/* * OMAP3 thermal driver. * * Copyright (C) 2011-2012 Texas Instruments Inc. * Copyright (C) 2014 Pavel Machek * * This software is licensed under the terms of the GNU General Public * License version 2, as published by the Free Software Foundation, and * may be copied, distributed, and modified under those terms. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * Note * http://www.ti.com/lit/er/sprz278f/sprz278f.pdf "Advisory * 3.1.1.186 MMC OCP Clock Not Gated When Thermal Sensor Is Used" * * Also TI says: * Just be careful when you try to make thermal policy like decisions * based on this sensor. Placement of the sensor w.r.t the actual logic * generating heat has to be a factor as well. If you are just looking * for an approximation temperature (thermometerish kind), you might be * ok with this. I am not sure we'd find any TI data around this.. just a * heads up. */ #include "ti-thermal.h" #include "ti-bandgap.h" /* * OMAP34XX has one instance of thermal sensor for MPU * need to describe the individual bit fields */ static struct temp_sensor_registers omap34xx_mpu_temp_sensor_registers = { .temp_sensor_ctrl = 0, .bgap_soc_mask = BIT(8), .bgap_eocz_mask = BIT(7), .bgap_dtemp_mask = 0x7f, .bgap_mode_ctrl = 0, .mode_ctrl_mask = BIT(9), }; /* Thresholds and limits for OMAP34XX MPU temperature sensor */ static struct temp_sensor_data omap34xx_mpu_temp_sensor_data = { .min_freq = 32768, .max_freq = 32768, .max_temp = 125000, .min_temp = -40000, .hyst_val = 5000, }; /* * Temperature values in milli degree celsius */ static const int omap34xx_adc_to_temp[128] = { -40000, -40000, -40000, -40000, -40000, -39000, -38000, -36000, -34000, -32000, -31000, -29000, -28000, -26000, -25000, -24000, -22000, -21000, -19000, -18000, -17000, -15000, -14000, -12000, -11000, -9000, -8000, -7000, -5000, -4000, -2000, -1000, 0000, 1000, 3000, 4000, 5000, 7000, 8000, 10000, 11000, 13000, 14000, 15000, 17000, 18000, 20000, 21000, 22000, 24000, 25000, 27000, 28000, 30000, 31000, 32000, 34000, 35000, 37000, 38000, 39000, 41000, 42000, 44000, 45000, 47000, 48000, 49000, 51000, 52000, 53000, 55000, 56000, 58000, 59000, 60000, 62000, 63000, 65000, 66000, 67000, 69000, 70000, 72000, 73000, 74000, 76000, 77000, 79000, 80000, 81000, 83000, 84000, 85000, 87000, 88000, 89000, 91000, 92000, 94000, 95000, 96000, 98000, 99000, 100000, 102000, 103000, 105000, 106000, 107000, 109000, 110000, 111000, 113000, 114000, 116000, 117000, 118000, 120000, 121000, 122000, 124000, 124000, 125000, 125000, 125000, 125000, 125000 }; /* OMAP34XX data */ const struct ti_bandgap_data omap34xx_data = { .features = TI_BANDGAP_FEATURE_CLK_CTRL | TI_BANDGAP_FEATURE_UNRELIABLE, .fclock_name = "ts_fck", .div_ck_name = "ts_fck", .conv_table = omap34xx_adc_to_temp, .adc_start_val = 0, .adc_end_val = 127, .expose_sensor = ti_thermal_expose_sensor, .remove_sensor = ti_thermal_remove_sensor, .sensors = { { .registers = &omap34xx_mpu_temp_sensor_registers, .ts_data = &omap34xx_mpu_temp_sensor_data, .domain = "cpu", .slope_pcb = 0, .constant_pcb = 20000, .register_cooling = NULL, .unregister_cooling = NULL, }, }, .sensor_count = 1, }; /* * OMAP36XX has one instance of thermal sensor for MPU * need to describe the individual bit fields */ static struct temp_sensor_registers omap36xx_mpu_temp_sensor_registers = { .temp_sensor_ctrl = 0, .bgap_soc_mask = BIT(9), .bgap_eocz_mask = BIT(8), .bgap_dtemp_mask = 0xFF, .bgap_mode_ctrl = 0, .mode_ctrl_mask = BIT(10), }; /* Thresholds and limits for OMAP36XX MPU temperature sensor */ static struct temp_sensor_data omap36xx_mpu_temp_sensor_data = { .min_freq = 32768, .max_freq = 32768, .max_temp = 125000, .min_temp = -40000, .hyst_val = 5000, }; /* * Temperature values in milli degree celsius */ static const int omap36xx_adc_to_temp[128] = { -40000, -40000, -40000, -40000, -40000, -40000, -40000, -40000, -40000, -40000, -40000, -40000, -40000, -38000, -35000, -34000, -32000, -30000, -28000, -26000, -24000, -22000, -20000, -18500, -17000, -15000, -13500, -12000, -10000, -8000, -6500, -5000, -3500, -1500, 0, 2000, 3500, 5000, 6500, 8500, 10000, 12000, 13500, 15000, 17000, 19000, 21000, 23000, 25000, 27000, 28500, 30000, 32000, 33500, 35000, 37000, 38500, 40000, 42000, 43500, 45000, 47000, 48500, 50000, 52000, 53500, 55000, 57000, 58500, 60000, 62000, 64000, 66000, 68000, 70000, 71500, 73500, 75000, 77000, 78500, 80000, 82000, 83500, 85000, 87000, 88500, 90000, 92000, 93500, 95000, 97000, 98500, 100000, 102000, 103500, 105000, 107000, 109000, 111000, 113000, 115000, 117000, 118500, 120000, 122000, 123500, 125000, 125000, 125000, 125000, 125000, 125000, 125000, 125000, 125000, 125000, 125000, 125000, 125000, 125000, 125000, 125000, 125000, 125000, 125000, 125000, 125000, 125000 }; /* OMAP36XX data */ const struct ti_bandgap_data omap36xx_data = { .features = TI_BANDGAP_FEATURE_CLK_CTRL | TI_BANDGAP_FEATURE_UNRELIABLE, .fclock_name = "ts_fck", .div_ck_name = "ts_fck", .conv_table = omap36xx_adc_to_temp, .adc_start_val = 0, .adc_end_val = 127, .expose_sensor = ti_thermal_expose_sensor, .remove_sensor = ti_thermal_remove_sensor, .sensors = { { .registers = &omap36xx_mpu_temp_sensor_registers, .ts_data = &omap36xx_mpu_temp_sensor_data, .domain = "cpu", .slope_pcb = 0, .constant_pcb = 20000, .register_cooling = NULL, .unregister_cooling = NULL, }, }, .sensor_count = 1, };