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[PATCH 3/6] powerpc: rtc: provide rtc_class_ops directly

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  [PATCH 3/6] powerpc: rtc: provide rtc_class_ops directly Arnd Bergmann <arnd@arndb.de> - 2016-03-01 18:10 +0100
    Re: [PATCH 3/6] powerpc: rtc: provide rtc_class_ops directly kbuild test robot <lkp@intel.com> - 2016-03-01 19:40 +0100
      Re: [PATCH 3/6] powerpc: rtc: provide rtc_class_ops directly Arnd Bergmann <arnd@arndb.de> - 2016-03-01 21:40 +0100

#1346773 — [PATCH 3/6] powerpc: rtc: provide rtc_class_ops directly

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

This changes the powerpc 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/powerpc/kernel/time.c | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 81b0900a39ee..84a1228be617 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -1080,6 +1080,28 @@ void calibrate_delay(void)
 	loops_per_jiffy = tb_ticks_per_jiffy;
 }
 
+static int rtc_generic_get_time(struct device *dev, struct rtc_time *tm)
+{
+	ppc_md.get_rtc_time(tm);
+	return rtc_valid_tm(tm);
+}
+
+static int rtc_generic_set_time(struct device *dev, struct rtc_time *tm)
+{
+	if (!ppc_md.set_rtc_time)
+		return -EOPNOTSUPP;
+
+	if (ppc_md.set_rtc_time(tm) < 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;
@@ -1087,7 +1109,9 @@ static int __init rtc_init(void)
 	if (!ppc_md.get_rtc_time)
 		return -ENODEV;
 
-	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);
 }
-- 
2.7.0

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#1346870

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Hi Arnd,

[auto build test ERROR on abelloni/rtc-next]
[also build test ERROR on v4.5-rc6 next-20160301]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/Arnd-Bergmann/rtc-generic-follow-up-for-COMPILE_TEST/20160302-011032
base:   https://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux.git rtc-next
config: powerpc-allnoconfig (attached as .config)
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=powerpc 

All errors (new ones prefixed by >>):

   arch/powerpc/kernel/built-in.o: In function `rtc_generic_get_time':
>> time.c:(.text+0x4c58): undefined reference to `rtc_valid_tm'

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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#1347010

On Wednesday 02 March 2016 02:37:14 kbuild test robot wrote:
> [auto build test ERROR on abelloni/rtc-next]
> [also build test ERROR on v4.5-rc6 next-20160301]
> [if your patch is applied to the wrong git tree, please drop us a note to help improving the system]
> 
> url:    https://github.com/0day-ci/linux/commits/Arnd-Bergmann/rtc-generic-follow-up-for-COMPILE_TEST/20160302-011032
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux.git rtc-next
> config: powerpc-allnoconfig (attached as .config)
> reproduce:
>         wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # save the attached .config to linux build tree
>         make.cross ARCH=powerpc 
> 
> All errors (new ones prefixed by >>):
> 
>    arch/powerpc/kernel/built-in.o: In function `rtc_generic_get_time':
> >> time.c:(.text+0x4c58): undefined reference to `rtc_valid_tm'
> 

I fixed up the powerpc and parisc patches now, will resend them
after getting some feedback on the overall approach.

	Arnd

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