linux-kernel - Re: [PATCH] blackfin: Kconfig: Let PLL_BYPASS and MPU depend on some BF

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Date:	Sat, 4 Apr 2015 00:59:19 +0200
From:	Richard Weinberger <richard.weinberger@...il.com>
To:	Chen Gang <xili_gchen_5257@...mail.com>
Cc:	"realmz6@...il.com" <realmz6@...il.com>,
	"adi-buildroot-devel@...ts.sourceforge.net" 
	<adi-buildroot-devel@...ts.sourceforge.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] blackfin: Kconfig: Let PLL_BYPASS and MPU depend on some
 BF_REV of BF533

On Thu, Apr 2, 2015 at 11:25 PM, Chen Gang <xili_gchen_5257@...mail.com> wrote:
> For allmodconfig, it uses BF533 which will cause 3 issues for common
> checking:
>
>  - The first 2 issues are about PLL_BYPASS, it needs BF_REV_0_6 (which
>    just match the compiler's output for __SILICON_REVISION__).
>
>  - The last issue is about MPU, it needs BF_REV_0_5 or BF_REV_0_6 (which
>    just match the compiler's output for __SILICON_REVISION__).
>
> The related error with allmodconfig:
>
>     CC      arch/blackfin/mach-common/arch_checks.o
>   arch/blackfin/mach-common/arch_checks.c:24:3: error: #error "Sclk value selected is less than minimum. Please select a proper value for SCLK multiplier"
>    # error "Sclk value selected is less than minimum. Please select a proper value for SCLK multiplier"
>      ^
>   arch/blackfin/mach-common/arch_checks.c:28:3: error: #error "ANOMALY 05000273, please make sure CCLK is at least 2x SCLK"
>    # error "ANOMALY 05000273, please make sure CCLK is at least 2x SCLK"
>      ^
>   arch/blackfin/mach-common/arch_checks.c:51:3: error: #error the MPU will not function safely while Anomaly 05000263 applies
>    # error the MPU will not function safely while Anomaly 05000263 applies
>      ^
>
>  config PLL_BYPASS
>         bool "Bypass PLL"
> -       depends on BFIN_KERNEL_CLOCK && (!BF60x)
> +       depends on BFIN_KERNEL_CLOCK && (!BF60x) && ((!BF533) || BF_REV_0_6)
>         default n
>
>  config CLKIN_HALF
> @@ -1112,6 +1112,7 @@ endchoice
>  comment "Memory Protection Unit"
>  config MPU
>         bool "Enable the memory protection unit"
> +       depends on (!BF533) || BF_REV_0_6 || BF_REV_0_5
>         default n
>         help
>           Use the processor's MPU to protect applications from accessing

This answers my question wrt. allmodconfig. ;)
I'm not sure if this is the correct way. Isn't this the reason why we
have COMPILE_TEST?

-- 
Thanks,
//richard
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