Merge tag 'gpio-updates-for-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

Pull gpio updates from Bartosz Golaszewski: "We have some new drivers, significant refactoring of existing intel platforms, lots of improvements all around, mass conversion to using immutable irqchips by drivers that had not been converted individually yet and some changes in the core library code. Summary: New drivers: - add a driver for the Loongson GPIO controller - add a driver for the fxl6408 I2C GPIO expander - add a GPIO module containing code common for Intel Elkhart Lake and Merrifield platforms - add a driver for the Intel Elkhart Lake platform reusing the code from the intel tangier library GPIOLIB core: - GPIO ACPI improvements - simplify gpiochip_add_data_with_keys() fwnode handling - cleanup header inclusions (remove unneeded ones, order the rest alphabetically) - remove duplicate code (reuse krealloc() instead of open-coding it, drop a duplicated check in gpiod_find_and_request()) - reshuffle the code to remove unnecessary forward declarations - coding style cleanups and improvements - add a helper for accessing device fwnodes - small updates in docs Driver improvements: - convert all remaining GPIO irqchip drivers to using immutable irqchips - drop unnecessary of_match_ptr() macro expansions - shrink the code in gpio-merrifield significantly by reusing the code from gpio-tangier + minor tweaks to the driver code - remove MODULE_LICENSE() from drivers that can only be built-in - add device-tree support to gpio-loongson1 - use new regmap features in gpio-104-dio-48e and gpio-pcie-idio-24 - minor tweaks and fixes to gpio-xra1403, gpio-sim, gpio-tegra194, gpio-omap, gpio-aspeed, gpio-raspberrypi-exp - shrink code in gpio-ich and gpio-pxa - Kconfig tweak for gpio-pmic-eic-sprd" * tag 'gpio-updates-for-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux: (99 commits) gpio: gpiolib: Simplify gpiochip_add_data_with_key() fwnode gpiolib: Add gpiochip_set_data() helper gpiolib: Move gpiochip_get_data() higher in the code gpiolib: Check array_info for NULL only once in gpiod_get_array() gpiolib: Replace open coded krealloc() gpiolib: acpi: Add a ignore wakeup quirk for Clevo NL5xNU gpiolib: acpi: Move ACPI device NULL check to acpi_get_driver_gpio_data() gpiolib: acpi: use the fwnode in acpi_gpiochip_find() gpio: mm-lantiq: Fix typo in the newly added header filename sh: mach-x3proto: Add missing #include <linux/gpio/driver.h> powerpc/40x: Add missing select OF_GPIO_MM_GPIOCHIP gpio: xlp: Convert to immutable irq_chip gpio: xilinx: Convert to immutable irq_chip gpio: xgs-iproc: Convert to immutable irq_chip gpio: visconti: Convert to immutable irq_chip gpio: tqmx86: Convert to immutable irq_chip gpio: thunderx: Convert to immutable irq_chip gpio: stmpe: Convert to immutable irq_chip gpio: siox: Convert to immutable irq_chip gpio: rda: Convert to immutable irq_chip ...
author: Linus Torvalds <torvalds@linux-foundation.org> 2023-04-25 17:18:18 -0700
committer: Linus Torvalds <torvalds@linux-foundation.org> 2023-04-25 17:18:18 -0700
commit: 2c96606a0f8b7900387dbeb6532b59527999834d (patch)
tree: 84772d9aa6951ca93d27b3ddc9bcb7c79bd7b554 /drivers/gpio/gpiolib.c
parent: d84955790e16588774c4365ba0d449e8a2aa46d8 (diff)
parent: 8a4adcf67a39b3f308bb8cf686e41c0e26aa12e8 (diff)
1 files changed, 93 insertions, 80 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 19bd23044b01..04fb05df805b 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -6,22 +6,25 @@
 #include <linux/debugfs.h>
 #include <linux/device.h>
 #include <linux/err.h>
+#include <linux/errno.h>
 #include <linux/file.h>
 #include <linux/fs.h>
-#include <linux/gpio.h>
-#include <linux/gpio/driver.h>
-#include <linux/gpio/machine.h>
 #include <linux/idr.h>
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/kernel.h>
 #include <linux/list.h>
 #include <linux/module.h>
+#include <linux/of.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/seq_file.h>
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 
+#include <linux/gpio.h>
+#include <linux/gpio/driver.h>
+#include <linux/gpio/machine.h>
+
 #include <uapi/linux/gpio.h>
 
