drivers/thermal/ti-soc-thermal/omap3-thermal-data.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * OMAP3 thermal driver.
   4  *
   5  * Copyright (C) 2011-2012 Texas Instruments Inc.
   6  * Copyright (C) 2014 Pavel Machek <pavel@ucw.cz>
   7  *
   8  * Note
   9  * http://www.ti.com/lit/er/sprz278f/sprz278f.pdf "Advisory
  10  * 3.1.1.186 MMC OCP Clock Not Gated When Thermal Sensor Is Used"
  11  *
  12  * Also TI says:
  13  * Just be careful when you try to make thermal policy like decisions
  14  * based on this sensor. Placement of the sensor w.r.t the actual logic
  15  * generating heat has to be a factor as well. If you are just looking
  16  * for an approximation temperature (thermometerish kind), you might be
  17  * ok with this. I am not sure we'd find any TI data around this.. just a
  18  * heads up.
  19  */
  20
  21 #include "ti-thermal.h"
  22 #include "ti-bandgap.h"
  23
  24 /*
  25  * OMAP34XX has one instance of thermal sensor for MPU
  26  * need to describe the individual bit fields
  27  */
  28 static struct temp_sensor_registers
  29 omap34xx_mpu_temp_sensor_registers = {
  30         .temp_sensor_ctrl = 0,
  31         .bgap_soc_mask = BIT(8),
  32         .bgap_eocz_mask = BIT(7),
  33         .bgap_dtemp_mask = 0x7f,
  34
  35         .bgap_mode_ctrl = 0,
  36         .mode_ctrl_mask = BIT(9),
  37 };
  38
  39 /* Thresholds and limits for OMAP34XX MPU temperature sensor */
  40 static struct temp_sensor_data omap34xx_mpu_temp_sensor_data = {
  41         .min_freq = 32768,
  42         .max_freq = 32768,
  43 };
  44
  45 /*
  46  * Temperature values in milli degree celsius
  47  */
  48 static const int
  49 omap34xx_adc_to_temp[128] = {
  50         -40000, -40000, -40000, -40000, -40000, -39000, -38000, -36000,
  51         -34000, -32000, -31000, -29000, -28000, -26000, -25000, -24000,
  52         -22000, -21000, -19000, -18000, -17000, -15000, -14000, -12000,
  53         -11000, -9000, -8000, -7000, -5000, -4000, -2000, -1000, 0000,
  54         1000, 3000, 4000, 5000, 7000, 8000, 10000, 11000, 13000, 14000,
  55         15000, 17000, 18000, 20000, 21000, 22000, 24000, 25000, 27000,
  56         28000, 30000, 31000, 32000, 34000, 35000, 37000, 38000, 39000,
  57         41000, 42000, 44000, 45000, 47000, 48000, 49000, 51000, 52000,
  58         53000, 55000, 56000, 58000, 59000, 60000, 62000, 63000, 65000,
  59         66000, 67000, 69000, 70000, 72000, 73000, 74000, 76000, 77000,
  60         79000, 80000, 81000, 83000, 84000, 85000, 87000, 88000, 89000,
  61         91000, 92000, 94000, 95000, 96000, 98000, 99000, 100000,
  62         102000, 103000, 105000, 106000, 107000, 109000, 110000, 111000,
  63         113000, 114000, 116000, 117000, 118000, 120000, 121000, 122000,
  64         124000, 124000, 125000, 125000, 125000, 125000, 125000
  65 };
  66
  67 /* OMAP34XX data */
  68 const struct ti_bandgap_data omap34xx_data = {
  69         .features = TI_BANDGAP_FEATURE_CLK_CTRL | TI_BANDGAP_FEATURE_UNRELIABLE,
  70         .fclock_name = "ts_fck",
  71         .div_ck_name = "ts_fck",
  72         .conv_table = omap34xx_adc_to_temp,
  73         .adc_start_val = 0,
  74         .adc_end_val = 127,
  75         .expose_sensor = ti_thermal_expose_sensor,
  76         .remove_sensor = ti_thermal_remove_sensor,
  77
  78         .sensors = {
