2 * OMAP3 thermal driver.
4 * Copyright (C) 2011-2012 Texas Instruments Inc.
5 * Copyright (C) 2014 Pavel Machek <pavel@ucw.cz>
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.
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.
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"
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
29 #include "ti-thermal.h"
30 #include "ti-bandgap.h"
33 * OMAP34XX has one instance of thermal sensor for MPU
34 * need to describe the individual bit fields
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,
44 .mode_ctrl_mask = BIT(9),
47 /* Thresholds and limits for OMAP34XX MPU temperature sensor */
48 static struct temp_sensor_data omap34xx_mpu_temp_sensor_data = {
57 * Temperature values in milli degree celsius
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
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,
86 .expose_sensor = ti_thermal_expose_sensor,
87 .remove_sensor = ti_thermal_remove_sensor,
91 .registers = &omap34xx_mpu_temp_sensor_registers,
92 .ts_data = &omap34xx_mpu_temp_sensor_data,
97 .constant_pcb = 20000,
98 .register_cooling = NULL,
99 .unregister_cooling = NULL,