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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / cfa3ed4390c158b527bdb2ceceacf7eabae1b01e / . / drivers / rtc / sandbox_rtc.c
blob: 852770a49cf8d9b97696b317c3f53f3b427b7684 [file] [log] [blame]
Tom Rini83d290c2018-05-06 17:58:06 -0400[diff] [blame]1// SPDX-License-Identifier: GPL-2.0+
Simon Glass58714162015-04-20 12:37:25 -0600[diff] [blame]2/*
3 * (C) Copyright 2015 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
Simon Glass58714162015-04-20 12:37:25 -0600[diff] [blame]5 */
6
7#include <common.h>
8#include <dm.h>
9#include <i2c.h>
10#include <rtc.h>
11#include <asm/rtc.h>
Simon Glass31e17872020-07-07 13:11:48 -0600[diff] [blame]12#include <dm/acpi.h>
Simon Glass58714162015-04-20 12:37:25 -0600[diff] [blame]13
14#define REG_COUNT 0x80
15
16static int sandbox_rtc_get(struct udevice *dev, struct rtc_time *time)
17{
Rasmus Villemoes9fb6a412020-07-06 22:01:16 +0200[diff] [blame]18 u8 buf[7];
19 int ret;
20
21 ret = dm_i2c_read(dev, REG_SEC, buf, sizeof(buf));
22 if (ret < 0)
23 return ret;
24
25 time->tm_sec = buf[REG_SEC - REG_SEC];
26 time->tm_min = buf[REG_MIN - REG_SEC];
27 time->tm_hour = buf[REG_HOUR - REG_SEC];
28 time->tm_mday = buf[REG_MDAY - REG_SEC];
29 time->tm_mon = buf[REG_MON - REG_SEC];
30 time->tm_year = buf[REG_YEAR - REG_SEC] + 1900;
31 time->tm_wday = buf[REG_WDAY - REG_SEC];
Simon Glass58714162015-04-20 12:37:25 -0600[diff] [blame]32
33 return 0;
34}
35
36static int sandbox_rtc_set(struct udevice *dev, const struct rtc_time *time)
37{
Rasmus Villemoes9fb6a412020-07-06 22:01:16 +0200[diff] [blame]38 u8 buf[7];
Simon Glass58714162015-04-20 12:37:25 -0600[diff] [blame]39 int ret;
40
Rasmus Villemoes9fb6a412020-07-06 22:01:16 +0200[diff] [blame]41 buf[REG_SEC - REG_SEC] = time->tm_sec;
42 buf[REG_MIN - REG_SEC] = time->tm_min;
43 buf[REG_HOUR - REG_SEC] = time->tm_hour;
44 buf[REG_MDAY - REG_SEC] = time->tm_mday;
45 buf[REG_MON - REG_SEC] = time->tm_mon;
46 buf[REG_YEAR - REG_SEC] = time->tm_year - 1900;
47 buf[REG_WDAY - REG_SEC] = time->tm_wday;
48
49 ret = dm_i2c_write(dev, REG_SEC, buf, sizeof(buf));
Simon Glass58714162015-04-20 12:37:25 -0600[diff] [blame]50 if (ret < 0)
51 return ret;
52
53 return 0;
54}
55
56static int sandbox_rtc_reset(struct udevice *dev)
57{
58 return dm_i2c_reg_write(dev, REG_RESET, 0);
59}
60
61static int sandbox_rtc_read8(struct udevice *dev, unsigned int reg)
62{
63 return dm_i2c_reg_read(dev, reg);
64}
65
66static int sandbox_rtc_write8(struct udevice *dev, unsigned int reg, int val)
67{
68 return dm_i2c_reg_write(dev, reg, val);
69}
70
Simon Glass31e17872020-07-07 13:11:48 -0600[diff] [blame]71#if CONFIG_IS_ENABLED(ACPIGEN)
72static int sandbox_rtc_get_name(const struct udevice *dev, char *out_name)
73{
74 return acpi_copy_name(out_name, "RTCC");
75}
76
77struct acpi_ops sandbox_rtc_acpi_ops = {
78 .get_name = sandbox_rtc_get_name,
79};
80#endif
81
Simon Glass58714162015-04-20 12:37:25 -0600[diff] [blame]82static const struct rtc_ops sandbox_rtc_ops = {
83 .get = sandbox_rtc_get,
84 .set = sandbox_rtc_set,
85 .reset = sandbox_rtc_reset,
86 .read8 = sandbox_rtc_read8,
87 .write8 = sandbox_rtc_write8,
88};
89
90static const struct udevice_id sandbox_rtc_ids[] = {
91 { .compatible = "sandbox-rtc" },
92 { }
93};
94
95U_BOOT_DRIVER(rtc_sandbox) = {
96 .name = "rtc-sandbox",
97 .id = UCLASS_RTC,
98 .of_match = sandbox_rtc_ids,
99 .ops = &sandbox_rtc_ops,
Simon Glass31e17872020-07-07 13:11:48 -0600[diff] [blame]100 ACPI_OPS_PTR(&sandbox_rtc_acpi_ops)
Simon Glass58714162015-04-20 12:37:25 -0600[diff] [blame]101};