 #include "gpiolib-acpi.h"
@@ -58,7 +61,20 @@
 static DEFINE_IDA(gpio_ida);
 static dev_t gpio_devt;
 #define GPIO_DEV_MAX 256 /* 256 GPIO chip devices supported */
-static int gpio_bus_match(struct device *dev, struct device_driver *drv);
+
+static int gpio_bus_match(struct device *dev, struct device_driver *drv)
+{
+	struct fwnode_handle *fwnode = dev_fwnode(dev);
+
+	/*
+	 * Only match if the fwnode doesn't already have a proper struct device
+	 * created for it.
+	 */
+	if (fwnode && fwnode->dev != dev)
+		return 0;
+	return 1;
+}
+
 static struct bus_type gpio_bus_type = {
 	.name = "gpio",
 	.match = gpio_bus_match,
@@ -357,7 +373,7 @@ static int gpiochip_set_desc_names(struct gpio_chip *gc)
 }
 
 /*
- * devprop_gpiochip_set_names - Set GPIO line names using device properties
+ * gpiochip_set_names - Set GPIO line names using device properties
  * @chip: GPIO chip whose lines should be named, if possible
  *
  * Looks for device property "gpio-line-names" and if it exists assigns
@@ -365,7 +381,7 @@ static int gpiochip_set_desc_names(struct gpio_chip *gc)
  * names belong to the underlying firmware node and should not be released
  * by the caller.
  */
-static int devprop_gpiochip_set_names(struct gpio_chip *chip)
+static int gpiochip_set_names(struct gpio_chip *chip)
 {
 	struct gpio_device *gdev = chip->gpiodev;
 	struct device *dev = &gdev->dev;
@@ -556,7 +572,7 @@ bool gpiochip_line_is_valid(const struct gpio_chip *gc,
 }
 EXPORT_SYMBOL_GPL(gpiochip_line_is_valid);
 
-static void gpiodevice_release(struct device *dev)
+static void gpiodev_release(struct device *dev)
 {
 	struct gpio_device *gdev = to_gpio_device(dev);
 	unsigned long flags;
@@ -585,21 +601,22 @@ static void gpiodevice_release(struct device *dev)
 
 static int gpiochip_setup_dev(struct gpio_device *gdev)
 {
+	struct fwnode_handle *fwnode = dev_fwnode(&gdev->dev);
 	int ret;
 
 	/*
 	 * If fwnode doesn't belong to another device, it's safe to clear its
 	 * initialized flag.
 	 */
-	if (gdev->dev.fwnode && !gdev->dev.fwnode->dev)
-		fwnode_dev_initialized(gdev->dev.fwnode, false);
+	if (fwnode && !fwnode->dev)
+		fwnode_dev_initialized(fwnode, false);
 
 	ret = gcdev_register(gdev, gpio_devt);
 	if (ret)
 		return ret;
 
 	/* From this point, the .release() function cleans up gpio_device */
-	gdev->dev.release = gpiodevice_release;
+	gdev->dev.release = gpiodev_release;
 
 	ret = gpiochip_sysfs_register(gdev);
 	if (ret)
@@ -663,11 +680,28 @@ static void gpiochip_setup_devs(void)
 	}
 }
 
+static void gpiochip_set_data(struct gpio_chip *gc, void *data)
+{
+	gc->gpiodev->data = data;
+}
+
+/**
+ * gpiochip_get_data() - get per-subdriver data for the chip
+ * @gc: GPIO chip
+ *
+ * Returns:
+ * The per-subdriver data for the chip.
+ */
+void *gpiochip_get_data(struct gpio_chip *gc)
+{
+	return gc->gpiodev->data;
+}
+EXPORT_SYMBOL_GPL(gpiochip_get_data);
+
 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;
 	unsigned int i;
@@ -675,12 +709,12 @@ int gpiochip_add_data_with_key(struct gpio_chip *gc, void *data,
 	int base = 0;
 	int ret = 0;
 
