linux-kernel - [PATCH 05/21] gpiolib: add support for scope-based management to gpio

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Message-Id: <20230905185309.131295-6-brgl@bgdev.pl>
Date:   Tue,  5 Sep 2023 20:52:53 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Aaro Koskinen <aaro.koskinen@....fi>,
        Janusz Krzysztofik <jmkrzyszt@...il.com>,
        Tony Lindgren <tony@...mide.com>,
        Russell King <linux@...linux.org.uk>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Dipen Patel <dipenp@...dia.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <markgross@...nel.org>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-acpi@...r.kernel.org, timestamp@...ts.linux.dev,
        linux-tegra@...r.kernel.org, platform-driver-x86@...r.kernel.org,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH 05/21] gpiolib: add support for scope-based management to gpio_device

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

As the few users that need to get the reference to the GPIO device often
release it right after inspecting its properties, let's add support for
the automatic reference release to struct gpio_device.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
 include/linux/gpio/driver.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index a769baf3d731..b2572b26c8e3 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -614,6 +614,8 @@ struct gpio_device *gpio_device_find_by_label(const char *label);
 struct gpio_device *gpio_device_get(struct gpio_device *gdev);
 void gpio_device_put(struct gpio_device *gdev);
 
+DEFINE_FREE(gpio_device_put, struct gpio_device *, if (_T) gpio_device_put(_T));
+
 bool gpiochip_line_is_irq(struct gpio_chip *gc, unsigned int offset);
 int gpiochip_reqres_irq(struct gpio_chip *gc, unsigned int offset);
 void gpiochip_relres_irq(struct gpio_chip *gc, unsigned int offset);
-- 
2.39.2