Merge branch 'device-properties'

* device-properties:
  leds: leds-gpio: Fix multiple instances registration without 'label' property
  leds: leds-gpio: Fix legacy GPIO number case
  ACPI / property: Drop size_prop from acpi_dev_get_property_reference()
  leds: leds-gpio: Convert gpio_blink_set() to use GPIO descriptors
  ACPI / GPIO: Document ACPI GPIO mappings API
  net: rfkill: gpio: Add default GPIO driver mappings for ACPI
  ACPI / GPIO: Driver GPIO mappings for ACPI GPIOs
  input: gpio_keys_polled: Make use of device property API
  leds: leds-gpio: Make use of device property API
  gpio: Support for unified device properties interface
  Driver core: Unified interface for firmware node properties
  input: gpio_keys_polled: Add support for GPIO descriptors
  leds: leds-gpio: Add support for GPIO descriptors
  gpio: sch: Consolidate core and resume banks
  gpio / ACPI: Add support for _DSD device properties
  misc: at25: Make use of device property API
  ACPI: Allow drivers to match using Device Tree compatible property
  Driver core: Unified device properties interface for platform firmware
  ACPI: Add support for device specific properties

6 files changed, 319 insertions, 7 deletions

diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 407a12f663eb..10f2ed95645c 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -28,6 +28,7 @@
 #include <linux/errno.h>
 #include <linux/ioport.h>	/* for struct resource */
 #include <linux/device.h>
+#include <linux/property.h>
 
 #ifndef _LINUX
 #define _LINUX
@@ -423,12 +424,8 @@ extern int acpi_nvs_for_each_region(int (*func)(__u64, __u64, void *),
 const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
 					       const struct device *dev);
 
-static inline bool acpi_driver_match_device(struct device *dev,
-					    const struct device_driver *drv)
-{
-	return !!acpi_match_device(drv->acpi_match_table, dev);
-}
-
+extern bool acpi_driver_match_device(struct device *dev,
+				     const struct device_driver *drv);
 int acpi_device_uevent_modalias(struct device *, struct kobj_uevent_env *);
 int acpi_device_modalias(struct device *, char *, int);
 
@@ -443,6 +440,23 @@ struct platform_device *acpi_create_platform_device(struct acpi_device *);
 #define ACPI_COMPANION_SET(dev, adev)	do { } while (0)
 #define ACPI_HANDLE(dev)		(NULL)
 
+struct fwnode_handle;
+
+static inline bool is_acpi_node(struct fwnode_handle *fwnode)
+{
+	return false;
+}
+
+static inline struct acpi_device *acpi_node(struct fwnode_handle *fwnode)
+{
+	return NULL;
+}
+
+static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev)
+{
+	return NULL;
+}
+
 static inline const char *acpi_dev_name(struct acpi_device *adev)
 {
 	return NULL;
@@ -659,4 +673,114 @@ do {									\
 #endif
 #endif
 
