v4.19.13 snapshot.
diff --git a/include/linux/gpio/aspeed.h b/include/linux/gpio/aspeed.h
new file mode 100644
index 0000000..1bfb3cd
--- /dev/null
+++ b/include/linux/gpio/aspeed.h
@@ -0,0 +1,15 @@
+#ifndef __GPIO_ASPEED_H
+#define __GPIO_ASPEED_H
+
+struct aspeed_gpio_copro_ops {
+ int (*request_access)(void *data);
+ int (*release_access)(void *data);
+};
+
+int aspeed_gpio_copro_grab_gpio(struct gpio_desc *desc,
+ u16 *vreg_offset, u16 *dreg_offset, u8 *bit);
+int aspeed_gpio_copro_release_gpio(struct gpio_desc *desc);
+int aspeed_gpio_copro_set_ops(const struct aspeed_gpio_copro_ops *ops, void *data);
+
+
+#endif /* __GPIO_ASPEED_H */
diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h
new file mode 100644
index 0000000..21ddbe4
--- /dev/null
+++ b/include/linux/gpio/consumer.h
@@ -0,0 +1,559 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_GPIO_CONSUMER_H
+#define __LINUX_GPIO_CONSUMER_H
+
+#include <linux/bug.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+
+struct device;
+
+/**
+ * Opaque descriptor for a GPIO. These are obtained using gpiod_get() and are
+ * preferable to the old integer-based handles.
+ *
+ * Contrary to integers, a pointer to a gpio_desc is guaranteed to be valid
+ * until the GPIO is released.
+ */
+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)
+#define GPIOD_FLAGS_BIT_OPEN_DRAIN BIT(3)
+
+/**
+ * Optional flags that can be passed to one of gpiod_* to configure direction
+ * and output value. These values cannot be OR'd.
+ */
+enum gpiod_flags {
+ GPIOD_ASIS = 0,
+ GPIOD_IN = GPIOD_FLAGS_BIT_DIR_SET,
+ GPIOD_OUT_LOW = GPIOD_FLAGS_BIT_DIR_SET | GPIOD_FLAGS_BIT_DIR_OUT,
+ GPIOD_OUT_HIGH = GPIOD_FLAGS_BIT_DIR_SET | GPIOD_FLAGS_BIT_DIR_OUT |
+ GPIOD_FLAGS_BIT_DIR_VAL,
+ GPIOD_OUT_LOW_OPEN_DRAIN = GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_OPEN_DRAIN,
+ GPIOD_OUT_HIGH_OPEN_DRAIN = GPIOD_OUT_HIGH | GPIOD_FLAGS_BIT_OPEN_DRAIN,
+};
+
+#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,
+ enum gpiod_flags flags);
+struct gpio_desc *__must_check gpiod_get_index(struct device *dev,
+ const char *con_id,
+ unsigned int idx,
+ enum gpiod_flags flags);
+struct gpio_desc *__must_check gpiod_get_optional(struct device *dev,
+ const char *con_id,
+ enum gpiod_flags flags);
+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,
+ enum gpiod_flags flags);
+struct gpio_desc *__must_check devm_gpiod_get_index(struct device *dev,
+ const char *con_id,
+ unsigned int idx,
+ enum gpiod_flags flags);
+struct gpio_desc *__must_check devm_gpiod_get_optional(struct device *dev,
+ const char *con_id,
+ enum gpiod_flags flags);
+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);
+int gpiod_direction_output(struct gpio_desc *desc, int value);
+int gpiod_direction_output_raw(struct gpio_desc *desc, int value);
+
+/* Value get/set from non-sleeping context */
+int gpiod_get_value(const struct gpio_desc *desc);
+int gpiod_get_array_value(unsigned int array_size,
+ struct gpio_desc **desc_array, int *value_array);
+void gpiod_set_value(struct gpio_desc *desc, int value);
+void gpiod_set_array_value(unsigned int array_size,
+ struct gpio_desc **desc_array, int *value_array);
+int gpiod_get_raw_value(const struct gpio_desc *desc);
+int gpiod_get_raw_array_value(unsigned int array_size,
+ struct gpio_desc **desc_array,
+ int *value_array);
+void gpiod_set_raw_value(struct gpio_desc *desc, int value);
+int gpiod_set_raw_array_value(unsigned int array_size,
+ struct gpio_desc **desc_array,
+ int *value_array);
+
+/* Value get/set from sleeping context */
+int gpiod_get_value_cansleep(const struct gpio_desc *desc);
+int gpiod_get_array_value_cansleep(unsigned int array_size,
+ struct gpio_desc **desc_array,
+ int *value_array);
+void gpiod_set_value_cansleep(struct gpio_desc *desc, int value);
+void gpiod_set_array_value_cansleep(unsigned int array_size,
+ struct gpio_desc **desc_array,
+ int *value_array);
+int gpiod_get_raw_value_cansleep(const struct gpio_desc *desc);
+int gpiod_get_raw_array_value_cansleep(unsigned int array_size,
+ struct gpio_desc **desc_array,
+ int *value_array);
+void gpiod_set_raw_value_cansleep(struct gpio_desc *desc, int value);
+int gpiod_set_raw_array_value_cansleep(unsigned int array_size,
+ struct gpio_desc **desc_array,
+ int *value_array);
+
+int gpiod_set_debounce(struct gpio_desc *desc, unsigned debounce);
+int gpiod_set_transitory(struct gpio_desc *desc, bool transitory);
+
+int gpiod_is_active_low(const struct gpio_desc *desc);
+int gpiod_cansleep(const struct gpio_desc *desc);
+
+int gpiod_to_irq(const struct gpio_desc *desc);
+void gpiod_set_consumer_name(struct gpio_desc *desc, const char *name);
+
