1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _BBC_I2C_H |
3 | #define _BBC_I2C_H |
4 | |
5 | #include <linux/of.h> |
6 | #include <linux/list.h> |
7 | |
8 | struct bbc_i2c_client { |
9 | struct bbc_i2c_bus *bp; |
10 | struct platform_device *op; |
11 | int bus; |
12 | int address; |
13 | }; |
14 | |
15 | enum fan_action { FAN_SLOWER, FAN_SAME, FAN_FASTER, FAN_FULLBLAST, FAN_STATE_MAX }; |
16 | |
17 | struct bbc_cpu_temperature { |
18 | struct list_head bp_list; |
19 | struct list_head glob_list; |
20 | |
21 | struct bbc_i2c_client *client; |
22 | int index; |
23 | |
24 | /* Current readings, and history. */ |
25 | s8 curr_cpu_temp; |
26 | s8 curr_amb_temp; |
27 | s8 prev_cpu_temp; |
28 | s8 prev_amb_temp; |
29 | s8 avg_cpu_temp; |
30 | s8 avg_amb_temp; |
31 | |
32 | int sample_tick; |
33 | |
34 | enum fan_action fan_todo[2]; |
35 | #define FAN_AMBIENT 0 |
36 | #define FAN_CPU 1 |
37 | }; |
38 | |
39 | struct bbc_fan_control { |
40 | struct list_head bp_list; |
41 | struct list_head glob_list; |
42 | |
43 | struct bbc_i2c_client *client; |
44 | int index; |
45 | |
46 | int psupply_fan_on; |
47 | int cpu_fan_speed; |
48 | int system_fan_speed; |
49 | }; |
50 | |
51 | #define NUM_CHILDREN 8 |
52 | |
53 | struct bbc_i2c_bus { |
54 | struct bbc_i2c_bus *next; |
55 | int index; |
56 | spinlock_t lock; |
57 | void __iomem *i2c_bussel_reg; |
58 | void __iomem *i2c_control_regs; |
59 | unsigned char own, clock; |
60 | |
61 | wait_queue_head_t wq; |
62 | volatile int waiting; |
63 | |
64 | struct list_head temps; |
65 | struct list_head fans; |
66 | |
67 | struct platform_device *op; |
68 | struct { |
69 | struct platform_device *device; |
70 | int client_claimed; |
71 | } devs[NUM_CHILDREN]; |
72 | }; |
73 | |
74 | /* Probing and attachment. */ |
75 | extern struct platform_device *bbc_i2c_getdev(struct bbc_i2c_bus *, int); |
76 | extern struct bbc_i2c_client *bbc_i2c_attach(struct bbc_i2c_bus *bp, struct platform_device *); |
77 | extern void bbc_i2c_detach(struct bbc_i2c_client *); |
78 | |
79 | /* Register read/write. NOTE: Blocking! */ |
80 | extern int bbc_i2c_writeb(struct bbc_i2c_client *, unsigned char val, int off); |
81 | extern int bbc_i2c_readb(struct bbc_i2c_client *, unsigned char *byte, int off); |
82 | extern int bbc_i2c_write_buf(struct bbc_i2c_client *, char *buf, int len, int off); |
83 | extern int bbc_i2c_read_buf(struct bbc_i2c_client *, char *buf, int len, int off); |
84 | |
85 | extern int bbc_envctrl_init(struct bbc_i2c_bus *bp); |
86 | extern void bbc_envctrl_cleanup(struct bbc_i2c_bus *bp); |
87 | |
88 | #endif /* _BBC_I2C_H */ |
89 | |