From 21d9526d13b5467b0a6532e5a8b0eb04c01ce326 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Fri, 3 Jul 2020 15:04:51 +0200 Subject: gpiolib: Make the legacy consumer-only The legacy header was an all-inclusive header used by drivers and consumers alike. After eliminating the last users of the driver defines, we can drop the inclusion of the header. Signed-off-by: Linus Walleij Signed-off-by: Andy Shevchenko --- include/asm-generic/gpio.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include') diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h index 22cb8c9efc1d..1c910d124423 100644 --- a/include/asm-generic/gpio.h +++ b/include/asm-generic/gpio.h @@ -8,7 +8,6 @@ #ifdef CONFIG_GPIOLIB #include -#include #include /* -- cgit v1.2.3 From 94d20f7d674d589e94aea77e2cbe37fc58541d04 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Tue, 7 Feb 2023 16:29:42 +0200 Subject: gpiolib: coldfire: remove custom asm/gpio.h Now that coldfire is the only user of a custom asm/gpio.h, it seems better to remove this as well, and have the same interface everywhere. For the gpio_get_value()/gpio_set_value()/gpio_to_irq(), gpio_cansleep() functions, the custom version is only a micro-optimization to inline the function for constant GPIO numbers. However, in the coldfire defconfigs, I was unable to find a single instance where this micro-optimization was even used, and according to Geert the only user appears to be the QSPI chip that is disabled everywhere. The custom gpio_request_one() function is even less useful, as it is guarded by an #ifdef that is never true. Reviewed-by: Geert Uytterhoeven Reviewed-by: Andy Shevchenko Acked-by: Bartosz Golaszewski Signed-off-by: Arnd Bergmann Reviewed-by: Linus Walleij Signed-off-by: Andy Shevchenko --- arch/m68k/Kconfig.cpu | 1 - arch/m68k/include/asm/gpio.h | 95 -------------------------------------------- drivers/gpio/Kconfig | 8 ---- include/linux/gpio.h | 7 ---- 4 files changed, 111 deletions(-) delete mode 100644 arch/m68k/include/asm/gpio.h (limited to 'include') diff --git a/arch/m68k/Kconfig.cpu b/arch/m68k/Kconfig.cpu index 9380f6e3bb66..96a0fb4f1af5 100644 --- a/arch/m68k/Kconfig.cpu +++ b/arch/m68k/Kconfig.cpu @@ -24,7 +24,6 @@ config M68KCLASSIC config COLDFIRE bool "Coldfire CPU family support" - select ARCH_HAVE_CUSTOM_GPIO_H select CPU_HAS_NO_BITFIELDS select CPU_HAS_NO_CAS select CPU_HAS_NO_MULDIV64 diff --git a/arch/m68k/include/asm/gpio.h b/arch/m68k/include/asm/gpio.h deleted file mode 100644 index 5cfc0996ba94..000000000000 --- a/arch/m68k/include/asm/gpio.h +++ /dev/null @@ -1,95 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * Coldfire generic GPIO support - * - * (C) Copyright 2009, Steven King -*/ - -#ifndef coldfire_gpio_h -#define coldfire_gpio_h - -#include -#include -#include -#include -/* - * The Generic GPIO functions - * - * If the gpio is a compile time constant and is one of the Coldfire gpios, - * use the inline version, otherwise dispatch thru gpiolib. - */ - -static inline int gpio_get_value(unsigned gpio) -{ - if (__builtin_constant_p(gpio) && gpio < MCFGPIO_PIN_MAX) - return mcfgpio_read(__mcfgpio_ppdr(gpio)) & mcfgpio_bit(gpio); - else - return __gpio_get_value(gpio); -} - -static inline void gpio_set_value(unsigned gpio, int value) -{ - if (__builtin_constant_p(gpio) && gpio < MCFGPIO_PIN_MAX) { - if (gpio < MCFGPIO_SCR_START) { - unsigned long flags; - MCFGPIO_PORTTYPE data; - - local_irq_save(flags); - data = mcfgpio_read(__mcfgpio_podr(gpio)); - if (value) - data |= mcfgpio_bit(gpio); - else - data &= ~mcfgpio_bit(gpio); - mcfgpio_write(data, __mcfgpio_podr(gpio)); - local_irq_restore(flags); - } else { - if (value) - mcfgpio_write(mcfgpio_bit(gpio), - MCFGPIO_SETR_PORT(gpio)); - else - mcfgpio_write(~mcfgpio_bit(gpio), - MCFGPIO_CLRR_PORT(gpio)); - } - } else - __gpio_set_value(gpio, value); -} - -static inline int gpio_to_irq(unsigned gpio) -{ -#if defined(MCFGPIO_IRQ_MIN) - if ((gpio >= MCFGPIO_IRQ_MIN) && (gpio < MCFGPIO_IRQ_MAX)) -#else - if (gpio < MCFGPIO_IRQ_MAX) -#endif - return gpio + MCFGPIO_IRQ_VECBASE; - else - return __gpio_to_irq(gpio); -} - -static inline int gpio_cansleep(unsigned gpio) -{ - return gpio < MCFGPIO_PIN_MAX ? 0 : __gpio_cansleep(gpio); -} - -#ifndef CONFIG_GPIOLIB -static inline int gpio_request_one(unsigned gpio, unsigned long flags, const char *label) -{ - int err; - - err = gpio_request(gpio, label); - if (err) - return err; - - if (flags & GPIOF_DIR_IN) - err = gpio_direction_input(gpio); - else - err = gpio_direction_output(gpio, - (flags & GPIOF_INIT_HIGH) ? 1 : 0); - - if (err) - gpio_free(gpio); - - return err; -} -#endif /* !CONFIG_GPIOLIB */ -#endif diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 13be729710f2..df82fb7eb0eb 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -3,14 +3,6 @@ # GPIO infrastructure and drivers # -config ARCH_HAVE_CUSTOM_GPIO_H - bool - help - Selecting this config option from the architecture Kconfig allows - the architecture to provide a custom asm/gpio.h implementation - overriding the default implementations. New uses of this are - strongly discouraged. - menuconfig GPIOLIB bool "GPIO Support" help diff --git a/include/linux/gpio.h b/include/linux/gpio.h index 85beb236c925..2b75017b3aad 100644 --- a/include/linux/gpio.h +++ b/include/linux/gpio.h @@ -54,11 +54,6 @@ struct gpio { }; #ifdef CONFIG_GPIOLIB - -#ifdef CONFIG_ARCH_HAVE_CUSTOM_GPIO_H -#include -#else - #include static inline int gpio_get_value(unsigned int gpio) @@ -81,8 +76,6 @@ static inline int gpio_to_irq(unsigned int gpio) return __gpio_to_irq(gpio); } -#endif /* ! CONFIG_ARCH_HAVE_CUSTOM_GPIO_H */ - /* CONFIG_GPIOLIB: bindings for managed devices that want to request gpios */ struct device; -- cgit v1.2.3 From eccb7a00613c804ec7244676090bf6ee43a23da2 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Wed, 8 Feb 2023 17:37:22 +0200 Subject: gpiolib: remove asm-generic/gpio.h The asm-generic/gpio.h file is now always included when using gpiolib, so just move its contents into linux/gpio.h with a few minor simplifications. Signed-off-by: Arnd Bergmann Reviewed-by: Linus Walleij Reviewed-by: Andy Shevchenko Signed-off-by: Andy Shevchenko --- MAINTAINERS | 1 - arch/m68k/include/asm/mcfgpio.h | 2 +- drivers/gpio/gpio-davinci.c | 2 - drivers/pinctrl/core.c | 1 - include/asm-generic/gpio.h | 146 ---------------------------------------- include/linux/gpio.h | 94 +++++++++++++++++++++++--- 6 files