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-rw-r--r--include/linux/gpio/consumer.h16
-rw-r--r--include/linux/gpio/driver.h161
-rw-r--r--include/linux/gpio/gpio-nomadik.h294
-rw-r--r--include/linux/gpio/property.h4
4 files changed, 410 insertions, 65 deletions
diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h
index 1c4385a00f88..db2dfbae8edb 100644
--- a/include/linux/gpio/consumer.h
+++ b/include/linux/gpio/consumer.h
@@ -159,7 +159,6 @@ int gpiod_set_raw_array_value_cansleep(unsigned int array_size,
int gpiod_set_config(struct gpio_desc *desc, unsigned long config);
int gpiod_set_debounce(struct gpio_desc *desc, unsigned int debounce);
-int gpiod_set_transitory(struct gpio_desc *desc, bool transitory);
void gpiod_toggle_active_low(struct gpio_desc *desc);
int gpiod_is_active_low(const struct gpio_desc *desc);
@@ -494,13 +493,6 @@ static inline int gpiod_set_debounce(struct gpio_desc *desc, unsigned int deboun
return -ENOSYS;
}
-static inline int gpiod_set_transitory(struct gpio_desc *desc, bool transitory)
-{
- /* GPIO can never have been requested */
- WARN_ON(desc);
- return -ENOSYS;
-}
-
static inline void gpiod_toggle_active_low(struct gpio_desc *desc)
{
/* GPIO can never have been requested */
@@ -614,8 +606,6 @@ void acpi_dev_remove_driver_gpios(struct acpi_device *adev);
int devm_acpi_dev_add_driver_gpios(struct device *dev,
const struct acpi_gpio_mapping *gpios);
-struct gpio_desc *acpi_get_and_request_gpiod(char *path, unsigned int pin, char *label);
-
#else /* CONFIG_GPIOLIB && CONFIG_ACPI */
#include <linux/err.h>
@@ -633,12 +623,6 @@ static inline int devm_acpi_dev_add_driver_gpios(struct device *dev,
return -ENXIO;
}
-static inline struct gpio_desc *acpi_get_and_request_gpiod(char *path, unsigned int pin,
- char *label)
-{
- return ERR_PTR(-ENOSYS);
-}
-
#endif /* CONFIG_GPIOLIB && CONFIG_ACPI */
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index d6e38a500833..2dd7cb9cc270 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -3,6 +3,8 @@
#define __LINUX_GPIO_DRIVER_H
#include <linux/bits.h>
+#include <linux/cleanup.h>
+#include <linux/err.h>
#include <linux/irqchip/chained_irq.h>
#include <linux/irqdomain.h>
#include <linux/irqhandler.h>
@@ -333,10 +335,12 @@ struct gpio_irq_chip {
* (same as GPIO_LINE_DIRECTION_OUT / GPIO_LINE_DIRECTION_IN),
* or negative error. It is recommended to always implement this
* function, even on input-only or output-only gpio chips.
- * @direction_input: configures signal "offset" as input, or returns error
- * This can be omitted on input-only or output-only gpio chips.
- * @direction_output: configures signal "offset" as output, or returns error
- * This can be omitted on input-only or output-only gpio chips.
+ * @direction_input: configures signal "offset" as input, returns 0 on success
+ * or a negative error number. This can be omitted on input-only or
+ * output-only gpio chips.
+ * @direction_output: configures signal "offset" as output, returns 0 on
+ * success or a negative error number. This can be omitted on input-only
+ * or output-only gpio chips.
* @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
@@ -372,9 +376,7 @@ struct gpio_irq_chip {
* @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.
+ * array must be @ngpio entries long.
