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/*
* arch/arm/mach-tegra/board-roth-fan.c
*
* Copyright (c) 2012-2013 NVIDIA CORPORATION, All rights reserved.
*
* 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.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <linux/gpio.h>
#include <linux/platform_data/pwm_fan.h>
#include <linux/platform_device.h>
#include <mach/gpio-tegra.h>
#include "gpio-names.h"
#include "devices.h"
#include "board.h"
#include "board-common.h"
#include "board-roth.h"
#include "tegra-board-id.h"
static struct pwm_fan_platform_data fan_data_yltc_8k = {
.active_steps = MAX_ACTIVE_STATES,
.active_rpm = {
0, 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000, 11000},
.active_pwm = {0, 158*1024, 227*1024 , 230*1024, 235*1024, 240*1024,
245*1024, 250*1024, 252*1024, 255*1024},
.active_rru = {1024*50, 1024, 1024, 256, 256, 256, 256, 256, 256, 256},
.active_rrd = {1024*50, 1024, 1024, 256, 256, 256, 256, 128, 128, 128},
/*Lookup table to get the actual state cap*/
.state_cap_lookup = {1, 1, 1, 1, 1, 1, 1, 2, 2, 2},
.pwm_period = 256,
.pwm_id = 0,
.step_time = 100, /*msecs*/
.state_cap = 1,
.precision_multiplier = 1024,
.tach_gpio = -1,
};
static struct pwm_fan_platform_data fan_data_delta_6k = {
.active_steps = MAX_ACTIVE_STATES,
.active_rpm = {
0, 1000, 2000, 3000, 4000, 5000, 6000, 7000, 10000, 11000},
.active_pwm = {0, 80*1024, 110*1024 , 150*1024, 235*1024, 240*1024,
245*1024, 250*1024, 252*1024, 255*1024},
.active_rru = {1024*40, 1024*2, 1024, 256,
256, 256, 256, 256, 256, 256},
.active_rrd = {1024*40, 1024*2, 1024, 256, 256,
256, 256, 128, 128, 128},
.state_cap_lookup = {2, 2, 2, 2, 2, 2, 2, 3, 3, 3},
.pwm_period = 256,
.pwm_id = 0,
.step_time = 100, /*msecs*/
.state_cap = 2,
.precision_multiplier = 1024,
.tach_gpio = TEGRA_GPIO_PU2,
};
static struct platform_device pwm_fan_therm_cooling_device_yltc_8k = {
.name = "pwm-fan",
.id = -1,
.num_resources = 0,
.dev = {
.platform_data = &fan_data_yltc_8k,
},
};
static struct platform_device pwm_fan_therm_cooling_device_delta_6k = {
.name = "pwm-fan",
.id = -1,
.num_resources = 0,
.dev = {
.platform_data = &fan_data_delta_6k,
},
};
static struct platform_device *roth_fan_device[] = {
&tegra_pwfm0_device,
};
int __init roth_fan_init(void)
{
int err;
struct board_info board_info;
tegra_get_board_info(&board_info);
err = gpio_request(TEGRA_GPIO_PU3, "pwm-fan");
if (err < 0) {
pr_err("FAN:gpio request failed\n");
return err;
}
gpio_free(TEGRA_GPIO_PU3);
if (board_info.board_id == BOARD_P2560) {
platform_device_register(
&pwm_fan_therm_cooling_device_delta_6k);
pr_info("FAN:registering for P2560\n");
} else {
platform_device_register(&pwm_fan_therm_cooling_device_yltc_8k);
pr_info("FAN:registering for P2454\n");
}
err = platform_add_devices(roth_fan_device,
ARRAY_SIZE(roth_fan_device));
if (err < 0) {
pr_err("FAN:pwm fan device device registration failed\n");
return err;
}
return 0;
}
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