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60aef7ce LJ |
1 | /* |
2 | * ST Thermal Sensor Driver for STi series of SoCs | |
3 | * Author: Ajit Pal Singh <ajitpal.singh@st.com> | |
4 | * | |
5 | * Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | */ | |
12 | ||
13 | #ifndef __STI_THERMAL_SYSCFG_H | |
14 | #define __STI_THERMAL_SYSCFG_H | |
15 | ||
16 | #include <linux/interrupt.h> | |
17 | #include <linux/platform_device.h> | |
18 | #include <linux/regmap.h> | |
19 | #include <linux/thermal.h> | |
20 | ||
21 | enum st_thermal_regfield_ids { | |
22 | INT_THRESH_HI = 0, /* Top two regfield IDs are mutually exclusive */ | |
23 | TEMP_PWR = 0, | |
24 | DCORRECT, | |
25 | OVERFLOW, | |
26 | DATA, | |
27 | INT_ENABLE, | |
28 | ||
29 | MAX_REGFIELDS | |
30 | }; | |
31 | ||
32 | /* Thermal sensor power states */ | |
33 | enum st_thermal_power_state { | |
34 | POWER_OFF = 0, | |
35 | POWER_ON | |
36 | }; | |
37 | ||
38 | struct st_thermal_sensor; | |
39 | ||
40 | /** | |
41 | * Description of private thermal sensor ops. | |
42 | * | |
43 | * @power_ctrl: Function for powering on/off a sensor. Clock to the | |
44 | * sensor is also controlled from this function. | |
45 | * @alloc_regfields: Allocate regmap register fields, specific to a sensor. | |
46 | * @do_memmap_regmap: Memory map the thermal register space and init regmap | |
47 | * instance or find regmap instance. | |
48 | * @register_irq: Register an interrupt handler for a sensor. | |
49 | */ | |
50 | struct st_thermal_sensor_ops { | |
51 | int (*power_ctrl)(struct st_thermal_sensor *, enum st_thermal_power_state); | |
52 | int (*alloc_regfields)(struct st_thermal_sensor *); | |
53 | int (*regmap_init)(struct st_thermal_sensor *); | |
54 | int (*register_enable_irq)(struct st_thermal_sensor *); | |
55 | int (*enable_irq)(struct st_thermal_sensor *); | |
56 | }; | |
57 | ||
58 | /** | |
59 | * Description of thermal driver compatible data. | |
60 | * | |
61 | * @reg_fields: Pointer to the regfields array for a sensor. | |
62 | * @sys_compat: Pointer to the syscon node compatible string. | |
63 | * @ops: Pointer to private thermal ops for a sensor. | |
64 | * @calibration_val: Default calibration value to be written to the DCORRECT | |
65 | * register field for a sensor. | |
66 | * @temp_adjust_val: Value to be added/subtracted from the data read from | |
67 | * the sensor. If value needs to be added please provide a | |
68 | * positive value and if it is to be subtracted please | |
69 | * provide a negative value. | |
70 | * @crit_temp: The temperature beyond which the SoC should be shutdown | |
71 | * to prevent damage. | |
72 | */ | |
73 | struct st_thermal_compat_data { | |
74 | char *sys_compat; | |
75 | const struct reg_field *reg_fields; | |
76 | const struct st_thermal_sensor_ops *ops; | |
77 | unsigned int calibration_val; | |
78 | int temp_adjust_val; | |
79 | int crit_temp; | |
80 | }; | |
81 | ||
82 | struct st_thermal_sensor { | |
83 | struct device *dev; | |
84 | struct thermal_zone_device *thermal_dev; | |
85 | const struct st_thermal_sensor_ops *ops; | |
86 | const struct st_thermal_compat_data *cdata; | |
87 | struct clk *clk; | |
88 | struct regmap *regmap; | |
89 | struct regmap_field *pwr; | |
90 | struct regmap_field *dcorrect; | |
91 | struct regmap_field *overflow; | |
92 | struct regmap_field *temp_data; | |
93 | struct regmap_field *int_thresh_hi; | |
94 | struct regmap_field *int_enable; | |
95 | int irq; | |
96 | void __iomem *mmio_base; | |
97 | }; | |
98 | ||
99 | extern int st_thermal_register(struct platform_device *pdev, | |
100 | const struct of_device_id *st_thermal_of_match); | |
101 | extern int st_thermal_unregister(struct platform_device *pdev); | |
102 | extern const struct dev_pm_ops st_thermal_pm_ops; | |
103 | ||
104 | #endif /* __STI_RESET_SYSCFG_H */ |