* @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
@@ -529,29 +531,64 @@ struct gpio_chip {
#endif /* CONFIG_OF_GPIO */
};
-extern const char *gpiochip_is_requested(struct gpio_chip *gc,
- unsigned int offset);
+char *gpiochip_dup_line_label(struct gpio_chip *gc, unsigned int offset);
+
+
+struct _gpiochip_for_each_data {
+ const char **label;
+ unsigned int *i;
+};
+
+DEFINE_CLASS(_gpiochip_for_each_data,
+ struct _gpiochip_for_each_data,
+ if (*_T.label) kfree(*_T.label),
+ ({
+ struct _gpiochip_for_each_data _data = { label, i };
+ *_data.i = 0;
+ _data;
+ }),
+ const char **label, int *i)
+
+/**
+ * for_each_hwgpio - Iterates over all GPIOs for given chip.
+ * @_chip: Chip to iterate over.
+ * @_i: Loop counter.
+ * @_label: Place to store the address of the label if the GPIO is requested.
+ * Set to NULL for unused GPIOs.
+ */
+#define for_each_hwgpio(_chip, _i, _label) \
+ for (CLASS(_gpiochip_for_each_data, _data)(&_label, &_i); \
+ *_data.i < _chip->ngpio; \
+ (*_data.i)++, kfree(*(_data.label)), *_data.label = NULL) \
+ if (IS_ERR(*_data.label = \
+ gpiochip_dup_line_label(_chip, *_data.i))) {} \
+ else
/**
* for_each_requested_gpio_in_range - iterates over requested GPIOs in a given range
- * @chip: the chip to query
- * @i: loop variable
- * @base: first GPIO in the range
- * @size: amount of GPIOs to check starting from @base
- * @label: label of current GPIO
+ * @_chip: the chip to query
+ * @_i: loop variable
+ * @_base: first GPIO in the range
+ * @_size: amount of GPIOs to check starting from @base
+ * @_label: label of current GPIO
*/
-#define for_each_requested_gpio_in_range(chip, i, base, size, label) \
- for (i = 0; i < size; i++) \
- if ((label = gpiochip_is_requested(chip, base + i)) == NULL) {} else
+#define for_each_requested_gpio_in_range(_chip, _i, _base, _size, _label) \
+ for (CLASS(_gpiochip_for_each_data, _data)(&_label, &_i); \
+ *_data.i < _size; \
+ (*_data.i)++, kfree(*(_data.label)), *_data.label = NULL) \
+ if ((*_data.label = \
+ gpiochip_dup_line_label(_chip, _base + *_data.i)) == NULL) {} \
+ else if (IS_ERR(*_data.label)) {} \
+ else
/* Iterates over all requested GPIO of the given @chip */
#define for_each_requested_gpio(chip, i, label) \
for_each_requested_gpio_in_range(chip, i, 0, chip->ngpio, label)
/* add/remove chips */
-extern int gpiochip_add_data_with_key(struct gpio_chip *gc, void *data,
- struct lock_class_key *lock_key,
- struct lock_class_key *request_key);
+int gpiochip_add_data_with_key(struct gpio_chip *gc, void *data,
+ struct lock_class_key *lock_key,
+ struct lock_class_key *request_key);
/**
* gpiochip_add_data() - register a gpio_chip
@@ -595,24 +632,23 @@ extern int gpiochip_add_data_with_key(struct gpio_chip *gc, void *data,
devm_gpiochip_add_data_with_key(dev, gc, data, NULL, NULL)
#endif /* CONFIG_LOCKDEP */
-static inline int gpiochip_add(struct gpio_chip *gc)