+/* Convert between the old gpio_ and new gpiod_ interfaces */
+struct gpio_desc *gpio_to_desc(unsigned gpio);
+int desc_to_gpio(const struct gpio_desc *desc);
+
+/* Child properties interface */
+struct device_node;
+struct fwnode_handle;
+
+struct gpio_desc *devm_gpiod_get_from_of_node(struct device *dev,
+ struct device_node *node,
+ const char *propname, int index,
+ enum gpiod_flags dflags,
+ const char *label);
+struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
+ const char *propname, int index,
+ enum gpiod_flags dflags,
+ const char *label);
+struct gpio_desc *devm_fwnode_get_index_gpiod_from_child(struct device *dev,
+ const char *con_id, int index,
+ struct fwnode_handle *child,
+ enum gpiod_flags flags,
+ const char *label);
+
+#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)
+{
+ return ERR_PTR(-ENOSYS);
+}
+static inline struct gpio_desc *__must_check
+gpiod_get_index(struct device *dev,
+ const char *con_id,
+ unsigned int idx,
+ enum gpiod_flags flags)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+static inline struct gpio_desc *__must_check
+gpiod_get_optional(struct device *dev, const char *con_id,
+ enum gpiod_flags flags)
+{
+ return NULL;
+}
+
+static inline struct gpio_desc *__must_check
+gpiod_get_index_optional(struct device *dev, const char *con_id,
+ unsigned int index, enum gpiod_flags flags)
+{
+ return NULL;
+}
+
+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 NULL;
+}
+
+static inline void gpiod_put(struct gpio_desc *desc)
+{
+ might_sleep();
+
+ /* GPIO can never have been requested */
+ 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,
+ enum gpiod_flags flags)
+{
+ return ERR_PTR(-ENOSYS);
+}
+static inline
+struct gpio_desc *__must_check
+devm_gpiod_get_index(struct device *dev,
+ const char *con_id,
+ unsigned int idx,
+ enum gpiod_flags flags)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+static inline struct gpio_desc *__must_check
+devm_gpiod_get_optional(struct device *dev, const char *con_id,
+ enum gpiod_flags flags)
+{
+ return NULL;
+}
+
+static inline struct gpio_desc *__must_check
+devm_gpiod_get_index_optional(struct device *dev, const char *con_id,
+ unsigned int index, enum gpiod_flags flags)
+{
+ return NULL;
+}
+
+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 NULL;
+}
+
+static inline void devm_gpiod_put(struct device *dev, struct gpio_desc *desc)
+{
+ might_sleep();
+
+ /* GPIO can never have been requested */
+ 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)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+ return -ENOSYS;
+}
+static inline int gpiod_direction_input(struct gpio_desc *desc)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+ return -ENOSYS;
+}
+static inline int gpiod_direction_output(struct gpio_desc *desc, int value)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+ return -ENOSYS;
+}
+static inline int gpiod_direction_output_raw(struct gpio_desc *desc, int value)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+ return -ENOSYS;
+}
+
+
+static inline int gpiod_get_value(const struct gpio_desc *desc)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+ return 0;
+}
+static inline int gpiod_get_array_value(unsigned int array_size,
+ struct gpio_desc **desc_array,
+ int *value_array)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+ return 0;
+}
+static inline void gpiod_set_value(struct gpio_desc *desc, int value)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+}
+static inline void gpiod_set_array_value(unsigned int array_size,
+ struct gpio_desc **desc_array,
+ int *value_array)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+}
+static inline int gpiod_get_raw_value(const struct gpio_desc *desc)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+ return 0;
+}
+static inline int gpiod_get_raw_array_value(unsigned int array_size,
+ struct gpio_desc **desc_array,
+ int *value_array)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+ return 0;
+}
+static inline void gpiod_set_raw_value(struct gpio_desc *desc, int value)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+}
+static inline int gpiod_set_raw_array_value(unsigned int array_size,
+ struct gpio_desc **desc_array,
+ int *value_array)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+ return 0;
+}
+
+static inline int gpiod_get_value_cansleep(const struct gpio_desc *desc)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+ return 0;
+}
+static inline int gpiod_get_array_value_cansleep(unsigned int array_size,
+ struct gpio_desc **desc_array,
+ int *value_array)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+ return 0;
+}
