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gpiolib: make legacy interfaces optional

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The traditional interfaces are only used on a small number of ancient
boards. Make these optional now so they can be disabled by default.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Link: https://lore.kernel.org/r/20250722153634.3683927-1-arnd@kernel.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This commit is contained in:
Arnd Bergmann 2025-07-22 17:35:43 +02:00 • committed by Bartosz Golaszewski
parent 8c7a86088a
commit 678bae2eaa
3 changed files with 10 additions and 5 deletions
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3
drivers/gpio/Kconfig
View file

@ -14,6 +14,9 @@ menuconfig GPIOLIB
if GPIOLIB
config GPIOLIB_LEGACY
def_bool y
config GPIOLIB_FASTPATH_LIMIT
int "Maximum number of GPIOs for fast path"
range 32 512

2
drivers/gpio/Makefile
View file

@ -5,7 +5,7 @@ ccflags-$(CONFIG_DEBUG_GPIO) += -DDEBUG
obj-$(CONFIG_GPIOLIB) += gpiolib.o
obj-$(CONFIG_GPIOLIB) += gpiolib-devres.o
obj-$(CONFIG_GPIOLIB) += gpiolib-legacy.o
obj-$(CONFIG_GPIOLIB_LEGACY) += gpiolib-legacy.o
obj-$(CONFIG_OF_GPIO) += gpiolib-of.o
obj-$(CONFIG_GPIO_CDEV) += gpiolib-cdev.o
obj-$(CONFIG_GPIO_SYSFS) += gpiolib-sysfs.o

10
include/linux/gpio.h
View file

@ -13,6 +13,11 @@
#define __LINUX_GPIO_H
#include <linux/types.h>
#ifdef CONFIG_GPIOLIB
#include <linux/gpio/consumer.h>
#endif
#ifdef CONFIG_GPIOLIB_LEGACY
struct device;
@ -22,9 +27,6 @@ struct device;
#define GPIOF_OUT_INIT_HIGH ((0 << 0) | (1 << 1))
#ifdef CONFIG_GPIOLIB
#include <linux/gpio/consumer.h>
/*
* "valid" GPIO numbers are nonnegative and may be passed to
* setup routines like gpio_request(). Only some valid numbers
@ -170,5 +172,5 @@ static inline int devm_gpio_request_one(struct device *dev, unsigned gpio,
}
#endif /* ! CONFIG_GPIOLIB */
#endif /* CONFIG_GPIOLIB_LEGACY */
#endif /* __LINUX_GPIO_H */