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From: Arnd Bergmann <arnd@arndb.de>
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Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>,
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Subject: Re: [RFC 08/15] rtc: at91sam9: Add missing MFD_SYSCON dependency on HAS_IOMEM
Date: Thu, 03 Mar 2016 11:55:42 +0100
Message-ID: <2233190.1BxevBAvDE@wuerfel>
In-Reply-To: <1456992221-26712-9-git-send-email-k.kozlowski@samsung.com>
References: <1456992221-26712-1-git-send-email-k.kozlowski@samsung.com> <1456992221-26712-9-git-send-email-k.kozlowski@samsung.com>
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On Thursday 03 March 2016 17:03:34 Krzysztof Kozlowski wrote:
> index 0da40e2e4280..5c530b6b125d 100644
> --- a/drivers/rtc/Kconfig
> +++ b/drivers/rtc/Kconfig
> @@ -1302,6 +1302,7 @@ config RTC_DRV_AT91RM9200
>  config RTC_DRV_AT91SAM9
>         tristate "AT91SAM9 RTT as RTC"
>         depends on ARCH_AT91 || COMPILE_TEST
> +       depends on HAS_IOMEM    # For MFD_SYSCON
>         select MFD_SYSCON
>         help
>           Some AT91SAM9 SoCs provide an RTT (Real Time Timer) block which
> 

This is technically correct, but the entire RTC menu is hidden
inside of 'depends on !UML && !S390', so we won't ever get there
on any configuration that does not use HAS_IOMEM.

If we did, all other RTC drivers would also fail.

	Arnd