[PATCH v1 1/2] gpiolib: of: Drop redundant check in of_mm_gpiochip_remove()

[PATCH v1 1/2] gpiolib: of: Drop redundant check in of_mm_gpiochip_remove()

[Andy Shevchenko]

The callers never call the function with invalid pointer.
Moreover, compiler quite likely dropped that check anyway
because we use that pointer before the check.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/gpio/gpiolib-of.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index feeb9e8e846d..83997434215e 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -963,9 +963,6 @@ void of_mm_gpiochip_remove(struct of_mm_gpio_chip *mm_gc)
 {
 	struct gpio_chip *gc = &mm_gc->gc;
 
-	if (!mm_gc)
-		return;
-
 	gpiochip_remove(gc);
 	iounmap(mm_gc->regs);
 	kfree(gc->label);
-- 
2.35.1

[PATCH v1 2/2] gpiolib: Get rid of not used of_node member

[Andy Shevchenko]

All new drivers should use fwnode and / or parent to provide the
necessary information to the GPIO library.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/gpio/gpiolib-acpi.c | 10 ----------
 drivers/gpio/gpiolib-acpi.h |  4 ----
 drivers/gpio/gpiolib-of.c   | 22 +++-------------------
 drivers/gpio/gpiolib-of.h   |  5 -----
 drivers/gpio/gpiolib.c      | 15 +--------------
 include/linux/gpio/driver.h |  7 -------
 6 files changed, 4 insertions(+), 59 deletions(-)

diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index a7d2358736fe..5c6ebb249863 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -1363,16 +1363,6 @@ void acpi_gpiochip_remove(struct gpio_chip *chip)
 	kfree(acpi_gpio);
 }
 
-void acpi_gpio_dev_init(struct gpio_chip *gc, struct gpio_device *gdev)
-{
-	/* Set default fwnode to parent's one if present */
-	if (gc->parent)
-		ACPI_COMPANION_SET(&gdev->dev, ACPI_COMPANION(gc->parent));
-
-	if (gc->fwnode)
-		device_set_node(&gdev->dev, gc->fwnode);
-}
-
 static int acpi_gpio_package_count(const union acpi_object *obj)
 {
 	const union acpi_object *element = obj->package.elements;
diff --git a/drivers/gpio/gpiolib-acpi.h b/drivers/gpio/gpiolib-acpi.h
index 1ac6816839db..a15495ef19ea 100644
--- a/drivers/gpio/gpiolib-acpi.h
+++ b/drivers/gpio/gpiolib-acpi.h
@@ -38,8 +38,6 @@ struct acpi_gpio_info {
 void acpi_gpiochip_add(struct gpio_chip *chip);
 void acpi_gpiochip_remove(struct gpio_chip *chip);
 
-void acpi_gpio_dev_init(struct gpio_chip *gc, struct gpio_device *gdev);
-
 void acpi_gpiochip_request_interrupts(struct gpio_chip *chip);
 void acpi_gpiochip_free_interrupts(struct gpio_chip *chip);
 
@@ -62,8 +60,6 @@ int acpi_gpio_count(struct device *dev, const char *con_id);
 static inline void acpi_gpiochip_add(struct gpio_chip *chip) { }
 static inline void acpi_gpiochip_remove(struct gpio_chip *chip) { }
 
-static inline void acpi_gpio_dev_init(struct gpio_chip *gc, struct gpio_device *gdev) { }
-
 static inline void
 acpi_gpiochip_request_interrupts(struct gpio_chip *chip) { }
 
diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index 83997434215e..e22d25d85c7e 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -669,7 +669,7 @@ static struct gpio_desc *of_parse_own_gpio(struct device_node *np,
 	u32 tmp;
 	int ret;
 
-	chip_np = chip->of_node;
+	chip_np = to_of_node(chip->fwnode);
 	if (!chip_np)
 		return ERR_PTR(-EINVAL);
 
@@ -761,7 +761,7 @@ static int of_gpiochip_scan_gpios(struct gpio_chip *chip)
 	struct device_node *np;
 	int ret;
 
-	for_each_available_child_of_node(chip->of_node, np) {
+	for_each_available_child_of_node(to_of_node(chip->fwnode), np) {
 		if (!of_property_read_bool(np, "gpio-hog"))
 			continue;
 
