114 lines
3.1 KiB
C
114 lines
3.1 KiB
C
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/*
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* Copyright (c) 2015, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/platform_device.h>
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#include "tsens.h"
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/* eeprom layout data for 8916 */
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#define BASE0_MASK 0x0000007f
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#define BASE1_MASK 0xfe000000
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#define BASE0_SHIFT 0
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#define BASE1_SHIFT 25
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#define S0_P1_MASK 0x00000f80
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#define S1_P1_MASK 0x003e0000
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#define S2_P1_MASK 0xf8000000
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#define S3_P1_MASK 0x000003e0
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#define S4_P1_MASK 0x000f8000
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#define S0_P2_MASK 0x0001f000
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#define S1_P2_MASK 0x07c00000
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#define S2_P2_MASK 0x0000001f
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#define S3_P2_MASK 0x00007c00
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#define S4_P2_MASK 0x01f00000
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#define S0_P1_SHIFT 7
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#define S1_P1_SHIFT 17
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#define S2_P1_SHIFT 27
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#define S3_P1_SHIFT 5
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#define S4_P1_SHIFT 15
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#define S0_P2_SHIFT 12
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#define S1_P2_SHIFT 22
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#define S2_P2_SHIFT 0
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#define S3_P2_SHIFT 10
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#define S4_P2_SHIFT 20
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#define CAL_SEL_MASK 0xe0000000
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#define CAL_SEL_SHIFT 29
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static int calibrate_8916(struct tsens_device *tmdev)
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{
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int base0 = 0, base1 = 0, i;
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u32 p1[5], p2[5];
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int mode = 0;
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u32 *qfprom_cdata, *qfprom_csel;
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qfprom_cdata = (u32 *)qfprom_read(tmdev->dev, "calib");
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if (IS_ERR(qfprom_cdata))
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return PTR_ERR(qfprom_cdata);
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qfprom_csel = (u32 *)qfprom_read(tmdev->dev, "calib_sel");
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if (IS_ERR(qfprom_csel))
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return PTR_ERR(qfprom_csel);
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mode = (qfprom_csel[0] & CAL_SEL_MASK) >> CAL_SEL_SHIFT;
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dev_dbg(tmdev->dev, "calibration mode is %d\n", mode);
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switch (mode) {
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case TWO_PT_CALIB:
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base1 = (qfprom_cdata[1] & BASE1_MASK) >> BASE1_SHIFT;
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p2[0] = (qfprom_cdata[0] & S0_P2_MASK) >> S0_P2_SHIFT;
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p2[1] = (qfprom_cdata[0] & S1_P2_MASK) >> S1_P2_SHIFT;
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p2[2] = (qfprom_cdata[1] & S2_P2_MASK) >> S2_P2_SHIFT;
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p2[3] = (qfprom_cdata[1] & S3_P2_MASK) >> S3_P2_SHIFT;
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p2[4] = (qfprom_cdata[1] & S4_P2_MASK) >> S4_P2_SHIFT;
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for (i = 0; i < tmdev->num_sensors; i++)
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p2[i] = ((base1 + p2[i]) << 3);
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/* Fall through */
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case ONE_PT_CALIB2:
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base0 = (qfprom_cdata[0] & BASE0_MASK);
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p1[0] = (qfprom_cdata[0] & S0_P1_MASK) >> S0_P1_SHIFT;
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p1[1] = (qfprom_cdata[0] & S1_P1_MASK) >> S1_P1_SHIFT;
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p1[2] = (qfprom_cdata[0] & S2_P1_MASK) >> S2_P1_SHIFT;
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p1[3] = (qfprom_cdata[1] & S3_P1_MASK) >> S3_P1_SHIFT;
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p1[4] = (qfprom_cdata[1] & S4_P1_MASK) >> S4_P1_SHIFT;
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for (i = 0; i < tmdev->num_sensors; i++)
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p1[i] = (((base0) + p1[i]) << 3);
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break;
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default:
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for (i = 0; i < tmdev->num_sensors; i++) {
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p1[i] = 500;
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p2[i] = 780;
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}
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break;
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}
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compute_intercept_slope(tmdev, p1, p2, mode);
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return 0;
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}
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static const struct tsens_ops ops_8916 = {
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.init = init_common,
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.calibrate = calibrate_8916,
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.get_temp = get_temp_common,
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};
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const struct tsens_data data_8916 = {
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.num_sensors = 5,
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.ops = &ops_8916,
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.hw_ids = (unsigned int []){0, 1, 2, 4, 5 },
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};
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