Merge tag 'gpio-updates-for-v6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

Pull gpio updates from Bartosz Golaszewski:
 "There's one new driver, lots of various updates to existing ones, some
  refactoring support for new models and misc tweaks and fixes.

  The biggest new feature in GPIO core is adding support for managed,
  enable-counted sharing of GPIO pins, something that - until now - was
  only hacked around with the GPIOD_FLAGS_BIT_NONEXCLUSIVE request flag
  which basically allowed drivers to "fight it out" for the descriptor
  and provided no synchronization. It was enabled on Qualcomm platforms
  (and thus is enabled on arm64 defconfig) and I plan on removing
  GPIOD_FLAGS_BIT_NONEXCLUSIVE once all drivers using it are switched to
  the new mechanism.

  GPIO core:
   - add proper support for shared GPIOs that's aiming to replace the
     current sharing mechanism (which provides no synchronization ot
     enable counting) and enable it for Qualcomm platforms
   - improve the software node GPIO lookup by using the fwnode
     representation instead of the software node's name which was prone
     to bugs (GPIO controllers don't have to use the software node's
     name as their kernel label)
   - remove the last user of legacy-of-mm-gpiochip.h and drop the header
   - move closer to removing the legacy gpio_request_one() routine
   - rename some symbols for consistency
   - shrink GPIO printk() helpers by reusing existing code
   - remove some redundant kernel messages
   - use min() instead of min_t() in GPIO ACPI code
   - use system_percpu_wq instead of system_wq in GPIO character device
     code

  New drivers:
   - add a driver for the QIXIS FPGA GPIO controller

  Driver improvements:
   - use modernized variants of power management macros across a wide
     array of drivers in order to avoid having to use the __maybe_unused
     attribute
   - convert gpio-elkhartlake and reset-gpio to using the auxiliary bus
     instead of the platform bus as they are not really described in
     firmware
   - use lock guards and update symbol prefixes in gpio-mmio
   - support the bryx radio interface kit in gpio-mpsse + refactor the
     driver
   - use software nodes for configuring the reset-gpio driver, including
     setting up the reference to the shared "reset" pin
   - check and propagate the return value of gpiod_set_value() to
     user-space in gpio-virtuser (this was previously not possible as
     this function returned void)
   - extend the gpio-regmap helper with more features (bypass cache for
     aliased inputs, force writes for aliased data registers, add a new
     configuration parameter)
   - remove unneeded includes from gpio-aspeed and gpio-latch
   - add support for Tegra410 to gpio-tegra186
   - replace PCI-specific PM with generic device-level PM in gpio-bt8xx
   - use dynamic GPIO range allocation in gpio-loongson-64bit
   - improve handling of level-triggered interrupts in gpio-pca953x
   - add suspend/resume support to gpio-fxl6408
   - add support for more models to gpio-menz127
   - optimize gpio-mvebu interrupt handling by avoiding unnecessary
     calls to mvebu_gpio_irq_handler()
   - make locking more consistent in gpio-grgpio

  Device-tree bindings:
   - document new NXP and Microchip models

  Documentation:
   - add a comprehensive compatibility and feature list for
     gpio-pca953x, which is a great addition as it's probably the most
     commonly used GPIO expander driver
   - kernel-doc tweaks

  Late fixes:
   - use BYTE_CTRL_MODE for 2K2000/3000 models in gpio-loongson"

* tag 'gpio-updates-for-v6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux: (80 commits)
  gpio: loongson: Switch 2K2000/3000 GPIO to BYTE_CTRL_MODE
  gpio: regmap: fix kernel-doc notation
  gpio: shared: fix a deadlock
  gpio: shared-proxy: set suppress_bind_attrs
  gpio: shared: ignore GPIO hogs when traversing the device tree
  gpio: shared: ignore special __symbols__ node when traversing device tree
  gpio: shared: handle the reset-gpios corner case
  gpio: zynq: Use modern PM macros
  gpio: xilinx: Use modern PM macros
  gpio: xgene: Use modern PM macros
  gpio: uniphier: Use modern PM macros
  gpio: tqmx86: Use modern PM macros
  gpio: pch: Use modern PM macros
  gpio: omap: Use modern PM macros
  gpio: msc313: Use modern PM macros
  gpio: mlxbf2: Use modern PM macros
  gpio: ml-ioh: Use modern PM macros
  gpio: pl061: Use modern PM macros
  gpio: htc-egpio: Use modern PM macros
  gpio: brcmstb: Use modern PM macros
  ...

