Merge tag 'gpio-v4.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO updates from Linus Walleij:
 "This is the bulk of GPIO changes for the v4.1 development cycle:

   - A new GPIO hogging mechanism has been added.  This can be used on
     boards that want to drive some GPIO line high, low, or set it as
     input on boot and then never touch it again.  For some embedded
     systems this is bliss and simplifies things to a great extent.

   - Some API cleanup and closure: gpiod_get_array() and
     gpiod_put_array() has been added to get and put GPIOs in bulk as
     was possible with the non-descriptor API.

   - Encapsulate cross-calls to the pin control subsystem in
     <linux/gpio/driver.h>.  Now this should be the only header any GPIO
     driver needs to include or something is wrong.  Cleanups
     restricting drivers to this include are welcomed if tested.

   - Sort the GPIO Kconfig and split it into submenus, as it was
     becoming and unstructured, illogical and unnavigatable mess.  I
     hope this is easier to follow.  Menus that require a certain
     subsystem like I2C can now be hidden nicely for example, still
     working on others.

   - New drivers:

       - New driver for the Altera Soft GPIO.

       - The F7188x driver now handles the F71869 and F71869A variants.

       - The MIPS Loongson driver has been moved to drivers/gpio for
         consolidation and cleanup.

   - Cleanups:

       - The MAX732x is converted to use the GPIOLIB_IRQCHIP
         infrastructure.

       - The PCF857x is converted to use the GPIOLIB_IRQCHIP
         infrastructure.

       - Radical cleanup of the OMAP driver.

   - Misc:

       - Enable the DWAPB GPIO for all architectures.  This is a "hard
         IP" block from Synopsys which has started to turn up in so
         diverse architectures as X86 Quark, ARC and a slew of ARM
         systems.  So even though it's not an expander, it's generic
         enough to be available for all.

       - We add a mock GPIO on Crystalcove PMIC after a long discussion
         with Daniel Vetter et al, tracing back to the shootout at the
         kernel summit where DRM drivers and sub-componentization was
         discussed.  In this case a mock GPIO is assumed to be the best
         compromise gaining some reuse of infrastructure without making
         DRM drivers overly complex at the same time.  Let's see"

* tag 'gpio-v4.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (62 commits)
  Revert "gpio: sch: use uapi/linux/pci_ids.h directly"
  gpio: dwapb: remove dependencies
  gpio: dwapb: enable for ARC
  gpio: removing kfree remove functionality
  gpio: mvebu: Fix mask/unmask managment per irq chip type
  gpio: split GPIO drivers in submenus
  gpio: move MFD GPIO drivers under their own comment
  gpio: move BCM Kona Kconfig option
  gpio: arrange SPI Kconfig symbols alphabetically
  gpio: arrange PCI GPIO controllers alphabetically
  gpio: arrange I2C Kconfig symbols alphabetically
  gpio: arrange Kconfig symbols alphabetically
  gpio: ich: Implement get_direction function
  gpio: use (!foo) instead of (foo == NULL)
  gpio: arizona: drop owner assignment from platform_drivers
  gpio: max7300: remove 'ret' variable
  gpio: use devm_kzalloc
  gpio: sch: use uapi/linux/pci_ids.h directly
  gpio: x-gene: fix devm_ioremap_resource() check
  gpio: loongson: Add Loongson-3A/3B GPIO driver support
  ...

2 files changed, 125 insertions, 0 deletions

diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h
index 45afc2dee560..3a7c9ffd5ab9 100644
--- a/include/linux/gpio/consumer.h
+++ b/include/linux/gpio/consumer.h
@@ -16,6 +16,15 @@ struct device;
  */
 struct gpio_desc;
 
+/**
+ * Struct containing an array of descriptors that can be obtained using
+ * gpiod_get_array().
+ */
+struct gpio_descs {
+	unsigned int ndescs;
+	struct gpio_desc *desc[];
+};
+
 #define GPIOD_FLAGS_BIT_DIR_SET		BIT(0)
 #define GPIOD_FLAGS_BIT_DIR_OUT		BIT(1)
 #define GPIOD_FLAGS_BIT_DIR_VAL		BIT(2)
@@ -34,6 +43,9 @@ enum gpiod_flags {
 
 #ifdef CONFIG_GPIOLIB
 
+/* Return the number of GPIOs associated with a device / function */
+int gpiod_count(struct device *dev, const char *con_id);
+
 /* Acquire and dispose GPIOs */
 struct gpio_desc *__must_check __gpiod_get(struct device *dev,
 					 const char *con_id,
@@ -49,7 +61,14 @@ struct gpio_desc *__must_check __gpiod_get_index_optional(struct device *dev,
 							const char *con_id,
 							unsigned int index,
 							enum gpiod_flags flags);
+struct gpio_descs *__must_check gpiod_get_array(struct device *dev,
+						const char *con_id,
+						enum gpiod_flags flags);
+struct gpio_descs *__must_check gpiod_get_array_optional(struct device *dev,
+							const char *con_id,
+							enum gpiod_flags flags);
 void gpiod_put(struct gpio_desc *desc);
+void gpiod_put_array(struct gpio_descs *descs);
 
 struct gpio_desc *__must_check __devm_gpiod_get(struct device *dev,
 					      const char *con_id,
@@ -64,7 +83,14 @@ struct gpio_desc *__must_check __devm_gpiod_get_optional(struct device *dev,
 struct gpio_desc *__must_check
 __devm_gpiod_get_index_optional(struct device *dev, const char *con_id,
 			      unsigned int index, enum gpiod_flags flags);
+struct gpio_descs *__must_check devm_gpiod_get_array(struct device *dev,
+						     const char *con_id,
+						     enum gpiod_flags flags);
+struct gpio_descs *__must_check
+devm_gpiod_get_array_optional(struct device *dev, const char *con_id,
+			      enum gpiod_flags flags);
 void devm_gpiod_put(struct device *dev, struct gpio_desc *desc);
+void devm_gpiod_put_array(struct device *dev, struct gpio_descs *descs);
 
 int gpiod_get_direction(struct gpio_desc *desc);
 int gpiod_direction_input(struct gpio_desc *desc);
@@ -110,9 +136,15 @@ struct fwnode_handle;
 struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
 					 const char *propname);
 struct gpio_desc *devm_get_gpiod_from_child(struct device *dev,
+					    const char *con_id,
 					    struct fwnode_handle *child);
 #else /* CONFIG_GPIOLIB */
 
