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 = 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 */
109static struct temp_sensor_registers
110omap36xx_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 */
121static 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 */
132static const int
133omap36xx_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 */
152const 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};
177