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dbeda5b2 SG |
1 | /* |
2 | * (C) Copyright 2015 Google, Inc | |
3 | * Written by Simon Glass <sjg@chromium.org> | |
4 | * | |
5 | * SPDX-License-Identifier: GPL-2.0+ | |
6 | */ | |
7 | ||
8 | #include <common.h> | |
9 | #include <dm.h> | |
10 | #include <errno.h> | |
11 | #include <rtc.h> | |
12 | ||
13 | int dm_rtc_get(struct udevice *dev, struct rtc_time *time) | |
14 | { | |
15 | struct rtc_ops *ops = rtc_get_ops(dev); | |
16 | ||
17 | assert(ops); | |
18 | if (!ops->get) | |
19 | return -ENOSYS; | |
20 | return ops->get(dev, time); | |
21 | } | |
22 | ||
23 | int dm_rtc_set(struct udevice *dev, struct rtc_time *time) | |
24 | { | |
25 | struct rtc_ops *ops = rtc_get_ops(dev); | |
26 | ||
27 | assert(ops); | |
28 | if (!ops->set) | |
29 | return -ENOSYS; | |
30 | return ops->set(dev, time); | |
31 | } | |
32 | ||
33 | int dm_rtc_reset(struct udevice *dev) | |
34 | { | |
35 | struct rtc_ops *ops = rtc_get_ops(dev); | |
36 | ||
37 | assert(ops); | |
38 | if (!ops->reset) | |
39 | return -ENOSYS; | |
40 | return ops->reset(dev); | |
41 | } | |
42 | ||
43 | int rtc_read8(struct udevice *dev, unsigned int reg) | |
44 | { | |
45 | struct rtc_ops *ops = rtc_get_ops(dev); | |
46 | ||
47 | assert(ops); | |
48 | if (!ops->read8) | |
49 | return -ENOSYS; | |
50 | return ops->read8(dev, reg); | |
51 | } | |
52 | ||
53 | int rtc_write8(struct udevice *dev, unsigned int reg, int val) | |
54 | { | |
55 | struct rtc_ops *ops = rtc_get_ops(dev); | |
56 | ||
57 | assert(ops); | |
58 | if (!ops->write8) | |
59 | return -ENOSYS; | |
60 | return ops->write8(dev, reg, val); | |
61 | } | |
62 | ||
d24c7fbc BM |
63 | int rtc_read16(struct udevice *dev, unsigned int reg, u16 *valuep) |
64 | { | |
65 | u16 value = 0; | |
66 | int ret; | |
67 | int i; | |
68 | ||
69 | for (i = 0; i < sizeof(value); i++) { | |
70 | ret = rtc_read8(dev, reg + i); | |
71 | if (ret < 0) | |
72 | return ret; | |
73 | value |= ret << (i << 3); | |
74 | } | |
75 | ||
76 | *valuep = value; | |
77 | return 0; | |
78 | } | |
79 | ||
80 | int rtc_write16(struct udevice *dev, unsigned int reg, u16 value) | |
81 | { | |
82 | int i, ret; | |
83 | ||
84 | for (i = 0; i < sizeof(value); i++) { | |
85 | ret = rtc_write8(dev, reg + i, (value >> (i << 3)) & 0xff); | |
86 | if (ret) | |
87 | return ret; | |
88 | } | |
89 | ||
90 | return 0; | |
91 | } | |
92 | ||
dbeda5b2 SG |
93 | int rtc_read32(struct udevice *dev, unsigned int reg, u32 *valuep) |
94 | { | |
95 | u32 value = 0; | |
96 | int ret; | |
97 | int i; | |
98 | ||
99 | for (i = 0; i < sizeof(value); i++) { | |
100 | ret = rtc_read8(dev, reg + i); | |
9a4eb597 | 101 | if (ret < 0) |
dbeda5b2 SG |
102 | return ret; |
103 | value |= ret << (i << 3); | |
104 | } | |
105 | ||
106 | *valuep = value; | |
107 | return 0; | |
108 | } | |
109 | ||
110 | int rtc_write32(struct udevice *dev, unsigned int reg, u32 value) | |
111 | { | |
112 | int i, ret; | |
113 | ||
114 | for (i = 0; i < sizeof(value); i++) { | |
115 | ret = rtc_write8(dev, reg + i, (value >> (i << 3)) & 0xff); | |
116 | if (ret) | |
117 | return ret; | |
118 | } | |
119 | ||
120 | return 0; | |
121 | } | |
122 | ||
123 | UCLASS_DRIVER(rtc) = { | |
124 | .name = "rtc", | |
125 | .id = UCLASS_RTC, | |
126 | }; |