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git01.mediatek.com / filogic / uboot / 413c7b300d534f242ae6562f4728f028520f203e / . / drivers / rtc / sandbox_rtc.c
blob: 4404501c2f65c3ac0ac2409bf8752d353bd93857 [file] [log] [blame]
Tom Rini10e47792018-05-06 17:58:06 -0400[diff] [blame]1// SPDX-License-Identifier: GPL-2.0+
Simon Glassc2a8c062015-04-20 12:37:25 -0600[diff] [blame]2/*
3 * (C) Copyright 2015 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
Simon Glassc2a8c062015-04-20 12:37:25 -0600[diff] [blame]5 */
6
Simon Glassc2a8c062015-04-20 12:37:25 -0600[diff] [blame]7#include <dm.h>
8#include <i2c.h>
9#include <rtc.h>
10#include <asm/rtc.h>
Simon Glass39ab8672020-07-07 13:11:48 -0600[diff] [blame]11#include <dm/acpi.h>
Simon Glassc2a8c062015-04-20 12:37:25 -0600[diff] [blame]12
13#define REG_COUNT 0x80
14
15static int sandbox_rtc_get(struct udevice *dev, struct rtc_time *time)
16{
Rasmus Villemoesacffbea2020-07-06 22:01:16 +0200[diff] [blame]17 u8 buf[7];
18 int ret;
19
20 ret = dm_i2c_read(dev, REG_SEC, buf, sizeof(buf));
21 if (ret < 0)
22 return ret;
23
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];
Simon Glassc2a8c062015-04-20 12:37:25 -0600[diff] [blame]31
32 return 0;
33}
34
35static int sandbox_rtc_set(struct udevice *dev, const struct rtc_time *time)
36{
Rasmus Villemoesacffbea2020-07-06 22:01:16 +0200[diff] [blame]37 u8 buf[7];
Simon Glassc2a8c062015-04-20 12:37:25 -0600[diff] [blame]38 int ret;
39
Rasmus Villemoesacffbea2020-07-06 22:01:16 +0200[diff] [blame]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;
47
48 ret = dm_i2c_write(dev, REG_SEC, buf, sizeof(buf));
Simon Glassc2a8c062015-04-20 12:37:25 -0600[diff] [blame]49 if (ret < 0)
50 return ret;
51
52 return 0;
53}
54
55static int sandbox_rtc_reset(struct udevice *dev)
56{
57 return dm_i2c_reg_write(dev, REG_RESET, 0);
58}
59
60static int sandbox_rtc_read8(struct udevice *dev, unsigned int reg)
61{
62 return dm_i2c_reg_read(dev, reg);
63}
64
65static int sandbox_rtc_write8(struct udevice *dev, unsigned int reg, int val)
66{
67 return dm_i2c_reg_write(dev, reg, val);
68}
69
Simon Glass39ab8672020-07-07 13:11:48 -0600[diff] [blame]70#if CONFIG_IS_ENABLED(ACPIGEN)
71static int sandbox_rtc_get_name(const struct udevice *dev, char *out_name)
72{
73 return acpi_copy_name(out_name, "RTCC");
74}
75
76struct acpi_ops sandbox_rtc_acpi_ops = {
77 .get_name = sandbox_rtc_get_name,
78};
79#endif
80
Simon Glass65cb7592021-03-15 17:25:30 +1300[diff] [blame]81static int sandbox_rtc_bind(struct udevice *dev)
82{
83#if CONFIG_IS_ENABLED(PLATDATA)
84 struct sandbox_i2c_rtc_plat_data *plat = dev_get_plat(dev);
85
86 /* Set up the emul_idx for i2c_emul_find() */
87 i2c_emul_set_idx(dev, plat->dtplat.sandbox_emul->idx);
88#endif
89
90 return 0;
91}
92
Simon Glassc2a8c062015-04-20 12:37:25 -0600[diff] [blame]93static const struct rtc_ops sandbox_rtc_ops = {
94 .get = sandbox_rtc_get,
95 .set = sandbox_rtc_set,
96 .reset = sandbox_rtc_reset,
97 .read8 = sandbox_rtc_read8,
98 .write8 = sandbox_rtc_write8,
99};
100
101static const struct udevice_id sandbox_rtc_ids[] = {
102 { .compatible = "sandbox-rtc" },
103 { }
104};
105
Simon Glass4d4558e2020-10-03 11:31:36 -0600[diff] [blame]106U_BOOT_DRIVER(sandbox_rtc) = {
107 .name = "sandbox_rtc",
Simon Glassc2a8c062015-04-20 12:37:25 -0600[diff] [blame]108 .id = UCLASS_RTC,
109 .of_match = sandbox_rtc_ids,
110 .ops = &sandbox_rtc_ops,
Simon Glass65cb7592021-03-15 17:25:30 +1300[diff] [blame]111 .bind = sandbox_rtc_bind,
Simon Glass39ab8672020-07-07 13:11:48 -0600[diff] [blame]112 ACPI_OPS_PTR(&sandbox_rtc_acpi_ops)
Simon Glassc2a8c062015-04-20 12:37:25 -0600[diff] [blame]113};