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/*
* Copyright (c) 2015, The Linux Foundation. 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 and
* only 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.
*
*/
#include <linux/platform_device.h>
#include "tsens.h"
/* eeprom layout data for 8916 */
#define BASE0_MASK 0x0000007f
#define BASE1_MASK 0xfe000000
#define BASE0_SHIFT 0
#define BASE1_SHIFT 25
#define S0_P1_MASK 0x00000f80
#define S1_P1_MASK 0x003e0000
#define S2_P1_MASK 0xf8000000
#define S3_P1_MASK 0x000003e0
#define S4_P1_MASK 0x000f8000
#define S0_P2_MASK 0x0001f000
#define S1_P2_MASK 0x07c00000
#define S2_P2_MASK 0x0000001f
#define S3_P2_MASK 0x00007c00
#define S4_P2_MASK 0x01f00000
#define S0_P1_SHIFT 7
#define S1_P1_SHIFT 17
#define S2_P1_SHIFT 27
#define S3_P1_SHIFT 5
#define S4_P1_SHIFT 15
#define S0_P2_SHIFT 12
#define S1_P2_SHIFT 22
#define S2_P2_SHIFT 0
#define S3_P2_SHIFT 10
#define S4_P2_SHIFT 20
#define CAL_SEL_MASK 0xe0000000
#define CAL_SEL_SHIFT 29
static int calibrate_8916(struct tsens_device *tmdev)
{
int base0 = 0, base1 = 0, i;
u32 p1[5], p2[5];
int mode = 0;
u32 *qfprom_cdata, *qfprom_csel;
qfprom_cdata = (u32 *)qfprom_read(tmdev->dev, "calib");
if (IS_ERR(qfprom_cdata))
return PTR_ERR(qfprom_cdata);
qfprom_csel = (u32 *)qfprom_read(tmdev->dev, "calib_sel");
if (IS_ERR(qfprom_csel))
return PTR_ERR(qfprom_csel);
mode = (qfprom_csel[0] & CAL_SEL_MASK) >> CAL_SEL_SHIFT;
dev_dbg(tmdev->dev, "calibration mode is %d\n", mode);
switch (mode) {
case TWO_PT_CALIB:
base1 = (qfprom_cdata[1] & BASE1_MASK) >> BASE1_SHIFT;
p2[0] = (qfprom_cdata[0] & S0_P2_MASK) >> S0_P2_SHIFT;
p2[1] = (qfprom_cdata[0] & S1_P2_MASK) >> S1_P2_SHIFT;
p2[2] = (qfprom_cdata[1] & S2_P2_MASK) >> S2_P2_SHIFT;
p2[3] = (qfprom_cdata[1] & S3_P2_MASK) >> S3_P2_SHIFT;
p2[4] = (qfprom_cdata[1] & S4_P2_MASK) >> S4_P2_SHIFT;
for (i = 0; i < tmdev->num_sensors; i++)
p2[i] = ((base1 + p2[i]) << 3);
/* Fall through */
case ONE_PT_CALIB2:
base0 = (qfprom_cdata[0] & BASE0_MASK);
p1[0] = (qfprom_cdata[0] & S0_P1_MASK) >> S0_P1_SHIFT;
p1[1] = (qfprom_cdata[0] & S1_P1_MASK) >> S1_P1_SHIFT;
p1[2] = (qfprom_cdata[0] & S2_P1_MASK) >> S2_P1_SHIFT;
p1[3] = (qfprom_cdata[1] & S3_P1_MASK) >> S3_P1_SHIFT;
p1[4] = (qfprom_cdata[1] & S4_P1_MASK) >> S4_P1_SHIFT;
for (i = 0; i < tmdev->num_sensors; i++)
p1[i] = (((base0) + p1[i]) << 3);
break;
default:
for (i = 0; i < tmdev->num_sensors; i++) {
p1[i] = 500;
p2[i] = 780;
}
break;
}
compute_intercept_slope(tmdev, p1, p2, mode);
return 0;
}
static const struct tsens_ops ops_8916 = {
.init = init_common,
.calibrate = calibrate_8916,
.get_temp = get_temp_common,
};
const struct tsens_data data_8916 = {
.num_sensors = 5,
.ops = &ops_8916,
.hw_ids = (unsigned int []){0, 1, 2, 4, 5 },
};
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