changed, 85 insertions(+), 161 deletions(-) delete mode 100644 include/asm-generic/gpio.h (limited to 'include') diff --git a/MAINTAINERS b/MAINTAINERS index 8d5bc223f305..ddf686c2e546 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -8752,7 +8752,6 @@ F: Documentation/admin-guide/gpio/ F: Documentation/devicetree/bindings/gpio/ F: Documentation/driver-api/gpio/ F: drivers/gpio/ -F: include/asm-generic/gpio.h F: include/dt-bindings/gpio/ F: include/linux/gpio.h F: include/linux/gpio/ diff --git a/arch/m68k/include/asm/mcfgpio.h b/arch/m68k/include/asm/mcfgpio.h index 27f32cc81da6..2cefe8445980 100644 --- a/arch/m68k/include/asm/mcfgpio.h +++ b/arch/m68k/include/asm/mcfgpio.h @@ -9,7 +9,7 @@ #define mcfgpio_h #ifdef CONFIG_GPIOLIB -#include +#include #else int __mcfgpio_get_value(unsigned gpio); diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c index 26b1f7465e09..7fc83057990a 100644 --- a/drivers/gpio/gpio-davinci.c +++ b/drivers/gpio/gpio-davinci.c @@ -24,8 +24,6 @@ #include #include -#include - #define MAX_REGS_BANKS 5 #define MAX_INT_PER_BANK 32 diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c index d6e6c751255f..401886c81344 100644 --- a/drivers/pinctrl/core.c +++ b/drivers/pinctrl/core.c @@ -30,7 +30,6 @@ #ifdef CONFIG_GPIOLIB #include "../gpio/gpiolib.h" -#include #endif #include "core.h" diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h deleted file mode 100644 index 1c910d124423..000000000000 --- a/include/asm-generic/gpio.h +++ /dev/null @@ -1,146 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _ASM_GENERIC_GPIO_H -#define _ASM_GENERIC_GPIO_H - -#include -#include - -#ifdef CONFIG_GPIOLIB - -#include -#include - -/* - * Platforms may implement their GPIO interface with library code, - * at a small performance cost for non-inlined operations and some - * extra memory (for code and for per-GPIO table entries). - */ - -/* - * At the end we want all GPIOs to be dynamically allocated from 0. - * However, some legacy drivers still perform fixed allocation. - * Until they are all fixed, leave 0-512 space for them. - */ -#define GPIO_DYNAMIC_BASE 512 - -struct device; -struct gpio; -struct seq_file; -struct module; -struct device_node; -struct gpio_desc; - -/* Always use the library code for GPIO management calls, - * or when sleeping may be involved. - */ -extern int gpio_request(unsigned gpio, const char *label); -extern void gpio_free(unsigned gpio); - -static inline int gpio_direction_input(unsigned gpio) -{ - return gpiod_direction_input(gpio_to_desc(gpio)); -} -static inline int gpio_direction_output(unsigned gpio, int value) -{ - return gpiod_direction_output_raw(gpio_to_desc(gpio), value); -} - -static inline int gpio_set_debounce(unsigned gpio, unsigned debounce) -{ - return gpiod_set_debounce(gpio_to_desc(gpio), debounce); -} - -static inline int gpio_get_value_cansleep(unsigned gpio) -{ - return gpiod_get_raw_value_cansleep(gpio_to_desc(gpio)); -} -static inline void gpio_set_value_cansleep(unsigned gpio, int value) -{ - return gpiod_set_raw_value_cansleep(gpio_to_desc(gpio), value); -} - - -/* A platform's code may want to inline the I/O calls when - * the GPIO is constant and refers to some always-present controller, - * giving direct access to chip registers and tight bitbanging loops. - */ -static inline int __gpio_get_value(unsigned gpio) -{ - return gpiod_get_raw_value(gpio_to_desc(gpio)); -} -static inline void __gpio_set_value(unsigned gpio, int value) -{ - return gpiod_set_raw_value(gpio_to_desc(gpio), value); -} - -static inline int __gpio_cansleep(unsigned gpio) -{ - return gpiod_cansleep(gpio_to_desc(gpio)); -} - -static inline int __gpio_to_irq(unsigned gpio) -{ - return gpiod_to_irq(gpio_to_desc(gpio)); -} - -extern int gpio_request_one(unsigned gpio, unsigned long flags, const char *label); -extern int gpio_request_array(const struct gpio *array, size_t num); -extern void gpio_free_array(const struct gpio *array, size_t num); - -/* - * A sysfs interface can be exported by individual drivers if they want, - * but more typically is configured entirely from userspace. - */ -static inline int gpio_export(unsigned gpio, bool direction_may_change) -{ - return gpiod_export(gpio_to_desc(gpio), direction_may_change); -} - -static inline void gpio_unexport(unsigned gpio) -{ - gpiod_unexport(gpio_to_desc(gpio)); -} - -#else /* !CONFIG_GPIOLIB */ - -#include - -/* platforms that don't directly support access to GPIOs through I2C, SPI, - * or other blocking infrastructure can use these wrappers. - */ - -static inline int gpio_cansleep(unsigned gpio) -{ - return 0; -} - -static inline int gpio_get_value_cansleep(unsigned gpio) -{ - might_sleep(); - return __gpio_get_value(gpio); -} - -static inline void gpio_set_value_cansleep(unsigned gpio, int value) -{ - might_sleep(); - __gpio_set_value(gpio, value); -} - -#endif /* !CONFIG_GPIOLIB */ - -/* - * "valid" GPIO numbers are nonnegative and may be passed to - * setup routines like gpio_request(). only some valid numbers - * can successfully be requested and used. - * - * Invalid GPIO numbers are useful for indicating no-such-GPIO in - * platform data and other tables. - */ - -static inline bool gpio_is_valid(int number) -{ - /* only non-negative numbers are valid */ - return number >= 0; -} - -#endif /* _ASM_GENERIC_GPIO_H */ diff --git a/include/linux/gpio.h b/include/linux/gpio.h index 2b75017b3aad..d5ce78e2bdd9 100644 --- a/include/linux/gpio.h +++ b/include/linux/gpio.h @@ -13,6 +13,7 @@ #define __LINUX_GPIO_H #include +#include /* see Documentation/driver-api/gpio/legacy.rst */ @@ -54,26 +55,100 @@ struct gpio { }; #ifdef CONFIG_GPIOLIB -#include -static inline int gpio_get_value(unsigned int gpio) +#include + +/* + * "valid" GPIO numbers are nonnegative and may be passed to + * setup routines like gpio_request(). Only some valid numbers + * can successfully be requested and used. + * + * Invalid GPIO numbers are useful for indicating no-such-GPIO in + * platform data and other tables. + */ +static inline bool gpio_is_valid(int number) +{ + /* only non-negative numbers are valid */ + return number >= 0; +} + +/* + * Platforms may implement their GPIO interface with library code, + * at a small performance cost for non-inlined operations and some + * extra memory (for code and for per-GPIO table entries). + */ + +/* + * At the end we want all GPIOs to be dynamically allocated from 0. + * However, some legacy drivers still