linux-kernel - Re: [PATCH v4 01/13] gpiolib: Introduce for_each_gpiochip

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Date:   Tue, 5 Apr 2022 14:12:50 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Qianggui Song <qianggui.song@...ogic.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Marc Zyngier <maz@...nel.org>,
        Fabien Dessenne <fabien.dessenne@...s.st.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-amlogic@...ts.infradead.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        OpenBMC Maillist <openbmc@...ts.ozlabs.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        linux-samsung-soc@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        Neil Armstrong <narmstrong@...libre.com>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Avi Fishman <avifishman70@...il.com>,
        Tomer Maimon <tmaimon77@...il.com>,
        Tali Perry <tali.perry1@...il.com>,
        Patrick Venture <venture@...gle.com>,
        Nancy Yuen <yuenn@...gle.com>,
        Benjamin Fair <benjaminfair@...gle.com>,
        Tomasz Figa <tomasz.figa@...il.com>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Philipp Zabel <p.zabel@...gutronix.de>
Subject: Re: [PATCH v4 01/13] gpiolib: Introduce for_each_gpiochip_node() loop helper

On Fri, Apr 1, 2022 at 12:36 PM Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
>
> Introduce for_each_gpiochip_node() loop helper which iterates over
> the GPIO controller child nodes of a given device.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
> Tested-by: Geert Uytterhoeven <geert+renesas@...der.be>
> ---
>  include/linux/gpio/driver.h | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
> index 98c93510640e..bfc91f122d5f 100644
> --- a/include/linux/gpio/driver.h
> +++ b/include/linux/gpio/driver.h
> @@ -3,13 +3,14 @@
>  #define __LINUX_GPIO_DRIVER_H
>
>  #include <linux/device.h>
> -#include <linux/types.h>
>  #include <linux/irq.h>
>  #include <linux/irqchip/chained_irq.h>
>  #include <linux/irqdomain.h>
>  #include <linux/lockdep.h>
>  #include <linux/pinctrl/pinctrl.h>
>  #include <linux/pinctrl/pinconf-generic.h>
> +#include <linux/property.h>
> +#include <linux/types.h>
>
>  struct gpio_desc;
>  struct of_phandle_args;
> @@ -750,4 +751,8 @@ static inline void gpiochip_unlock_as_irq(struct gpio_chip *gc,
>  }
>  #endif /* CONFIG_GPIOLIB */
>
> +#define for_each_gpiochip_node(dev, child)                                     \
> +       device_for_each_child_node(dev, child)                                  \
> +               if (!fwnode_property_present(child, "gpio-controller")) {} else
> +
>  #endif /* __LINUX_GPIO_DRIVER_H */
> --
> 2.35.1
>

Acked-by: Bartosz Golaszewski <brgl@...ev.pl>