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

   1 /*
   2  * OMAP3 thermal driver.
   3  *
   4  * Copyright (C) 2011-2012 Texas Instruments Inc.
   5  * Copyright (C) 2014 Pavel Machek <pavel@ucw.cz>
   6  *
   7  * This software is licensed under the terms of the GNU General Public
   8  * License version 2, as published by the Free Software Foundation, and
   9  * may be copied, distributed, and modified under those terms.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU General Public License for more details.
  15  *
  16  * Note
  17  * http://www.ti.com/lit/er/sprz278f/sprz278f.pdf "Advisory
  18  * 3.1.1.186 MMC OCP Clock Not Gated When Thermal Sensor Is Used"
  19  *
  20  * Also TI says:
  21  * Just be careful when you try to make thermal policy like decisions
  22  * based on this sensor. Placement of the sensor w.r.t the actual logic
  23  * generating heat has to be a factor as well. If you are just looking
  24  * for an approximation temperature (thermometerish kind), you might be
  25  * ok with this. I am not sure we'd find any TI data around this.. just a
  26  * heads up.
  27  */
  28
  29 #include "ti-thermal.h"
  30 #include "ti-bandgap.h"
  31
  32 /*
  33  * OMAP34XX has one instance of thermal sensor for MPU
  34  * need to describe the individual bit fields
  35  */
  36 static struct temp_sensor_registers
  37 omap34xx_mpu_temp_sensor_registers = {
  38         .temp_sensor_ctrl = 0,
  39         .bgap_soc_mask = BIT(8),
  40         .bgap_eocz_mask = BIT(7),
  41         .bgap_dtemp_mask = 0x7f,
  42
  43         .bgap_mode_ctrl = 0,
  44         .mode_ctrl_mask = BIT(9),
  45 };
  46
  47 /* Thresholds and limits for OMAP34XX MPU temperature sensor */
  48 static struct temp_sensor_data omap34xx_mpu_temp_sensor_data = {
  49         .min_freq = 32768,
  50         .max_freq = 32768,
  51         .max_temp = 125000,
  52         .min_temp = -40000,
  53         .hyst_val = 5000,
  54 };
  55
  56 /*
  57  * Temperature values in milli degree celsius
  58  */
  59 static const int
  60 omap34xx_adc_to_temp[128] = {
  61         -40000, -40000, -40000, -40000, -40000, -39000, -38000, -36000,
  62         -34000, -32000, -31000, -29000, -28000, -26000, -25000, -24000,
  63         -22000, -21000, -19000, -18000, -17000, -15000, -14000, -12000,
  64         -11000, -9000, -8000, -7000, -5000, -4000, -2000, -1000, 0000,
  65         1000, 3000, 4000, 5000, 7000, 8000, 10000, 11000, 13000, 14000,
  66         15000, 17000, 18000, 20000, 21000, 22000, 24000, 25000, 27000,
  67         28000, 30000, 31000, 32000, 34000, 35000, 37000, 38000, 39000,
  68         41000, 42000, 44000, 45000, 47000, 48000, 49000, 51000, 52000,
  69         53000, 55000, 56000, 58000, 59000, 60000, 62000, 63000, 65000,
  70         66000, 67000, 69000, 70000, 72000, 73000, 74000, 76000, 77000,
  71         79000, 80000, 81000, 83000, 84000, 85000, 87000, 88000, 89000,
  72         91000, 92000, 94000, 95000, 96000, 98000, 99000, 100000,
  73         102000, 103000, 105000, 106000, 107000, 109000, 110000, 111000,
  74         113000, 114000, 116000, 117000, 118000, 120000, 121000, 122000,
  75         124000, 124000, 125000, 125000, 125000, 125000, 125000
  76 };
  77
  78 /* OMAP34XX data */
  79 const struct ti_bandgap_data omap34xx_data = {
  80         .features = TI_BANDGAP_FEATURE_CLK_CTRL | TI_BANDGAP_FEATURE_UNRELIABLE,
  81         .fclock_name = "ts_fck",
  82         .div_ck_name = "ts_fck",
  83         .conv_table = omap34xx_adc_to_temp,
  84         .adc_start_val = 0,
  85         .adc_end_val = 127,
  86         .expose_sensor = ti_thermal_expose_sensor,