perform fixed allocation. + * Until they are all fixed, leave 0-512 space for them. + */ +#define GPIO_DYNAMIC_BASE 512 + +/* Always use the library code for GPIO management calls, + * or when sleeping may be involved. + */ +int gpio_request(unsigned gpio, const char *label); +void gpio_free(unsigned gpio); + +static inline int gpio_direction_input(unsigned gpio) +{ + return gpiod_direction_input(gpio_to_desc(gpio)); +} +static inline int gpio_direction_output(unsigned gpio, int value) +{ + return gpiod_direction_output_raw(gpio_to_desc(gpio), value); +} + +static inline int gpio_set_debounce(unsigned gpio, unsigned debounce) +{ + return gpiod_set_debounce(gpio_to_desc(gpio), debounce); +} + +static inline int gpio_get_value_cansleep(unsigned gpio) +{ + return gpiod_get_raw_value_cansleep(gpio_to_desc(gpio)); +} +static inline void gpio_set_value_cansleep(unsigned gpio, int value) { - return __gpio_get_value(gpio); + return gpiod_set_raw_value_cansleep(gpio_to_desc(gpio), value); } -static inline void gpio_set_value(unsigned int gpio, int value) +static inline int gpio_get_value(unsigned gpio) +{ + return gpiod_get_raw_value(gpio_to_desc(gpio)); +} +static inline void gpio_set_value(unsigned gpio, int value) { - __gpio_set_value(gpio, value); + return gpiod_set_raw_value(gpio_to_desc(gpio), value); } -static inline int gpio_cansleep(unsigned int gpio) +static inline int gpio_cansleep(unsigned gpio) { - return __gpio_cansleep(gpio); + return gpiod_cansleep(gpio_to_desc(gpio)); } -static inline int gpio_to_irq(unsigned int gpio) +static inline int gpio_to_irq(unsigned gpio) { - return __gpio_to_irq(gpio); + return gpiod_to_irq(gpio_to_desc(gpio)); +} + +int gpio_request_one(unsigned gpio, unsigned long flags, const char *label); +int gpio_request_array(const struct gpio *array, size_t num); +void gpio_free_array(const struct gpio *array, size_t num); + +/* + * A sysfs interface can be exported by individual drivers if they want, + * but more typically is configured entirely from userspace. + */ +static inline int gpio_export(unsigned gpio, bool direction_may_change) +{ + return gpiod_export(gpio_to_desc(gpio), direction_may_change); +} + +static inline void gpio_unexport(unsigned gpio) +{ + gpiod_unexport(gpio_to_desc(gpio)); } /* CONFIG_GPIOLIB: bindings for managed devices that want to request gpios */ @@ -88,7 +163,6 @@ int devm_gpio_request_one(struct device *dev, unsigned gpio, #include #include -#include struct device; struct gpio_chip; -- cgit v1.2.3 From 0e685c3e7158d35626d6d76b9f859eae806d87fa Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Tue, 7 Feb 2023 16:29:44 +0200 Subject: gpiolib: remove gpio_set_debounce() gpio_set_debounce() only has a single user, which is trivially converted to gpiod_set_debounce(). Signed-off-by: Arnd Bergmann Reviewed-by: Linus Walleij Reviewed-by: Andy Shevchenko Signed-off-by: Andy Shevchenko --- Documentation/driver-api/gpio/legacy.rst | 2 -- Documentation/translations/zh_CN/driver-api/gpio/legacy.rst | 1 - Documentation/translations/zh_TW/gpio.txt | 1 - drivers/input/touchscreen/ads7846.c | 5 +++-- include/linux/gpio.h | 10 ---------- 5 files changed, 3 insertions(+), 16 deletions(-) (limited to 'include') diff --git a/Documentation/driver-api/gpio/legacy.rst b/Documentation/driver-api/gpio/legacy.rst index a0559d93efd1..e0306e78e34b 100644 --- a/Documentation/driver-api/gpio/legacy.rst +++ b/Documentation/driver-api/gpio/legacy.rst @@ -238,8 +238,6 @@ setup or driver probe/teardown code, so this is an easy constraint.):: ## gpio_free_array() gpio_free() - gpio_set_debounce() - Claiming and Releasing GPIOs diff --git a/Documentation/translations/zh_CN/driver-api/gpio/legacy.rst b/Documentation/translations/zh_CN/driver-api/gpio/legacy.rst index 74fa473bb504..dee2a0517c1c 100644 --- a/Documentation/translations/zh_CN/driver-api/gpio/legacy.rst +++ b/Documentation/translations/zh_CN/driver-api/gpio/legacy.rst @@ -219,7 +219,6 @@ GPIO 值的命令需要等待其信息排到队首才发送命令，再获得其 ## gpio_free_array() gpio_free() - gpio_set_debounce() diff --git a/Documentation/translations/zh_TW/gpio.txt b/Documentation/translations/zh_TW/gpio.txt index 1b986bbb0909..dc608358d90a 100644 --- a/Documentation/translations/zh_TW/gpio.txt +++ b/Documentation/translations/zh_TW/gpio.txt @@ -226,7 +226,6 @@ GPIO 值的命令需要等待其信息排到隊首才發送命令，再獲得其 ## gpio_free_array() gpio_free() - gpio_set_debounce() diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c index 17f11bce8113..bb1058b1e7fd 100644 --- a/drivers/input/touchscreen/ads7846.c +++ b/drivers/input/touchscreen/ads7846.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #include #include @@ -1012,8 +1013,8 @@ static int ads7846_setup_pendown(struct spi_device *spi, ts->gpio_pendown = pdata->gpio_pendown; if (pdata->gpio_pendown_debounce) - gpio_set_debounce(pdata->gpio_pendown, - pdata->gpio_pendown_debounce); + gpiod_set_debounce(gpio_to_desc(ts->gpio_pendown), + pdata->gpio_pendown_debounce); } else { dev_err(&spi->dev, "no get_pendown_state nor gpio_pendown?\n"); return -EINVAL; diff --git a/include/linux/gpio.h b/include/linux/gpio.h index d5ce78e2bdd9..fc56733e8514 100644 --- a/include/linux/gpio.h +++ b/include/linux/gpio.h @@ -100,11 +100,6 @@ static inline int gpio_direction_output(unsigned gpio, int value) return gpiod_direction_output_raw(gpio_to_desc(gpio), value); } -static inline int gpio_set_debounce(unsigned gpio, unsigned debounce) -{ - return gpiod_set_debounce(gpio_to_desc(gpio), debounce); -} - static inline int gpio_get_value_cansleep(unsigned gpio) { return gpiod_get_raw_value_cansleep(gpio_to_desc(gpio)); @@ -214,11 +209,6 @@ static inline int gpio_direction_output(unsigned gpio, int value) return -ENOSYS; } -static inline int gpio_set_debounce(unsigned gpio, unsigned debounce) -{ - return -ENOSYS; -} - static inline int gpio_get_value(unsigned gpio) { /* GPIO can never have been requested or set as {in,out}put */ -- cgit v1.2.3 From d74e316633e49f44756c23997fa071979a939405 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Tue, 7 Feb 2023 16:29:45 +0200 Subject: gpiolib: remove legacy gpio_export() There are only a handful of users of gpio_export() and related functions. As these are just wrappers around the modern gpiod_export() helper, remove the wrappers and open-code the gpio_to_desc in all callers to shrink the legacy API. Reviewed-by: Andy Shevchenko Signed-off-by: Arnd Bergmann Reviewed-by: Linus Walleij Signed-off-by: Andy Shevchenko --- Documentation/admin-guide/gpio/sysfs.rst | 2 +- Documentation/driver-api/gpio/legacy.rst | 21 ----------------- .../translations/zh_CN/driver-api/gpio/legacy.rst | 19 --------------- Documentation/translations/zh_TW/gpio.txt | 18 --------------- arch/arm/mach-omap2/pdata-quirks.c | 9 ++++---- arch/sh/boards/mach-ap325rxa/setup.c | 7 +++--- drivers/gpio/gpiolib-sysfs.c | 4 ++-- drivers/media/pci/sta2x11/sta2x11_vip.c | 10 +++++--- drivers/net/ieee802154/ca8210.c | 3 ++- include/linux/gpio.h | 27 ---------------------- 10 files changed, 21 insertions(+), 99 deletions(-) (limited to 'include') diff --git a/Documentation/admin-guide/gpio/sysfs.rst b/Documentation/admin-guide/gpio/sysfs.rst index ec09ffd983e7..35171d15f78d 100644 --- a/Documentation/admin-guide/gpio/sysfs.rst +++ b/Documentation/admin-guide/gpio/sysfs.rst @@ -145,7 +145,7 @@ requested using gpio_request():: /* export the GPIO to userspace */ int gpiod_export(struct gpio_desc *desc, bool direction_may_change); - /* reverse gpio_export() */ + /* reverse gpiod_export() */ void gpiod_unexport(struct gpio_desc *desc); /* create a sysfs link to an exported GPIO node */ diff --git a/Documentation/driver-api/gpio/legacy.rst b/Documentation/driver-api/gpio/legacy.rst index e0306e78e34b..78372853c6d4 100644 --- a/Documentation/driver-api/gpio/legacy.rst +++ b/Documentation/driver-api/gpio/legacy.rst @@ -714,27 +714,6 @@ gpiochip nodes (possibly in conjunction with schematics) to determine the correct GPIO number to use for a given signal. -Exporting from Kernel code --------------------------- -Kernel code can explicitly manage exports of GPIOs which have already been -requested using gpio_request():: - - /* export the GPIO to userspace */ - int gpio_export(unsigned gpio, bool direction_may_change); - - /* reverse gpio_export() */ - void gpio_unexport(); - -After a kernel driver requests a GPIO, it may only be made available in -the sysfs interface by gpio_export(). The driver can control whether the -signal direction may change. This helps drivers prevent userspace code -from accidentally clobbering important system state. - -This explicit exporting can help with debugging (by making some kinds -of experiments easier), or can provide an always-there interface that's -suitable for documenting as part of a board support package. - - API Reference ============= diff --git a/Documentation/translations/zh_CN/driver-api/gpio/legacy.rst b/Documentation/translations/zh_CN/driver-api/gpio/legacy.rst index dee2a0517c1c..84ce2322fdba 100644 --- a/Documentation/translations/zh_CN/driver-api/gpio/legacy.rst +++ b/Documentation/translations/zh_CN/driver-api/gpio/legacy.rst @@ -653,25 +653,6 @@ GPIO 控制器的路径类似 /sys/class/gpio/gpiochip42/ (对于从#42 GPIO 确定给定信号所用的 GPIO 编号。 -从内核代码中导出 ----------------- - -内核代码可以明确地管理那些已通过 gpio_request()申请的 GPIO 的导出:: - - /* 导出 GPIO 到用户空间 */ - int gpio_export(unsigned gpio, bool direction_may_change); - - /* gpio_export()的逆操作 */ - void gpio_unexport(); - -在一个内核驱动申请一个 GPIO 之后，它可以通过 gpio_export()使其在 sysfs -接口中可见。该驱动可以控制信号方向是否可修改。这有助于防止用户空间代码无意间 -破坏重要的系统状态。 - -这个明确的导出有助于(通过使某些实验更容易来)调试，也可以提供一个始终存在的接口， -与文档配合作为板级支持包的一部分。 - - API参考 ======= diff --git a/Documentation/translations/zh_TW/gpio.txt b/Documentation/translations/zh_TW/gpio.txt index dc608358d90a..62e560ffe628 100644 --- a/Documentation/translations/zh_TW/gpio.txt +++ b/Documentation/translations/zh_TW/gpio.txt @@ -614,21 +614,3 @@ GPIO 控制器的路徑類似 /sys/class/gpio/gpiochip42/ (對於從#42 GPIO 固定的,例如在擴展卡上的 GPIO會根據所使用的主板或所在堆疊架構中其他的板子而 有所不同。在這種情況下,你可能需要使用 gpiochip 節點(儘可能地結合電路圖)來 確定給定信號所用的 GPIO 編號。 - - -從內核代碼中導出 -------------- -內核代碼可以明確地管理那些已通過 gpio_request()申請的 GPIO 的導出: - - /* 導出 GPIO 到用戶空間 */ - int gpio_export(unsigned gpio, bool direction_may_change); - - /* gpio_export()的逆操作 */ - void gpio_unexport(); - -在一個內核驅動申請一個 GPIO 之後，它可以通過 gpio_export()使其在 sysfs -接口中可見。該驅動可以控制信號方向是否可修改。這有助於防止用戶空間代碼無意間 -破壞重要的系統狀態。 - -這個明確的導出有助於(通過使某些實驗更容易來)調試，也可以提供一個始終存在的接口， -與文檔配合作爲板級支持包的一部分。 diff --git a/arch/arm/mach-omap2/pdata-quirks.c b/arch/arm/mach-omap2/pdata-quirks.c index baba73fd6f11..04208cc52784 100644 --- a/arch/arm/mach-omap2/pdata-quirks.c +++ b/arch/arm/mach-omap2/pdata-quirks.c @@ -6,6 +6,7 @@ */ #include #include +#include #include #include #include @@ -108,7 +109,7 @@ static int omap3_sbc_t3730_twl_callback(struct device *dev, if (res) return res; - gpio_export(gpio, 0); + gpiod_export(gpio_to_desc(gpio), 0); return 0; } @@ -123,7 +124,7 @@ static void __init omap3_sbc_t3x_usb_hub_init(int gpio, char *hub_name) return; } - gpio_export(gpio, 0); + gpiod_export(gpio_to_desc(gpio), 0); udelay(10); gpio_set_value(gpio, 1); @@ -200,8 +201,8 @@ static void __init omap3_sbc_t3517_wifi_init(void) return; } - gpio_export(cm_t3517_wlan_gpios[0].gpio, 0); - gpio_export(cm_t3517_wlan_gpios[1].gpio, 0); + gpiod_export(gpio_to_desc(cm_t3517_wlan_gpios[0].gpio), 0); + gpiod_export(gpio_to_desc(cm_t3517_wlan_gpios[1].gpio), 0); msleep(100); gpio_set_value(cm_t3517_wlan_gpios[1].gpio, 0); diff --git a/arch/sh/boards/mach-ap325rxa/setup.c b/arch/sh/boards/mach-ap325rxa/setup.c index c77b5f00a66a..151792162152 100644 --- a/arch/sh/boards/mach-ap325rxa/setup.c +++ b/arch/sh/boards/mach-ap325rxa/setup.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include #include @@ -411,16 +412,16 @@ static int __init ap325rxa_devices_setup(void) /* LD3 and LD4 LEDs */ gpio_request(GPIO_PTX5, NULL); /* RUN */ gpio_direction_output(GPIO_PTX5, 1); - gpio_export(GPIO_PTX5, 0); + gpiod_export(gpio_to_desc(GPIO_PTX5), 0); gpio_request(GPIO_PTX4, NULL); /* INDICATOR */ gpio_direction_output(GPIO_PTX4, 0); - gpio_export(GPIO_PTX4, 0); + gpiod_export(gpio_to_desc(GPIO_PTX4), 0); /* SW1 input */ gpio_request(GPIO_PTF7, NULL); /* MODE */ gpio_direction_input(GPIO_PTF7); - gpio_export(GPIO_PTF7, 0); + gpiod_export(gpio_to_desc(GPIO_PTF7), 0); /* LCDC */ gpio_request(GPIO_FN_LCDD15, NULL); diff --git a/drivers/gpio/gpiolib-sysfs.c b/drivers/gpio/gpiolib-sysfs.c index cd27bf173dec..6e4267944f80 100644 --- a/drivers/gpio/gpiolib-sysfs.c +++ b/drivers/gpio/gpiolib-sysfs.c @@ -491,7 +491,7 @@ static ssize_t unexport_store(struct class *class, goto done; desc = gpio_to_desc(gpio); - /* reject bogus commands (gpio_unexport ignores them) */ + /* reject bogus commands (gpiod_unexport() ignores them) */ if (!desc) { pr_warn("%s: invalid GPIO %ld\n", __func__, gpio); return -EINVAL; @@ -790,7 +790,7 @@ static int __init gpiolib_sysfs_init(void) * early (e.g. before the class_register above was called). * * We run before arch_initcall() so chip->dev nodes can have - * registered, and so arch_initcall() can always gpio_export(). + * registered, and so arch_initcall() can always gpiod_export(). */ spin_lock_irqsave(&gpio_lock, flags); list_for_each_entry(gdev, &gpio_devices, list) { diff --git a/drivers/media/pci/sta2x11/sta2x11_vip.c b/drivers/media/pci/sta2x11/sta2x11_vip.c index 8535e49a4c4f..e4cf9d63e926 100644 --- a/drivers/media/pci/sta2x11/sta2x11_vip.c +++ b/drivers/media/pci/sta2x11/sta2x11_vip.