-{
- return gpiochip_add_data(gc, NULL);
-}
-extern void gpiochip_remove(struct gpio_chip *gc);
-extern int devm_gpiochip_add_data_with_key(struct device *dev, struct gpio_chip *gc, void *data,
- struct lock_class_key *lock_key,
- struct lock_class_key *request_key);
-
-extern struct gpio_chip *gpiochip_find(void *data,
- int (*match)(struct gpio_chip *gc, void *data));
+void gpiochip_remove(struct gpio_chip *gc);
+int devm_gpiochip_add_data_with_key(struct device *dev, struct gpio_chip *gc,
+ void *data, struct lock_class_key *lock_key,
+ struct lock_class_key *request_key);
-struct gpio_device *gpio_device_find(void *data,
- int (*match)(struct gpio_chip *gc, void *data));
+struct gpio_device *gpio_device_find(const void *data,
+ int (*match)(struct gpio_chip *gc,
+ const void *data));
struct gpio_device *gpio_device_get(struct gpio_device *gdev);
void gpio_device_put(struct gpio_device *gdev);
+DEFINE_FREE(gpio_device_put, struct gpio_device *,
+ if (!IS_ERR_OR_NULL(_T)) gpio_device_put(_T))
+
+struct device *gpio_device_to_device(struct gpio_device *gdev);
+
bool gpiochip_line_is_irq(struct gpio_chip *gc, unsigned int offset);
int gpiochip_reqres_irq(struct gpio_chip *gc, unsigned int offset);
void gpiochip_relres_irq(struct gpio_chip *gc, unsigned int offset);
@@ -678,25 +714,12 @@ int bgpio_init(struct gpio_chip *gc, struct device *dev,
#define BGPIOF_NO_OUTPUT BIT(5) /* only input */
#define BGPIOF_NO_SET_ON_INPUT BIT(6)
-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);
-
-int gpiochip_irq_domain_activate(struct irq_domain *domain,
- struct irq_data *data, bool reserve);
-void gpiochip_irq_domain_deactivate(struct irq_domain *domain,
- struct irq_data *data);
-
-bool gpiochip_irqchip_irq_valid(const struct gpio_chip *gc,
- unsigned int offset);
-
#ifdef CONFIG_GPIOLIB_IRQCHIP
int gpiochip_irqchip_add_domain(struct gpio_chip *gc,
struct irq_domain *domain);
#else
#include <asm/bug.h>
-#include <asm/errno.h>
static inline int gpiochip_irqchip_add_domain(struct gpio_chip *gc,
struct irq_domain *domain)
@@ -764,18 +787,28 @@ struct gpio_desc *gpiochip_request_own_desc(struct gpio_chip *gc,
enum gpiod_flags dflags);
void gpiochip_free_own_desc(struct gpio_desc *desc);
+struct gpio_desc *
+gpio_device_get_desc(struct gpio_device *gdev, unsigned int hwnum);
+
+struct gpio_chip *gpio_device_get_chip(struct gpio_device *gdev);
+
#ifdef CONFIG_GPIOLIB
/* lock/unlock as IRQ */
int gpiochip_lock_as_irq(struct gpio_chip *gc, unsigned int offset);
void gpiochip_unlock_as_irq(struct gpio_chip *gc, unsigned int offset);
-
struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc);
+struct gpio_device *gpiod_to_gpio_device(struct gpio_desc *desc);
-#else /* CONFIG_GPIOLIB */
+/* struct gpio_device getters */
+int gpio_device_get_base(struct gpio_device *gdev);
