blob: fe74c69f97ec3a3ebb9164a0e585b482b6d66628 [file] [log] [blame]
Simon Glassdbeda5b2015-04-20 12:37:23 -06001/*
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
13int 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
23int 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
33int 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
43int 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
53int 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
63int rtc_read32(struct udevice *dev, unsigned int reg, u32 *valuep)
64{
65 u32 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)
72 return ret;
73 value |= ret << (i << 3);
74 }
75
76 *valuep = value;
77 return 0;
78}
79
80int rtc_write32(struct udevice *dev, unsigned int reg, u32 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
93UCLASS_DRIVER(rtc) = {
94 .name = "rtc",
95 .id = UCLASS_RTC,
96};