-	/* If the calling driver did not initialize firmware node, do it here */
-	if (gc->fwnode)
-		fwnode = gc->fwnode;
-	else if (gc->parent)
-		fwnode = dev_fwnode(gc->parent);
-	gc->fwnode = fwnode;
+	/*
+	 * If the calling driver did not initialize firmware node, do it here
+	 * using the parent device, if any.
+	 */
+	if (!gc->fwnode && gc->parent)
+		gc->fwnode = dev_fwnode(gc->parent);
 
 	/*
 	 * First: allocate and populate the internal stat container, and
@@ -692,7 +726,9 @@ int gpiochip_add_data_with_key(struct gpio_chip *gc, void *data,
 	gdev->dev.bus = &gpio_bus_type;
 	gdev->dev.parent = gc->parent;
 	gdev->chip = gc;
+
 	gc->gpiodev = gdev;
+	gpiochip_set_data(gc, data);
 
 	device_set_node(&gdev->dev, gc->fwnode);
 
@@ -759,7 +795,6 @@ int gpiochip_add_data_with_key(struct gpio_chip *gc, void *data,
 	}
 
 	gdev->ngpio = gc->ngpio;
-	gdev->data = data;
 
 	spin_lock_irqsave(&gpio_lock, flags);
 
@@ -816,7 +851,7 @@ int gpiochip_add_data_with_key(struct gpio_chip *gc, void *data,
 		if (ret)
 			goto err_remove_from_list;
 	}
-	ret = devprop_gpiochip_set_names(gc);
+	ret = gpiochip_set_names(gc);
 	if (ret)
 		goto err_remove_from_list;
 
@@ -922,19 +957,6 @@ err_print_message:
 EXPORT_SYMBOL_GPL(gpiochip_add_data_with_key);
 
 /**
- * gpiochip_get_data() - get per-subdriver data for the chip
- * @gc: GPIO chip
- *
- * Returns:
- * The per-subdriver data for the chip.
- */
-void *gpiochip_get_data(struct gpio_chip *gc)
-{
-	return gc->gpiodev->data;
-}
-EXPORT_SYMBOL_GPL(gpiochip_get_data);
-
-/**
  * gpiochip_remove() - unregister a gpio_chip
  * @gc: the chip to unregister
  *
@@ -960,9 +982,9 @@ void gpiochip_remove(struct gpio_chip *gc)
 	gpiochip_free_valid_mask(gc);
 	/*
 	 * We accept no more calls into the driver from this point, so
-	 * NULL the driver data pointer
+	 * NULL the driver data pointer.
 	 */
-	gdev->data = NULL;
+	gpiochip_set_data(gc, NULL);
 
 	spin_lock_irqsave(&gpio_lock, flags);
 	for (i = 0; i < gdev->ngpio; i++) {
@@ -1201,7 +1223,7 @@ static int gpiochip_hierarchy_irq_domain_alloc(struct irq_domain *d,
 	if (ret)
 		return ret;
 
-	chip_dbg(gc, "allocate IRQ %d, hwirq %lu\n", irq,  hwirq);
+	chip_dbg(gc, "allocate IRQ %d, hwirq %lu\n", irq, hwirq);
 
 	ret = girq->child_to_parent_hwirq(gc, hwirq, type,
 					  &parent_hwirq, &parent_type);
@@ -1369,8 +1391,7 @@ static bool gpiochip_hierarchy_is_hierarchical(struct gpio_chip *gc)
  * gpiochip by assigning the gpiochip as chip data, and using the irqchip
  * stored inside the gpiochip.
  */
-int gpiochip_irq_map(struct irq_domain *d, unsigned int irq,
-		     irq_hw_number_t hwirq)
+int gpiochip_irq_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hwirq)
 {
 	struct gpio_chip *gc = d->host_data;
 	int ret = 0;
@@ -1446,8 +1467,9 @@ int gpiochip_irq_domain_activate(struct irq_domain *domain,
 				 struct irq_data *data, bool reserve)
 {
 	struct gpio_chip *gc = domain->host_data;
+	unsigned int hwirq = irqd_to_hwirq(data);
 
-	return gpiochip_lock_as_irq(gc, data->hwirq);
+	return gpiochip_lock_as_irq(gc, hwirq);
 }
 EXPORT_SYMBOL_GPL(gpiochip_irq_domain_activate);
 
@@ -1464,8 +1486,9 @@ void gpiochip_irq_domain_deactivate(struct irq_domain *domain,
 				    struct irq_data *data)
 {
 	struct gpio_chip *gc = domain->host_data;
+	unsigned int hwirq = irqd_to_hwirq(data);
 
