linux-kernel - Re: [PATCH] clocksource: whitelist asm9260

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Message-ID: <54EB67FF.5050908@linaro.org>
Date:	Mon, 23 Feb 2015 18:48:47 +0100
From:	Daniel Lezcano <daniel.lezcano@...aro.org>
To:	Guenter Roeck <linux@...ck-us.net>,
	Oleksij Rempel <linux@...pel-privat.de>,
	linux-kernel@...r.kernel.org, tglx@...utronix.de
Subject: Re: [PATCH] clocksource: whitelist asm9260_timer driver for ARM

On 02/18/2015 08:17 AM, Guenter Roeck wrote:
> On 02/10/2015 07:57 AM, Oleksij Rempel wrote:
>> For now it is easier to allow only tested platforms, instead of
>> fighting with different platform specific issues.
>>
>> This patch is fixing compile error on ARCH=SPARC and SPARC64:
>>
>> Building sparc64:allmodconfig ... failed
>> --------------
>> Error log:
>> drivers/built-in.o: In function `asm9260_timer_init':
>> asm9260_timer.c:(.init.text+0x60d4): undefined reference to
>> `of_io_request_and_map'
>>
>> Tested-by: Guenter Roeck <linux@...ck-us.net>
>> Reported-by: Guenter Roeck <linux@...ck-us.net>
>> Signed-off-by: Oleksij Rempel <linux@...pel-privat.de>
>
> The problem solved by this patch has affected linux-next
> for almost a month, the problem is now in mainline, yet
> I have not seen feedback from anyone about it.
>
> Did the patch get lost, or is there some problem with it ?

Hi Guenter, Oleksij,

so I reviewed the patch more in detail.

The sparc/sparc64 configuration shouldn't select this timer.

What do you think about the following patch ?

diff --git a/arch/arm/mach-asm9260/Kconfig b/arch/arm/mach-asm9260/Kconfig
index 8423be7..5224120 100644
--- a/arch/arm/mach-asm9260/Kconfig
+++ b/arch/arm/mach-asm9260/Kconfig
@@ -2,5 +2,7 @@ config MACH_ASM9260
  	bool "Alphascale ASM9260"
  	depends on ARCH_MULTI_V5
  	select CPU_ARM926T
+	select ASM9260_TIMER
+	select GENERIC_CLOCKEVENTS
  	help
  	  Support for Alphascale ASM9260 based platform.
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 72a3827..f9c1995 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -60,6 +60,11 @@ config VT8500_TIMER
  config CADENCE_TTC_TIMER
  	bool

+config ASM9260_TIMER
+	bool
+	select CLKSRC_MMIO
+	select CLKSRC_OF
+
  config CLKSRC_NOMADIK_MTU
  	bool
  	depends on (ARCH_NOMADIK || ARCH_U8500)
@@ -235,15 +240,4 @@ config CLKSRC_MIPS_GIC
  	bool
  	depends on MIPS_GIC
  	select CLKSRC_OF
-
-config ASM9260_TIMER
-	bool "Alphascale ASM9260 timer driver"
-	depends on GENERIC_CLOCKEVENTS
-	select CLKSRC_MMIO
-	select CLKSRC_OF
-	default y if MACH_ASM9260
-	help
-	  This enables build of a clocksource and clockevent driver for
-	  the 32-bit System Timer hardware available on a Alphascale ASM9260.
-
  endmenu





>
>> ---
>>   drivers/clocksource/Kconfig | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
>> index bfaaae4..39d5c11 100644
>> --- a/drivers/clocksource/Kconfig
>> +++ b/drivers/clocksource/Kconfig
>> @@ -231,7 +231,7 @@ config CLKSRC_MIPS_GIC
>>
>>   config ASM9260_TIMER
>>       bool "Alphascale ASM9260 timer driver"
>> -    depends on GENERIC_CLOCKEVENTS
>> +    depends on GENERIC_CLOCKEVENTS && ARM
>>       select CLKSRC_MMIO
>>       select CLKSRC_OF
>>       default y if MACH_ASM9260
>>
>


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