+struct acpi_gpio_params {
+	unsigned int crs_entry_index;
+	unsigned int line_index;
+	bool active_low;
+};
+
+struct acpi_gpio_mapping {
+	const char *name;
+	const struct acpi_gpio_params *data;
+	unsigned int size;
+};
+
+#if defined(CONFIG_ACPI) && defined(CONFIG_GPIOLIB)
+int acpi_dev_add_driver_gpios(struct acpi_device *adev,
+			      const struct acpi_gpio_mapping *gpios);
+
+static inline void acpi_dev_remove_driver_gpios(struct acpi_device *adev)
+{
+	if (adev)
+		adev->driver_gpios = NULL;
+}
+#else
+static inline int acpi_dev_add_driver_gpios(struct acpi_device *adev,
+			      const struct acpi_gpio_mapping *gpios)
+{
+	return -ENXIO;
+}
+static inline void acpi_dev_remove_driver_gpios(struct acpi_device *adev) {}
+#endif
+
+/* Device properties */
+
+#define MAX_ACPI_REFERENCE_ARGS	8
+struct acpi_reference_args {
+	struct acpi_device *adev;
+	size_t nargs;
+	u64 args[MAX_ACPI_REFERENCE_ARGS];
+};
+
+#ifdef CONFIG_ACPI
+int acpi_dev_get_property(struct acpi_device *adev, const char *name,
+			  acpi_object_type type, const union acpi_object **obj);
+int acpi_dev_get_property_array(struct acpi_device *adev, const char *name,
+				acpi_object_type type,
+				const union acpi_object **obj);
+int acpi_dev_get_property_reference(struct acpi_device *adev,
+				    const char *name, size_t index,
+				    struct acpi_reference_args *args);
+
+int acpi_dev_prop_get(struct acpi_device *adev, const char *propname,
+		      void **valptr);
+int acpi_dev_prop_read_single(struct acpi_device *adev, const char *propname,
+			      enum dev_prop_type proptype, void *val);
+int acpi_dev_prop_read(struct acpi_device *adev, const char *propname,
+		       enum dev_prop_type proptype, void *val, size_t nval);
+
+struct acpi_device *acpi_get_next_child(struct device *dev,
+					struct acpi_device *child);
+#else
+static inline int acpi_dev_get_property(struct acpi_device *adev,
+					const char *name, acpi_object_type type,
+					const union acpi_object **obj)
+{
+	return -ENXIO;
+}
+static inline int acpi_dev_get_property_array(struct acpi_device *adev,
+					      const char *name,
+					      acpi_object_type type,
+					      const union acpi_object **obj)
+{
+	return -ENXIO;
+}
+static inline int acpi_dev_get_property_reference(struct acpi_device *adev,
+				const char *name, const char *cells_name,
+				size_t index, struct acpi_reference_args *args)
+{
+	return -ENXIO;
+}
+
+static inline int acpi_dev_prop_get(struct acpi_device *adev,
+				    const char *propname,
+				    void **valptr)
+{
+	return -ENXIO;
+}
+
+static inline int acpi_dev_prop_read_single(struct acpi_device *adev,
+					    const char *propname,
+					    enum dev_prop_type proptype,
+					    void *val)
+{
+	return -ENXIO;
+}
+
+static inline int acpi_dev_prop_read(struct acpi_device *adev,
+				     const char *propname,
+				     enum dev_prop_type proptype,
+				     void *val, size_t nval)
+{
+	return -ENXIO;
+}
+
+static inline struct acpi_device *acpi_get_next_child(struct device *dev,
+						      struct acpi_device *child)
+{
+	return NULL;
+}
+
+#endif
+
 #endif	/*_LINUX_ACPI_H*/
diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h
index 12f146fa6604..00b1b70d68ba 100644
--- a/include/linux/gpio/consumer.h
+++ b/include/linux/gpio/consumer.h
@@ -94,6 +94,13 @@ int gpiod_to_irq(const struct gpio_desc *desc);
 struct gpio_desc *gpio_to_desc(unsigned gpio);
 int desc_to_gpio(const struct gpio_desc *desc);
 
+/* Child properties interface */
+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,
+					    struct fwnode_handle *child);
 #else /* CONFIG_GPIOLIB */
 
 static inline struct gpio_desc *__must_check __gpiod_get(struct device *dev,
diff --git a/include/linux/gpio_keys.h b/include/linux/gpio_keys.h
index 8b622468952c..ee2d8c6f9130 100644
--- a/include/linux/gpio_keys.h
+++ b/include/linux/gpio_keys.h
@@ -2,6 +2,7 @@
 #define _GPIO_KEYS_H
 
 struct device;
+struct gpio_desc;
 
 /**
  * struct gpio_keys_button - configuration parameters
@@ -17,6 +18,7 @@ struct device;
  *			disable button via sysfs
  * @value:		axis value for %EV_ABS
  * @irq:		Irq number in case of interrupt keys
+ * @gpiod:		GPIO descriptor
  */
 struct gpio_keys_button {
 	unsigned int code;
@@ -29,6 +31,7 @@ struct gpio_keys_button {
 	bool can_disable;
 	int value;
 	unsigned int irq;
+	struct gpio_desc *gpiod;
 };
 