-	return gpiochip_unlock_as_irq(gc, data->hwirq);
+	return gpiochip_unlock_as_irq(gc, hwirq);
 }
 EXPORT_SYMBOL_GPL(gpiochip_irq_domain_deactivate);
 
@@ -1505,33 +1528,37 @@ static int gpiochip_to_irq(struct gpio_chip *gc, unsigned int offset)
 int gpiochip_irq_reqres(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	unsigned int hwirq = irqd_to_hwirq(d);
 
-	return gpiochip_reqres_irq(gc, d->hwirq);
+	return gpiochip_reqres_irq(gc, hwirq);
 }
 EXPORT_SYMBOL(gpiochip_irq_reqres);
 
 void gpiochip_irq_relres(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	unsigned int hwirq = irqd_to_hwirq(d);
 
-	gpiochip_relres_irq(gc, d->hwirq);
+	gpiochip_relres_irq(gc, hwirq);
 }
 EXPORT_SYMBOL(gpiochip_irq_relres);
 
 static void gpiochip_irq_mask(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	unsigned int hwirq = irqd_to_hwirq(d);
 
 	if (gc->irq.irq_mask)
 		gc->irq.irq_mask(d);
-	gpiochip_disable_irq(gc, d->hwirq);
+	gpiochip_disable_irq(gc, hwirq);
 }
 
 static void gpiochip_irq_unmask(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	unsigned int hwirq = irqd_to_hwirq(d);
 
-	gpiochip_enable_irq(gc, d->hwirq);
+	gpiochip_enable_irq(gc, hwirq);
 	if (gc->irq.irq_unmask)
 		gc->irq.irq_unmask(d);
 }
@@ -1539,17 +1566,19 @@ static void gpiochip_irq_unmask(struct irq_data *d)
 static void gpiochip_irq_enable(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	unsigned int hwirq = irqd_to_hwirq(d);
 
-	gpiochip_enable_irq(gc, d->hwirq);
+	gpiochip_enable_irq(gc, hwirq);
 	gc->irq.irq_enable(d);
 }
 
 static void gpiochip_irq_disable(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	unsigned int hwirq = irqd_to_hwirq(d);
 
 	gc->irq.irq_disable(d);
-	gpiochip_disable_irq(gc, d->hwirq);
+	gpiochip_disable_irq(gc, hwirq);
 }
 
 static void gpiochip_set_irq_hooks(struct gpio_chip *gc)
@@ -3909,13 +3938,10 @@ static struct gpio_desc *gpiod_find_and_request(struct device *consumer,
 						bool platform_lookup_allowed)
 {
 	unsigned long lookupflags = GPIO_LOOKUP_FLAGS_DEFAULT;
-	struct gpio_desc *desc = ERR_PTR(-ENOENT);
+	struct gpio_desc *desc;
 	int ret;
 
-	if (!IS_ERR_OR_NULL(fwnode))
-		desc = gpiod_find_by_fwnode(fwnode, consumer, con_id, idx,
-					    &flags, &lookupflags);
-
+	desc = gpiod_find_by_fwnode(fwnode, consumer, con_id, idx, &flags, &lookupflags);
 	if (gpiod_not_found(desc) && platform_lookup_allowed) {
 		/*
 		 * Either we are not using DT or ACPI, or their lookup did not
@@ -4256,16 +4282,18 @@ struct gpio_descs *__must_check gpiod_get_array(struct device *dev,
 	struct gpio_array *array_info = NULL;
 	struct gpio_chip *gc;
 	int count, bitmap_size;
+	size_t descs_size;
 
 	count = gpiod_count(dev, con_id);
 	if (count < 0)
 		return ERR_PTR(count);
 
-	descs = kzalloc(struct_size(descs, desc, count), GFP_KERNEL);
+	descs_size = struct_size(descs, desc, count);
+	descs = kzalloc(descs_size, GFP_KERNEL);
 	if (!descs)
 		return ERR_PTR(-ENOMEM);
 