+static inline void gpiod_set_value_cansleep(struct gpio_desc *desc, int value)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+}
+static inline void gpiod_set_array_value_cansleep(unsigned int array_size,
+ struct gpio_desc **desc_array,
+ int *value_array)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+}
+static inline int gpiod_get_raw_value_cansleep(const struct gpio_desc *desc)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+ return 0;
+}
+static inline int gpiod_get_raw_array_value_cansleep(unsigned int array_size,
+ struct gpio_desc **desc_array,
+ int *value_array)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+ return 0;
+}
+static inline void gpiod_set_raw_value_cansleep(struct gpio_desc *desc,
+ int value)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+}
+static inline int gpiod_set_raw_array_value_cansleep(unsigned int array_size,
+ struct gpio_desc **desc_array,
+ int *value_array)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+ return 0;
+}
+
+static inline int gpiod_set_debounce(struct gpio_desc *desc, unsigned debounce)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+ return -ENOSYS;
+}
+
+static inline int gpiod_set_transitory(struct gpio_desc *desc, bool transitory)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+ return -ENOSYS;
+}
+
+static inline int gpiod_is_active_low(const struct gpio_desc *desc)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+ return 0;
+}
+static inline int gpiod_cansleep(const struct gpio_desc *desc)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+ return 0;
+}
+
+static inline int gpiod_to_irq(const struct gpio_desc *desc)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+ return -EINVAL;
+}
+
+static inline void gpiod_set_consumer_name(struct gpio_desc *desc, const char *name)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+}
+
+static inline struct gpio_desc *gpio_to_desc(unsigned gpio)
+{
+ return ERR_PTR(-EINVAL);
+}
+
+static inline int desc_to_gpio(const struct gpio_desc *desc)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+ return -EINVAL;
+}
+
+/* Child properties interface */
+struct device_node;
+struct fwnode_handle;
+
+static inline
+struct gpio_desc *devm_gpiod_get_from_of_node(struct device *dev,
+ struct device_node *node,
+ const char *propname, int index,
+ enum gpiod_flags dflags,
+ const char *label)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+static inline
+struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
+ const char *propname, int index,
+ enum gpiod_flags dflags,
+ const char *label)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+static inline
+struct gpio_desc *devm_fwnode_get_index_gpiod_from_child(struct device *dev,
+ const char *con_id, int index,
+ struct fwnode_handle *child,
+ enum gpiod_flags flags,
+ const char *label)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+#endif /* CONFIG_GPIOLIB */
+
+static inline
+struct gpio_desc *devm_fwnode_get_gpiod_from_child(struct device *dev,
+ const char *con_id,
+ struct fwnode_handle *child,
+ enum gpiod_flags flags,
+ const char *label)
+{
+ return devm_fwnode_get_index_gpiod_from_child(dev, con_id, 0, child,
+ flags, label);
+}
+
+#if IS_ENABLED(CONFIG_GPIOLIB) && IS_ENABLED(CONFIG_GPIO_SYSFS)
+
+int gpiod_export(struct gpio_desc *desc, bool direction_may_change);
+int gpiod_export_link(struct device *dev, const char *name,
+ struct gpio_desc *desc);
+void gpiod_unexport(struct gpio_desc *desc);
+
+#else /* CONFIG_GPIOLIB && CONFIG_GPIO_SYSFS */
+
+static inline int gpiod_export(struct gpio_desc *desc,
+ bool direction_may_change)
+{
+ return -ENOSYS;
+}
+
+static inline int gpiod_export_link(struct device *dev, const char *name,
+ struct gpio_desc *desc)
+{
+ return -ENOSYS;
+}
+
+static inline void gpiod_unexport(struct gpio_desc *desc)
+{
+}
+
+#endif /* CONFIG_GPIOLIB && CONFIG_GPIO_SYSFS */
+
+#endif
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
new file mode 100644
index 0000000..a4d5eb3
--- /dev/null
+++ b/include/linux/gpio/driver.h
@@ -0,0 +1,594 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_GPIO_DRIVER_H
+#define __LINUX_GPIO_DRIVER_H
+
+#include <linux/device.h>
+#include <linux/types.h>
+#include <linux/irq.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/irqdomain.h>
+#include <linux/lockdep.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinconf-generic.h>
+
+struct gpio_desc;
+struct of_phandle_args;
+struct device_node;
+struct seq_file;
+struct gpio_device;
+struct module;
+
+#ifdef CONFIG_GPIOLIB
+
+#ifdef CONFIG_GPIOLIB_IRQCHIP
+/**
+ * struct gpio_irq_chip - GPIO interrupt controller
+ */
+struct gpio_irq_chip {
+ /**
+ * @chip:
+ *
+ * GPIO IRQ chip implementation, provided by GPIO driver.
