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/*
* arch/arm/mach-tegra/tegra3_tsensor.c
*
* Copyright (C) 2011 NVIDIA Corporation.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include "board.h"
#ifdef CONFIG_SENSORS_TEGRA_TSENSOR
#include <mach/tsensor.h>
#include <devices.h>
#include "fuse.h"
static struct tegra_tsensor_platform_data tsensor_data = {
.hysteresis = 5,
.sw_intr_temperature = 75,
.hw_clk_div_temperature = 80,
.hw_reset_temperature = 90,
};
/* fuse revision constants used for tsensor */
#define FUSE_TEST_PROGRAM_REVISION_0 0x128
#define TSENSOR_FUSE_REVISION_DECIMAL 8
#define TSENSOR_FUSE_REVISION_INTEGER 0
void __init tegra_tsensor_init(void)
{
unsigned int reg, fuse_rev_integer, fuse_rev_decimal;
/* tsensor driver is instantiated based on fuse revision */
reg = tegra_fuse_readl(FUSE_TEST_PROGRAM_REVISION_0);
fuse_rev_decimal = (reg & 0xf);
fuse_rev_integer = ((reg >> 4) & 0x7);
pr_info("\nTegra3 fuse revision %d.%d ", fuse_rev_integer,
fuse_rev_decimal);
if ((fuse_rev_decimal >= TSENSOR_FUSE_REVISION_DECIMAL) &&
(fuse_rev_integer >= TSENSOR_FUSE_REVISION_INTEGER)) {
/* set platform data for device before register */
tegra_tsensor_device.dev.platform_data = &tsensor_data;
platform_device_register(&tegra_tsensor_device);
}
}
#else
void __init tegra_tsensor_init(void) { }
#endif
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