linux-kernel - Re: [PATCH] clk: samsung: allow building the clkout driver as module

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Message-ID: <92ccc476-6afd-4be9-7c72-40c9a9218b03@kernel.org>
Date:   Thu, 12 Nov 2020 15:36:35 +0100
From:   Sylwester Nawrocki <snawrocki@...nel.org>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Tomasz Figa <tomasz.figa@...il.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        linux-samsung-soc@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] clk: samsung: allow building the clkout driver as module

On 11/10/20 20:37, Krzysztof Kozlowski wrote:
> The Exynos clock output driver can be built as module (it does not have
> to be part of core init process) for better customization.  Adding a
> KConfig entry allows also compile testing for build coverage.
> 
> Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>

This needs to go through your tree due to dependencies on your previous
patches, so

Acked-by: Sylwester Nawrocki <s.nawrocki@...sung.com>

> ---
>   drivers/clk/samsung/Kconfig             | 10 ++++++++++
>   drivers/clk/samsung/Makefile            |  2 +-
>   drivers/clk/samsung/clk-exynos-clkout.c |  1 +
>   3 files changed, 12 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/clk/samsung/Kconfig b/drivers/clk/samsung/Kconfig
> index 57d4b3f20417..b6b2cb209543 100644
> --- a/drivers/clk/samsung/Kconfig
> +++ b/drivers/clk/samsung/Kconfig
> @@ -19,6 +19,16 @@ config EXYNOS_AUDSS_CLK_CON
>   	  on some Exynos SoC variants. Choose M or Y here if you want to
>   	  use audio devices such as I2S, PCM, etc.
>   
> +config EXYNOS_CLK_OUT

Perhaps change it EXYNOS_CLKOUT for a better match with the SoC documentation? 

> +	tristate "Samsung Exynos clock output driver"
> +	depends on COMMON_CLK_SAMSUNG
> +	default y if ARCH_EXYNOS
> +	help
> +	  Support for the clock output (XCLKOUT) driver present on some of
> +	  Exynos SoC variants. Usually the XCLKOUT is used to monitor the
> +	  status of the certains clocks from SoC, but it could also be tied to
> +	  other devices as an input clock.

> diff --git a/drivers/clk/samsung/Makefile b/drivers/clk/samsung/Makefile
> index 1a4e6b787978..4adbf972e9f6 100644
> --- a/drivers/clk/samsung/Makefile
> +++ b/drivers/clk/samsung/Makefile
> @@ -15,7 +15,7 @@ obj-$(CONFIG_SOC_EXYNOS5420)	+= clk-exynos5420.o
>   obj-$(CONFIG_SOC_EXYNOS5420)	+= clk-exynos5-subcmu.o
>   obj-$(CONFIG_EXYNOS_ARM64_COMMON_CLK)	+= clk-exynos5433.o
>   obj-$(CONFIG_EXYNOS_AUDSS_CLK_CON) += clk-exynos-audss.o
> -obj-$(CONFIG_ARCH_EXYNOS)	+= clk-exynos-clkout.o
> +obj-$(CONFIG_EXYNOS_CLK_OUT)	+= clk-exynos-clkout.o

--
Regards,
Sylwester