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Tue, 11 Feb 2025 04:10:03 -0800 (PST) From: Bartosz Golaszewski Date: Tue, 11 Feb 2025 13:09:36 +0100 Subject: [PATCH 02/14] gpiolib: wrap gpio_chip::set() Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250211-gpio-set-retval-v1-2-52d3d613d7d3@linaro.org> References: <20250211-gpio-set-retval-v1-0-52d3d613d7d3@linaro.org> In-Reply-To: <20250211-gpio-set-retval-v1-0-52d3d613d7d3@linaro.org> To: Linus Walleij , Bartosz Golaszewski , Michael Walle , Bamvor Jian Zhang , Geert Uytterhoeven , Keerthy , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pwm@vger.kernel.org, Bartosz Golaszewski X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=openpgp-sha256; l=2093; i=bartosz.golaszewski@linaro.org; h=from:subject:message-id; bh=mUYillua396qTpKVAHzLY6KYpt0/yytGd3oRzjdo/zU=; b=owEBbQKS/ZANAwAKARGnLqAUcddyAcsmYgBnqz4VVFl+RrrC3Le01DvDprJsAWF06daXfViIm 8D6OIwU+HmJAjMEAAEKAB0WIQQWnetsC8PEYBPSx58Rpy6gFHHXcgUCZ6s+FQAKCRARpy6gFHHX co2lD/9YmNWa2vCgSb+a5q1W7hneYy5sCN/lxxqxi9h6PHVGFNkgM+O01EX0x5ugFpujDda8g5B 1MHXxUYpOlOxh/Fecy9M1audvEcJrtoJJJvzKngGAPV4abSAt7wTiExk73+bhFfFiwrE2tNZNsE FXI38XZU/VGuQqO/xWVmkPeO9LuUrgsil/Lt3HhpsYFsw56JeZfzzpm/OOvzBhzmP2SQihaoTvm bCRG5ObmxcLS1us6hmr2LDvwTciWp87gKfRT0MOmtSwn2purP54d/rghqEkTcaeu1QaOdAu89bP AL/FfbXZgdE5bEZdbL4JFSuD5NJcb14qBq2SJ/y004ZE01lP4tZ+yyQydkgYl2iuegCGGBQwqOw vrXlPqrHEoBWLFQOq6sNvHl464BcxGM+kRufiIfuzAB5niHC04Lk9kvzyltpl9G+GNh7zO6E2CX PFVbfoFPHfRPDXrdmwLjNly/7wdS6yLa2X41DLbdSExxPXWF//+TDOzqwaC2Fe3SwAWJdalo/fv dIZdw84jaweMHTbCqqgCHL6VfeYnQANCDgvzi3m7tpaySMgt/2BVZIw/YqbSADEkxa/vuWL8Os8 EgkztChReNSK9YZ1co43MzazR22QSa5dlX5g2hwJ+YCbzUiXrbJ0GIyHhsC66Lw5F1WKwWh7Ez2 tAu296INMZ+5VuA== X-Developer-Key: i=bartosz.golaszewski@linaro.org; a=openpgp; fpr=169DEB6C0BC3C46013D2C79F11A72EA01471D772 From: Bartosz Golaszewski We have three places where we dereference the gpio_chip::set() callback. In order to make it easier to incorporate the upcoming new variant of this callback (one returning an integer value), wrap it in a helper so that the dereferencing only happens once. Signed-off-by: Bartosz Golaszewski --- drivers/gpio/gpiolib.c | 21 ++++++++++++++++----- 1 file changed, 16 insertions(+), 5 deletions(-) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index f31c1ed905c0..7826bfb72104 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -2747,6 +2747,17 @@ int gpiod_direction_input_nonotify(struct gpio_desc = *desc) return ret; } =20 +static int gpiochip_set(struct gpio_chip *gc, unsigned int offset, int val= ue) +{ + lockdep_assert_held(&gc->gpiodev->srcu); + + if (WARN_ON(unlikely(!gc->set))) + return -EOPNOTSUPP; + + gc->set(gc, offset, value); + return 0; +} + static int gpiod_direction_output_raw_commit(struct gpio_desc *desc, int v= alue) { int val =3D !!value, ret =3D 0; @@ -2783,7 +2794,9 @@ static int gpiod_direction_output_raw_commit(struct g= pio_desc *desc, int value) * If we can't actively set the direction, we are some * output-only chip, so just drive the output as desired. */ - guard.gc->set(guard.gc, gpio_chip_hwgpio(desc), val); + ret =3D gpiochip_set(guard.gc, gpio_chip_hwgpio(desc), val); + if (ret) + return ret; } =20 if (!ret) @@ -3443,9 +3456,7 @@ static int gpiod_set_raw_value_commit(struct gpio_des= c *desc, bool value) return -ENODEV; =20 trace_gpio_value(desc_to_gpio(desc), 0, value); - guard.gc->set(guard.gc, gpio_chip_hwgpio(desc), value); - - return 0; + return gpiochip_set(guard.gc, gpio_chip_hwgpio(desc), value); } =20 /* @@ -3468,7 +3479,7 @@ static void gpio_chip_set_multiple(struct gpio_chip *= gc, =20 /* set outputs if the corresponding mask bit is set */ for_each_set_bit(i, mask, gc->ngpio) - gc->set(gc, i, test_bit(i, bits)); + gpiochip_set(gc, i, test_bit(i, bits)); } } =20 --=20 2.45.2