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 */
 36static struct temp_sensor_registers
 37omap34xx_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 */
 48static 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 */
 59static const int
 60omap34xx_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 */
 79const 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_pcb = 0,
 95		.constant_pcb = 20000,
 96		.register_cooling = NULL,
 97		.unregister_cooling = NULL,
 98		},
 99	},
100	.sensor_count = 1,
101};
102
103/*
104 * OMAP36XX has one instance of thermal sensor for MPU
105 * need to describe the individual bit fields
106 */
107static struct temp_sensor_registers
108omap36xx_mpu_temp_sensor_registers = {
109	.temp_sensor_ctrl = 0,
110	.bgap_soc_mask = BIT(9),
111	.bgap_eocz_mask = BIT(8),
112	.bgap_dtemp_mask = 0xFF,
113
114	.bgap_mode_ctrl = 0,
115	.mode_ctrl_mask = BIT(10),
116};
117
118/* Thresholds and limits for OMAP36XX MPU temperature sensor */
119static struct temp_sensor_data omap36xx_mpu_temp_sensor_data = {
120	.min_freq = 32768,
121	.max_freq = 32768,
122	.max_temp = 125000,
123	.min_temp = -40000,
124	.hyst_val = 5000,
125};
126
127/*
128 * Temperature values in milli degree celsius
129 */
130static const int
131omap36xx_adc_to_temp[128] = {
132	-40000, -40000, -40000, -40000, -40000, -40000, -40000, -40000,
133	-40000, -40000, -40000,	-40000, -40000, -38000, -35000, -34000,
134	-32000, -30000, -28000, -26000, -24000, -22000,	-20000, -18500,
135	-17000, -15000, -13500, -12000, -10000, -8000, -6500, -5000, -3500,
136	-1500, 0, 2000, 3500, 5000, 6500, 8500, 10000, 12000, 13500,
137	15000, 17000, 19000, 21000, 23000, 25000, 27000, 28500, 30000,
138	32000, 33500, 35000, 37000, 38500, 40000, 42000, 43500, 45000,
139	47000, 48500, 50000, 52000, 53500, 55000, 57000, 58500, 60000,
140	62000, 64000, 66000, 68000, 70000, 71500, 73500, 75000, 77000,
141	78500, 80000, 82000, 83500, 85000, 87000, 88500, 90000, 92000,
142	93500, 95000, 97000, 98500, 100000, 102000, 103500, 105000, 107000,
143	109000, 111000, 113000, 115000, 117000, 118500, 120000, 122000,
144	123500, 125000, 125000, 125000, 125000, 125000, 125000, 125000,
145	125000, 125000, 125000, 125000, 125000, 125000, 125000, 125000,
146	125000, 125000, 125000, 125000, 125000, 125000,	125000
147};
148
149/* OMAP36XX data */
150const struct ti_bandgap_data omap36xx_data = {
151	.features = TI_BANDGAP_FEATURE_CLK_CTRL | TI_BANDGAP_FEATURE_UNRELIABLE,
152	.fclock_name = "ts_fck",
153	.div_ck_name = "ts_fck",
154	.conv_table = omap36xx_adc_to_temp,
155	.adc_start_val = 0,
156	.adc_end_val = 127,
157	.expose_sensor = ti_thermal_expose_sensor,
158	.remove_sensor = ti_thermal_remove_sensor,
159
160	.sensors = {
161		{
162		.registers = &omap36xx_mpu_temp_sensor_registers,
163		.ts_data = &omap36xx_mpu_temp_sensor_data,
164		.domain = "cpu",
165		.slope_pcb = 0,
166		.constant_pcb = 20000,
167		.register_cooling = NULL,
168		.unregister_cooling = NULL,
169		},
170	},
171	.sensor_count = 1,
172};