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

/*
 * Copyright 2012 Red Hat Inc.
 *
 * 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: Ben Skeggs
 *          Martin Peres
 */
#include "priv.h"

#include <core/option.h>
#include <subdev/bios.h>
#include <subdev/bios/fan.h>
#include <subdev/gpio.h>


struct nvkm_fanpwm {
	
struct nvkm_fan base;
	
struct dcb_gpio_func func;
};


static int nvkm_fanpwm_get(struct nvkm_therm *therm) { struct nvkm_fanpwm *fan = (void *)therm->fan; struct nvkm_device *device = therm->subdev.device; struct nvkm_gpio *gpio = device->gpio; int card_type = device->card_type; u32 divs, duty; int ret; ret = therm->func->pwm_get(therm, fan->func.line, &divs, &duty); if (ret == 0 && divs) { divs = max(divs, duty); if (card_type <= NV_40 || (fan->func.log[0] & 1)) duty = divs - duty; return (duty * 100) / divs; } return nvkm_gpio_get(gpio, 0, fan->func.func, fan->func.line) * 100; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs157100.00%5100.00%
Total157100.00%5100.00%


static int nvkm_fanpwm_set(struct nvkm_therm *therm, int percent) { struct nvkm_fanpwm *fan = (void *)therm->fan; int card_type = therm->subdev.device->card_type; u32 divs, duty; int ret; divs = fan->base.perf.pwm_divisor; if (fan->base.bios.pwm_freq) { divs = 1; if (therm->func->pwm_clock) divs = therm->func->pwm_clock(therm, fan->func.line); divs /= fan->base.bios.pwm_freq; } duty = ((divs * percent) + 99) / 100; if (card_type <= NV_40 || (fan->func.log[0] & 1)) duty = divs - duty; ret = therm->func->pwm_set(therm, fan->func.line, divs, duty); if (ret == 0) ret = therm->func->pwm_ctrl(therm, fan->func.line, true); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs19097.44%480.00%
Martin Peres52.56%120.00%
Total195100.00%5100.00%


int nvkm_fanpwm_create(struct nvkm_therm *therm, struct dcb_gpio_func *func) { struct nvkm_device *device = therm->subdev.device; struct nvkm_bios *bios = device->bios; struct nvkm_fanpwm *fan; struct nvbios_therm_fan info = {}; u32 divs, duty; nvbios_fan_parse(bios, &info); if (!nvkm_boolopt(device->cfgopt, "NvFanPWM", func->param) || !therm->func->pwm_ctrl || info.type == NVBIOS_THERM_FAN_TOGGLE || therm->func->pwm_get(therm, func->line, &divs, &duty) == -ENODEV) return -ENODEV; fan = kzalloc(sizeof(*fan), GFP_KERNEL); therm->fan = &fan->base; if (!fan) return -ENOMEM; fan->base.type = "PWM"; fan->base.get = nvkm_fanpwm_get; fan->base.set = nvkm_fanpwm_set; fan->func = *func; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs15988.83%583.33%
Martin Peres2011.17%116.67%
Total179100.00%6100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs52994.46%675.00%
Martin Peres315.54%225.00%
Total560100.00%8100.00%
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