linux-kernel - [PATCH v2 4/9] gpiolib: Warn on drivers still using static gpiobase allocation

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Message-Id: <eda8ddff9d7d381a63732a183fc00bfbfc263516.1662116601.git.christophe.leroy@csgroup.eu>
Date:   Fri,  2 Sep 2022 14:42:04 +0200
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Keerthy <j-keerthy@...com>, Russell King <linux@...linux.org.uk>,
        Arnd Bergmann <arnd@...db.de>,
        Jonathan Corbet <corbet@....net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Davide Ciminaghi <ciminaghi@...dd.com>
Cc:     Christophe Leroy <christophe.leroy@...roup.eu>,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-arch@...r.kernel.org,
        linux-doc@...r.kernel.org, x86@...nel.org,
        Andy Shevchenko <andy.shevchenko@...il.com>
Subject: [PATCH v2 4/9] gpiolib: Warn on drivers still using static gpiobase allocation

In the preparation of getting completely rid of static gpiobase
allocation in the future, emit a warning in drivers still doing so.

Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
---
v2: unsplit the warning text.
---
 drivers/gpio/gpiolib.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index cc9c0a12259e..4e2fcb7b0a01 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -715,6 +715,9 @@ int gpiochip_add_data_with_key(struct gpio_chip *gc, void *data,
 		 * a poison instead.
 		 */
 		gc->base = base;
+	} else {
+		dev_warn(&gdev->dev,
+			 "Static allocation of GPIO base is deprecated, use dynamic allocation.\n");
 	}
 	gdev->base = base;
 
-- 
2.37.1