Re: [PATCH 1/4] ARM: at91: remove at91sam9263 legacy board support

[Paul Bolle <pebolle@tiscali.nl>]

On Wed, 2014-11-19 at 11:31 +0100, Nicolas Ferre wrote:
> Remove legacy support for at91sam9rl 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@atmel.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
4403ac46edcd ("ARM: at91: remove at91sam9263 legacy board support").

>  arch/arm/configs/at91sam9263_defconfig   |  151 ---
>  arch/arm/mach-at91/Kconfig.non_dt        |   21 -
>  arch/arm/mach-at91/Makefile              |    4 -
>  arch/arm/mach-at91/at91sam9263.c         |  399 --------
>  arch/arm/mach-at91/at91sam9263_devices.c | 1538 ------------------------------
>  arch/arm/mach-at91/board-sam9263ek.c     |  493 ----------
>  6 files changed, 2606 deletions(-)
>  delete mode 100644 arch/arm/configs/at91sam9263_defconfig
>  delete mode 100644 arch/arm/mach-at91/at91sam9263_devices.c
>  delete mode 100644 arch/arm/mach-at91/board-sam9263ek.c
> 
>[...]
> diff --git a/arch/arm/mach-at91/at91sam9263_devices.c b/arch/arm/mach-at91/at91sam9263_devices.c
> deleted file mode 100644
> index cef0e2f57068..000000000000
> --- a/arch/arm/mach-at91/at91sam9263_devices.c
> +++ /dev/null
>[...]
> -/* --------------------------------------------------------------------
> - *  RTT
> - * -------------------------------------------------------------------- */
> -
> -static struct resource rtt0_resources[] = {
> -	{
> -		.start	= AT91SAM9263_BASE_RTT0,
> -		.end	= AT91SAM9263_BASE_RTT0 + SZ_16 - 1,
> -		.flags	= IORESOURCE_MEM,
> -	}, {
> -		.flags	= IORESOURCE_MEM,
> -	}, {
> -		.flags  = IORESOURCE_IRQ,
> -	}
> -};
> -
> -static struct platform_device at91sam9263_rtt0_device = {
> -	.name		= "at91_rtt",
> -	.id		= 0,
> -	.resource	= rtt0_resources,
> -};
> -
> -static struct resource rtt1_resources[] = {
> -	{
> -		.start	= AT91SAM9263_BASE_RTT1,
> -		.end	= AT91SAM9263_BASE_RTT1 + SZ_16 - 1,
> -		.flags	= IORESOURCE_MEM,
> -	}, {
> -		.flags	= IORESOURCE_MEM,
> -	}, {
> -		.flags  = IORESOURCE_IRQ,
> -	}
> -};
> -
> -static struct platform_device at91sam9263_rtt1_device = {
> -	.name		= "at91_rtt",
> -	.id		= 1,
> -	.resource	= rtt1_resources,
> -};
> -
> -#if IS_ENABLED(CONFIG_RTC_DRV_AT91SAM9)
> -static void __init at91_add_device_rtt_rtc(void)
> -{
> -	struct platform_device *pdev;
> -	struct resource *r;
> -
> -	switch (CONFIG_RTC_DRV_AT91SAM9_RTT) {

This and...

> -	case 0:
> -		/*
> -		 * The second resource is needed only for the chosen RTT:
> -		 * GPBR will serve as the storage for RTC time offset
> -		 */
> -		at91sam9263_rtt0_device.num_resources = 3;
> -		at91sam9263_rtt1_device.num_resources = 1;
> -		pdev = &at91sam9263_rtt0_device;
> -		r = rtt0_resources;
> -		break;
> -	case 1:
> -		at91sam9263_rtt0_device.num_resources = 1;
> -		at91sam9263_rtt1_device.num_resources = 3;
> -		pdev = &at91sam9263_rtt1_device;
> -		r = rtt1_resources;
> -		break;
> -	default:
> -		pr_err("at91sam9263: only supports 2 RTT (%d)\n",
> -		       CONFIG_RTC_DRV_AT91SAM9_RTT);

this are the only places were the Kconfig symbol RTC_DRV_AT91SAM9_RTT
was used. It is useless now. That matches its help text, that reads:
    This option is only relevant for legacy board support and
    won't be used when booting a DT board.

> -		return;
> -	}
> -
> -	pdev->name = "rtc-at91sam9";
> -	r[1].start = AT91SAM9263_BASE_GPBR + 4 * CONFIG_RTC_DRV_AT91SAM9_GPBR;
> -	r[1].end = r[1].start + 3;
> -	r[2].start = NR_IRQS_LEGACY + AT91_ID_SYS;
> -	r[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 */
> -	at91sam9263_rtt0_device.num_resources = 1;
> -	at91sam9263_rtt1_device.num_resources = 1;
> -}
> -#endif
> -
> -static void __init at91_add_device_rtt(void)
> -{
> -	at91_add_device_rtt_rtc();
> -	platform_device_register(&at91sam9263_rtt0_device);
> -	platform_device_register(&at91sam9263_rtt1_device);
> -}

Is a patch to remove that symbol from drivers/rtc/Kconfig queued
somewhere?


Paul Bolle