-	for (descs->ndescs = 0; descs->ndescs < count; ) {
+	for (descs->ndescs = 0; descs->ndescs < count; descs->ndescs++) {
 		desc = gpiod_get_index(dev, con_id, descs->ndescs, flags);
 		if (IS_ERR(desc)) {
 			gpiod_put_array(descs);
@@ -4285,20 +4313,17 @@ struct gpio_descs *__must_check gpiod_get_array(struct device *dev,
 			bitmap_size = BITS_TO_LONGS(gc->ngpio > count ?
 						    gc->ngpio : count);
 
-			array = kzalloc(struct_size(descs, desc, count) +
-					struct_size(array_info, invert_mask,
-					3 * bitmap_size), GFP_KERNEL);
+			array = krealloc(descs, descs_size +
+					 struct_size(array_info, invert_mask, 3 * bitmap_size),
+					 GFP_KERNEL | __GFP_ZERO);
 			if (!array) {
 				gpiod_put_array(descs);
 				return ERR_PTR(-ENOMEM);
 			}
 
-			memcpy(array, descs,
-			       struct_size(descs, desc, descs->ndescs + 1));
-			kfree(descs);
-
 			descs = array;
-			array_info = (void *)(descs->desc + count);
+
+			array_info = (void *)descs + descs_size;
 			array_info->get_mask = array_info->invert_mask +
 						  bitmap_size;
 			array_info->set_mask = array_info->get_mask +
@@ -4313,8 +4338,13 @@ struct gpio_descs *__must_check gpiod_get_array(struct device *dev,
 				   count - descs->ndescs);
 			descs->info = array_info;
 		}
+
+		/* If there is no cache for fast bitmap processing path, continue */
+		if (!array_info)
+			continue;
+
 		/* Unmark array members which don't belong to the 'fast' chip */
-		if (array_info && array_info->chip != gc) {
+		if (array_info->chip != gc) {
 			__clear_bit(descs->ndescs, array_info->get_mask);
 			__clear_bit(descs->ndescs, array_info->set_mask);
 		}
@@ -4322,8 +4352,7 @@ struct gpio_descs *__must_check gpiod_get_array(struct device *dev,
 		 * Detect array members which belong to the 'fast' chip
 		 * but their pins are not in hardware order.
 		 */
-		else if (array_info &&
-			   gpio_chip_hwgpio(desc) != descs->ndescs) {
+		else if (gpio_chip_hwgpio(desc) != descs->ndescs) {
 			/*
 			 * Don't use fast path if all array members processed so
 			 * far belong to the same chip as this one but its pin
@@ -4337,7 +4366,7 @@ struct gpio_descs *__must_check gpiod_get_array(struct device *dev,
 				__clear_bit(descs->ndescs,
 					    array_info->set_mask);
 			}
-		} else if (array_info) {
+		} else {
 			/* Exclude open drain or open source from fast output */
 			if (gpiochip_line_is_open_drain(gc, descs->ndescs) ||
 			    gpiochip_line_is_open_source(gc, descs->ndescs))
@@ -4348,8 +4377,6 @@ struct gpio_descs *__must_check gpiod_get_array(struct device *dev,
 				__set_bit(descs->ndescs,
 					  array_info->invert_mask);
 		}
-
-		descs->ndescs++;
 	}
 	if (array_info)
 		dev_dbg(dev,
@@ -4413,20 +4440,6 @@ void gpiod_put_array(struct gpio_descs *descs)
 }
 EXPORT_SYMBOL_GPL(gpiod_put_array);
 
-
-static int gpio_bus_match(struct device *dev, struct device_driver *drv)
-{
-	struct fwnode_handle *fwnode = dev_fwnode(dev);
-
-	/*
-	 * Only match if the fwnode doesn't already have a proper struct device
-	 * created for it.
-	 */
-	if (fwnode && fwnode->dev != dev)
-		return 0;
-	return 1;
-}
-
 static int gpio_stub_drv_probe(struct device *dev)
 {
 	/*
author	Linus Torvalds <torvalds@linux-foundation.org>	2023-04-25 17:18:18 -0700
committer	Linus Torvalds <torvalds@linux-foundation.org>	2023-04-25 17:18:18 -0700
commit	2c96606a0f8b7900387dbeb6532b59527999834d (patch)
tree	84772d9aa6951ca93d27b3ddc9bcb7c79bd7b554 /drivers/gpio/gpiolib.c
parent	d84955790e16588774c4365ba0d449e8a2aa46d8 (diff)
parent	8a4adcf67a39b3f308bb8cf686e41c0e26aa12e8 (diff)