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Message-ID: <20230717074352.dz3ex7fwi77loayc@pengutronix.de>
Date: Mon, 17 Jul 2023 09:43:52 +0200
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: Rob Herring <robh@...nel.org>
Cc: Thierry Reding <thierry.reding@...il.com>,
Hector Martin <marcan@...can.st>,
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chrome-platform@...ts.linux.dev, devicetree@...r.kernel.org,
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Subject: Re: [PATCH] pwm: Explicitly include correct DT includes
On Fri, Jul 14, 2023 at 11:48:50AM -0600, Rob Herring wrote:
> The DT of_device.h and of_platform.h date back to the separate
> of_platform_bus_type before it as merged into the regular platform bus.
> As part of that merge prepping Arm DT support 13 years ago, they
> "temporarily" include each other. They also include platform_device.h
> and of.h. As a result, there's a pretty much random mix of those include
> files used throughout the tree. In order to detangle these headers and
> replace the implicit includes with struct declarations, users need to
> explicitly include the correct includes.
so the eventual goal here is to prepare for:
- drop #include <linux/of_device.h> from include/linux/of_platform.h
- drop #include <linux/of.h> from include/linux/of_device.h
- drop #include <linux/of_platform.h> from include/linux/of_device.h
- drop #include <linux/platform_device.h> from include/linux/of_device.h
- drop #include <linux/platform_device.h> from include/linux/of_platform.h
> Signed-off-by: Rob Herring <robh@...nel.org>
> ---
> drivers/pwm/core.c | 1 +
> drivers/pwm/pwm-apple.c | 1 +
> drivers/pwm/pwm-atmel-hlcdc.c | 1 +
> drivers/pwm/pwm-atmel-tcb.c | 3 +--
> drivers/pwm/pwm-atmel.c | 1 -
> drivers/pwm/pwm-berlin.c | 1 +
> drivers/pwm/pwm-cros-ec.c | 1 +
> drivers/pwm/pwm-fsl-ftm.c | 3 +--
> drivers/pwm/pwm-hibvt.c | 2 +-
> drivers/pwm/pwm-imx1.c | 1 -
> drivers/pwm/pwm-jz4740.c | 2 +-
> drivers/pwm/pwm-lp3943.c | 1 +
> drivers/pwm/pwm-lpc18xx-sct.c | 1 +
> drivers/pwm/pwm-mediatek.c | 1 -
> drivers/pwm/pwm-meson.c | 1 -
> drivers/pwm/pwm-microchip-core.c | 2 +-
> drivers/pwm/pwm-mtk-disp.c | 1 -
> drivers/pwm/pwm-pxa.c | 1 +
> drivers/pwm/pwm-sifive.c | 1 +
> drivers/pwm/pwm-sl28cpld.c | 1 +
> drivers/pwm/pwm-sprd.c | 1 +
> drivers/pwm/pwm-sun4i.c | 1 -
> drivers/pwm/pwm-sunplus.c | 1 +
> drivers/pwm/pwm-tegra.c | 1 -
> drivers/pwm/pwm-tiecap.c | 2 +-
> drivers/pwm/pwm-tiehrpwm.c | 2 +-
> drivers/pwm/pwm-visconti.c | 2 +-
> drivers/pwm/pwm-vt8500.c | 5 +----
> 28 files changed, 21 insertions(+), 21 deletions(-)
>
> diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
> index 3dacceaef4a9..d37617c60eae 100644
> --- a/drivers/pwm/core.c
> +++ b/drivers/pwm/core.c
> @@ -8,6 +8,7 @@
>
> #include <linux/acpi.h>
> #include <linux/module.h>
> +#include <linux/of.h>
> #include <linux/pwm.h>
> #include <linux/radix-tree.h>
> #include <linux/list.h>
This file includes neither of_device.h nor of_platform.h and up to now
gets of.h via <linux/pwm.h>.
What is your plan for <linux/pwm.h>'s include? I think it would only need
struct of_phandle_args;
to replace that. (But that would need another patch like this one, as
then e.g. drivers/pwm/pwm-sl28cpld.c fails to compile because
device_property_read_u32() is undeclared. It would need to #include
<linux/property.h> which now it gets transitively via <linux/of.h>.)
If <linux/pwm.h> is planed to continue #including <linux/of.h>, the
explicit include here isn't necessary (and probably elsewhere).
I don't care much either way, but maybe your quest would be a bit
simpler if you only touch files that include the two files you want to
modify?
*shrug*, this patch is still an improvement so:
Acked-by: Uwe Kleine-Köng <u.kleine-koenig@...gutronix.de>
Another thing I wonder is: How did you identify the files that need
these includes. I guess you have a list of types for each header and
search for files that use any of the types but doesn't include the
respecitve header? I wonder if tracking this type -> header mapping in
machine readable form somewhere would be nice, to e.g. make checkpatch
warn if a file uses struct of_node but only gets it by chance?
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | https://www.pengutronix.de/ |
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