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/*
* arch/arm/mach-tegra/board-loki-fan.c
*
* Copyright (c) 2013-2014 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-loki.h"
#include "tegra-board-id.h"
static int active_pwm_loki[MAX_ACTIVE_STATES] = {
0, 80*1024, 110*1024 , 150*1024, 200*1024, 240*1024,
245*1024, 250*1024, 252*1024, 255*1024};
static int active_pwm_foster[MAX_ACTIVE_STATES] = {
0, 70*1024, 115*1024 , 135*1024, 135*1024, 240*1024,
245*1024, 250*1024, 252*1024, 255*1024};
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_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, 3, 3, 3, 4, 4, 4},
.pwm_period = 256,
.pwm_id = 0,
.step_time = 100, /*msecs*/
.state_cap = 7,
.precision_multiplier = 1024,
.tach_gpio = TEGRA_GPIO_PU2,
.pwm_gpio = TEGRA_GPIO_PU3,
};
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,
},
};
int __init loki_fan_init(void)
{
int err;
struct board_info board_info;
tegra_get_board_info(&board_info);
if ((board_info.sku == BOARD_SKU_FOSTER) &&
(board_info.board_id == BOARD_P2530)) {
memcpy((&fan_data_delta_6k)->active_pwm, &active_pwm_foster,
sizeof(active_pwm_foster));
} else {
memcpy((&fan_data_delta_6k)->active_pwm, &active_pwm_loki,
sizeof(active_pwm_loki));
}
err = gpio_request(TEGRA_GPIO_PU3, "pwm-fan");
if (err < 0) {
pr_err("FAN:gpio request failed\n");
return err;
}
platform_device_register(
&pwm_fan_therm_cooling_device_delta_6k);
pr_info("Registering Fan!\n");
return 0;
}
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