tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Register map access API - SPMI support
3 *
4 * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
5 *
6 * Based on regmap-i2c.c:
7 * Copyright 2011 Wolfson Microelectronics plc
8 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 and
12 * only version 2 as published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 */
20#include <linux/regmap.h>
21#include <linux/spmi.h>
22#include <linux/module.h>
23#include <linux/init.h>
24
25static int regmap_spmi_read(void *context,
26 const void *reg, size_t reg_size,
27 void *val, size_t val_size)
28{
29 BUG_ON(reg_size != 2);
30 return spmi_ext_register_readl(context, *(u16 *)reg,
31 val, val_size);
32}
33
34static int regmap_spmi_gather_write(void *context,
35 const void *reg, size_t reg_size,
36 const void *val, size_t val_size)
37{
38 BUG_ON(reg_size != 2);
39 return spmi_ext_register_writel(context, *(u16 *)reg, val, val_size);
40}
41
42static int regmap_spmi_write(void *context, const void *data,
43 size_t count)
44{
45 BUG_ON(count < 2);
46 return regmap_spmi_gather_write(context, data, 2, data + 2, count - 2);
47}
48
49static struct regmap_bus regmap_spmi = {
50 .read = regmap_spmi_read,
51 .write = regmap_spmi_write,
52 .gather_write = regmap_spmi_gather_write,
53 .reg_format_endian_default = REGMAP_ENDIAN_NATIVE,
54 .val_format_endian_default = REGMAP_ENDIAN_NATIVE,
55};
56
57/**
58 * regmap_init_spmi(): Initialize register map
59 *
60 * @sdev: Device that will be interacted with
61 * @config: Configuration for register map
62 *
63 * The return value will be an ERR_PTR() on error or a valid pointer to
64 * a struct regmap.
65 */
66struct regmap *regmap_init_spmi(struct spmi_device *sdev,
67 const struct regmap_config *config)
68{
69 return regmap_init(&sdev->dev, ®map_spmi, sdev, config);
70}
71EXPORT_SYMBOL_GPL(regmap_init_spmi);
72
73/**
74 * devm_regmap_init_spmi(): Initialise managed register map
75 *
76 * @sdev: Device that will be interacted with
77 * @config: Configuration for register map
78 *
79 * The return value will be an ERR_PTR() on error or a valid pointer
80 * to a struct regmap. The regmap will be automatically freed by the
81 * device management code.
82 */
83struct regmap *devm_regmap_init_spmi(struct spmi_device *sdev,
84 const struct regmap_config *config)
85{
86 return devm_regmap_init(&sdev->dev, ®map_spmi, sdev, config);
87}
88EXPORT_SYMBOL_GPL(devm_regmap_init_spmi);
89
90MODULE_LICENSE("GPL");