linux-kernel - Re: [PATCH] arm: Fix DEBUG_LL for multi-platform kernels (without PL01X)

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Date:	Fri, 4 Apr 2014 15:41:08 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Daniel Thompson <daniel.thompson@...aro.org>
Cc:	patches@...aro.org, linaro-kernel@...ts.linaro.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	spear-devel@...t.st.com
Subject: Re: [PATCH] arm: Fix DEBUG_LL for multi-platform kernels (without
	PL01X)

On Fri, Apr 04, 2014 at 12:17:49PM +0100, Daniel Thompson wrote:
> When building a multi_v7_defconfig kernel it is not possible to configure
> DEBUG_LL to use any serial device except a ARM Primecell PL01X, or more
> accurately and worse, it is possible to configure a different serial
> device but KConfig does not honour this request.
> 
> The happens because the multi-platform mode may include ARCH_SPEAR13XX
> and this forcibly engages DEBUG_UART_PL01X to provide some kind of
> compatibility with single platform builds (SPEAr supports both single and
> multi-platform). This in turn causes DEBUG_LL_INCLUDE to wedge at
> debug/pl01x.S.
> 
> Problem is fixed by only deploying the compatibility options for SPEAr
> when ARCH_MULTIPLATFORM is not set.

I think it's probably about time we killed the def_bool and just made
this a plain 'bool'.  The affected platforms should be using
DEBUG_LL_UART_PL01X by now.

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