diff options
Diffstat (limited to 'arch/sh/boards/mach-dreamcast/rtc.c')
| -rw-r--r-- | arch/sh/boards/mach-dreamcast/rtc.c | 49 |
1 files changed, 32 insertions, 17 deletions
diff --git a/arch/sh/boards/mach-dreamcast/rtc.c b/arch/sh/boards/mach-dreamcast/rtc.c index 061d65714fcc..7873cd27e4e0 100644 --- a/arch/sh/boards/mach-dreamcast/rtc.c +++ b/arch/sh/boards/mach-dreamcast/rtc.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * arch/sh/boards/dreamcast/rtc.c * @@ -5,14 +6,12 @@ * * Copyright (c) 2001, 2002 M. R. Brown <mrbrown@0xd6.org> * Copyright (c) 2002 Paul Mundt <lethal@chaoticdreams.org> - * - * Released under the terms of the GNU GPL v2.0. - * */ #include <linux/time.h> -#include <asm/rtc.h> -#include <asm/io.h> +#include <linux/rtc.h> +#include <linux/io.h> +#include <linux/platform_device.h> /* The AICA RTC has an Epoch of 1/1/1950, so we must subtract 20 years (in seconds) to get the standard Unix Epoch when getting the time, and add @@ -26,13 +25,15 @@ /** * aica_rtc_gettimeofday - Get the time from the AICA RTC - * @ts: pointer to resulting timespec + * @dev: the RTC device (ignored) + * @tm: pointer to resulting RTC time structure * * Grabs the current RTC seconds counter and adjusts it to the Unix Epoch. */ -static void aica_rtc_gettimeofday(struct timespec *ts) +static int aica_rtc_gettimeofday(struct device *dev, struct rtc_time *tm) { unsigned long val1, val2; + time64_t t; do { val1 = ((__raw_readl(AICA_RTC_SECS_H) & 0xffff) << 16) | @@ -42,22 +43,26 @@ static void aica_rtc_gettimeofday(struct timespec *ts) (__raw_readl(AICA_RTC_SECS_L) & 0xffff); } while (val1 != val2); - ts->tv_sec = val1 - TWENTY_YEARS; + /* normalize to 1970..2106 time range */ + t = (u32)(val1 - TWENTY_YEARS); - /* Can't get nanoseconds with just a seconds counter. */ - ts->tv_nsec = 0; + rtc_time64_to_tm(t, tm); + + return 0; } /** * aica_rtc_settimeofday - Set the AICA RTC to the current time - * @secs: contains the time_t to set + * @dev: the RTC device (ignored) + * @tm: pointer to new RTC time structure * * Adjusts the given @tv to the AICA Epoch and sets the RTC seconds counter. */ -static int aica_rtc_settimeofday(const time_t secs) +static int aica_rtc_settimeofday(struct device *dev, struct rtc_time *tm) { unsigned long val1, val2; - unsigned long adj = secs + TWENTY_YEARS; + time64_t secs = rtc_tm_to_time64(tm); + u32 adj = secs + TWENTY_YEARS; do { __raw_writel((adj & 0xffff0000) >> 16, AICA_RTC_SECS_H); @@ -73,9 +78,19 @@ static int aica_rtc_settimeofday(const time_t secs) return 0; } -void aica_time_init(void) +static const struct rtc_class_ops rtc_generic_ops = { + .read_time = aica_rtc_gettimeofday, + .set_time = aica_rtc_settimeofday, +}; + +static int __init aica_time_init(void) { - rtc_sh_get_time = aica_rtc_gettimeofday; - rtc_sh_set_time = aica_rtc_settimeofday; -} + struct platform_device *pdev; + pdev = platform_device_register_data(NULL, "rtc-generic", -1, + &rtc_generic_ops, + sizeof(rtc_generic_ops)); + + return PTR_ERR_OR_ZERO(pdev); +} +arch_initcall(aica_time_init); |