvkm_fantog_set; nvkm_alarm_init(&fan->alarm, nvkm_fantog_alarm); fan->period_us = 100000; /* 10Hz */ fan->percent = 100; fan->func = *func; spin_lock_init(&fan->lock); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Martin Peres9461.44%120.00%
Ben Skeggs5938.56%480.00%
Total153100.00%5100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Martin Peres37274.10%218.18%
Ben Skeggs12925.70%872.73%
Marcin Ślusarz10.20%19.09%
Total502100.00%11100.00%
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