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| author | Arnd Bergmann <arnd@arndb.de> | 2016-05-30 21:57:55 +0300 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2016-06-04 01:23:04 +0300 |
| commit | ca6da801878635bfb851088e1a4eaa3745720582 (patch) | |
| tree | c3a5e2e01e9c5237a60e94bc0db9ff4781693da2 /arch/parisc/kernel/time.c | |
| parent | 7ee942179fd8d485cedaf1875f81c5ee7a3ebeae (diff) | |
| download | linux-ca6da801878635bfb851088e1a4eaa3745720582.tar.xz | |
rtc: parisc: provide rtc_class_ops directly
The rtc-generic driver provides an architecture specific
wrapper on top of the generic rtc_class_ops abstraction,
and on pa-risc, that is implemented using an open-coded
version of rtc_time_to_tm/rtc_tm_to_time.
This changes the parisc rtc-generic device to provide its
rtc_class_ops directly, using the normal helper functions,
which makes this y2038 safe (on 32-bit) and simplifies
the implementation.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Diffstat (limited to 'arch/parisc/kernel/time.c')
| -rw-r--r-- | arch/parisc/kernel/time.c | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/arch/parisc/kernel/time.c b/arch/parisc/kernel/time.c index 58dd6801f5be..744878789752 100644 --- a/arch/parisc/kernel/time.c +++ b/arch/parisc/kernel/time.c @@ -12,6 +12,7 @@ */ #include <linux/errno.h> #include <linux/module.h> +#include <linux/rtc.h> #include <linux/sched.h> #include <linux/kernel.h> #include <linux/param.h> @@ -248,14 +249,47 @@ void __init start_cpu_itimer(void) per_cpu(cpu_data, cpu).it_value = next_tick; } +#if IS_ENABLED(CONFIG_RTC_DRV_GENERIC) +static int rtc_generic_get_time(struct device *dev, struct rtc_time *tm) +{ + struct pdc_tod tod_data; + + memset(tm, 0, sizeof(*tm)); + if (pdc_tod_read(&tod_data) < 0) + return -EOPNOTSUPP; + + /* we treat tod_sec as unsigned, so this can work until year 2106 */ + rtc_time64_to_tm(tod_data.tod_sec, tm); + return rtc_valid_tm(tm); +} + +static int rtc_generic_set_time(struct device *dev, struct rtc_time *tm) +{ + time64_t secs = rtc_tm_to_time64(tm); + + if (pdc_tod_set(secs, 0) < 0) + return -EOPNOTSUPP; + + return 0; +} + +static const struct rtc_class_ops rtc_generic_ops = { + .read_time = rtc_generic_get_time, + .set_time = rtc_generic_set_time, +}; + static int __init rtc_init(void) { struct platform_device *pdev; - pdev = platform_device_register_simple("rtc-generic", -1, NULL, 0); + pdev = platform_device_register_data(NULL, "rtc-generic", -1, + &rtc_generic_ops, + sizeof(rtc_generic_ops)); + return PTR_ERR_OR_ZERO(pdev); } device_initcall(rtc_init); +#endif void read_persistent_clock(struct timespec *ts) { |