 /**
diff --git a/include/linux/leds.h b/include/linux/leds.h
index a57611d0c94e..361101fef270 100644
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -261,6 +261,7 @@ struct gpio_led {
 	unsigned	retain_state_suspended : 1;
 	unsigned	default_state : 2;
 	/* default_state should be one of LEDS_GPIO_DEFSTATE_(ON|OFF|KEEP) */
+	struct gpio_desc *gpiod;
 };
 #define LEDS_GPIO_DEFSTATE_OFF		0
 #define LEDS_GPIO_DEFSTATE_ON		1
@@ -273,7 +274,7 @@ struct gpio_led_platform_data {
 #define GPIO_LED_NO_BLINK_LOW	0	/* No blink GPIO state low */
 #define GPIO_LED_NO_BLINK_HIGH	1	/* No blink GPIO state high */
 #define GPIO_LED_BLINK		2	/* Please, blink */
-	int		(*gpio_blink_set)(unsigned gpio, int state,
+	int		(*gpio_blink_set)(struct gpio_desc *desc, int state,
 					unsigned long *delay_on,
 					unsigned long *delay_off);
 };
diff --git a/include/linux/of.h b/include/linux/of.h
index 29f0adc5f3e4..cf79be1441d2 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -23,6 +23,7 @@
 #include <linux/spinlock.h>
 #include <linux/topology.h>
 #include <linux/notifier.h>
+#include <linux/property.h>
 
 #include <asm/byteorder.h>
 #include <asm/errno.h>
@@ -49,6 +50,7 @@ struct device_node {
 	const char *type;
 	phandle phandle;
 	const char *full_name;
+	struct fwnode_handle fwnode;
 
 	struct	property *properties;
 	struct	property *deadprops;	/* removed properties */
@@ -79,6 +81,7 @@ extern struct kobj_type of_node_ktype;
 static inline void of_node_init(struct device_node *node)
 {
 	kobject_init(&node->kobj, &of_node_ktype);
+	node->fwnode.type = FWNODE_OF;
 }
 
 /* true when node is initialized */
@@ -114,6 +117,16 @@ extern struct device_node *of_aliases;
 extern struct device_node *of_stdout;
 extern raw_spinlock_t devtree_lock;
 
+static inline bool is_of_node(struct fwnode_handle *fwnode)
+{
+	return fwnode && fwnode->type == FWNODE_OF;
+}
+
+static inline struct device_node *of_node(struct fwnode_handle *fwnode)
+{
+	return fwnode ? container_of(fwnode, struct device_node, fwnode) : NULL;
+}
+
 static inline bool of_have_populated_dt(void)
 {
 	return of_allnodes != NULL;
@@ -263,6 +276,10 @@ extern int of_property_read_u32_array(const struct device_node *np,
 				      size_t sz);
 extern int of_property_read_u64(const struct device_node *np,
 				const char *propname, u64 *out_value);
+extern int of_property_read_u64_array(const struct device_node *np,
+				      const char *propname,
+				      u64 *out_values,
+				      size_t sz);
 
 extern int of_property_read_string(struct device_node *np,
 				   const char *propname,
@@ -355,6 +372,16 @@ bool of_console_check(struct device_node *dn, char *name, int index);
 
 #else /* CONFIG_OF */
 
+static inline bool is_of_node(struct fwnode_handle *fwnode)
+{
+	return false;
+}
+
+static inline struct device_node *of_node(struct fwnode_handle *fwnode)
+{
+	return NULL;
+}
+
 static inline const char* of_node_full_name(const struct device_node *np)
 {
 	return "<no-node>";
@@ -477,6 +504,13 @@ static inline int of_property_read_u32_array(const struct device_node *np,
 	return -ENOSYS;
 }
 
