Re: [PATCH v2 1/2] pwm: Manage owner assignment implicitly for drivers

From: "Jernej Škrabec" <jernej.skrabec@gmail.com>
To: "Thierry Reding" <thierry.reding@gmail.com>,
	"Laurent Pinchart" <Laurent.pinchart@ideasonboard.com>,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
Cc: "Linus Walleij" <linus.walleij@linaro.org>,
	"Bartosz Golaszewski" <brgl@bgdev.pl>,
	"Andy Shevchenko" <andy@kernel.org>,
	"Douglas Anderson" <dianders@chromium.org>,
	"Andrzej Hajda" <andrzej.hajda@intel.com>,
	"Neil Armstrong" <neil.armstrong@linaro.org>,
	"Robert Foss" <rfoss@kernel.org>,
	"Jonas Karlman" <jonas@kwiboo.se>,
	"David Airlie" <airlied@gmail.com>,
	"Daniel Vetter" <daniel@ffwll.ch>, "Pavel Machek" <pavel@ucw.cz>,
	"Lee Jones" <lee@kernel.org>, "Hector Martin" <marcan@marcan.st>,
	"Sven Peter" <sven@svenpeter.dev>,
	"Alyssa Rosenzweig" <alyssa@rosenzweig.io>,
	"Nicolas Ferre" <nicolas.ferre@microchip.com>,
	"Alexandre Belloni" <alexandre.belloni@bootlin.com>,
	"Claudiu Beznea" <claudiu.beznea@microchip.com>,
	"Ray Jui" <rjui@broadcom.com>,
	"Scott Branden" <sbranden@broadcom.com>,
	"Broadcom internal kernel review list"
	<bcm-kernel-feedback-list@broadcom.com>,
	"Florian Fainelli" <florian.fainelli@broadcom.com>,
	"Alexander Shiyan" <shc_work@mail.ru>,
	"Benson Leung" <bleung@chromium.org>,
	"Guenter Roeck" <groeck@chromium.org>,
	"Shawn Guo" <shawnguo@kernel.org>,
	"Sascha Hauer" <s.hauer@pengutronix.de>,
	"Pengutronix Kernel Team" <kernel@pengutronix.de>,
	"Fabio Estevam" <festevam@gmail.com>,
	"NXP Linux Team" <linux-imx@nxp.com>,
	"Paul Cercueil" <paul@crapouillou.net>,
	"Vladimir Zapolskiy" <vz@mleia.com>,
	"Kevin Hilman" <khilman@baylibre.com>,
	"Jerome Brunet" <jbrunet@baylibre.com>,
	"Martin Blumenstingl" <martin.blumenstingl@googlemail.com>,
	"Conor Dooley" <conor.dooley@microchip.com>,
	"Daire McNamara" <daire.mcnamara@microchip.com>,
	"Matthias Brugger" <matthias.bgg@gmail.com>,
	"AngeloGioacchino Del Regno"
	<angelogioacchino.delregno@collabora.com>,
	"Jonathan Neuschäfer" <j.neuschaefer@gmx.net>,
	"Heiko Stuebner" <heiko@sntech.de>,
	"Krzysztof Kozlowski" <krzysztof.kozlowski@linaro.org>,
	"Alim Akhtar" <alim.akhtar@samsung.com>,
	"Palmer Dabbelt" <palmer@dabbelt.com>,
	"Paul Walmsley" <paul.walmsley@sifive.com>,
	"Michael Walle" <michael@walle.cc>,
	"Orson Zhai" <orsonzhai@gmail.com>,
	"Baolin Wang" <baolin.wang@linux.alibaba.com>,
	"Chunyan Zhang" <zhang.lyra@gmail.com>,
	"Fabrice Gasnier" <fabrice.gasnier@foss.st.com>,
	"Maxime Coquelin" <mcoquelin.stm32@gmail.com>,
	"Alexandre Torgue" <alexandre.torgue@foss.st.com>,
	"Chen-Yu Tsai" <wens@csie.org>,
	"Samuel Holland" <samuel@sholland.org>,
	"Hammer Hsieh" <hammerh0314@gmail.com>,
	"Jonathan Hunter" <jonathanh@nvidia.com>,
	"Nobuhiro Iwamatsu" <nobuhiro1.iwamatsu@toshiba.co.jp>,
	"Sean Anderson" <sean.anderson@seco.com>,
	"Michal Simek" <michal.simek@amd.com>,
	"Johan Hovold" <johan@kernel.org>,
	"Alex Elder" <elder@kernel.org>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"Anjelique Melendez" <quic_amelende@quicinc.com>,
	"Dmitry Baryshkov" <dmitry.baryshkov@linaro.org>,
	"Luca Weiss" <luca@z3ntu.xyz>,
	"Bjorn Andersson" <quic_bjorande@quicinc.com>,
	linux-pwm@vger.kernel.org, linux-gpio@vger.kernel.org,
	dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org,
	asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
	linux-rpi-kernel@lists.infradead.org,
	chrome-platform@lists.linux.dev, linux-mips@vger.kernel.org,
	linux-amlogic@lists.infradead.org,
	linux-riscv@lists.infradead.org,
	linux-mediatek@lists.infradead.org,
	linux-rockchip@lists.infradead.org,
	linux-samsung-soc@vger.kernel.org,
	linux-stm32@st-md-mailman.stormreply.com,
	linux-sunxi@lists.linux.dev, linux-tegra@vger.kernel.org,
	greybus-dev@lists.linaro.org, linux-staging@lists.linux.dev
Subject: Re: [PATCH v2 1/2] pwm: Manage owner assignment implicitly for drivers
Date: Fri, 04 Aug 2023 21:06:45 +0200	[thread overview]
Message-ID: <4820522.GXAFRqVoOG@jernej-laptop> (raw)
In-Reply-To: <20230804142707.412137-2-u.kleine-koenig@pengutronix.de>

