diff options
Diffstat (limited to 'drivers/rtc/rtc-r9701.c')
| -rw-r--r-- | drivers/rtc/rtc-r9701.c | 56 |
1 files changed, 8 insertions, 48 deletions
diff --git a/drivers/rtc/rtc-r9701.c b/drivers/rtc/rtc-r9701.c index 83d2bcca6a8f..60a3c3d7499b 100644 --- a/drivers/rtc/rtc-r9701.c +++ b/drivers/rtc/rtc-r9701.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Driver for Epson RTC-9701JE * @@ -7,10 +8,6 @@ * * Copyright (C) 2006 8D Technologies inc. * Copyright (C) 2004 Compulab Ltd. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include <linux/module.h> @@ -78,8 +75,6 @@ static int r9701_get_datetime(struct device *dev, struct rtc_time *dt) if (ret) return ret; - memset(dt, 0, sizeof(*dt)); - dt->tm_sec = bcd2bin(buf[0]); /* RSECCNT */ dt->tm_min = bcd2bin(buf[1]); /* RMINCNT */ dt->tm_hour = bcd2bin(buf[2]); /* RHRCNT */ @@ -88,20 +83,12 @@ static int r9701_get_datetime(struct device *dev, struct rtc_time *dt) dt->tm_mon = bcd2bin(buf[4]) - 1; /* RMONCNT */ dt->tm_year = bcd2bin(buf[5]) + 100; /* RYRCNT */ - /* the rtc device may contain illegal values on power up - * according to the data sheet. make sure they are valid. - */ - - return rtc_valid_tm(dt); + return 0; } static int r9701_set_datetime(struct device *dev, struct rtc_time *dt) { - int ret, year; - - year = dt->tm_year + 1900; - if (year >= 2100 || year < 2000) - return -EINVAL; + int ret; ret = write_reg(dev, RHRCNT, bin2bcd(dt->tm_hour)); ret = ret ? ret : write_reg(dev, RMINCNT, bin2bcd(dt->tm_min)); @@ -109,7 +96,6 @@ static int r9701_set_datetime(struct device *dev, struct rtc_time *dt) ret = ret ? ret : write_reg(dev, RDAYCNT, bin2bcd(dt->tm_mday)); ret = ret ? ret : write_reg(dev, RMONCNT, bin2bcd(dt->tm_mon + 1)); ret = ret ? ret : write_reg(dev, RYRCNT, bin2bcd(dt->tm_year - 100)); - ret = ret ? ret : write_reg(dev, RWKCNT, 1 << dt->tm_wday); return ret; } @@ -122,7 +108,6 @@ static const struct rtc_class_ops r9701_rtc_ops = { static int r9701_probe(struct spi_device *spi) { struct rtc_device *rtc; - struct rtc_time dt; unsigned char tmp; int res; @@ -133,40 +118,16 @@ static int r9701_probe(struct spi_device *spi) return -ENODEV; } - /* - * The device seems to be present. Now check if the registers - * contain invalid values. If so, try to write a default date: - * 2000/1/1 00:00:00 - */ - if (r9701_get_datetime(&spi->dev, &dt)) { - dev_info(&spi->dev, "trying to repair invalid date/time\n"); - dt.tm_sec = 0; - dt.tm_min = 0; - dt.tm_hour = 0; - dt.tm_mday = 1; - dt.tm_mon = 0; - dt.tm_year = 100; - - if (r9701_set_datetime(&spi->dev, &dt) || - r9701_get_datetime(&spi->dev, &dt)) { - dev_err(&spi->dev, "cannot repair RTC register\n"); - return -ENODEV; - } - } - - rtc = devm_rtc_device_register(&spi->dev, "r9701", - &r9701_rtc_ops, THIS_MODULE); + rtc = devm_rtc_allocate_device(&spi->dev); if (IS_ERR(rtc)) return PTR_ERR(rtc); spi_set_drvdata(spi, rtc); + rtc->ops = &r9701_rtc_ops; + rtc->range_min = RTC_TIMESTAMP_BEGIN_2000; + rtc->range_max = RTC_TIMESTAMP_END_2099; - return 0; -} - -static int r9701_remove(struct spi_device *spi) -{ - return 0; + return devm_rtc_register_device(rtc); } static struct spi_driver r9701_driver = { @@ -174,7 +135,6 @@ static struct spi_driver r9701_driver = { .name = "rtc-r9701", }, .probe = r9701_probe, - .remove = r9701_remove, }; module_spi_driver(r9701_driver); |