linux-kernel - Re: [PATCH v2 7/7] clk: ns2: add clock support for Broadcom Northstar 2 SoC

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Date:	Wed, 14 Oct 2015 12:46:19 -0700
From:	Scott Branden <sbranden@...adcom.com>
To:	Arnd Bergmann <arnd@...db.de>, Jon Mason <jonmason@...adcom.com>
CC:	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	Florian Fainelli <f.fainelli@...il.com>,
	"Hauke Mehrtens" <hauke@...ke-m.de>, Ray Jui <rjui@...adcom.com>,
	<linux-clk@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>,
	<bcm-kernel-feedback-list@...adcom.com>
Subject: Re: [PATCH v2 7/7] clk: ns2: add clock support for Broadcom Northstar
 2 SoC

On 15-10-13 03:23 PM, Arnd Bergmann wrote:
> On Tuesday 13 October 2015 18:04:50 Jon Mason wrote:
>>
>>> On a related note, I'm seeing problems when CONFIG_CYGNUS is set but
>>> CONFIG_COMMON_CLK_IPROC is disabled, as that currently leads to a link
>>> failure.
>>
>> I can double check, but it should be on by default when Cygnus is
>> enabled.  If you send me the error, I'll be happy to fix it.
>
>
> The problem is not that it's off by default but that it can be
> disabled, so it breaks some 'make randconfig' builds with this
> message:
>
> drivers/built-in.o: In function `cygnus_armpll_init':
> :(.init.text+0x1d290): undefined reference to `iproc_armpll_setup'
> drivers/built-in.o: In function `cygnus_genpll_clk_init':
> :(.init.text+0x1d2c4): undefined reference to `iproc_pll_clk_setup'
> drivers/built-in.o: In function `cygnus_lcpll0_clk_init':
> :(.init.text+0x1d304): undefined reference to `iproc_pll_clk_setup'
> drivers/built-in.o: In function `cygnus_mipipll_clk_init':
> :(.init.text+0x1d344): undefined reference to `iproc_pll_clk_setup'
> drivers/built-in.o: In function `cygnus_asiu_init':
> :(.init.text+0x1d370): undefined reference to `iproc_asiu_setup'
>
> My patch fixes it by always selecting COMMON_CLK_IPROC from
> ARCH_BCM_CYGNUS. I wasn't sure whether you want COMMON_CLK_IPROC
> to still be user-selectable, so I left that in place. Normally
> I'd expect it to be a silent option though, that just gets
> implicitly enabled whenever a platform that needs it is built
> into the kernel.
COMMON_CLK_IPROC can be a silent option and selected as Arnd has done below.
>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
Acked-by: Scott Branden <sbranden@...adcom.com>

>
> diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig
> index 1319c3c14327..35234e563cd8 100644
> --- a/arch/arm/mach-bcm/Kconfig
> +++ b/arch/arm/mach-bcm/Kconfig
> @@ -29,6 +29,7 @@ config ARCH_BCM_IPROC
>   config ARCH_BCM_CYGNUS
>   	bool "Broadcom Cygnus Support" if ARCH_MULTI_V7
>   	select ARCH_BCM_IPROC
> +	select COMMON_CLK_IPROC
>   	help
>   	  Enable support for the Cygnus family,
>   	  which includes the following variants:
>

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