+ */
+ struct irq_chip *chip;
+
+ /**
+ * @domain:
+ *
+ * Interrupt translation domain; responsible for mapping between GPIO
+ * hwirq number and Linux IRQ number.
+ */
+ struct irq_domain *domain;
+
+ /**
+ * @domain_ops:
+ *
+ * Table of interrupt domain operations for this IRQ chip.
+ */
+ const struct irq_domain_ops *domain_ops;
+
+ /**
+ * @handler:
+ *
+ * The IRQ handler to use (often a predefined IRQ core function) for
+ * GPIO IRQs, provided by GPIO driver.
+ */
+ irq_flow_handler_t handler;
+
+ /**
+ * @default_type:
+ *
+ * Default IRQ triggering type applied during GPIO driver
+ * initialization, provided by GPIO driver.
+ */
+ unsigned int default_type;
+
+ /**
+ * @lock_key:
+ *
+ * Per GPIO IRQ chip lockdep classes.
+ */
+ struct lock_class_key *lock_key;
+ struct lock_class_key *request_key;
+
+ /**
+ * @parent_handler:
+ *
+ * The interrupt handler for the GPIO chip's parent interrupts, may be
+ * NULL if the parent interrupts are nested rather than cascaded.
+ */
+ irq_flow_handler_t parent_handler;
+
+ /**
+ * @parent_handler_data:
+ *
+ * Data associated, and passed to, the handler for the parent
+ * interrupt.
+ */
+ void *parent_handler_data;
+
+ /**
+ * @num_parents:
+ *
+ * The number of interrupt parents of a GPIO chip.
+ */
+ unsigned int num_parents;
+
+ /**
+ * @parent_irq:
+ *
+ * For use by gpiochip_set_cascaded_irqchip()
+ */
+ unsigned int parent_irq;
+
+ /**
+ * @parents:
+ *
+ * A list of interrupt parents of a GPIO chip. This is owned by the
+ * driver, so the core will only reference this list, not modify it.
+ */
+ unsigned int *parents;
+
+ /**
+ * @map:
+ *
+ * A list of interrupt parents for each line of a GPIO chip.
+ */
+ unsigned int *map;
+
+ /**
+ * @threaded:
+ *
+ * True if set the interrupt handling uses nested threads.
+ */
+ bool threaded;
+
+ /**
+ * @need_valid_mask:
+ *
+ * If set core allocates @valid_mask with all bits set to one.
+ */
+ bool need_valid_mask;
+
+ /**
+ * @valid_mask:
+ *
+ * If not %NULL holds bitmask of GPIOs which are valid to be included
+ * in IRQ domain of the chip.
+ */
+ unsigned long *valid_mask;
+
+ /**
+ * @first:
+ *
+ * Required for static IRQ allocation. If set, irq_domain_add_simple()
+ * will allocate and map all IRQs during initialization.
+ */
+ unsigned int first;
+};
+
+static inline struct gpio_irq_chip *to_gpio_irq_chip(struct irq_chip *chip)
+{
+ return container_of(chip, struct gpio_irq_chip, chip);
+}
+#endif
+
+/**
+ * struct gpio_chip - abstract a GPIO controller
+ * @label: a functional name for the GPIO device, such as a part
+ * number or the name of the SoC IP-block implementing it.
+ * @gpiodev: the internal state holder, opaque struct
+ * @parent: optional parent device providing the GPIOs
+ * @owner: helps prevent removal of modules exporting active GPIOs
+ * @request: optional hook for chip-specific activation, such as
+ * enabling module power and clock; may sleep
+ * @free: optional hook for chip-specific deactivation, such as
+ * disabling module power and clock; may sleep
+ * @get_direction: returns direction for signal "offset", 0=out, 1=in,
+ * (same as GPIOF_DIR_XXX), or negative error
+ * @direction_input: configures signal "offset" as input, or returns error
+ * @direction_output: configures signal "offset" as output, or returns error
+ * @get: returns value for signal "offset", 0=low, 1=high, or negative error
+ * @get_multiple: reads values for multiple signals defined by "mask" and
+ * stores them in "bits", returns 0 on success or negative error
+ * @set: assigns output value for signal "offset"
+ * @set_multiple: assigns output values for multiple signals defined by "mask"
+ * @set_config: optional hook for all kinds of settings. Uses the same
+ * packed config format as generic pinconf.
+ * @to_irq: optional hook supporting non-static gpio_to_irq() mappings;
+ * implementation may not sleep
+ * @dbg_show: optional routine to show contents in debugfs; default code
+ * will be used when this is omitted, but custom code can show extra
+ * state (such as pullup/pulldown configuration).
