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Simon Glass57251282015-06-23 15:38:43 -06001/*
2 * Copyright (c) 2015 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
4 *
5 * SPDX-License-Identifier: GPL-2.0+
6 */
7
8#ifndef __SYSCON_H
9#define __SYSCON_H
10
11/**
12 * struct syscon_uc_info - Information stored by the syscon UCLASS_UCLASS
13 *
14 * @regmap: Register map for this controller
15 */
16struct syscon_uc_info {
17 struct regmap *regmap;
18};
19
20/* So far there are no ops so this is a placeholder */
21struct syscon_ops {
22};
23
24#define syscon_get_ops(dev) ((struct syscon_ops *)(dev)->driver->ops)
25
26/**
27 * syscon_get_regmap() - Get access to a register map
28 *
29 * @dev: Device to check (UCLASS_SCON)
30 * @info: Returns regmap for the device
31 * @return 0 if OK, -ve on error
32 */
33struct regmap *syscon_get_regmap(struct udevice *dev);
34
35/**
36 * syscon_get_regmap_by_driver_data() - Look up a controller by its ID
37 *
38 * Each system controller can be accessed by its driver data, which is
39 * assumed to be unique through the scope of all system controllers that
40 * are in use. This function looks up the regmap given this driver data.
41 *
42 * @driver_data: Driver data value to look up
43 * @return register map correponding to @driver_data, or -ve error code
44 */
45struct regmap *syscon_get_regmap_by_driver_data(ulong driver_data);
46
47/**
48 * syscon_get_first_range() - get the first memory range from a syscon regmap
49 *
50 * @driver_data: Driver data value to look up
51 * @return first region of register map correponding to @driver_data, or
52 * -ve error code
53 */
54void *syscon_get_first_range(ulong driver_data);
55
56#endif