target/linux/ipq806x/patches-4.4/015-2-thermal-qcom-tsens-8916-Add-support-for-8916-family-of-SoCs.patch

   1 From 840a5bd3ed3fdd62456d4d26c3128ec10496555b Mon Sep 17 00:00:00 2001
   2 From: Rajendra Nayak <rnayak@codeaurora.org>
   3 Date: Thu, 5 May 2016 14:21:40 +0530
   4 Subject: thermal: qcom: tsens-8916: Add support for 8916 family of SoCs
   5
   6 Add support to calibrate sensors on 8916 family and also add common
   7 functions to read temperature from sensors (This can be reused on
   8 other SoCs having similar TSENS device)
   9 The calibration data is read from eeprom using the generic nvmem
  10 framework apis.
  11
  12 Based on the original code by Siddartha Mohanadoss and Stephen Boyd.
  13
  14 Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
  15 Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
  16 Signed-off-by: Zhang Rui <rui.zhang@intel.com>
  17 ---
  18  drivers/thermal/qcom/Makefile     |   2 +-
  19  drivers/thermal/qcom/tsens-8916.c | 113 ++++++++++++++++++++++++++++++++++++++
  20  drivers/thermal/qcom/tsens.c      |   1 +
  21  drivers/thermal/qcom/tsens.h      |   2 +
  22  4 files changed, 117 insertions(+), 1 deletion(-)
  23  create mode 100644 drivers/thermal/qcom/tsens-8916.c
  24
  25 --- a/drivers/thermal/qcom/Makefile
  26 +++ b/drivers/thermal/qcom/Makefile
  27 @@ -1,2 +1,2 @@
  28  obj-$(CONFIG_QCOM_TSENS)       += qcom_tsens.o
  29 -qcom_tsens-y                   += tsens.o tsens-common.o
  30 +qcom_tsens-y                   += tsens.o tsens-common.o tsens-8916.o
  31 --- /dev/null
  32 +++ b/drivers/thermal/qcom/tsens-8916.c
  33 @@ -0,0 +1,113 @@
  34 +/*
  35 + * Copyright (c) 2015, The Linux Foundation. All rights reserved.
  36 + *
  37 + * This program is free software; you can redistribute it and/or modify
  38 + * it under the terms of the GNU General Public License version 2 and
  39 + * only version 2 as published by the Free Software Foundation.
  40 + *
  41 + * This program is distributed in the hope that it will be useful,
  42 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
  43 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  44 + * GNU General Public License for more details.
  45 + *
  46 + */
  47 +
  48 +#include <linux/platform_device.h>
  49 +#include "tsens.h"
  50 +
  51 +/* eeprom layout data for 8916 */
  52 +#define BASE0_MASK     0x0000007f
  53 +#define BASE1_MASK     0xfe000000
  54 +#define BASE0_SHIFT    0
  55 +#define BASE1_SHIFT    25
  56 +
  57 +#define S0_P1_MASK     0x00000f80
  58 +#define S1_P1_MASK     0x003e0000
  59 +#define S2_P1_MASK     0xf8000000
  60 +#define S3_P1_MASK     0x000003e0
  61 +#define S4_P1_MASK     0x000f8000
  62 +
  63 +#define S0_P2_MASK     0x0001f000
  64 +#define S1_P2_MASK     0x07c00000
  65 +#define S2_P2_MASK     0x0000001f
  66 +#define S3_P2_MASK     0x00007c00
  67 +#define S4_P2_MASK     0x01f00000
  68 +
  69 +#define S0_P1_SHIFT    7
  70 +#define S1_P1_SHIFT    17
  71 +#define S2_P1_SHIFT    27
  72 +#define S3_P1_SHIFT    5
  73 +#define S4_P1_SHIFT    15
  74 +
  75 +#define S0_P2_SHIFT    12
  76 +#define S1_P2_SHIFT    22
  77 +#define S2_P2_SHIFT    0
  78 +#define S3_P2_SHIFT    10
  79 +#define S4_P2_SHIFT    20
  80 +
  81 +#define CAL_SEL_MASK   0xe0000000
  82 +#define CAL_SEL_SHIFT  29
  83 +
  84 +static int calibrate_8916(struct tsens_device *tmdev)
  85 +{
  86 +       int base0 = 0, base1 = 0, i;