+ * @base: identifies the first GPIO number handled by this chip;
+ * or, if negative during registration, requests dynamic ID allocation.
+ * DEPRECATION: providing anything non-negative and nailing the base
+ * offset of GPIO chips is deprecated. Please pass -1 as base to
+ * let gpiolib select the chip base in all possible cases. We want to
+ * get rid of the static GPIO number space in the long run.
+ * @ngpio: the number of GPIOs handled by this controller; the last GPIO
+ * handled is (base + ngpio - 1).
+ * @names: if set, must be an array of strings to use as alternative
+ * names for the GPIOs in this chip. Any entry in the array
+ * may be NULL if there is no alias for the GPIO, however the
+ * array must be @ngpio entries long. A name can include a single printk
+ * format specifier for an unsigned int. It is substituted by the actual
+ * number of the gpio.
+ * @can_sleep: flag must be set iff get()/set() methods sleep, as they
+ * must while accessing GPIO expander chips over I2C or SPI. This
+ * implies that if the chip supports IRQs, these IRQs need to be threaded
+ * as the chip access may sleep when e.g. reading out the IRQ status
+ * registers.
+ * @read_reg: reader function for generic GPIO
+ * @write_reg: writer function for generic GPIO
+ * @be_bits: if the generic GPIO has big endian bit order (bit 31 is representing
+ * line 0, bit 30 is line 1 ... bit 0 is line 31) this is set to true by the
+ * generic GPIO core. It is for internal housekeeping only.
+ * @reg_dat: data (in) register for generic GPIO
+ * @reg_set: output set register (out=high) for generic GPIO
+ * @reg_clr: output clear register (out=low) for generic GPIO
+ * @reg_dir: direction setting register for generic GPIO
+ * @bgpio_dir_inverted: indicates that the direction register is inverted
+ * (gpiolib private state variable)
+ * @bgpio_bits: number of register bits used for a generic GPIO i.e.
+ * <register width> * 8
+ * @bgpio_lock: used to lock chip->bgpio_data. Also, this is needed to keep
+ * shadowed and real data registers writes together.
+ * @bgpio_data: shadowed data register for generic GPIO to clear/set bits
+ * safely.
+ * @bgpio_dir: shadowed direction register for generic GPIO to clear/set
+ * direction safely.
+ *
+ * A gpio_chip can help platforms abstract various sources of GPIOs so
+ * they can all be accessed through a common programing interface.
+ * Example sources would be SOC controllers, FPGAs, multifunction
+ * chips, dedicated GPIO expanders, and so on.
+ *
+ * Each chip controls a number of signals, identified in method calls
+ * by "offset" values in the range 0..(@ngpio - 1). When those signals
+ * are referenced through calls like gpio_get_value(gpio), the offset
+ * is calculated by subtracting @base from the gpio number.
+ */
+struct gpio_chip {
+ const char *label;
+ struct gpio_device *gpiodev;
+ struct device *parent;
+ struct module *owner;
+
+ int (*request)(struct gpio_chip *chip,
+ unsigned offset);
+ void (*free)(struct gpio_chip *chip,
+ unsigned offset);
+ int (*get_direction)(struct gpio_chip *chip,
+ unsigned offset);
+ int (*direction_input)(struct gpio_chip *chip,
+ unsigned offset);
+ int (*direction_output)(struct gpio_chip *chip,
+ unsigned offset, int value);
+ int (*get)(struct gpio_chip *chip,
+ unsigned offset);
+ int (*get_multiple)(struct gpio_chip *chip,
+ unsigned long *mask,
+ unsigned long *bits);
+ void (*set)(struct gpio_chip *chip,
+ unsigned offset, int value);
+ void (*set_multiple)(struct gpio_chip *chip,
+ unsigned long *mask,
+ unsigned long *bits);
+ int (*set_config)(struct gpio_chip *chip,
+ unsigned offset,
+ unsigned long config);
+ int (*to_irq)(struct gpio_chip *chip,
+ unsigned offset);
+
+ void (*dbg_show)(struct seq_file *s,
+ struct gpio_chip *chip);
+ int base;
+ u16 ngpio;
+ const char *const *names;
+ bool can_sleep;
+
+#if IS_ENABLED(CONFIG_GPIO_GENERIC)
+ unsigned long (*read_reg)(void __iomem *reg);
+ void (*write_reg)(void __iomem *reg, unsigned long data);
+ bool be_bits;
+ void __iomem *reg_dat;
+ void __iomem *reg_set;
+ void __iomem *reg_clr;
+ void __iomem *reg_dir;
+ bool bgpio_dir_inverted;
+ int bgpio_bits;
+ spinlock_t bgpio_lock;
+ unsigned long bgpio_data;
+ unsigned long bgpio_dir;
+#endif
+
+#ifdef CONFIG_GPIOLIB_IRQCHIP
+ /*
+ * With CONFIG_GPIOLIB_IRQCHIP we get an irqchip inside the gpiolib
+ * to handle IRQs for most practical cases.