+const char *gpio_device_get_label(struct gpio_device *gdev);
-#include <linux/err.h>
+struct gpio_device *gpio_device_find_by_label(const char *label);
+struct gpio_device *gpio_device_find_by_fwnode(const struct fwnode_handle *fwnode);
+
+#else /* CONFIG_GPIOLIB */
#include <asm/bug.h>
@@ -786,6 +819,36 @@ static inline struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc)
return ERR_PTR(-ENODEV);
}
+static inline struct gpio_device *gpiod_to_gpio_device(struct gpio_desc *desc)
+{
+ WARN_ON(1);
+ return ERR_PTR(-ENODEV);
+}
+
+static inline int gpio_device_get_base(struct gpio_device *gdev)
+{
+ WARN_ON(1);
+ return -ENODEV;
+}
+
+static inline const char *gpio_device_get_label(struct gpio_device *gdev)
+{
+ WARN_ON(1);
+ return NULL;
+}
+
+static inline struct gpio_device *gpio_device_find_by_label(const char *label)
+{
+ WARN_ON(1);
+ return NULL;
+}
+
+static inline struct gpio_device *gpio_device_find_by_fwnode(const struct fwnode_handle *fwnode)
+{
+ WARN_ON(1);
+ return NULL;
+}
+
static inline int gpiochip_lock_as_irq(struct gpio_chip *gc,
unsigned int offset)
{
diff --git a/include/linux/gpio/gpio-nomadik.h b/include/linux/gpio/gpio-nomadik.h
new file mode 100644
index 000000000000..b5a84864650d
--- /dev/null
+++ b/include/linux/gpio/gpio-nomadik.h
@@ -0,0 +1,294 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_GPIO_NOMADIK_H
+#define __LINUX_GPIO_NOMADIK_H
+
+struct fwnode_handle;
+
+/* Package definitions */
+#define PINCTRL_NMK_STN8815 0
+#define PINCTRL_NMK_DB8500 1
+
+#define GPIO_BLOCK_SHIFT 5
+#define NMK_GPIO_PER_CHIP BIT(GPIO_BLOCK_SHIFT)
+#define NMK_MAX_BANKS DIV_ROUND_UP(512, NMK_GPIO_PER_CHIP)
+
+/* Register in the logic block */
+#define NMK_GPIO_DAT 0x00
+#define NMK_GPIO_DATS 0x04
+#define NMK_GPIO_DATC 0x08
+#define NMK_GPIO_PDIS 0x0c
+#define NMK_GPIO_DIR 0x10
+#define NMK_GPIO_DIRS 0x14
+#define NMK_GPIO_DIRC 0x18
+#define NMK_GPIO_SLPC 0x1c
+#define NMK_GPIO_AFSLA 0x20
+#define NMK_GPIO_AFSLB 0x24
+#define NMK_GPIO_LOWEMI 0x28
+
+#define NMK_GPIO_RIMSC 0x40
+#define NMK_GPIO_FIMSC 0x44
+#define NMK_GPIO_IS 0x48
+#define NMK_GPIO_IC 0x4c
+#define NMK_GPIO_RWIMSC 0x50
+#define NMK_GPIO_FWIMSC 0x54
+#define NMK_GPIO_WKS 0x58
+/* These appear in DB8540 and later ASICs */
+#define NMK_GPIO_EDGELEVEL 0x5C
+#define NMK_GPIO_LEVEL 0x60
+
+/* Pull up/down values */
+enum nmk_gpio_pull {
+ NMK_GPIO_PULL_NONE,
+ NMK_GPIO_PULL_UP,
+ NMK_GPIO_PULL_DOWN,
+};
+
+/* Sleep mode */
+enum nmk_gpio_slpm {
+ NMK_GPIO_SLPM_INPUT,
+ NMK_GPIO_SLPM_WAKEUP_ENABLE = NMK_GPIO_SLPM_INPUT,
+ NMK_GPIO_SLPM_NOCHANGE,
+ NMK_GPIO_SLPM_WAKEUP_DISABLE = NMK_GPIO_SLPM_NOCHANGE,
+};
+
+struct nmk_gpio_chip {
+ struct gpio_chip chip;
+ void __iomem *addr;
+ struct clk *clk;
+ unsigned int bank;
+ void (*set_ioforce)(bool enable);
+ spinlock_t lock;
+ bool sleepmode;
+ bool is_mobileye_soc;
+ /* Keep track of configured edges */