+static inline int of_property_read_u64_array(const struct device_node *np,
+					     const char *propname,
+					     u64 *out_values, size_t sz)
+{
+	return -ENOSYS;
+}
+
 static inline int of_property_read_string(struct device_node *np,
 					  const char *propname,
 					  const char **out_string)
diff --git a/include/linux/property.h b/include/linux/property.h
new file mode 100644
index 000000000000..a6a3d98bd7e9
--- /dev/null
+++ b/include/linux/property.h
@@ -0,0 +1,143 @@
+/*
+ * property.h - Unified device property interface.
+ *
+ * Copyright (C) 2014, Intel Corporation
+ * Authors: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
+ *          Mika Westerberg <mika.westerberg@linux.intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _LINUX_PROPERTY_H_
+#define _LINUX_PROPERTY_H_
+
+#include <linux/types.h>
+
+struct device;
+
+enum dev_prop_type {
+	DEV_PROP_U8,
+	DEV_PROP_U16,
+	DEV_PROP_U32,
+	DEV_PROP_U64,
+	DEV_PROP_STRING,
+	DEV_PROP_MAX,
+};
+
+bool device_property_present(struct device *dev, const char *propname);
+int device_property_read_u8_array(struct device *dev, const char *propname,
+				  u8 *val, size_t nval);
+int device_property_read_u16_array(struct device *dev, const char *propname,
+				   u16 *val, size_t nval);
+int device_property_read_u32_array(struct device *dev, const char *propname,
+				   u32 *val, size_t nval);
+int device_property_read_u64_array(struct device *dev, const char *propname,
+				   u64 *val, size_t nval);
+int device_property_read_string_array(struct device *dev, const char *propname,
+				      const char **val, size_t nval);
+int device_property_read_string(struct device *dev, const char *propname,
+				const char **val);
+
+enum fwnode_type {
+	FWNODE_INVALID = 0,
+	FWNODE_OF,
+	FWNODE_ACPI,
+};
+
+struct fwnode_handle {
+	enum fwnode_type type;
+};
+
+bool fwnode_property_present(struct fwnode_handle *fwnode, const char *propname);
+int fwnode_property_read_u8_array(struct fwnode_handle *fwnode,
+				  const char *propname, u8 *val,
+				  size_t nval);
+int fwnode_property_read_u16_array(struct fwnode_handle *fwnode,
+				   const char *propname, u16 *val,
+				   size_t nval);
+int fwnode_property_read_u32_array(struct fwnode_handle *fwnode,
+				   const char *propname, u32 *val,
+				   size_t nval);
+int fwnode_property_read_u64_array(struct fwnode_handle *fwnode,
+				   const char *propname, u64 *val,
+				   size_t nval);
+int fwnode_property_read_string_array(struct fwnode_handle *fwnode,
+				      const char *propname, const char **val,
+				      size_t nval);
+int fwnode_property_read_string(struct fwnode_handle *fwnode,
+				const char *propname, const char **val);
+
+struct fwnode_handle *device_get_next_child_node(struct device *dev,
+						 struct fwnode_handle *child);
+
+#define device_for_each_child_node(dev, child) \
+	for (child = device_get_next_child_node(dev, NULL); child; \
+	     child = device_get_next_child_node(dev, child))
+
+void fwnode_handle_put(struct fwnode_handle *fwnode);
+
+unsigned int device_get_child_node_count(struct device *dev);
+
+static inline bool device_property_read_bool(struct device *dev,
+					     const char *propname)
+{
+	return device_property_present(dev, propname);
+}
+
+static inline int device_property_read_u8(struct device *dev,
+					  const char *propname, u8 *val)
+{
+	return device_property_read_u8_array(dev, propname, val, 1);
+}
+
+static inline int device_property_read_u16(struct device *dev,
+					   const char *propname, u16 *val)
+{
+	return device_property_read_u16_array(dev, propname, val, 1);
+}
+
+static inline int device_property_read_u32(struct device *dev,
+					   const char *propname, u32 *val)
+{
+	return device_property_read_u32_array(dev, propname, val, 1);
+}
+
+static inline int device_property_read_u64(struct device *dev,
+					   const char *propname, u64 *val)
+{
+	return device_property_read_u64_array(dev, propname, val, 1);
+}
+
+static inline bool fwnode_property_read_bool(struct fwnode_handle *fwnode,
+					     const char *propname)
+{
+	return fwnode_property_present(fwnode, propname);
+}
+
+static inline int fwnode_property_read_u8(struct fwnode_handle *fwnode,
+					  const char *propname, u8 *val)
+{
+	return fwnode_property_read_u8_array(fwnode, propname, val, 1);
+}
+
+static inline int fwnode_property_read_u16(struct fwnode_handle *fwnode,
+					   const char *propname, u16 *val)
+{
+	return fwnode_property_read_u16_array(fwnode, propname, val, 1);
+}
+
+static inline int fwnode_property_read_u32(struct fwnode_handle *fwnode,
+					   const char *propname, u32 *val)
+{
+	return fwnode_property_read_u32_array(fwnode, propname, val, 1);
+}
+
+static inline int fwnode_property_read_u64(struct fwnode_handle *fwnode,
+					   const char *propname, u64 *val)
+{
+	return fwnode_property_read_u64_array(fwnode, propname, val, 1);
+}
+
+#endif /* _LINUX_PROPERTY_H_ */