[PATCH v3 09/16] rtc: m68k: provide rtc_class_ops directly

Arnd Bergmann
2016-04-27T22:34:23Z

The rtc-generic driver provides an architecture specific
wrapper on top of the generic rtc_class_ops abstraction,
and m68k has another abstraction on top, which is a bit
silly.

This changes the m68k rtc-generic device to provide its
rtc_class_ops directly, to reduce the number of layers
by one.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
arch/m68k/kernel/time.c | 24 ++++++++++++++++++++++--
drivers/rtc/rtc-generic.c | 2 +-
2 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/arch/m68k/kernel/time.c b/arch/m68k/kernel/time.c
index 3857737e3958..80e024a10115 100644
--- a/arch/m68k/kernel/time.c
+++ b/arch/m68k/kernel/time.c
@@ -86,7 +86,24 @@ void read_persistent_clock(struct timespec *ts)
}
}

-#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET
+#if defined(CONFIG_ARCH_USES_GETTIMEOFFSET) && IS_ENABLED(CONFIG_RTC_DRV_GENERIC)
+static int rtc_generic_get_time(struct device *dev, struct rtc_time *tm)
+{
+ mach_hwclk(0, tm);
+ return rtc_valid_tm(tm);
+}
+
+static int rtc_generic_set_time(struct device *dev, struct rtc_time *tm)
+{
+ if (mach_hwclk(1, tm) < 0)
+ return -EOPNOTSUPP;
+ return 0;
+}
+
+static const struct rtc_class_ops generic_rtc_ops = {
+ .read_time = rtc_generic_get_time,
+ .set_time = rtc_generic_set_time,
+};

static int __init rtc_init(void)
{
@@ -95,7 +112,10 @@ static int __init rtc_init(void)
if (!mach_hwclk)
return -ENODEV;

- pdev = platform_device_register_simple("rtc-generic", -1, NULL, 0);
+ /* or just call devm_rtc_device_register instead? */
+ pdev = platform_device_register_data(NULL, "rtc-generic", -1,
+ &generic_rtc_ops,
+ sizeof(generic_rtc_ops));
return PTR_ERR_OR_ZERO(pdev);
}

diff --git a/drivers/rtc/rtc-generic.c b/drivers/rtc/rtc-generic.c
index 92b5e02a3750..5c82bae73b9c 100644
--- a/drivers/rtc/rtc-generic.c
+++ b/drivers/rtc/rtc-generic.c
@@ -9,7 +9,7 @@
#include <linux/platform_device.h>
#include <linux/rtc.h>

-#if defined(CONFIG_M68K) || defined(CONFIG_PPC)
+#if defined(CONFIG_PPC)
#include <asm/rtc.h>

static int generic_get_time(struct device *dev, struct rtc_time *tm)
--
2.7.0