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Mon, 23 Mar 2026 12:01:13 -0700 (PDT) Date: Mon, 23 Mar 2026 22:01:10 +0300 From: Dan Carpenter To: Linus Walleij , AKASHI Takahiro Cc: Bartosz Golaszewski , linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, Andy Shevchenko , Linus Walleij , Bartosz Golaszewski , arm-scmi@vger.kernel.org, Vincent Guittot , Khaled Ali Ahmed , Michal Simek Subject: [PATCH v6 1/7] pinctrl: introduce pinctrl_gpio_get_config() Message-ID: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: AKASHI Takahiro This is a counterpart of pinctrl_gpio_set_config(), which will be used to implement the ->get() interface in a GPIO driver for SCMI. This also requires that we create a stub so pin_config_get_for_pin() can build when CONFIG_PINCONF is disabled. Signed-off-by: AKASHI Takahiro Signed-off-by: Dan Carpenter Reviewed-by: Linus Walleij Reviewed-by: Andy Shevchenko --- v6: Fix build breakage with !CONFIG_PINCONF v5: No change v4: Fix kernel-doc (Andy). Add r-b tags v3: Forward port drivers/pinctrl/core.c | 31 +++++++++++++++++++++++++++++++ drivers/pinctrl/pinconf.h | 6 ++++++ include/linux/pinctrl/consumer.h | 9 +++++++++ 3 files changed, 46 insertions(+) diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c index 2edc9bdad183..c471f3fbd035 100644 --- a/drivers/pinctrl/core.c +++ b/drivers/pinctrl/core.c @@ -30,6 +30,7 @@ #include #include #include +#include #include =20 #include "core.h" @@ -938,6 +939,36 @@ int pinctrl_gpio_set_config(struct gpio_chip *gc, unsi= gned int offset, } EXPORT_SYMBOL_GPL(pinctrl_gpio_set_config); =20 +/** + * pinctrl_gpio_get_config() - Get the config for a given GPIO pin + * @gc: GPIO chip structure from the GPIO subsystem + * @offset: hardware offset of the GPIO relative to the controller + * @config: the configuration to query. On success it holds the result + * Return: 0 on success, negative errno otherwise + */ +int pinctrl_gpio_get_config(struct gpio_chip *gc, unsigned int offset, uns= igned long *config) +{ + struct pinctrl_gpio_range *range; + struct pinctrl_dev *pctldev; + int ret, pin; + + ret =3D pinctrl_get_device_gpio_range(gc, offset, &pctldev, &range); + if (ret) + return ret; + + mutex_lock(&pctldev->mutex); + pin =3D gpio_to_pin(range, gc, offset); + ret =3D pin_config_get_for_pin(pctldev, pin, config); + mutex_unlock(&pctldev->mutex); + + if (ret) + return ret; + + *config =3D pinconf_to_config_argument(*config); + return 0; +} +EXPORT_SYMBOL_GPL(pinctrl_gpio_get_config); + static struct pinctrl_state *find_state(struct pinctrl *p, const char *name) { diff --git a/drivers/pinctrl/pinconf.h b/drivers/pinctrl/pinconf.h index 2880adef476e..659a781e2091 100644 --- a/drivers/pinctrl/pinconf.h +++ b/drivers/pinctrl/pinconf.h @@ -74,6 +74,12 @@ static inline int pinconf_set_config(struct pinctrl_dev = *pctldev, unsigned int p return -ENOTSUPP; } =20 +static inline int pin_config_get_for_pin(struct pinctrl_dev *pctldev, unsi= gned int pin, + unsigned long *config) +{ + return -ENOTSUPP; +} + #endif =20 #if defined(CONFIG_PINCONF) && defined(CONFIG_DEBUG_FS) diff --git a/include/linux/pinctrl/consumer.h b/include/linux/pinctrl/consu= mer.h index 63ce16191eb9..11b8f0b8da0c 100644 --- a/include/linux/pinctrl/consumer.h +++ b/include/linux/pinctrl/consumer.h @@ -35,6 +35,8 @@ int pinctrl_gpio_direction_output(struct gpio_chip *gc, unsigned int offset); int pinctrl_gpio_set_config(struct gpio_chip *gc, unsigned int offset, unsigned long config); +int pinctrl_gpio_get_config(struct gpio_chip *gc, unsigned int offset, + unsigned long *config); =20 struct pinctrl * __must_check pinctrl_get(struct device *dev); void pinctrl_put(struct pinctrl *p); @@ -101,6 +103,13 @@ pinctrl_gpio_direction_output(struct gpio_chip *gc, un= signed int offset) return 0; } =20 +static inline int +pinctrl_gpio_get_config(struct gpio_chip *gc, unsigned int offset, + unsigned long *config) +{ + return 0; +} + static inline int pinctrl_gpio_set_config(struct gpio_chip *gc, unsigned int offset, unsigned long config) --=20 2.53.0