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 */
28static struct temp_sensor_registers
29omap34xx_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 */
40static 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 */
48static const int
49omap34xx_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 */
68const 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 */
96static struct temp_sensor_registers
97omap36xx_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 */
108static 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 */
116static const int
117omap36xx_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 */
136const 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};
159

source code of linux/drivers/thermal/ti-soc-thermal/omap3-thermal-data.c