drivers/thermal/qcom/tsens-8916.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2015, The Linux Foundation. All rights reserved.
   4  */
   5
   6 #include <linux/platform_device.h>
   7 #include "tsens.h"
   8
   9 /* eeprom layout data for 8916 */
  10 #define BASE0_MASK      0x0000007f
  11 #define BASE1_MASK      0xfe000000
  12 #define BASE0_SHIFT     0
  13 #define BASE1_SHIFT     25
  14
  15 #define S0_P1_MASK      0x00000f80
  16 #define S1_P1_MASK      0x003e0000
  17 #define S2_P1_MASK      0xf8000000
  18 #define S3_P1_MASK      0x000003e0
  19 #define S4_P1_MASK      0x000f8000
  20
  21 #define S0_P2_MASK      0x0001f000
  22 #define S1_P2_MASK      0x07c00000
  23 #define S2_P2_MASK      0x0000001f
  24 #define S3_P2_MASK      0x00007c00
  25 #define S4_P2_MASK      0x01f00000
  26
  27 #define S0_P1_SHIFT     7
  28 #define S1_P1_SHIFT     17
  29 #define S2_P1_SHIFT     27
  30 #define S3_P1_SHIFT     5
  31 #define S4_P1_SHIFT     15
  32
  33 #define S0_P2_SHIFT     12
  34 #define S1_P2_SHIFT     22
  35 #define S2_P2_SHIFT     0
  36 #define S3_P2_SHIFT     10
  37 #define S4_P2_SHIFT     20
  38
  39 #define CAL_SEL_MASK    0xe0000000
  40 #define CAL_SEL_SHIFT   29
  41
  42 static int calibrate_8916(struct tsens_device *tmdev)
  43 {
  44         int base0 = 0, base1 = 0, i;
  45         u32 p1[5], p2[5];
  46         int mode = 0;
  47         u32 *qfprom_cdata, *qfprom_csel;
  48
  49         qfprom_cdata = (u32 *)qfprom_read(tmdev->dev, "calib");
  50         if (IS_ERR(qfprom_cdata))
  51                 return PTR_ERR(qfprom_cdata);
  52
  53         qfprom_csel = (u32 *)qfprom_read(tmdev->dev, "calib_sel");
  54         if (IS_ERR(qfprom_csel))
  55                 return PTR_ERR(qfprom_csel);
  56
  57         mode = (qfprom_csel[0] & CAL_SEL_MASK) >> CAL_SEL_SHIFT;
  58         dev_dbg(tmdev->dev, "calibration mode is %d\n", mode);
  59
  60         switch (mode) {
  61         case TWO_PT_CALIB:
  62                 base1 = (qfprom_cdata[1] & BASE1_MASK) >> BASE1_SHIFT;
  63                 p2[0] = (qfprom_cdata[0] & S0_P2_MASK) >> S0_P2_SHIFT;
  64                 p2[1] = (qfprom_cdata[0] & S1_P2_MASK) >> S1_P2_SHIFT;
  65                 p2[2] = (qfprom_cdata[1] & S2_P2_MASK) >> S2_P2_SHIFT;
  66                 p2[3] = (qfprom_cdata[1] & S3_P2_MASK) >> S3_P2_SHIFT;
  67                 p2[4] = (qfprom_cdata[1] & S4_P2_MASK) >> S4_P2_SHIFT;
  68                 for (i = 0; i < tmdev->num_sensors; i++)
  69                         p2[i] = ((base1 + p2[i]) << 3);
  70                 /* Fall through */
  71         case ONE_PT_CALIB2:
  72                 base0 = (qfprom_cdata[0] & BASE0_MASK);
  73                 p1[0] = (qfprom_cdata[0] & S0_P1_MASK) >> S0_P1_SHIFT;
  74                 p1[1] = (qfprom_cdata[0] & S1_P1_MASK) >> S1_P1_SHIFT;
  75                 p1[2] = (qfprom_cdata[0] & S2_P1_MASK) >> S2_P1_SHIFT;
  76                 p1[3] = (qfprom_cdata[1] & S3_P1_MASK) >> S3_P1_SHIFT;
  77                 p1[4] = (qfprom_cdata[1] & S4_P1_MASK) >> S4_P1_SHIFT;
  78                 for (i = 0; i < tmdev->num_sensors; i++)
  79                         p1[i] = (((base0) + p1[i]) << 3);
  80                 break;
  81         default:
  82                 for (i = 0; i < tmdev->num_sensors; i++) {
  83                         p1[i] = 500;
  84                         p2[i] = 780;
  85                 }
  86                 break;
  87         }
  88
  89         compute_intercept_slope(tmdev, p1, p2, mode);
  90
  91         return 0;
  92 }
  93
  94 static const struct tsens_ops ops_8916 = {
  95         .init           = init_common,
  96         .calibrate      = calibrate_8916,
  97         .get_temp       = get_temp_common,
  98 };
  99
 100 const struct tsens_data data_8916 = {
 101         .num_sensors    = 5,
 102         .ops            = &ops_8916,
 103         .reg_offsets    = { [SROT_CTRL_OFFSET] = 0x0 },
 104         .hw_ids         = (unsigned int []){0, 1, 2, 4, 5 },
 105 };