| Simon Glass | 5871416 | 2015-04-20 12:37:25 -0600 | [diff] [blame] | 1 | /* |
| 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 | |
| 16 | static 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 | |
| 44 | static 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 | |
| 73 | static int sandbox_rtc_reset(struct udevice *dev) |
| 74 | { |
| 75 | return dm_i2c_reg_write(dev, REG_RESET, 0); |
| 76 | } |
| 77 | |
| 78 | static int sandbox_rtc_read8(struct udevice *dev, unsigned int reg) |
| 79 | { |
| 80 | return dm_i2c_reg_read(dev, reg); |
| 81 | } |
| 82 | |
| 83 | static int sandbox_rtc_write8(struct udevice *dev, unsigned int reg, int val) |
| 84 | { |
| 85 | return dm_i2c_reg_write(dev, reg, val); |
| 86 | } |
| 87 | |
| 88 | static 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 | |
| 96 | static const struct udevice_id sandbox_rtc_ids[] = { |
| 97 | { .compatible = "sandbox-rtc" }, |
| 98 | { } |
| 99 | }; |
| 100 | |
| 101 | U_BOOT_DRIVER(rtc_sandbox) = { |
| 102 | .name = "rtc-sandbox", |
| 103 | .id = UCLASS_RTC, |
| 104 | .of_match = sandbox_rtc_ids, |
| 105 | .ops = &sandbox_rtc_ops, |
| 106 | }; |