+ */
+
+ /**
+ * @irq:
+ *
+ * Integrates interrupt chip functionality with the GPIO chip. Can be
+ * used to handle IRQs for most practical cases.
+ */
+ struct gpio_irq_chip irq;
+#endif
+
+ /**
+ * @need_valid_mask:
+ *
+ * If set core allocates @valid_mask with all bits set to one.
+ */
+ bool need_valid_mask;
+
+ /**
+ * @valid_mask:
+ *
+ * If not %NULL holds bitmask of GPIOs which are valid to be used
+ * from the chip.
+ */
+ unsigned long *valid_mask;
+
+#if defined(CONFIG_OF_GPIO)
+ /*
+ * If CONFIG_OF is enabled, then all GPIO controllers described in 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:
+ *
+ * Number of cells used to form the GPIO specifier.
+ */
+ unsigned int of_gpio_n_cells;
+
+ /**
+ * @of_xlate:
+ *
+ * Callback to translate a device tree GPIO specifier into a chip-
+ * relative GPIO number and flags.
+ */
+ int (*of_xlate)(struct gpio_chip *gc,
+ const struct of_phandle_args *gpiospec, u32 *flags);
+#endif
+};
+
+extern const char *gpiochip_is_requested(struct gpio_chip *chip,
+ unsigned offset);
+
+/* add/remove chips */
+extern int gpiochip_add_data_with_key(struct gpio_chip *chip, void *data,
+ struct lock_class_key *lock_key,
+ struct lock_class_key *request_key);
+
+/**
+ * gpiochip_add_data() - register a gpio_chip
+ * @chip: the chip to register, with chip->base initialized
+ * @data: driver-private data associated with this chip
+ *
+ * Context: potentially before irqs will work
+ *
+ * When gpiochip_add_data() is called very early during boot, so that GPIOs
+ * can be freely used, the chip->parent device must be registered before
+ * the gpio framework's arch_initcall(). Otherwise sysfs initialization
+ * for GPIOs will fail rudely.
+ *
+ * gpiochip_add_data() must only be called after gpiolib initialization,
+ * ie after core_initcall().
+ *
+ * If chip->base is negative, this requests dynamic assignment of
+ * a range of valid GPIOs.
+ *
+ * Returns:
+ * A negative errno if the chip can't be registered, such as because the
+ * chip->base is invalid or already associated with a different chip.
+ * Otherwise it returns zero as a success code.
+ */
+#ifdef CONFIG_LOCKDEP
+#define gpiochip_add_data(chip, data) ({ \
+ static struct lock_class_key lock_key; \
+ static struct lock_class_key request_key; \
+ gpiochip_add_data_with_key(chip, data, &lock_key, \
+ &request_key); \
+ })
+#else
+#define gpiochip_add_data(chip, data) gpiochip_add_data_with_key(chip, data, NULL, NULL)
+#endif
+
+static inline int gpiochip_add(struct gpio_chip *chip)
+{
+ return gpiochip_add_data(chip, NULL);
+}
+extern void gpiochip_remove(struct gpio_chip *chip);
+extern int devm_gpiochip_add_data(struct device *dev, struct gpio_chip *chip,
+ void *data);
+extern void devm_gpiochip_remove(struct device *dev, struct gpio_chip *chip);
+
+extern struct gpio_chip *gpiochip_find(void *data,
+ int (*match)(struct gpio_chip *chip, void *data));
+
+/* lock/unlock as IRQ */
+int gpiochip_lock_as_irq(struct gpio_chip *chip, unsigned int offset);
+void gpiochip_unlock_as_irq(struct gpio_chip *chip, unsigned int offset);
+bool gpiochip_line_is_irq(struct gpio_chip *chip, unsigned int offset);
+
+/* Line status inquiry for drivers */
+bool gpiochip_line_is_open_drain(struct gpio_chip *chip, unsigned int offset);
+bool gpiochip_line_is_open_source(struct gpio_chip *chip, unsigned int offset);
+
+/* Sleep persistence inquiry for drivers */
+bool gpiochip_line_is_persistent(struct gpio_chip *chip, unsigned int offset);
+bool gpiochip_line_is_valid(const struct gpio_chip *chip, unsigned int offset);
+
+/* get driver data */
+void *gpiochip_get_data(struct gpio_chip *chip);
+
+struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc);
+
+struct bgpio_pdata {
+ const char *label;
+ int base;
