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review.shift-gmbh.com / SHIFTPHONES / mainline / linux / b24413180f5600bcb3bb70fbed5cf186b60864bd / . / drivers / sbus / char / bbc_i2c.h
blob: c2d066d3fa41d76b8f4e4fe9e3f67beac4e3c23c [file] [log] [blame]
Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +0100[diff] [blame^]1/* SPDX-License-Identifier: GPL-2.0 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2#ifndef _BBC_I2C_H
3#define _BBC_I2C_H
4
David S. Millere21e2452008-08-29 22:34:14 -0700[diff] [blame]5#include <linux/of.h>
6#include <linux/of_device.h>
7#include <linux/list.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]8
David S. Millere21e2452008-08-29 22:34:14 -0700[diff] [blame]9struct bbc_i2c_client {
10 struct bbc_i2c_bus *bp;
Grant Likely2dc11582010-08-06 09:25:50 -0600[diff] [blame]11 struct platform_device *op;
David S. Millere21e2452008-08-29 22:34:14 -0700[diff] [blame]12 int bus;
13 int address;
14};
15
16enum fan_action { FAN_SLOWER, FAN_SAME, FAN_FASTER, FAN_FULLBLAST, FAN_STATE_MAX };
17
18struct bbc_cpu_temperature {
19 struct list_head bp_list;
20 struct list_head glob_list;
21
22 struct bbc_i2c_client *client;
23 int index;
24
25 /* Current readings, and history. */
26 s8 curr_cpu_temp;
27 s8 curr_amb_temp;
28 s8 prev_cpu_temp;
29 s8 prev_amb_temp;
30 s8 avg_cpu_temp;
31 s8 avg_amb_temp;
32
33 int sample_tick;
34
35 enum fan_action fan_todo[2];
36#define FAN_AMBIENT 0
37#define FAN_CPU 1
38};
39
40struct bbc_fan_control {
41 struct list_head bp_list;
42 struct list_head glob_list;
43
44 struct bbc_i2c_client *client;
45 int index;
46
47 int psupply_fan_on;
48 int cpu_fan_speed;
49 int system_fan_speed;
50};
51
52#define NUM_CHILDREN 8
53
54struct bbc_i2c_bus {
55 struct bbc_i2c_bus *next;
56 int index;
57 spinlock_t lock;
58 void __iomem *i2c_bussel_reg;
59 void __iomem *i2c_control_regs;
60 unsigned char own, clock;
61
62 wait_queue_head_t wq;
63 volatile int waiting;
64
65 struct list_head temps;
66 struct list_head fans;
67
Grant Likely2dc11582010-08-06 09:25:50 -0600[diff] [blame]68 struct platform_device *op;
David S. Millere21e2452008-08-29 22:34:14 -0700[diff] [blame]69 struct {
Grant Likely2dc11582010-08-06 09:25:50 -0600[diff] [blame]70 struct platform_device *device;
David S. Millere21e2452008-08-29 22:34:14 -0700[diff] [blame]71 int client_claimed;
72 } devs[NUM_CHILDREN];
73};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]74
75/* Probing and attachment. */
Grant Likely2dc11582010-08-06 09:25:50 -0600[diff] [blame]76extern struct platform_device *bbc_i2c_getdev(struct bbc_i2c_bus *, int);
77extern struct bbc_i2c_client *bbc_i2c_attach(struct bbc_i2c_bus *bp, struct platform_device *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]78extern void bbc_i2c_detach(struct bbc_i2c_client *);
79
80/* Register read/write. NOTE: Blocking! */
81extern int bbc_i2c_writeb(struct bbc_i2c_client *, unsigned char val, int off);
82extern int bbc_i2c_readb(struct bbc_i2c_client *, unsigned char *byte, int off);
83extern int bbc_i2c_write_buf(struct bbc_i2c_client *, char *buf, int len, int off);
84extern int bbc_i2c_read_buf(struct bbc_i2c_client *, char *buf, int len, int off);
85
86#endif /* _BBC_I2C_H */