blob: f292fbe9b66fbbd77214e948278844213527ed0f [file] [log] [blame]
Simon Glass58714162015-04-20 12:37:25 -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 <i2c.h>
11#include <rtc.h>
12#include <asm/rtc.h>
13
14#define REG_COUNT 0x80
15
16static int sandbox_rtc_get(struct udevice *dev, struct rtc_time *time)
17{
18 time->tm_sec = dm_i2c_reg_read(dev, REG_SEC);
19 if (time->tm_sec < 0)
20 return time->tm_sec;
21 time->tm_min = dm_i2c_reg_read(dev, REG_MIN);
22 if (time->tm_min < 0)
23 return time->tm_min;
24 time->tm_hour = dm_i2c_reg_read(dev, REG_HOUR);
25 if (time->tm_hour < 0)
26 return time->tm_hour;
27 time->tm_mday = dm_i2c_reg_read(dev, REG_MDAY);
28 if (time->tm_mday < 0)
29 return time->tm_mday;
30 time->tm_mon = dm_i2c_reg_read(dev, REG_MON);
31 if (time->tm_mon < 0)
32 return time->tm_mon;
33 time->tm_year = dm_i2c_reg_read(dev, REG_YEAR);
34 if (time->tm_year < 0)
35 return time->tm_year;
36 time->tm_year += 1900;
37 time->tm_wday = dm_i2c_reg_read(dev, REG_WDAY);
38 if (time->tm_wday < 0)
39 return time->tm_wday;
40
41 return 0;
42}
43
44static int sandbox_rtc_set(struct udevice *dev, const struct rtc_time *time)
45{
46 int ret;
47
48 ret = dm_i2c_reg_write(dev, REG_SEC, time->tm_sec);
49 if (ret < 0)
50 return ret;
51 ret = dm_i2c_reg_write(dev, REG_MIN, time->tm_min);
52 if (ret < 0)
53 return ret;
54 ret = dm_i2c_reg_write(dev, REG_HOUR, time->tm_hour);
55 if (ret < 0)
56 return ret;
57 ret = dm_i2c_reg_write(dev, REG_MDAY, time->tm_mday);
58 if (ret < 0)
59 return ret;
60 ret = dm_i2c_reg_write(dev, REG_MON, time->tm_mon);
61 if (ret < 0)
62 return ret;
63 ret = dm_i2c_reg_write(dev, REG_YEAR, time->tm_year - 1900);
64 if (ret < 0)
65 return ret;
66 ret = dm_i2c_reg_write(dev, REG_WDAY, time->tm_wday);
67 if (ret < 0)
68 return ret;
69
70 return 0;
71}
72
73static int sandbox_rtc_reset(struct udevice *dev)
74{
75 return dm_i2c_reg_write(dev, REG_RESET, 0);
76}
77
78static int sandbox_rtc_read8(struct udevice *dev, unsigned int reg)
79{
80 return dm_i2c_reg_read(dev, reg);
81}
82
83static int sandbox_rtc_write8(struct udevice *dev, unsigned int reg, int val)
84{
85 return dm_i2c_reg_write(dev, reg, val);
86}
87
88static const struct rtc_ops sandbox_rtc_ops = {
89 .get = sandbox_rtc_get,
90 .set = sandbox_rtc_set,
91 .reset = sandbox_rtc_reset,
92 .read8 = sandbox_rtc_read8,
93 .write8 = sandbox_rtc_write8,
94};
95
96static const struct udevice_id sandbox_rtc_ids[] = {
97 { .compatible = "sandbox-rtc" },
98 { }
99};
100
101U_BOOT_DRIVER(rtc_sandbox) = {
102 .name = "rtc-sandbox",
103 .id = UCLASS_RTC,
104 .of_match = sandbox_rtc_ids,
105 .ops = &sandbox_rtc_ops,
106};