+ int ngpio;
+};
+
+#if IS_ENABLED(CONFIG_GPIO_GENERIC)
+
+int bgpio_init(struct gpio_chip *gc, struct device *dev,
+ unsigned long sz, void __iomem *dat, void __iomem *set,
+ void __iomem *clr, void __iomem *dirout, void __iomem *dirin,
+ unsigned long flags);
+
+#define BGPIOF_BIG_ENDIAN BIT(0)
+#define BGPIOF_UNREADABLE_REG_SET BIT(1) /* reg_set is unreadable */
+#define BGPIOF_UNREADABLE_REG_DIR BIT(2) /* reg_dir is unreadable */
+#define BGPIOF_BIG_ENDIAN_BYTE_ORDER BIT(3)
+#define BGPIOF_READ_OUTPUT_REG_SET BIT(4) /* reg_set stores output value */
+#define BGPIOF_NO_OUTPUT BIT(5) /* only input */
+
+#endif
+
+#ifdef CONFIG_GPIOLIB_IRQCHIP
+
+int gpiochip_irq_map(struct irq_domain *d, unsigned int irq,
+ irq_hw_number_t hwirq);
+void gpiochip_irq_unmap(struct irq_domain *d, unsigned int irq);
+
+void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip,
+ struct irq_chip *irqchip,
+ unsigned int parent_irq,
+ irq_flow_handler_t parent_handler);
+
+void gpiochip_set_nested_irqchip(struct gpio_chip *gpiochip,
+ struct irq_chip *irqchip,
+ unsigned int parent_irq);
+
+int gpiochip_irqchip_add_key(struct gpio_chip *gpiochip,
+ struct irq_chip *irqchip,
+ unsigned int first_irq,
+ irq_flow_handler_t handler,
+ unsigned int type,
+ bool threaded,
+ struct lock_class_key *lock_key,
+ struct lock_class_key *request_key);
+
+bool gpiochip_irqchip_irq_valid(const struct gpio_chip *gpiochip,
+ unsigned int offset);
+
+#ifdef CONFIG_LOCKDEP
+
+/*
+ * Lockdep requires that each irqchip instance be created with a
+ * unique key so as to avoid unnecessary warnings. This upfront
+ * boilerplate static inlines provides such a key for each
+ * unique instance.
+ */
+static inline int gpiochip_irqchip_add(struct gpio_chip *gpiochip,
+ struct irq_chip *irqchip,
+ unsigned int first_irq,
+ irq_flow_handler_t handler,
+ unsigned int type)
+{
+ static struct lock_class_key lock_key;
+ static struct lock_class_key request_key;
+
+ return gpiochip_irqchip_add_key(gpiochip, irqchip, first_irq,
+ handler, type, false,
+ &lock_key, &request_key);
+}
+
+static inline int gpiochip_irqchip_add_nested(struct gpio_chip *gpiochip,
+ struct irq_chip *irqchip,
+ unsigned int first_irq,
+ irq_flow_handler_t handler,
+ unsigned int type)
+{
+
+ static struct lock_class_key lock_key;
+ static struct lock_class_key request_key;
+
+ return gpiochip_irqchip_add_key(gpiochip, irqchip, first_irq,
+ handler, type, true,
+ &lock_key, &request_key);
+}
+#else
+static inline int gpiochip_irqchip_add(struct gpio_chip *gpiochip,
+ struct irq_chip *irqchip,
+ unsigned int first_irq,
+ irq_flow_handler_t handler,
+ unsigned int type)
+{
+ return gpiochip_irqchip_add_key(gpiochip, irqchip, first_irq,
+ handler, type, false, NULL, NULL);
+}
+
+static inline int gpiochip_irqchip_add_nested(struct gpio_chip *gpiochip,
+ struct irq_chip *irqchip,
+ unsigned int first_irq,
+ irq_flow_handler_t handler,
+ unsigned int type)
+{
+ return gpiochip_irqchip_add_key(gpiochip, irqchip, first_irq,
+ handler, type, true, NULL, NULL);
+}
+#endif /* CONFIG_LOCKDEP */
+
+#endif /* CONFIG_GPIOLIB_IRQCHIP */
+
+int gpiochip_generic_request(struct gpio_chip *chip, unsigned offset);
+void gpiochip_generic_free(struct gpio_chip *chip, unsigned offset);
+int gpiochip_generic_config(struct gpio_chip *chip, unsigned offset,
+ unsigned long config);
+
+#ifdef CONFIG_PINCTRL
+
+/**
+ * struct gpio_pin_range - pin range controlled by a gpio chip
+ * @node: 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);
+
+#else /* CONFIG_GPIOLIB */
+
+static inline struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+ return ERR_PTR(-ENODEV);
+}
+
+#endif /* CONFIG_GPIOLIB */
+
+#endif
diff --git a/include/linux/gpio/gpio-reg.h b/include/linux/gpio/gpio-reg.h
new file mode 100644