6 files changed, 42 insertions, 44 deletions

diff --git a/include/linux/ehl_pse_io_aux.h b/include/linux/ehl_pse_io_aux.h
new file mode 100644
index 000000000000..afb8587ee5fb
--- /dev/null
+++ b/include/linux/ehl_pse_io_aux.h
@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Intel Elkhart Lake PSE I/O Auxiliary Device
+ *
+ * Copyright (c) 2025 Intel Corporation.
+ *
+ * Author: Raag Jadav <raag.jadav@intel.com>
+ */
+
+#ifndef _EHL_PSE_IO_AUX_H_
+#define _EHL_PSE_IO_AUX_H_
+
+#include <linux/ioport.h>
+
+#define EHL_PSE_IO_NAME		"ehl_pse_io"
+#define EHL_PSE_GPIO_NAME	"gpio"
+#define EHL_PSE_TIO_NAME	"pps_tio"
+
+struct ehl_pse_io_data {
+	struct resource mem;
+	int irq;
+};
+
+#endif /* _EHL_PSE_IO_AUX_H_ */
diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h
index a8acb7c0b5af..cafeb7a40ad1 100644
--- a/include/linux/gpio/consumer.h
+++ b/include/linux/gpio/consumer.h
@@ -173,6 +173,8 @@ bool gpiod_is_shared(const struct gpio_desc *desc);
 struct gpio_desc *gpio_to_desc(unsigned gpio);
 int desc_to_gpio(const struct gpio_desc *desc);
 
+int gpiod_hwgpio(const struct gpio_desc *desc);
+
 struct gpio_desc *fwnode_gpiod_get_index(struct fwnode_handle *fwnode,
 					 const char *con_id, int index,
 					 enum gpiod_flags flags,
diff --git a/include/linux/gpio/legacy-of-mm-gpiochip.h b/include/linux/gpio/legacy-of-mm-gpiochip.h
deleted file mode 100644
index 2e2bd3b19cc3..000000000000
--- a/include/linux/gpio/legacy-of-mm-gpiochip.h
+++ /dev/null
@@ -1,36 +0,0 @@
-/* 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 <avorontsov@ru.mvista.com>
- */
-
-#ifndef __LINUX_GPIO_LEGACY_OF_MM_GPIO_CHIP_H
-#define __LINUX_GPIO_LEGACY_OF_MM_GPIO_CHIP_H
-
-#include <linux/gpio/driver.h>
-#include <linux/of.h>
-
-/*
- * 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/gpio/regmap.h b/include/linux/gpio/regmap.h
index 87983a5f3681..12d154732ca9 100644
--- a/include/linux/gpio/regmap.h
+++ b/include/linux/gpio/regmap.h
@@ -50,8 +50,8 @@ struct regmap;
  * @regmap_irq_chip:	(Optional) Pointer on an regmap_irq_chip structure. If
  *			set, a regmap-irq device will be created and the IRQ
  *			domain will be set accordingly.
- * @regmap_irq_line	(Optional) The IRQ the device uses to signal interrupts.
- * @regmap_irq_flags	(Optional) The IRQF_ flags to use for the interrupt.
+ * @regmap_irq_line:	(Optional) The IRQ the device uses to signal interrupts.
+ * @regmap_irq_flags:	(Optional) The IRQF_ flags to use for the interrupt.
  *
  * The ->reg_mask_xlate translates a given base address and GPIO offset to
  * register and mask pair. The base address is one of the given register
diff --git a/include/linux/property.h b/include/linux/property.h
index 50b26589dd70..272bfbdea7bf 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -355,19 +355,26 @@ struct software_node;
 
 /**
  * struct software_node_ref_args - Reference property with additional arguments
- * @node: Reference to a software node
+ * @swnode: Reference to a software node
+ * @fwnode: Alternative reference to a firmware node handle
  * @nargs: Number of elements in @args array
  * @args: Integer arguments
  */
 struct software_node_ref_args {
-	const struct software_node *node;
+	const struct software_node *swnode;
+	struct fwnode_handle *fwnode;
 	unsigned int nargs;
 	u64 args[NR_FWNODE_REFERENCE_ARGS];
 };
 
 #define SOFTWARE_NODE_REFERENCE(_ref_, ...)			\
 (const struct software_node_ref_args) {				\
-	.node = _ref_,						\
+	.swnode = _Generic(_ref_,				\
+			   const struct software_node *: _ref_,	\
+			   default: NULL),			\
+	.fwnode = _Generic(_ref_,				\
+			   struct fwnode_handle *: _ref_,	\
+			   default: NULL),			\
 	.nargs = COUNT_ARGS(__VA_ARGS__),			\
 	.args = { __VA_ARGS__ },				\
 }
diff --git a/include/linux/string.h b/include/linux/string.h
index 929d05d1247c..0266dbdaa4cd 100644
--- a/include/linux/string.h
+++ b/include/linux/string.h
@@ -564,13 +564,14 @@ static inline bool strstarts(const char *str, const char *prefix)
 
 /**
  * strends - Check if a string ends with another string.
- * @str - NULL-terminated string to check against @suffix
- * @suffix - NULL-terminated string defining the suffix to look for in @str
+ * @str: NULL-terminated string to check against @suffix
+ * @suffix: NULL-terminated string defining the suffix to look for in @str
  *
  * Returns:
  * True if @str ends with @suffix. False in all other cases.
  */
-static inline bool strends(const char *str, const char *suffix)
+static inline bool __attribute__((nonnull(1, 2)))
+strends(const char *str, const char *suffix)
 {
 	unsigned int str_len = strlen(str), suffix_len = strlen(suffix);