@@ -972,7 +972,7 @@ EXPORT_SYMBOL_GPL(of_mm_gpiochip_remove);
 #ifdef CONFIG_PINCTRL
 static int of_gpiochip_add_pin_range(struct gpio_chip *chip)
 {
-	struct device_node *np = chip->of_node;
+	struct device_node *np = to_of_node(chip->fwnode);
 	struct of_phandle_args pinspec;
 	struct pinctrl_dev *pctldev;
 	int index = 0, ret;
@@ -1094,19 +1094,3 @@ void of_gpiochip_remove(struct gpio_chip *chip)
 {
 	fwnode_handle_put(chip->fwnode);
 }
-
-void of_gpio_dev_init(struct gpio_chip *gc, struct gpio_device *gdev)
-{
-	/* Set default OF node to parent's one if present */
-	if (gc->parent)
-		gdev->dev.of_node = gc->parent->of_node;
-
-	if (gc->fwnode)
-		gc->of_node = to_of_node(gc->fwnode);
-
-	/* If the gpiochip has an assigned OF node this takes precedence */
-	if (gc->of_node)
-		gdev->dev.of_node = gc->of_node;
-	else
-		gc->of_node = gdev->dev.of_node;
-}
diff --git a/drivers/gpio/gpiolib-of.h b/drivers/gpio/gpiolib-of.h
index 2c32a332ede5..f128a7f45945 100644
--- a/drivers/gpio/gpiolib-of.h
+++ b/drivers/gpio/gpiolib-of.h
@@ -14,7 +14,6 @@ struct gpio_desc *of_find_gpio(struct device *dev,
 int of_gpiochip_add(struct gpio_chip *gc);
 void of_gpiochip_remove(struct gpio_chip *gc);
 int of_gpio_get_count(struct device *dev, const char *con_id);
-void of_gpio_dev_init(struct gpio_chip *gc, struct gpio_device *gdev);
 #else
 static inline struct gpio_desc *of_find_gpio(struct device *dev,
 					     const char *con_id,
@@ -29,10 +28,6 @@ static inline int of_gpio_get_count(struct device *dev, const char *con_id)
 {
 	return 0;
 }
-static inline void of_gpio_dev_init(struct gpio_chip *gc,
-				    struct gpio_device *gdev)
-{
-}
 #endif /* CONFIG_OF_GPIO */
 
 extern struct notifier_block gpio_of_notifier;
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 11fb7ec883e9..4032fbb6994c 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -646,7 +646,6 @@ int gpiochip_add_data_with_key(struct gpio_chip *gc, void *data,
 			       struct lock_class_key *lock_key,
 			       struct lock_class_key *request_key)
 {
-	struct fwnode_handle *fwnode = NULL;
 	struct gpio_device *gdev;
 	unsigned long flags;
 	int base = gc->base;
@@ -654,11 +653,6 @@ int gpiochip_add_data_with_key(struct gpio_chip *gc, void *data,
 	int ret = 0;
 	u32 ngpios;
 
-	if (gc->fwnode)
-		fwnode = gc->fwnode;
-	else if (gc->parent)
-		fwnode = dev_fwnode(gc->parent);
-
 	/*
 	 * First: allocate and populate the internal stat container, and
 	 * set up the struct device.
@@ -671,14 +665,7 @@ int gpiochip_add_data_with_key(struct gpio_chip *gc, void *data,
 	gdev->chip = gc;
 	gc->gpiodev = gdev;
 
-	of_gpio_dev_init(gc, gdev);
-	acpi_gpio_dev_init(gc, gdev);
-
-	/*
-	 * Assign fwnode depending on the result of the previous calls,
-	 * if none of them succeed, assign it to the parent's one.
-	 */
-	gdev->dev.fwnode = dev_fwnode(&gdev->dev) ?: fwnode;
+	device_set_node(&gdev->dev, gc->fwnode ?: dev_fwnode(gc->parent));
 
 	gdev->id = ida_alloc(&gpio_ida, GFP_KERNEL);
 	if (gdev->id < 0) {
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index 6aeea1071b1b..12c2c32d42d2 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -503,13 +503,6 @@ struct gpio_chip {
 	 * the device tree automatically may have an OF translation
 	 */
 
-	/**
-	 * @of_node:
-	 *
-	 * Pointer to a device tree node representing this GPIO controller.
-	 */
-	struct device_node *of_node;
-
 	/**
 	 * @of_gpio_n_cells:
 	 *
-- 
2.35.1

Re: [PATCH v1 1/2] gpiolib: of: Drop redundant check in of_mm_gpiochip_remove()

[Andy Shevchenko]

On Wed, Nov 09, 2022 at 05:07:05PM +0200, Andy Shevchenko wrote:
> The callers never call the function with invalid pointer.
> Moreover, compiler quite likely dropped that check anyway
> because we use that pointer before the check.

Please, ignore this series, it was wrong offset to send the patches from.

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v1 2/2] gpiolib: Get rid of not used of_node member

[Andy Shevchenko]

On Wed, Nov 09, 2022 at 05:07:06PM +0200, Andy Shevchenko wrote:
> All new drivers should use fwnode and / or parent to provide the
> necessary information to the GPIO library.

Please, ignore this series, it was wrong offset to send the patches from.

-- 
With Best Regards,
Andy Shevchenko