  79                 {
  80                 .registers = &omap34xx_mpu_temp_sensor_registers,
  81                 .ts_data = &omap34xx_mpu_temp_sensor_data,
  82                 .domain = "cpu",
  83                 .slope_pcb = 0,
  84                 .constant_pcb = 20000,
  85                 .register_cooling = NULL,
  86                 .unregister_cooling = NULL,
  87                 },
  88         },
  89         .sensor_count = 1,
  90 };
  91
  92 /*
  93  * OMAP36XX has one instance of thermal sensor for MPU
  94  * need to describe the individual bit fields
  95  */
  96 static struct temp_sensor_registers
  97 omap36xx_mpu_temp_sensor_registers = {
  98         .temp_sensor_ctrl = 0,
  99         .bgap_soc_mask = BIT(9),
 100         .bgap_eocz_mask = BIT(8),
 101         .bgap_dtemp_mask = 0xFF,
 102
 103         .bgap_mode_ctrl = 0,
 104         .mode_ctrl_mask = BIT(10),
 105 };
 106
 107 /* Thresholds and limits for OMAP36XX MPU temperature sensor */
 108 static struct temp_sensor_data omap36xx_mpu_temp_sensor_data = {
 109         .min_freq = 32768,
 110         .max_freq = 32768,
 111 };
 112
 113 /*
 114  * Temperature values in milli degree celsius
 115  */
 116 static const int
 117 omap36xx_adc_to_temp[128] = {
 118         -40000, -40000, -40000, -40000, -40000, -40000, -40000, -40000,
 119         -40000, -40000, -40000, -40000, -40000, -38000, -35000, -34000,
 120         -32000, -30000, -28000, -26000, -24000, -22000, -20000, -18500,
 121         -17000, -15000, -13500, -12000, -10000, -8000, -6500, -5000, -3500,
 122         -1500, 0, 2000, 3500, 5000, 6500, 8500, 10000, 12000, 13500,
 123         15000, 17000, 19000, 21000, 23000, 25000, 27000, 28500, 30000,
 124         32000, 33500, 35000, 37000, 38500, 40000, 42000, 43500, 45000,
 125         47000, 48500, 50000, 52000, 53500, 55000, 57000, 58500, 60000,
 126         62000, 64000, 66000, 68000, 70000, 71500, 73500, 75000, 77000,
 127         78500, 80000, 82000, 83500, 85000, 87000, 88500, 90000, 92000,
 128         93500, 95000, 97000, 98500, 100000, 102000, 103500, 105000, 107000,
 129         109000, 111000, 113000, 115000, 117000, 118500, 120000, 122000,
 130         123500, 125000, 125000, 125000, 125000, 125000, 125000, 125000,
 131         125000, 125000, 125000, 125000, 125000, 125000, 125000, 125000,
 132         125000, 125000, 125000, 125000, 125000, 125000, 125000
 133 };
 134
 135 /* OMAP36XX data */
 136 const struct ti_bandgap_data omap36xx_data = {
 137         .features = TI_BANDGAP_FEATURE_CLK_CTRL | TI_BANDGAP_FEATURE_UNRELIABLE,
 138         .fclock_name = "ts_fck",
 139         .div_ck_name = "ts_fck",
 140         .conv_table = omap36xx_adc_to_temp,
 141         .adc_start_val = 0,
 142         .adc_end_val = 127,
 143         .expose_sensor = ti_thermal_expose_sensor,
 144         .remove_sensor = ti_thermal_remove_sensor,
 145
 146         .sensors = {
 147                 {
 148                 .registers = &omap36xx_mpu_temp_sensor_registers,
 149                 .ts_data = &omap36xx_mpu_temp_sensor_data,
 150                 .domain = "cpu",
 151                 .slope_pcb = 0,
 152                 .constant_pcb = 20000,
 153                 .register_cooling = NULL,
 154                 .unregister_cooling = NULL,
 155                 },
 156         },
 157         .sensor_count = 1,
 158 };