linux-kernel - Re: [PATCH 2/2] pwm: Enable compile testing for some of drivers

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Date:   Tue, 7 Jan 2020 08:26:45 +0100
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        linux-pwm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        bcm-kernel-feedback-list@...adcom.com,
        linux-rpi-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org,
        linux-riscv@...ts.infradead.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-tegra@...r.kernel.org
Subject: Re: [PATCH 2/2] pwm: Enable compile testing for some of drivers

Hello Krzysztof,

On Mon, Dec 30, 2019 at 06:21:13PM +0100, Krzysztof Kozlowski wrote:
> Some of the PWM drivers can be compile tested to increase build
> coverage.
> 
> The Meson PWM driver requires COMMON_CLK dependency.

I'm surprised that there are not more that need this. Is HAVE_CLK not
enough?

Also HAS_IOMEM is a typical requirement, but I tested with an ARCH=um
config (which does't have HAS_IOMEM) and they all compile fine.

> @@ -318,7 +319,7 @@ config PWM_MEDIATEK
>  
>  config PWM_MXS
>  	tristate "Freescale MXS PWM support"
> -	depends on ARCH_MXS && OF
> +	depends on (ARCH_MXS && OF) || COMPILE_TEST
>  	select STMP_DEVICE
>  	help
>  	  Generic PWM framework driver for Freescale MXS.
> @@ -328,7 +329,8 @@ config PWM_MXS
>  
>  config PWM_OMAP_DMTIMER
>  	tristate "OMAP Dual-Mode Timer PWM support"
> -	depends on OF && ARCH_OMAP && OMAP_DM_TIMER
> +	depends on (ARCH_OMAP && OMAP_DM_TIMER) || COMPILE_TEST
> +	depends on OF

I'm surprised that OF isn't required for PWM_MXS but is is for
PWM_OMAP_DMTIMER. pwm-mxs compiles without CONFIG_OF, didn't test
pwm-omap-dmtimer.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |    | https://www.pengutronix.de/ |