[PATCH 2/2] pwm: Enable compile testing for some of drivers
krzk at kernel.org
Tue Jan 7 00:25:39 PST 2020
On Tue, Jan 07, 2020 at 08:26:45AM +0100, Uwe Kleine-König wrote:
> 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
Nope. E.g. for alpha architecture, HAVE_CLK is not set and without
drivers/pwm/pwm-meson.o: In function `meson_pwm_init_channels':
(.text+0x244): undefined reference to `devm_clk_register'
I guess other solution would be to add stubs for few clk functions...
> 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.
Because of !HAS_IOMEM, since some time ARCH=um does not support
COMPILE_TEST. Therefore HAS_IOMEM dependency is not needed for compile
testing (and for regular build it is selected by ARCH).
> > @@ -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
Since some time !OF has all necessary stubs so OF is actually needed
only for binding, not compiling.
More information about the linux-arm-kernel