Message-Id: <20211109100207.2474024-5-arnd@kernel.org>
Date:   Tue,  9 Nov 2021 11:02:03 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     linux-gpio@...r.kernel.org
Cc:     Arnd Bergmann <arnd@...db.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 4/8] gpiolib: remove asm-generic/gpio.h

From: Arnd Bergmann <arnd@...db.de>

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 <arnd@...db.de>
---
 arch/m68k/include/asm/mcfgpio.h |   2 +-
 drivers/gpio/gpio-davinci.c     |   3 +-
 drivers/pinctrl/core.c          |   2 +-
 include/asm-generic/gpio.h      | 172 --------------------------------
 include/linux/gpio.h            | 116 +++++++++++++++++++--
 5 files changed, 110 insertions(+), 185 deletions(-)
 delete mode 100644 include/asm-generic/gpio.h

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 <asm-generic/gpio.h>
+#include <linux/gpio.h>
 #else
 
 int __mcfgpio_get_value(unsigned gpio);
diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c
index cb5afaa7ed48..8122c3a8d659 100644
--- a/drivers/gpio/gpio-davinci.c
+++ b/drivers/gpio/gpio-davinci.c
@@ -7,6 +7,7 @@
  */
 
 #include <linux/gpio/driver.h>
+#include <linux/gpio.h>
 #include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/clk.h>
@@ -23,8 +24,6 @@
 #include <linux/irqchip/chained_irq.h>
 #include <linux/spinlock.h>
 
-#include <asm-generic/gpio.h>
-
 #define MAX_REGS_BANKS 5
 #define MAX_INT_PER_BANK 32
 
diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index ffe39336fcac..976607758e98 100644
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -28,7 +28,7 @@
 
 #ifdef CONFIG_GPIOLIB
 #include "../gpio/gpiolib.h"
-#include <asm-generic/gpio.h>
+#include <linux/gpio.h>
 #endif
 
 #include "core.h"
diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h
deleted file mode 100644
index aea9aee1f3e9..000000000000
--- a/include/asm-generic/gpio.h
+++ /dev/null
@@ -1,172 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_GENERIC_GPIO_H
-#define _ASM_GENERIC_GPIO_H
-
-#include <linux/types.h>
-#include <linux/errno.h>
-
-#ifdef CONFIG_GPIOLIB
-
-#include <linux/compiler.h>
-#include <linux/gpio/driver.h>
-#include <linux/gpio/consumer.h>
-
-/* 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).
- *
- * While the GPIO programming interface defines valid GPIO numbers
- * to be in the range 0..MAX_INT, this library restricts them to the
- * smaller range 0..ARCH_NR_GPIOS-1.
- *
- * ARCH_NR_GPIOS is somewhat arbitrary; it usually reflects the sum of
- * builtin/SoC GPIOs plus a number of GPIOs on expanders; the latter is
- * actually an estimate of a board-specific value.
- */
-
-#ifndef ARCH_NR_GPIOS
-#if defined(CONFIG_ARCH_NR_GPIO) && CONFIG_ARCH_NR_GPIO > 0
-#define ARCH_NR_GPIOS CONFIG_ARCH_NR_GPIO
-#else
-#define ARCH_NR_GPIOS		512
-#endif
-#endif
-
-/*
- * "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)
-{
-	return number >= 0 && number < ARCH_NR_GPIOS;
-}
-
-struct device;
-struct gpio;
-struct seq_file;
-struct module;
-struct device_node;
-struct gpio_desc;
-
-/* caller holds gpio_lock *OR* gpio is marked as requested */
-static inline struct gpio_chip *gpio_to_chip(unsigned gpio)
-{
-	return gpiod_to_chip(gpio_to_desc(gpio));
-}
-
-/* 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 <asm/gpio.h> 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 int gpio_export_link(struct device *dev, const char *name,
-				   unsigned gpio)
-{
-	return gpiod_export_link(dev, name, gpio_to_desc(gpio));
-}
-
-static inline void gpio_unexport(unsigned gpio)
-{
-	gpiod_unexport(gpio_to_desc(gpio));
-}
-
-#else	/* !CONFIG_GPIOLIB */
-
-#include <linux/kernel.h>
-
-static inline bool gpio_is_valid(int number)
-{
-	/* only non-negative numbers are valid */
-	return number >= 0;
-}
-
-/* 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 */
-
-#endif /* _ASM_GENERIC_GPIO_H */
diff --git a/include/linux/gpio.h b/include/linux/gpio.h
index 7e6b1b8277ca..c19256f67e02 100644
--- a/include/linux/gpio.h
+++ b/include/linux/gpio.h
@@ -54,26 +54,124 @@ struct gpio {
 };
 
 #ifdef CONFIG_GPIOLIB
-#include <asm-generic/gpio.h>
 
-static inline int gpio_get_value(unsigned int gpio)
+#include <linux/compiler.h>
+#include <linux/gpio/driver.h>
+#include <linux/gpio/consumer.h>
+
+/* 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).
+ *
+ * While the GPIO programming interface defines valid GPIO numbers
+ * to be in the range 0..MAX_INT, this library restricts them to the
+ * smaller range 0..ARCH_NR_GPIOS-1.
+ *
+ * ARCH_NR_GPIOS is somewhat arbitrary; it usually reflects the sum of
+ * builtin/SoC GPIOs plus a number of GPIOs on expanders; the latter is
+ * actually an estimate of a board-specific value.
+ */
+
+#ifndef ARCH_NR_GPIOS
+#if defined(CONFIG_ARCH_NR_GPIO) && CONFIG_ARCH_NR_GPIO > 0
+#define ARCH_NR_GPIOS CONFIG_ARCH_NR_GPIO
+#else
+#define ARCH_NR_GPIOS		512
+#endif
+#endif
+
+/*
+ * "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)
 {
-	return __gpio_get_value(gpio);
+	return number >= 0 && number < ARCH_NR_GPIOS;
 }
 
-static inline void gpio_set_value(unsigned int gpio, int value)
+struct device;
+
+/* caller holds gpio_lock *OR* gpio is marked as requested */
+static inline struct gpio_chip *gpio_to_chip(unsigned gpio)
 {
-	__gpio_set_value(gpio, value);
+	return gpiod_to_chip(gpio_to_desc(gpio));
 }
 
-static inline int gpio_cansleep(unsigned int gpio)
+/* 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 __gpio_cansleep(gpio);
+	return gpiod_set_debounce(gpio_to_desc(gpio), debounce);
 }
 
-static inline int gpio_to_irq(unsigned int gpio)
+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);
+}
+
+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 int gpio_export_link(struct device *dev, const char *name,
+				   unsigned gpio)
+{
+	return gpiod_export_link(dev, name, gpio_to_desc(gpio));
+}
+
+static inline void gpio_unexport(unsigned gpio)
 {
-	return __gpio_to_irq(gpio);
+	gpiod_unexport(gpio_to_desc(gpio));
 }
 
 /* CONFIG_GPIOLIB: bindings for managed devices that want to request gpios */
-- 
2.29.2

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