linux-kernel - Re: [PATCH 1/2] ARM: at91: remove at91sam9261/at91sam9g10 legacy board support

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Date:	Mon, 1 Dec 2014 17:10:24 +0100
From:	Nicolas Ferre <nicolas.ferre@...el.com>
To:	Paul Bolle <pebolle@...cali.nl>,
	Boris BREZILLON <boris.brezillon@...e-electrons.com>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
CC:	Valentin Rothberg <valentinrothberg@...il.com>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>,
	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
Subject: Re: [PATCH 1/2] ARM: at91: remove at91sam9261/at91sam9g10 legacy
 board support

Le 01/12/2014 12:56, Paul Bolle a écrit :
> On Fri, 2014-11-21 at 12:27 +0100, Nicolas Ferre wrote:
>> Remove legacy support for at91sam9261/at91sam9g10 boards.
>> This include board files removal plus all legacy code for non DT boards
>> support.
>> Use the Device Tree for running this board with newer kernels.
>>
>> Signed-off-by: Nicolas Ferre <nicolas.ferre@...el.com>
>> ---
> 
> There's some further cleanup possible after this patch. I noticed that
> when it landed in today's linux-next (ie, next-20141201) as commit
> 2e591e7b3ac2 ("ARM: at91: remove at91sam9261/at91sam9g10 legacy board
> support").
> 
>>  arch/arm/configs/at91sam9261_9g10_defconfig |  147 ----
>>  arch/arm/mach-at91/Kconfig.non_dt           |   34 -
>>  arch/arm/mach-at91/Makefile                 |    5 -
>>  arch/arm/mach-at91/at91sam9261.c            |  375 ---------
>>  arch/arm/mach-at91/at91sam9261_devices.c    | 1098 ---------------------------
>>  arch/arm/mach-at91/board-sam9261ek.c        |  623 ---------------
>>  6 files changed, 2282 deletions(-)
>>  delete mode 100644 arch/arm/configs/at91sam9261_9g10_defconfig
>>  delete mode 100644 arch/arm/mach-at91/at91sam9261_devices.c
>>  delete mode 100644 arch/arm/mach-at91/board-sam9261ek.c
>>
>> [...]
>> diff --git a/arch/arm/mach-at91/at91sam9261_devices.c b/arch/arm/mach-at91/at91sam9261_devices.c
>> deleted file mode 100644
>> index 29baacb5c359..000000000000
>> --- a/arch/arm/mach-at91/at91sam9261_devices.c
>> +++ /dev/null
>> [...]
>> -/* --------------------------------------------------------------------
>> - *  RTT
>> - * -------------------------------------------------------------------- */
>> -
>> -static struct resource rtt_resources[] = {
>> -	{
>> -		.start	= AT91SAM9261_BASE_RTT,
>> -		.end	= AT91SAM9261_BASE_RTT + SZ_16 - 1,
>> -		.flags	= IORESOURCE_MEM,
>> -	}, {
>> -		.flags	= IORESOURCE_MEM,
>> -	}, {
>> -		.flags  = IORESOURCE_IRQ,
>> -	}
>> -};
>> -
>> -static struct platform_device at91sam9261_rtt_device = {
>> -	.name		= "at91_rtt",
>> -	.id		= 0,
>> -	.resource	= rtt_resources,
>> -};
>> -
>> -#if IS_ENABLED(CONFIG_RTC_DRV_AT91SAM9)
>> -static void __init at91_add_device_rtt_rtc(void)
>> -{
>> -	at91sam9261_rtt_device.name = "rtc-at91sam9";
>> -	/*
>> -	 * The second resource is needed:
>> -	 * GPBR will serve as the storage for RTC time offset
>> -	 */
>> -	at91sam9261_rtt_device.num_resources = 3;
>> -	rtt_resources[1].start = AT91SAM9261_BASE_GPBR +
>> -				 4 * CONFIG_RTC_DRV_AT91SAM9_GPBR;
> 
> This was the only place where the Kconfig symbol RTC_DRV_AT91SAM9_GPBR
> was used. That again matches its help text:
>     This option is only relevant for legacy board support and
>     won't be used when booting a DT board.
> 
>> -	rtt_resources[1].end = rtt_resources[1].start + 3;
>> -	rtt_resources[2].start = NR_IRQS_LEGACY + AT91_ID_SYS;
>> -	rtt_resources[2].end = NR_IRQS_LEGACY + AT91_ID_SYS;
>> -}
>> -#else
>> -static void __init at91_add_device_rtt_rtc(void)
>> -{
>> -	/* Only one resource is needed: RTT not used as RTC */
>> -	at91sam9261_rtt_device.num_resources = 1;
>> -}
>> -#endif
>> -
>> -static void __init at91_add_device_rtt(void)
>> -{
>> -	at91_add_device_rtt_rtc();
>> -	platform_device_register(&at91sam9261_rtt_device);
>> -}
> 
> Is a patch to also remove that symbol from drivers/rtc/Kconfig queued
> somewhere?

Yes, we are in the same situation as the at91sam9263. We will certainly
remove them during the 3.19-rc phase.

Tanks, best regards,
-- 
Nicolas Ferre
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