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include #include @@ -889,6 +890,7 @@ static int sta2x11_vip_init_controls(struct sta2x11_vip *vip) static int vip_gpio_reserve(struct device *dev, int pin, int dir, const char *name) { + struct gpio_desc *desc = gpio_to_desc(pin); int ret = -ENODEV; if (!gpio_is_valid(pin)) @@ -900,7 +902,7 @@ static int vip_gpio_reserve(struct device *dev, int pin, int dir, return ret; } - ret = gpio_direction_output(pin, dir); + ret = gpiod_direction_output(desc, dir); if (ret) { dev_err(dev, "Failed to set direction for pin %d (%s)\n", pin, name); @@ -908,7 +910,7 @@ static int vip_gpio_reserve(struct device *dev, int pin, int dir, return ret; } - ret = gpio_export(pin, false); + ret = gpiod_export(desc, false); if (ret) { dev_err(dev, "Failed to export pin %d (%s)\n", pin, name); gpio_free(pin); @@ -928,8 +930,10 @@ static int vip_gpio_reserve(struct device *dev, int pin, int dir, static void vip_gpio_release(struct device *dev, int pin, const char *name) { if (gpio_is_valid(pin)) { + struct gpio_desc *desc = gpio_to_desc(pin); + dev_dbg(dev, "releasing pin %d (%s)\n", pin, name); - gpio_unexport(pin); + gpiod_unexport(desc); gpio_free(pin); } } diff --git a/drivers/net/ieee802154/ca8210.c b/drivers/net/ieee802154/ca8210.c index e1a569b99e4a..5c0be6a3ec5e 100644 --- a/drivers/net/ieee802154/ca8210.c +++ b/drivers/net/ieee802154/ca8210.c @@ -51,6 +51,7 @@ #include #include #include +#include #include #include #include @@ -2853,7 +2854,7 @@ static int ca8210_interrupt_init(struct spi_device *spi) ); if (ret) { dev_crit(&spi->dev, "request_irq %d failed\n", pdata->irq_id); - gpio_unexport(pdata->gpio_irq); + gpiod_unexport(gpio_to_desc(pdata->gpio_irq)); gpio_free(pdata->gpio_irq); } diff --git a/include/linux/gpio.h b/include/linux/gpio.h index fc56733e8514..a86953696e47 100644 --- a/include/linux/gpio.h +++ b/include/linux/gpio.h @@ -132,20 +132,6 @@ int gpio_request_one(unsigned gpio, unsigned long flags, const char *label); int gpio_request_array(const struct gpio *array, size_t num); void gpio_free_array(const struct gpio *array, size_t num); -/* - * A sysfs interface can be exported by individual drivers if they want, - * but more typically is configured entirely from userspace. - */ -static inline int gpio_export(unsigned gpio, bool direction_may_change) -{ - return gpiod_export(gpio_to_desc(gpio), direction_may_change); -} - -static inline void gpio_unexport(unsigned gpio) -{ - gpiod_unexport(gpio_to_desc(gpio)); -} - /* CONFIG_GPIOLIB: bindings for managed devices that want to request gpios */ struct device; @@ -242,19 +228,6 @@ static inline void gpio_set_value_cansleep(unsigned gpio, int value) WARN_ON(1); } -static inline int gpio_export(unsigned gpio, bool direction_may_change) -{ - /* GPIO can never have been requested or set as {in,out}put */ - WARN_ON(1); - return -EINVAL; -} - -static inline void gpio_unexport(unsigned gpio) -{ - /* GPIO can never have been exported */ - WARN_ON(1); -} - static inline int gpio_to_irq(unsigned gpio) { /* GPIO can never have been requested or set as input */ -- cgit v1.2.3 From a8e59744e16b9ae18fab773a0fd3b23cdf21ad75 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Wed, 8 Feb 2023 17:41:47 +0200 Subject: gpiolib: split linux/gpio/driver.h out of linux/gpio.h Almost all gpio drivers include linux/gpio/driver.h, and other files should not rely on includes from this header. Remove the indirect include from here and include the correct headers directly from where they are used. Reviewed-by: Andy Shevchenko Signed-off-by: Arnd Bergmann Reviewed-by: Linus Walleij Signed-off-by: Andy Shevchenko Acked-by: Lee Jones --- arch/arm/mach-omap1/irq.c | 1 + arch/arm/mach-orion5x/board-rd88f5182.c | 1 + arch/arm/mach-sa1100/assabet.c | 1 + drivers/net/wireless/broadcom/brcm80211/brcmsmac/led.c | 1 + include/linux/mfd/ucb1x00.h | 1 + 5 files changed, 5 insertions(+) (limited to 'include') diff --git a/arch/arm/mach-omap1/irq.c b/arch/arm/mach-omap1/irq.c index 9ccc784fd614..bfc7ab010ae2 100644 --- a/arch/arm/mach-omap1/irq.c +++ b/arch/arm/mach-omap1/irq.c @@ -41,6 +41,7 @@ #include #include #include +#include #include #include diff --git a/arch/arm/mach-orion5x/board-rd88f5182.c b/arch/arm/mach-orion5x/board-rd88f5182.c index 596601367989..1c14e49a90a6 100644 --- a/arch/arm/mach-orion5x/board-rd88f5182.c +++ b/arch/arm/mach-orion5x/board-rd88f5182.c @@ -9,6 +9,7 @@ #include #include #include +#include #include #include #include diff --git a/arch/arm/mach-sa1100/assabet.c b/arch/arm/mach-sa1100/assabet.c index 2eba112f2ad8..d000c678b439 100644 --- a/arch/arm/mach-sa1100/assabet.c +++ b/arch/arm/mach-sa1100/assabet.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include #include diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmsmac/led.c b/drivers/net/wireless/broadcom/brcm80211/brcmsmac/led.c index 9540a05247c2..89c8829528c2 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmsmac/led.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmsmac/led.