  87 +       u32 p1[5], p2[5];
  88 +       int mode = 0;
  89 +       u32 *qfprom_cdata, *qfprom_csel;
  90 +
  91 +       qfprom_cdata = (u32 *)qfprom_read(tmdev->dev, "calib");
  92 +       if (IS_ERR(qfprom_cdata))
  93 +               return PTR_ERR(qfprom_cdata);
  94 +
  95 +       qfprom_csel = (u32 *)qfprom_read(tmdev->dev, "calib_sel");
  96 +       if (IS_ERR(qfprom_csel))
  97 +               return PTR_ERR(qfprom_csel);
  98 +
  99 +       mode = (qfprom_csel[0] & CAL_SEL_MASK) >> CAL_SEL_SHIFT;
 100 +       dev_dbg(tmdev->dev, "calibration mode is %d\n", mode);
 101 +
 102 +       switch (mode) {
 103 +       case TWO_PT_CALIB:
 104 +               base1 = (qfprom_cdata[1] & BASE1_MASK) >> BASE1_SHIFT;
 105 +               p2[0] = (qfprom_cdata[0] & S0_P2_MASK) >> S0_P2_SHIFT;
 106 +               p2[1] = (qfprom_cdata[0] & S1_P2_MASK) >> S1_P2_SHIFT;
 107 +               p2[2] = (qfprom_cdata[1] & S2_P2_MASK) >> S2_P2_SHIFT;
 108 +               p2[3] = (qfprom_cdata[1] & S3_P2_MASK) >> S3_P2_SHIFT;
 109 +               p2[4] = (qfprom_cdata[1] & S4_P2_MASK) >> S4_P2_SHIFT;
 110 +               for (i = 0; i < tmdev->num_sensors; i++)
 111 +                       p2[i] = ((base1 + p2[i]) << 3);
 112 +               /* Fall through */
 113 +       case ONE_PT_CALIB2:
 114 +               base0 = (qfprom_cdata[0] & BASE0_MASK);
 115 +               p1[0] = (qfprom_cdata[0] & S0_P1_MASK) >> S0_P1_SHIFT;
 116 +               p1[1] = (qfprom_cdata[0] & S1_P1_MASK) >> S1_P1_SHIFT;
 117 +               p1[2] = (qfprom_cdata[0] & S2_P1_MASK) >> S2_P1_SHIFT;
 118 +               p1[3] = (qfprom_cdata[1] & S3_P1_MASK) >> S3_P1_SHIFT;
 119 +               p1[4] = (qfprom_cdata[1] & S4_P1_MASK) >> S4_P1_SHIFT;
 120 +               for (i = 0; i < tmdev->num_sensors; i++)
 121 +                       p1[i] = (((base0) + p1[i]) << 3);
 122 +               break;
 123 +       default:
 124 +               for (i = 0; i < tmdev->num_sensors; i++) {
 125 +                       p1[i] = 500;
 126 +                       p2[i] = 780;
 127 +               }
 128 +               break;
 129 +       }
 130 +
 131 +       compute_intercept_slope(tmdev, p1, p2, mode);
 132 +
 133 +       return 0;
 134 +}
 135 +
 136 +const struct tsens_ops ops_8916 = {
 137 +       .init           = init_common,
 138 +       .calibrate      = calibrate_8916,
 139 +       .get_temp       = get_temp_common,
 140 +};
 141 +
 142 +const struct tsens_data data_8916 = {
 143 +       .num_sensors    = 5,
 144 +       .ops            = &ops_8916,
 145 +       .hw_ids         = (unsigned int []){0, 1, 2, 4, 5 },
 146 +};
 147 --- a/drivers/thermal/qcom/tsens.c
 148 +++ b/drivers/thermal/qcom/tsens.c
 149 @@ -65,6 +65,7 @@ static SIMPLE_DEV_PM_OPS(tsens_pm_ops, t
 150  static const struct of_device_id tsens_table[] = {
 151         {
 152                 .compatible = "qcom,msm8916-tsens",
 153 +               .data = &data_8916,
 154         }, {
 155                 .compatible = "qcom,msm8974-tsens",
 156         },
 157 --- a/drivers/thermal/qcom/tsens.h
 158 +++ b/drivers/thermal/qcom/tsens.h
 159 @@ -87,4 +87,6 @@ void compute_intercept_slope(struct tsen
 160  int init_common(struct tsens_device *);
 161  int get_temp_common(struct tsens_device *, int, int *);
 162
 163 +extern const struct tsens_data data_8916;
 164 +
 165  #endif /* __QCOM_TSENS_H__ */