[PATCH v3 07/16] rtc: parisc: provide rtc_class_ops directly
From: Arnd Bergmann <arnd@arndb.de>
Date: 2016-04-27 22:35:31
Also in:
linux-alpha, linux-arch, linux-rtc, linux-sh, lkml
Subsystem:
parisc architecture, real time clock (rtc) subsystem, the rest · Maintainers:
"James E.J. Bottomley", Helge Deller, Alexandre Belloni, Linus Torvalds
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> --- arch/parisc/kernel/time.c | 36 +++++++++++++++++++++++++++++++++++- drivers/rtc/rtc-generic.c | 3 +-- 2 files changed, 36 insertions(+), 3 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) {
diff --git a/drivers/rtc/rtc-generic.c b/drivers/rtc/rtc-generic.c
index 3958e87a05fa..92b5e02a3750 100644
--- a/drivers/rtc/rtc-generic.c
+++ b/drivers/rtc/rtc-generic.c@@ -9,8 +9,7 @@ #include <linux/platform_device.h> #include <linux/rtc.h> -#if defined(CONFIG_M68K) || defined(CONFIG_PARISC) || \ - defined(CONFIG_PPC) +#if defined(CONFIG_M68K) || defined(CONFIG_PPC) #include <asm/rtc.h> static int generic_get_time(struct device *dev, struct rtc_time *tm)
--
2.7.0