index 0000000..5c6efd3
--- /dev/null
+++ b/include/linux/gpio/gpio-reg.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef GPIO_REG_H
+#define GPIO_REG_H
+
+struct device;
+struct irq_domain;
+
+struct gpio_chip *gpio_reg_init(struct device *dev, void __iomem *reg,
+ int base, int num, const char *label, u32 direction, u32 def_out,
+ const char *const *names, struct irq_domain *irqdom, const int *irqs);
+
+int gpio_reg_resume(struct gpio_chip *gc);
+
+#endif
diff --git a/include/linux/gpio/machine.h b/include/linux/gpio/machine.h
new file mode 100644
index 0000000..daa44ea
--- /dev/null
+++ b/include/linux/gpio/machine.h
@@ -0,0 +1,106 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_GPIO_MACHINE_H
+#define __LINUX_GPIO_MACHINE_H
+
+#include <linux/types.h>
+#include <linux/list.h>
+
+enum gpio_lookup_flags {
+ GPIO_ACTIVE_HIGH = (0 << 0),
+ GPIO_ACTIVE_LOW = (1 << 0),
+ GPIO_OPEN_DRAIN = (1 << 1),
+ GPIO_OPEN_SOURCE = (1 << 2),
+ GPIO_PERSISTENT = (0 << 3),
+ GPIO_TRANSITORY = (1 << 3),
+};
+
+/**
+ * struct gpiod_lookup - lookup table
+ * @chip_label: name of the chip the GPIO belongs to
+ * @chip_hwnum: hardware number (i.e. relative to the chip) of the GPIO
+ * @con_id: name of the GPIO from the device's point of view
+ * @idx: index of the GPIO in case several GPIOs share the same name
+ * @flags: mask of GPIO_* values
+ *
+ * gpiod_lookup is a lookup table for associating GPIOs to specific devices and
+ * functions using platform data.
+ */
+struct gpiod_lookup {
+ const char *chip_label;
+ u16 chip_hwnum;
+ const char *con_id;
+ unsigned int idx;
+ enum gpio_lookup_flags flags;
+};
+
+struct gpiod_lookup_table {
+ struct list_head list;
+ const char *dev_id;
+ struct gpiod_lookup table[];
+};
+
+/**
+ * struct gpiod_hog - GPIO line hog table
+ * @chip_label: name of the chip the GPIO belongs to
+ * @chip_hwnum: hardware number (i.e. relative to the chip) of the GPIO
+ * @line_name: consumer name for the hogged line
+ * @lflags: mask of GPIO lookup flags
+ * @dflags: GPIO flags used to specify the direction and value
+ */
+struct gpiod_hog {
+ struct list_head list;
+ const char *chip_label;
+ u16 chip_hwnum;
+ const char *line_name;
+ enum gpio_lookup_flags lflags;
+ int dflags;
+};
+
+/*
+ * Simple definition of a single GPIO under a con_id
+ */
+#define GPIO_LOOKUP(_chip_label, _chip_hwnum, _con_id, _flags) \
+ GPIO_LOOKUP_IDX(_chip_label, _chip_hwnum, _con_id, 0, _flags)
+
+/*
+ * Use this macro if you need to have several GPIOs under the same con_id.
+ * Each GPIO needs to use a different index and can be accessed using
+ * gpiod_get_index()
+ */
+#define GPIO_LOOKUP_IDX(_chip_label, _chip_hwnum, _con_id, _idx, _flags) \
+{ \
+ .chip_label = _chip_label, \
+ .chip_hwnum = _chip_hwnum, \
+ .con_id = _con_id, \
+ .idx = _idx, \
+ .flags = _flags, \
+}
+
+/*
+ * Simple definition of a single GPIO hog in an array.
+ */
+#define GPIO_HOG(_chip_label, _chip_hwnum, _line_name, _lflags, _dflags) \
+{ \
+ .chip_label = _chip_label, \
+ .chip_hwnum = _chip_hwnum, \
+ .line_name = _line_name, \
+ .lflags = _lflags, \
+ .dflags = _dflags, \
+}
+
+#ifdef CONFIG_GPIOLIB
+void gpiod_add_lookup_table(struct gpiod_lookup_table *table);
+void gpiod_add_lookup_tables(struct gpiod_lookup_table **tables, size_t n);
+void gpiod_remove_lookup_table(struct gpiod_lookup_table *table);
+void gpiod_add_hogs(struct gpiod_hog *hogs);
+#else
+static inline
+void gpiod_add_lookup_table(struct gpiod_lookup_table *table) {}
+static inline
+void gpiod_add_lookup_tables(struct gpiod_lookup_table **tables, size_t n) {}
+static inline
+void gpiod_remove_lookup_table(struct gpiod_lookup_table *table) {}
+static inline void gpiod_add_hogs(struct gpiod_hog *hogs) {}
+#endif
+
+#endif /* __LINUX_GPIO_MACHINE_H */