1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2015 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
13 #define REG_COUNT 0x80
15 static int sandbox_rtc_get(struct udevice *dev, struct rtc_time *time)
20 ret = dm_i2c_read(dev, REG_SEC, buf, sizeof(buf));
24 time->tm_sec = buf[REG_SEC - REG_SEC];
25 time->tm_min = buf[REG_MIN - REG_SEC];
26 time->tm_hour = buf[REG_HOUR - REG_SEC];
27 time->tm_mday = buf[REG_MDAY - REG_SEC];
28 time->tm_mon = buf[REG_MON - REG_SEC];
29 time->tm_year = buf[REG_YEAR - REG_SEC] + 1900;
30 time->tm_wday = buf[REG_WDAY - REG_SEC];
35 static int sandbox_rtc_set(struct udevice *dev, const struct rtc_time *time)
40 buf[REG_SEC - REG_SEC] = time->tm_sec;
41 buf[REG_MIN - REG_SEC] = time->tm_min;
42 buf[REG_HOUR - REG_SEC] = time->tm_hour;
43 buf[REG_MDAY - REG_SEC] = time->tm_mday;
44 buf[REG_MON - REG_SEC] = time->tm_mon;
45 buf[REG_YEAR - REG_SEC] = time->tm_year - 1900;
46 buf[REG_WDAY - REG_SEC] = time->tm_wday;
48 ret = dm_i2c_write(dev, REG_SEC, buf, sizeof(buf));
55 static int sandbox_rtc_reset(struct udevice *dev)
57 return dm_i2c_reg_write(dev, REG_RESET, 0);
60 static int sandbox_rtc_read8(struct udevice *dev, unsigned int reg)
62 return dm_i2c_reg_read(dev, reg);
65 static int sandbox_rtc_write8(struct udevice *dev, unsigned int reg, int val)
67 return dm_i2c_reg_write(dev, reg, val);
70 static const struct rtc_ops sandbox_rtc_ops = {
71 .get = sandbox_rtc_get,
72 .set = sandbox_rtc_set,
73 .reset = sandbox_rtc_reset,
74 .read8 = sandbox_rtc_read8,
75 .write8 = sandbox_rtc_write8,
78 static const struct udevice_id sandbox_rtc_ids[] = {
79 { .compatible = "sandbox-rtc" },
83 U_BOOT_DRIVER(rtc_sandbox) = {
84 .name = "rtc-sandbox",
86 .of_match = sandbox_rtc_ids,
87 .ops = &sandbox_rtc_ops,