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 #include #include +#include #include #include #include diff --git a/include/linux/mfd/ucb1x00.h b/include/linux/mfd/ucb1x00.h index 43bcf35afe27..ede237384723 100644 --- a/include/linux/mfd/ucb1x00.h +++ b/include/linux/mfd/ucb1x00.h @@ -10,6 +10,7 @@ #include #include #include +#include #include #define UCB_IO_DATA 0x00 -- cgit v1.2.3 From a99cc66807d6c854a7f65f962766c530c91be149 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Tue, 7 Feb 2023 16:29:47 +0200 Subject: gpiolib: split of_mm_gpio_chip out of linux/of_gpio.h This is a rarely used feature that has nothing to do with the client-side of_gpio.h. Split it out with a separate header file and Kconfig option so it can be removed on its own timeline aside from removing the of_gpio consumer interfaces. Reviewed-by: Andy Shevchenko Signed-off-by: Arnd Bergmann Reviewed-by: Linus Walleij Signed-off-by: Andy Shevchenko --- arch/powerpc/platforms/44x/Kconfig | 1 + arch/powerpc/platforms/4xx/gpio.c | 2 +- arch/powerpc/platforms/8xx/Kconfig | 1 + arch/powerpc/platforms/8xx/cpm1.c | 2 +- arch/powerpc/platforms/Kconfig | 2 ++ arch/powerpc/sysdev/cpm_common.c | 2 +- drivers/gpio/Kconfig | 11 +++++++++ drivers/gpio/TODO | 15 ++++++++----- drivers/gpio/gpio-altera.c | 2 +- drivers/gpio/gpio-mm-lantiq.c | 2 +- drivers/gpio/gpio-mpc5200.c | 2 +- drivers/gpio/gpiolib-of.c | 3 +++ drivers/soc/fsl/qe/gpio.c | 2 +- include/linux/gpio/legacy-of-mm-gpiochip.h | 36 ++++++++++++++++++++++++++++++ include/linux/of_gpio.h | 21 ----------------- 15 files changed, 71 insertions(+), 33 deletions(-) create mode 100644 include/linux/gpio/legacy-of-mm-gpiochip.h (limited to 'include') diff --git a/arch/powerpc/platforms/44x/Kconfig b/arch/powerpc/platforms/44x/Kconfig index 25b80cd558f8..1624ebf95497 100644 --- a/arch/powerpc/platforms/44x/Kconfig +++ b/arch/powerpc/platforms/44x/Kconfig @@ -230,6 +230,7 @@ config PPC4xx_GPIO bool "PPC4xx GPIO support" depends on 44x select GPIOLIB + select OF_GPIO_MM_GPIOCHIP help Enable gpiolib support for ppc440 based boards diff --git a/arch/powerpc/platforms/4xx/gpio.c b/arch/powerpc/platforms/4xx/gpio.c index 49ee8d365852..e5f2319e5cbe 100644 --- a/arch/powerpc/platforms/4xx/gpio.c +++ b/arch/powerpc/platforms/4xx/gpio.c @@ -14,7 +14,7 @@ #include #include #include -#include +#include #include #include #include diff --git a/arch/powerpc/platforms/8xx/Kconfig b/arch/powerpc/platforms/8xx/Kconfig index 60cc5b537a98..a14d9d8997a4 100644 --- a/arch/powerpc/platforms/8xx/Kconfig +++ b/arch/powerpc/platforms/8xx/Kconfig @@ -101,6 +101,7 @@ comment "Generic MPC8xx Options" config 8xx_GPIO bool "GPIO API Support" select GPIOLIB + select OF_GPIO_MM_GPIOCHIP help Saying Y here will cause the ports on an MPC8xx processor to be used with the GPIO API. If you say N here, the kernel needs less memory. diff --git a/arch/powerpc/platforms/8xx/cpm1.c b/arch/powerpc/platforms/8xx/cpm1.c index bb38c8d8f8de..56ca14f77543 100644 --- a/arch/powerpc/platforms/8xx/cpm1.c +++ b/arch/powerpc/platforms/8xx/cpm1.c @@ -44,7 +44,7 @@ #include #ifdef CONFIG_8xx_GPIO -#include +#include #endif #define CPM_MAP_SIZE (0x4000) diff --git a/arch/powerpc/platforms/Kconfig b/arch/powerpc/platforms/Kconfig index d41dad227de8..8e4bbd19dec5 100644 --- a/arch/powerpc/platforms/Kconfig +++ b/arch/powerpc/platforms/Kconfig @@ -244,6 +244,7 @@ config QE_GPIO bool "QE GPIO support" depends on QUICC_ENGINE select GPIOLIB + select OF_GPIO_MM_GPIOCHIP help Say Y here if you're going to use hardware that connects to the QE GPIOs. @@ -254,6 +255,7 @@ config CPM2 select CPM select HAVE_PCI select GPIOLIB + select OF_GPIO_MM_GPIOCHIP help The CPM2 (Communications Processor Module) is a coprocessor on embedded CPUs made by Freescale. Selecting this option means that diff --git a/arch/powerpc/sysdev/cpm_common.c b/arch/powerpc/sysdev/cpm_common.c index 7dc1960f8bdb..8234013a8772 100644 --- a/arch/powerpc/sysdev/cpm_common.c +++ b/arch/powerpc/sysdev/cpm_common.c @@ -31,7 +31,7 @@ #include #if defined(CONFIG_CPM2) || defined(CONFIG_8xx_GPIO) -#include +#include #endif static int __init cpm_init(void) diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index df82fb7eb0eb..2b72a7a7084a 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -39,6 +39,14 @@ config GPIOLIB_IRQCHIP select IRQ_DOMAIN bool +config OF_GPIO_MM_GPIOCHIP + bool + help + This adds support for the legacy 'struct of_mm_gpio_chip' interface + from PowerPC. Existing drivers using this interface need to select + this symbol, but new drivers should use the generic gpio-regmap + infrastructure instead. + config DEBUG_GPIO bool "Debug GPIO calls" depends on DEBUG_KERNEL @@ -131,6 +139,7 @@ config GPIO_ALTERA tristate "Altera GPIO" depends on OF_GPIO select GPIOLIB_IRQCHIP + select OF_GPIO_MM_GPIOCHIP help Say Y or M here to build support for the Altera PIO device. @@ -403,6 +412,7 @@ config GPIO_MENZ127 config GPIO_MM_LANTIQ bool "Lantiq Memory mapped GPIOs" depends on LANTIQ && SOC_XWAY + select OF_GPIO_MM_GPIOCHIP help This enables support for memory mapped GPIOs on the External Bus Unit (EBU) found on Lantiq SoCs. The GPIOs are output only as they are @@ -411,6 +421,7 @@ config GPIO_MM_LANTIQ config GPIO_MPC5200 def_bool y depends on PPC_MPC52xx + select OF_GPIO_MM_GPIOCHIP config GPIO_MPC8XXX bool "MPC512x/MPC8xxx/QorIQ GPIO support" diff --git a/drivers/gpio/TODO b/drivers/gpio/TODO index 68ada1066941..189c3abe7e79 100644 --- a/drivers/gpio/TODO +++ b/drivers/gpio/TODO @@ -59,11 +59,6 @@ the device tree back-end. It is legacy and should not be used in new code. Work items: -- Get rid of struct of_mm_gpio_chip altogether: use the generic MMIO - GPIO for all current users (see below). Delete struct of_mm_gpio_chip, - to_of_mm_gpio_chip(), of_mm_gpiochip_add_data(), of_mm_gpiochip_remove() - from the kernel. - - Change all consumer drivers that #include to #include and stop doing custom parsing of the GPIO lines from the device tree. This can be tricky and often ivolves @@ -81,6 +76,16 @@ Work items: uses or instead. +Get rid of + +Work items: + +- Get rid of struct of_mm_gpio_chip altogether: use the generic MMIO + GPIO for all current users (see below). Delete struct of_mm_gpio_chip, + to_of_mm_gpio_chip(), of_mm_gpiochip_add_data(), of_mm_gpiochip_remove(), + CONFIG_OF_GPIO_MM_GPIOCHIP from the kernel. + + Get rid of This legacy header is a one stop shop for anything GPIO is closely tied diff --git a/drivers/gpio/gpio-altera.c b/drivers/gpio/gpio-altera.c index b59fae993626..99e137f8097e 100644 --- a/drivers/gpio/gpio-altera.c +++ b/drivers/gpio/gpio-altera.c @@ -7,7 +7,7 @@ #include #include #include -#include /* For of_mm_gpio_chip */ +#include #include #define ALTERA_GPIO_MAX_NGPIO 32 diff --git a/drivers/gpio/gpio-mm-lantiq.c b/drivers/gpio/gpio-mm-lantiq.c index 538e31fe8903..27ff84c5d162 100644 --- a/drivers/gpio/gpio-mm-lantiq.c +++ b/drivers/gpio/gpio-mm-lantiq.c @@ -10,8 +10,8 @@ #include #include #include +#include #include -#include #include #include diff --git a/drivers/gpio/gpio-mpc5200.c b/drivers/gpio/gpio-mpc5200.c index 000494e0c533..3b0bfff8c778 100644 --- a/drivers/gpio/gpio-mpc5200.c +++ b/drivers/gpio/gpio-mpc5200.c @@ -8,7 +8,7 @@ #include #include #include -#include +#include #include #include #include diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c index 266352b1a966..0f699af438b0 100644 --- a/drivers/gpio/gpiolib-of.c +++ b/drivers/gpio/gpiolib-of.c @@ -892,6 +892,8 @@ static int of_gpio_simple_xlate(struct gpio_chip *gc, return gpiospec->args[0]; } +#if IS_ENABLED(CONFIG_OF_GPIO_MM_GPIOCHIP) +#include /** * of_mm_gpiochip_add_data - Add memory mapped GPIO chip (bank) * @np: device node of the GPIO chip @@ -964,6 +966,7 @@ void of_mm_gpiochip_remove(struct of_mm_gpio_chip *mm_gc) kfree(gc->label); } EXPORT_SYMBOL_GPL(of_mm_gpiochip_remove); +#endif #ifdef CONFIG_PINCTRL static int of_gpiochip_add_pin_range(struct gpio_chip *chip) diff --git a/drivers/soc/fsl/qe/gpio.c b/drivers/soc/fsl/qe/gpio.c index 1c41eb49d5a7..3ef24ba0245b 100644 --- a/drivers/soc/fsl/qe/gpio.c +++ b/drivers/soc/fsl/qe/gpio.c @@ -13,7 +13,7 @@ #include #include #include -#include /* for of_mm_gpio_chip */ +#include #include #include #include diff --git a/include/linux/gpio/legacy-of-mm-gpiochip.h b/include/linux/gpio/legacy-of-mm-gpiochip.h new file mode 100644 index 000000000000..2e2bd3b19cc3 --- /dev/null +++ b/include/linux/gpio/legacy-of-mm-gpiochip.h @@ -0,0 +1,36 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * OF helpers for the old of_mm_gpio_chip, used on ppc32 and nios2, + * do not use in new code. + * + * Copyright (c) 2007-2008 MontaVista Software, Inc. + * + * Author: Anton Vorontsov + */ + +#ifndef __LINUX_GPIO_LEGACY_OF_MM_GPIO_CHIP_H +#define __LINUX_GPIO_LEGACY_OF_MM_GPIO_CHIP_H + +#include +#include + +/* + * OF GPIO chip for memory mapped banks + */ +struct of_mm_gpio_chip { + struct gpio_chip gc; + void (*save_regs)(struct of_mm_gpio_chip *mm_gc); + void __iomem *regs; +}; + +static inline struct of_mm_gpio_chip *to_of_mm_gpio_chip(struct gpio_chip *gc) +{ + return container_of(gc, struct of_mm_gpio_chip, gc); +} + +extern int of_mm_gpiochip_add_data(struct device_node *np, + struct of_mm_gpio_chip *mm_gc, + void *data); +extern void of_mm_gpiochip_remove(struct of_mm_gpio_chip *mm_gc); + +#endif /* __LINUX_GPIO_LEGACY_OF_MM_GPIO_CHIP_H */ diff --git a/include/linux/of_gpio.h b/include/linux/of_gpio.h index 5d58b3b0a97e..d0f66a5e1b2a 100644 --- a/include/linux/of_gpio.h +++ b/include/linux/of_gpio.h @@ -19,30 +19,9 @@ struct device_node; #ifdef CONFIG_OF_GPIO -#include - -/* - * OF GPIO chip for memory mapped banks - */ -struct of_mm_gpio_chip { - struct gpio_chip gc; - void (*save_regs)(struct of_mm_gpio_chip *mm_gc); - void __iomem *regs; -}; - -static inline struct of_mm_gpio_chip *to_of_mm_gpio_chip(struct gpio_chip *gc) -{ - return container_of(gc, struct of_mm_gpio_chip, gc); -} - extern int of_get_named_gpio(const struct device_node *np, const char *list_name, int index); -extern int of_mm_gpiochip_add_data(struct device_node *np, - struct of_mm_gpio_chip *mm_gc, - void *data); -extern void of_mm_gpiochip_remove(struct of_mm_gpio_chip *mm_gc); - #else /* CONFIG_OF_GPIO */ #include -- cgit v1.2.3 From 6cfd84c4f4f61905088b642a3ef1038ee627cd98 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Tue, 7 Feb 2023 16:29:49 +0200 Subject: gpiolib: Drop unused forward declaration from driver.h There is no struct device_node pointers anywhere in the header, drop unused forward declaration. Signed-off-by: Andy Shevchenko --- include/linux/gpio/driver.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include') diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index ccd8a512d854..262a84ce9bcb 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -16,7 +16,6 @@ struct gpio_desc; struct of_phandle_args; -struct device_node; struct seq_file; struct gpio_device; struct module; -- cgit v1.2.3 From 91e5ae95a0af7d2db9e98e8f99436c02c304378b Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Tue, 7 Feb 2023 16:29:50 +0200 Subject: gpiolib: Deduplicate forward declarations in consumer.h The struct fwnode_handle pointer is used in both branches of ifdeffery, no need to have a copy of the same in each of them, just make it global. Signed-off-by: Andy Shevchenko --- include/linux/gpio/consumer.h | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) (limited to 'include') diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h index 59cb20cfac3d..a7eb8aa1e54c 100644 --- a/include/linux/gpio/consumer.h +++ b/include/linux/gpio/consumer.h @@ -8,6 +8,7 @@ #include struct device; +struct fwnode_handle; struct gpio_desc; struct gpio_array; @@ -171,9 +172,6 @@ int gpiod_set_consumer_name(struct gpio_desc *desc, const char *name); struct gpio_desc *gpio_to_desc(unsigned gpio); int desc_to_gpio(const struct gpio_desc *desc); -/* Child properties interface */ -struct fwnode_handle; - struct gpio_desc *fwnode_gpiod_get_index(struct fwnode_handle *fwnode, const char *con_id, int index, enum gpiod_flags flags, @@ -546,9 +544,6 @@ static inline int desc_to_gpio(const struct gpio_desc *desc) return -EINVAL; } -/* Child properties interface */ -struct fwnode_handle; - static inline struct gpio_desc *fwnode_gpiod_get_index(struct fwnode_handle *fwnode, const char *con_id, int index, -- cgit v1.2.3 From 5b1911976ccf83e892452afb0363500228b35d81 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Tue, 7 Feb 2023 16:29:51 +0200 Subject: gpiolib: Group forward declarations in consumer.h For better maintenance group the forward declarations together. Signed-off-by: Andy Shevchenko --- include/linux/gpio/consumer.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'include') diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h index a7eb8aa1e54c..5432e5d5fbfb 100644 --- a/include/linux/gpio/consumer.h +++ b/include/linux/gpio/consumer.h @@ -7,6 +7,7 @@ #include #include +struct acpi_device; struct device; struct fwnode_handle; struct gpio_desc; @@ -602,8 +603,6 @@ struct acpi_gpio_mapping { unsigned int quirks; }; -struct acpi_device; - #if IS_ENABLED(CONFIG_GPIOLIB) && IS_ENABLED(CONFIG_ACPI) int acpi_dev_add_driver_gpios(struct acpi_device *adev, -- cgit v1.2.3 From 380c7ba3923c6e471aff0f951a6cf42e8dec2c79 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Wed, 8 Feb 2023 19:07:28 +0200 Subject: gpiolib: Clean up headers There is a few things done: - include only the headers we are direct user of - when pointer is in use, provide a forward declaration - add missing headers - group generic headers and subsystem headers - sort each group alphabetically Signed-off-by: Andy Shevchenko --- drivers/gpio/gpiolib-acpi.c | 10 ++++++---- drivers/gpio/gpiolib-acpi.h | 1 - drivers/gpio/gpiolib-of.c | 6 ++++-- drivers/gpio/gpiolib-of.h | 1 - drivers/gpio/gpiolib-swnode.c | 5 +++-- drivers/gpio/gpiolib-sysfs.c | 21 ++++++++++++++++----- drivers/gpio/gpiolib.c | 9 ++++++--- include/linux/gpio.h | 10 ++++------ include/linux/gpio/consumer.h | 14 ++++++++++---- include/linux/gpio/driver.h | 30 +++++++++++++++++++++++------- 10 files changed, 72 insertions(+), 35 deletions(-) (limited to 'include') diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c index d8a421ce26a8..0605399c84e7 100644 --- a/drivers/gpio/gpiolib-acpi.c +++ b/drivers/gpio/gpiolib-acpi.c @@ -7,17 +7,19 @@ * Mika Westerberg */ +#include #include #include -#include -#include -#include #include -#include #include +#include #include #include +#include +#include +#include + #include "gpiolib.h" #include "gpiolib-acpi.h" diff --git a/drivers/gpio/gpiolib-acpi.h b/drivers/gpio/gpiolib-acpi.h index 90fd6b04f24d..0fcd7e14d7f9 100644 --- a/drivers/gpio/gpiolib-acpi.h +++ b/drivers/gpio/gpiolib-acpi.h @@ -9,7 +9,6 @@ #define GPIOLIB_ACPI_H #include -#include #include #include diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c index 0f699af438b0..1436cdb5fa26 100644 --- a/drivers/gpio/gpiolib-of.c +++ b/drivers/gpio/gpiolib-of.c @@ -10,14 +10,16 @@ #include #include #include -#include #include -#include +#include #include #include #include #include #include +#include + +#include #include #include "gpiolib.h" diff --git a/drivers/gpio/gpiolib-of.h b/drivers/gpio/gpiolib-of.h index e5bb065d82ef..6b3a5347c5d9 100644 --- a/drivers/gpio/gpiolib-of.h +++ b/drivers/gpio/gpiolib-of.h @@ -4,7 +4,6 @@ #define GPIOLIB_OF_H #include -#include #include #include diff --git a/drivers/gpio/gpiolib-swnode.c b/drivers/gpio/gpiolib-swnode.c index dd9ccac214d1..b5a6eaf3729b 100644 --- a/drivers/gpio/gpiolib-swnode.c +++ b/drivers/gpio/gpiolib-swnode.c @@ -6,13 +6,14 @@ */ #include #include -#include -#include #include #include #include #include +#include +#include + #include "gpiolib.h" #include "gpiolib-swnode.h" diff --git a/drivers/gpio/gpiolib-sysfs.c b/drivers/gpio/gpiolib-sysfs.c index 6e4267944f80..c1cbf71329f0 100644 --- a/drivers/gpio/gpiolib-sysfs.c +++ b/drivers/gpio/gpiolib-sysfs.c @@ -1,18 +1,29 @@ // SPDX-License-Identifier: GPL-2.0 + +#include +#include #include +#include +#include +#include +#include +#include #include -#include +#include +#include +#include +#include #include +#include + #include #include -#include -#include -#include -#include #include "gpiolib.h" #include "gpiolib-sysfs.h" +struct kernfs_node; + #define GPIO_IRQF_TRIGGER_NONE 0 #define GPIO_IRQF_TRIGGER_FALLING BIT(0) #define GPIO_IRQF_TRIGGER_RISING BIT(1) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 19bd23044b01..700195a1faae 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -6,22 +6,25 @@ #include #include #include +#include #include #include -#include -#include -#include #include #include #include #include #include #include +#include #include #include #include #include +#include +#include +#include + #include #include "gpiolib-acpi.h" diff --git a/include/linux/gpio.h b/include/linux/gpio.h index a86953696e47..8528353e073b 100644 --- a/include/linux/gpio.h +++ b/include/linux/gpio.h @@ -12,9 +12,10 @@ #ifndef __LINUX_GPIO_H #define __LINUX_GPIO_H -#include #include +struct device; + /* see Documentation/driver-api/gpio/legacy.rst */ /* make these flag values available regardless of GPIO kconfig options */ @@ -134,19 +135,16 @@ void gpio_free_array(const struct gpio *array, size_t num); /* CONFIG_GPIOLIB: bindings for managed devices that want to request gpios */ -struct device; - int devm_gpio_request(struct device *dev, unsigned gpio, const char *label); int devm_gpio_request_one(struct device *dev, unsigned gpio, unsigned long flags, const char *label); #else /* ! CONFIG_GPIOLIB */ -#include #include -struct device; -struct gpio_chip; +#include +#include static inline bool gpio_is_valid(int number) { diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h index 5432e5d5fbfb..1c4385a00f88 100644 --- a/include/linux/gpio/consumer.h +++ b/include/linux/gpio/consumer.h @@ -3,15 +3,14 @@ #define __LINUX_GPIO_CONSUMER_H #include -#include -#include -#include +#include struct acpi_device; struct device; struct fwnode_handle; -struct gpio_desc; + struct gpio_array; +struct gpio_desc; /** * struct gpio_descs - Struct containing an array of descriptors that can be @@ -185,8 +184,11 @@ struct gpio_desc *devm_fwnode_gpiod_get_index(struct device *dev, #else /* CONFIG_GPIOLIB */ +#include #include +#include + static inline int gpiod_count(struct device *dev, const char *con_id) { return 0; @@ -616,6 +618,8 @@ struct gpio_desc *acpi_get_and_request_gpiod(char *path, unsigned int pin, char #else /* CONFIG_GPIOLIB && CONFIG_ACPI */ +#include + static inline int acpi_dev_add_driver_gpios(struct acpi_device *adev, const struct acpi_gpio_mapping *gpios) { @@ -647,6 +651,8 @@ void gpiod_unexport(struct gpio_desc *desc); #else /* CONFIG_GPIOLIB && CONFIG_GPIO_SYSFS */ +#include + static inline int gpiod_export(struct gpio_desc *desc, bool direction_may_change) { diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index 262a84ce9bcb..5c6db5533be6 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -2,27 +2,35 @@ #ifndef __LINUX_GPIO_DRIVER_H #define __LINUX_GPIO_DRIVER_H -#include -#include +#include #include #include +#include #include #include #include #include +#include #include +#ifdef CONFIG_GENERIC_MSI_IRQ #include +#endif -struct gpio_desc; +struct device; +struct irq_chip; +struct irq_data; +struct module; struct of_phandle_args; +struct pinctrl_dev; struct seq_file; -struct gpio_device; -struct module; -enum gpiod_flags; -enum gpio_lookup_flags; struct gpio_chip; +struct gpio_desc; +struct gpio_device; + +enum gpio_lookup_flags; +enum gpiod_flags; union gpio_irq_fwspec { struct irq_fwspec fwspec; @@ -679,6 +687,10 @@ bool gpiochip_irqchip_irq_valid(const struct gpio_chip *gc, int gpiochip_irqchip_add_domain(struct gpio_chip *gc, struct irq_domain *domain); #else + +#include +#include + static inline int gpiochip_irqchip_add_domain(struct gpio_chip *gc, struct irq_domain *domain) { @@ -756,6 +768,10 @@ struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc); #else /* CONFIG_GPIOLIB */ +#include + +#include + static inline struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc) { /* GPIO can never have been requested */ -- cgit v1.2.3