+static inline int gpiod_count(struct device *dev, const char *con_id)
+{
+	return 0;
+}
+
 static inline struct gpio_desc *__must_check __gpiod_get(struct device *dev,
 						const char *con_id,
 						enum gpiod_flags flags)
@@ -142,6 +174,20 @@ __gpiod_get_index_optional(struct device *dev, const char *con_id,
 	return ERR_PTR(-ENOSYS);
 }
 
+static inline struct gpio_descs *__must_check
+gpiod_get_array(struct device *dev, const char *con_id,
+		enum gpiod_flags flags)
+{
+	return ERR_PTR(-ENOSYS);
+}
+
+static inline struct gpio_descs *__must_check
+gpiod_get_array_optional(struct device *dev, const char *con_id,
+			 enum gpiod_flags flags)
+{
+	return ERR_PTR(-ENOSYS);
+}
+
 static inline void gpiod_put(struct gpio_desc *desc)
 {
 	might_sleep();
@@ -150,6 +196,14 @@ static inline void gpiod_put(struct gpio_desc *desc)
 	WARN_ON(1);
 }
 
+static inline void gpiod_put_array(struct gpio_descs *descs)
+{
+	might_sleep();
+
+	/* GPIO can never have been requested */
+	WARN_ON(1);
+}
+
 static inline struct gpio_desc *__must_check
 __devm_gpiod_get(struct device *dev,
 		 const char *con_id,
@@ -181,6 +235,20 @@ __devm_gpiod_get_index_optional(struct device *dev, const char *con_id,
 	return ERR_PTR(-ENOSYS);
 }
 
+static inline struct gpio_descs *__must_check
+devm_gpiod_get_array(struct device *dev, const char *con_id,
+		     enum gpiod_flags flags)
+{
+	return ERR_PTR(-ENOSYS);
+}
+
+static inline struct gpio_descs *__must_check
+devm_gpiod_get_array_optional(struct device *dev, const char *con_id,
+			      enum gpiod_flags flags)
+{
+	return ERR_PTR(-ENOSYS);
+}
+
 static inline void devm_gpiod_put(struct device *dev, struct gpio_desc *desc)
 {
 	might_sleep();
@@ -189,6 +257,15 @@ static inline void devm_gpiod_put(struct device *dev, struct gpio_desc *desc)
 	WARN_ON(1);
 }
 
+static inline void devm_gpiod_put_array(struct device *dev,
+					struct gpio_descs *descs)
+{
+	might_sleep();
+
+	/* GPIO can never have been requested */
+	WARN_ON(1);
+}
+
 
 static inline int gpiod_get_direction(const struct gpio_desc *desc)
 {
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index c497c62889d1..f1b36593ec9f 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -6,6 +6,7 @@
 #include <linux/irq.h>
 #include <linux/irqchip/chained_irq.h>
 #include <linux/irqdomain.h>
+#include <linux/pinctrl/pinctrl.h>
 
 struct device;
 struct gpio_desc;
@@ -173,6 +174,53 @@ int gpiochip_irqchip_add(struct gpio_chip *gpiochip,
 
 #endif /* CONFIG_GPIOLIB_IRQCHIP */
 
+#ifdef CONFIG_PINCTRL
+
+/**
+ * struct gpio_pin_range - pin range controlled by a gpio chip
+ * @head: list for maintaining set of pin ranges, used internally
+ * @pctldev: pinctrl device which handles corresponding pins
+ * @range: actual range of pins controlled by a gpio controller
+ */
+
+struct gpio_pin_range {
+	struct list_head node;
+	struct pinctrl_dev *pctldev;
+	struct pinctrl_gpio_range range;
+};
+
+int gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name,
+			   unsigned int gpio_offset, unsigned int pin_offset,
+			   unsigned int npins);
+int gpiochip_add_pingroup_range(struct gpio_chip *chip,
+			struct pinctrl_dev *pctldev,
+			unsigned int gpio_offset, const char *pin_group);
+void gpiochip_remove_pin_ranges(struct gpio_chip *chip);
+
+#else
+
+static inline int
+gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name,
+		       unsigned int gpio_offset, unsigned int pin_offset,
+		       unsigned int npins)
+{
+	return 0;
+}
+static inline int
+gpiochip_add_pingroup_range(struct gpio_chip *chip,
+			struct pinctrl_dev *pctldev,
+			unsigned int gpio_offset, const char *pin_group)
+{
+	return 0;
+}
+
+static inline void
+gpiochip_remove_pin_ranges(struct gpio_chip *chip)
+{
+}
+
+#endif /* CONFIG_PINCTRL */
+
 struct gpio_desc *gpiochip_request_own_desc(struct gpio_chip *chip, u16 hwnum,
 					    const char *label);
 void gpiochip_free_own_desc(struct gpio_desc *desc);