  87         .remove_sensor = ti_thermal_remove_sensor,
  88
  89         .sensors = {
  90                 {
  91                 .registers = &omap34xx_mpu_temp_sensor_registers,
  92                 .ts_data = &omap34xx_mpu_temp_sensor_data,
  93                 .domain = "cpu",
  94                 .slope = 0,
  95                 .constant = 20000,
  96                 .slope_pcb = 0,
  97                 .constant_pcb = 20000,
  98                 .register_cooling = NULL,
  99                 .unregister_cooling = NULL,
 100                 },
 101         },
 102         .sensor_count = 1,
 103 };
 104
 105 /*
 106  * OMAP36XX has one instance of thermal sensor for MPU
 107  * need to describe the individual bit fields
 108  */
 109 static struct temp_sensor_registers
 110 omap36xx_mpu_temp_sensor_registers = {
 111         .temp_sensor_ctrl = 0,
 112         .bgap_soc_mask = BIT(9),
 113         .bgap_eocz_mask = BIT(8),
 114         .bgap_dtemp_mask = 0xFF,
 115
 116         .bgap_mode_ctrl = 0,
 117         .mode_ctrl_mask = BIT(10),
 118 };
 119
 120 /* Thresholds and limits for OMAP36XX MPU temperature sensor */
 121 static struct temp_sensor_data omap36xx_mpu_temp_sensor_data = {
 122         .min_freq = 32768,
 123         .max_freq = 32768,
 124         .max_temp = 125000,
 125         .min_temp = -40000,
 126         .hyst_val = 5000,
 127 };
 128
 129 /*
 130  * Temperature values in milli degree celsius
 131  */
 132 static const int
 133 omap36xx_adc_to_temp[128] = {
 134         -40000, -40000, -40000, -40000, -40000, -40000, -40000, -40000,
 135         -40000, -40000, -40000, -40000, -40000, -38000, -35000, -34000,
 136         -32000, -30000, -28000, -26000, -24000, -22000, -20000, -18500,
 137         -17000, -15000, -13500, -12000, -10000, -8000, -6500, -5000, -3500,
 138         -1500, 0, 2000, 3500, 5000, 6500, 8500, 10000, 12000, 13500,
 139         15000, 17000, 19000, 21000, 23000, 25000, 27000, 28500, 30000,
 140         32000, 33500, 35000, 37000, 38500, 40000, 42000, 43500, 45000,
 141         47000, 48500, 50000, 52000, 53500, 55000, 57000, 58500, 60000,
 142         62000, 64000, 66000, 68000, 70000, 71500, 73500, 75000, 77000,
 143         78500, 80000, 82000, 83500, 85000, 87000, 88500, 90000, 92000,
 144         93500, 95000, 97000, 98500, 100000, 102000, 103500, 105000, 107000,
 145         109000, 111000, 113000, 115000, 117000, 118500, 120000, 122000,
 146         123500, 125000, 125000, 125000, 125000, 125000, 125000, 125000,
 147         125000, 125000, 125000, 125000, 125000, 125000, 125000, 125000,
 148         125000, 125000, 125000, 125000, 125000, 125000, 125000
 149 };
 150
 151 /* OMAP36XX data */
 152 const struct ti_bandgap_data omap36xx_data = {
 153         .features = TI_BANDGAP_FEATURE_CLK_CTRL | TI_BANDGAP_FEATURE_UNRELIABLE,
 154         .fclock_name = "ts_fck",
 155         .div_ck_name = "ts_fck",
 156         .conv_table = omap36xx_adc_to_temp,
 157         .adc_start_val = 0,
 158         .adc_end_val = 127,
 159         .expose_sensor = ti_thermal_expose_sensor,
 160         .remove_sensor = ti_thermal_remove_sensor,
 161
 162         .sensors = {
 163                 {
 164                 .registers = &omap36xx_mpu_temp_sensor_registers,
 165                 .ts_data = &omap36xx_mpu_temp_sensor_data,
 166                 .domain = "cpu",
 167                 .slope = 0,
 168                 .constant = 20000,
 169                 .slope_pcb = 0,
 170                 .constant_pcb = 20000,
 171                 .register_cooling = NULL,
 172                 .unregister_cooling = NULL,
 173                 },
 174         },
 175         .sensor_count = 1,
 176 };