1/*
 2 * Copyright (C) ST-Ericsson SA 2010
 3 * Author: Mattias Nilsson <mattias.i.nilsson@stericsson.com> for ST Ericsson.
 4 * License terms: GNU General Public License (GPL) version 2
 5 */
 6
 7#include <linux/err.h>
 
 8#include <linux/platform_device.h>
 9#include <linux/mfd/ab8500.h>
10#include <linux/mfd/abx500.h>
11#include <linux/mfd/ab8500/sysctrl.h>
 
12
13static struct device *sysctrl_dev;
14
15static inline bool valid_bank(u8 bank)
16{
17	return ((bank == AB8500_SYS_CTRL1_BLOCK) ||
18		(bank == AB8500_SYS_CTRL2_BLOCK));
19}
20
21int ab8500_sysctrl_read(u16 reg, u8 *value)
22{
23	u8 bank;
24
25	if (sysctrl_dev == NULL)
26		return -EAGAIN;
27
28	bank = (reg >> 8);
29	if (!valid_bank(bank))
30		return -EINVAL;
31
32	return abx500_get_register_interruptible(sysctrl_dev, bank,
33		(u8)(reg & 0xFF), value);
34}
35
36int ab8500_sysctrl_write(u16 reg, u8 mask, u8 value)
37{
38	u8 bank;
39
40	if (sysctrl_dev == NULL)
41		return -EAGAIN;
42
43	bank = (reg >> 8);
44	if (!valid_bank(bank))
45		return -EINVAL;
46
47	return abx500_mask_and_set_register_interruptible(sysctrl_dev, bank,
48		(u8)(reg & 0xFF), mask, value);
49}
50
51static int __devinit ab8500_sysctrl_probe(struct platform_device *pdev)
52{
53	sysctrl_dev = &pdev->dev;
54	return 0;
55}
56
57static int __devexit ab8500_sysctrl_remove(struct platform_device *pdev)
58{
59	sysctrl_dev = NULL;
60	return 0;
61}
62
 
 
 
 
 
63static struct platform_driver ab8500_sysctrl_driver = {
64	.driver = {
65		.name = "ab8500-sysctrl",
66		.owner = THIS_MODULE,
 
67	},
68	.probe = ab8500_sysctrl_probe,
69	.remove = __devexit_p(ab8500_sysctrl_remove),
70};
71
72static int __init ab8500_sysctrl_init(void)
73{
74	return platform_driver_register(&ab8500_sysctrl_driver);
75}
76subsys_initcall(ab8500_sysctrl_init);
77
78MODULE_AUTHOR("Mattias Nilsson <mattias.i.nilsson@stericsson.com");
79MODULE_DESCRIPTION("AB8500 system control driver");
80MODULE_LICENSE("GPL v2");

 1/*
 2 * Copyright (C) ST-Ericsson SA 2010
 3 * Author: Mattias Nilsson <mattias.i.nilsson@stericsson.com> for ST Ericsson.
 4 * License terms: GNU General Public License (GPL) version 2
 5 */
 6
 7#include <linux/err.h>
 8#include <linux/module.h>
 9#include <linux/platform_device.h>
 
10#include <linux/mfd/abx500.h>
11#include <linux/mfd/abx500/ab8500.h>
12#include <linux/mfd/abx500/ab8500-sysctrl.h>
13
14static struct device *sysctrl_dev;
15
16static inline bool valid_bank(u8 bank)
17{
18	return ((bank == AB8500_SYS_CTRL1_BLOCK) ||
19		(bank == AB8500_SYS_CTRL2_BLOCK));
20}
21
22int ab8500_sysctrl_read(u16 reg, u8 *value)
23{
24	u8 bank;
25
26	if (sysctrl_dev == NULL)
27		return -EAGAIN;
28
29	bank = (reg >> 8);
30	if (!valid_bank(bank))
31		return -EINVAL;
32
33	return abx500_get_register_interruptible(sysctrl_dev, bank,
34		(u8)(reg & 0xFF), value);
35}
36
37int ab8500_sysctrl_write(u16 reg, u8 mask, u8 value)
38{
39	u8 bank;
40
41	if (sysctrl_dev == NULL)
42		return -EAGAIN;
43
44	bank = (reg >> 8);
45	if (!valid_bank(bank))
46		return -EINVAL;
47
48	return abx500_mask_and_set_register_interruptible(sysctrl_dev, bank,
49		(u8)(reg & 0xFF), mask, value);
50}
51
52static int __devinit ab8500_sysctrl_probe(struct platform_device *pdev)
53{
54	sysctrl_dev = &pdev->dev;
55	return 0;
56}
57
58static int __devexit ab8500_sysctrl_remove(struct platform_device *pdev)
59{
60	sysctrl_dev = NULL;
61	return 0;
62}
63
64static const struct of_device_id ab8500_sysctrl_match[] = {
65	{ .compatible = "stericsson,ab8500-sysctrl", },
66	{}
67};
68
69static struct platform_driver ab8500_sysctrl_driver = {
70	.driver = {
71		.name = "ab8500-sysctrl",
72		.owner = THIS_MODULE,
73		.of_match_table = ab8500_sysctrl_match,
74	},
75	.probe = ab8500_sysctrl_probe,
76	.remove = __devexit_p(ab8500_sysctrl_remove),
77};
78
79static int __init ab8500_sysctrl_init(void)
80{
81	return platform_driver_register(&ab8500_sysctrl_driver);
82}
83subsys_initcall(ab8500_sysctrl_init);
84
85MODULE_AUTHOR("Mattias Nilsson <mattias.i.nilsson@stericsson.com");
86MODULE_DESCRIPTION("AB8500 system control driver");
87MODULE_LICENSE("GPL v2");