Dne petek, 04. avgust 2023 ob 16:27:06 CEST je Uwe Kleine-König napisal(a):
> Instead of requiring each driver to care for assigning the owner member
> of struct pwm_ops, handle that implicitly using a macro. Note that the
> owner member has to be moved to struct pwm_chip, as the ops structure
> usually lives in read-only memory and so cannot be modified.
> 
> The upside is that new lowlevel drivers cannot forget the assignment and
> save one line each. The pwm-crc driver didn't assign .owner, that's not
> a problem in practise though as the driver cannot be compiled as a
> module.
> 
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
> ---
>  drivers/gpio/gpio-mvebu.c             |  1 -
>  drivers/gpu/drm/bridge/ti-sn65dsi86.c |  1 -
>  drivers/leds/rgb/leds-qcom-lpg.c      |  1 -
>  drivers/pwm/core.c                    | 24 ++++++++++++++----------
>  drivers/pwm/pwm-ab8500.c              |  1 -
>  drivers/pwm/pwm-apple.c               |  1 -
>  drivers/pwm/pwm-atmel-hlcdc.c         |  1 -
>  drivers/pwm/pwm-atmel-tcb.c           |  1 -
>  drivers/pwm/pwm-atmel.c               |  1 -
>  drivers/pwm/pwm-bcm-iproc.c           |  1 -
>  drivers/pwm/pwm-bcm-kona.c            |  1 -
>  drivers/pwm/pwm-bcm2835.c             |  1 -
>  drivers/pwm/pwm-berlin.c              |  1 -
>  drivers/pwm/pwm-brcmstb.c             |  1 -
>  drivers/pwm/pwm-clk.c                 |  1 -
>  drivers/pwm/pwm-clps711x.c            |  1 -
>  drivers/pwm/pwm-cros-ec.c             |  1 -
>  drivers/pwm/pwm-dwc.c                 |  1 -
>  drivers/pwm/pwm-ep93xx.c              |  1 -
>  drivers/pwm/pwm-fsl-ftm.c             |  1 -
>  drivers/pwm/pwm-hibvt.c               |  1 -
>  drivers/pwm/pwm-img.c                 |  1 -
>  drivers/pwm/pwm-imx-tpm.c             |  1 -
>  drivers/pwm/pwm-imx1.c                |  1 -
>  drivers/pwm/pwm-imx27.c               |  1 -
>  drivers/pwm/pwm-intel-lgm.c           |  1 -
>  drivers/pwm/pwm-iqs620a.c             |  1 -
>  drivers/pwm/pwm-jz4740.c              |  1 -
>  drivers/pwm/pwm-keembay.c             |  1 -
>  drivers/pwm/pwm-lp3943.c              |  1 -
>  drivers/pwm/pwm-lpc18xx-sct.c         |  1 -
>  drivers/pwm/pwm-lpc32xx.c             |  1 -
>  drivers/pwm/pwm-lpss.c                |  1 -
>  drivers/pwm/pwm-mediatek.c            |  1 -
>  drivers/pwm/pwm-meson.c               |  1 -
>  drivers/pwm/pwm-microchip-core.c      |  1 -
>  drivers/pwm/pwm-mtk-disp.c            |  1 -
>  drivers/pwm/pwm-mxs.c                 |  1 -
>  drivers/pwm/pwm-ntxec.c               |  1 -
>  drivers/pwm/pwm-omap-dmtimer.c        |  1 -
>  drivers/pwm/pwm-pca9685.c             |  1 -
>  drivers/pwm/pwm-pxa.c                 |  1 -
>  drivers/pwm/pwm-raspberrypi-poe.c     |  1 -
>  drivers/pwm/pwm-rcar.c                |  1 -
>  drivers/pwm/pwm-renesas-tpu.c         |  1 -
>  drivers/pwm/pwm-rockchip.c            |  1 -
>  drivers/pwm/pwm-rz-mtu3.c             |  1 -
>  drivers/pwm/pwm-samsung.c             |  1 -
>  drivers/pwm/pwm-sifive.c              |  1 -
>  drivers/pwm/pwm-sl28cpld.c            |  1 -
>  drivers/pwm/pwm-spear.c               |  1 -
>  drivers/pwm/pwm-sprd.c                |  1 -
>  drivers/pwm/pwm-sti.c                 |  1 -
>  drivers/pwm/pwm-stm32-lp.c            |  1 -
>  drivers/pwm/pwm-stm32.c               |  1 -
>  drivers/pwm/pwm-stmpe.c               |  1 -
>  drivers/pwm/pwm-sun4i.c               |  1 -

For sun4i:
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>

Best regards,
Jernej

>  drivers/pwm/pwm-sunplus.c             |  1 -
>  drivers/pwm/pwm-tegra.c               |  1 -
>  drivers/pwm/pwm-tiecap.c              |  1 -
>  drivers/pwm/pwm-tiehrpwm.c            |  1 -
>  drivers/pwm/pwm-twl-led.c             |  2 --
>  drivers/pwm/pwm-twl.c                 |  2 --
>  drivers/pwm/pwm-visconti.c            |  1 -
>  drivers/pwm/pwm-vt8500.c              |  1 -
>  drivers/pwm/pwm-xilinx.c              |  1 -
>  drivers/staging/greybus/pwm.c         |  1 -
>  include/linux/pwm.h                   | 10 ++++++----