+ u32 edge_rising;
+ u32 edge_falling;
+ u32 real_wake;
+ u32 rwimsc;
+ u32 fwimsc;
+ u32 rimsc;
+ u32 fimsc;
+ u32 pull_up;
+ u32 lowemi;
+};
+
+/* Alternate functions: function C is set in hw by setting both A and B */
+#define NMK_GPIO_ALT_GPIO 0
+#define NMK_GPIO_ALT_A 1
+#define NMK_GPIO_ALT_B 2
+#define NMK_GPIO_ALT_C (NMK_GPIO_ALT_A | NMK_GPIO_ALT_B)
+
+#define NMK_GPIO_ALT_CX_SHIFT 2
+#define NMK_GPIO_ALT_C1 ((1<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C)
+#define NMK_GPIO_ALT_C2 ((2<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C)
+#define NMK_GPIO_ALT_C3 ((3<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C)
+#define NMK_GPIO_ALT_C4 ((4<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C)
+
+#define PRCM_GPIOCR_ALTCX(pin_num,\
+ altc1_used, altc1_ri, altc1_cb,\
+ altc2_used, altc2_ri, altc2_cb,\
+ altc3_used, altc3_ri, altc3_cb,\
+ altc4_used, altc4_ri, altc4_cb)\
+{\
+ .pin = pin_num,\
+ .altcx[PRCM_IDX_GPIOCR_ALTC1] = {\
+ .used = altc1_used,\
+ .reg_index = altc1_ri,\
+ .control_bit = altc1_cb\
+ },\
+ .altcx[PRCM_IDX_GPIOCR_ALTC2] = {\
+ .used = altc2_used,\
+ .reg_index = altc2_ri,\
+ .control_bit = altc2_cb\
+ },\
+ .altcx[PRCM_IDX_GPIOCR_ALTC3] = {\
+ .used = altc3_used,\
+ .reg_index = altc3_ri,\
+ .control_bit = altc3_cb\
+ },\
+ .altcx[PRCM_IDX_GPIOCR_ALTC4] = {\
+ .used = altc4_used,\
+ .reg_index = altc4_ri,\
+ .control_bit = altc4_cb\
+ },\
+}
+
+/**
+ * enum prcm_gpiocr_reg_index
+ * Used to reference an PRCM GPIOCR register address.
+ */
+enum prcm_gpiocr_reg_index {
+ PRCM_IDX_GPIOCR1,
+ PRCM_IDX_GPIOCR2,
+ PRCM_IDX_GPIOCR3
+};
+/**
+ * enum prcm_gpiocr_altcx_index
+ * Used to reference an Other alternate-C function.
+ */
+enum prcm_gpiocr_altcx_index {
+ PRCM_IDX_GPIOCR_ALTC1,
+ PRCM_IDX_GPIOCR_ALTC2,
+ PRCM_IDX_GPIOCR_ALTC3,
+ PRCM_IDX_GPIOCR_ALTC4,
+ PRCM_IDX_GPIOCR_ALTC_MAX,
+};
+
+/**
+ * struct prcm_gpio_altcx - Other alternate-C function
+ * @used: other alternate-C function availability
+ * @reg_index: PRCM GPIOCR register index used to control the function
+ * @control_bit: PRCM GPIOCR bit used to control the function
+ */
+struct prcm_gpiocr_altcx {
+ bool used:1;
+ u8 reg_index:2;
+ u8 control_bit:5;
+} __packed;
+
+/**
+ * struct prcm_gpio_altcx_pin_desc - Other alternate-C pin
+ * @pin: The pin number
+ * @altcx: array of other alternate-C[1-4] functions
+ */
+struct prcm_gpiocr_altcx_pin_desc {
+ unsigned short pin;
+ struct prcm_gpiocr_altcx altcx[PRCM_IDX_GPIOCR_ALTC_MAX];
+};
+
+/**
+ * struct nmk_function - Nomadik pinctrl mux function
+ * @name: The name of the function, exported to pinctrl core.
+ * @groups: An array of pin groups that may select this function.
+ * @ngroups: The number of entries in @groups.
+ */
+struct nmk_function {
+ const char *name;
+ const char * const *groups;
+ unsigned int ngroups;
+};
+
+/**
+ * struct nmk_pingroup - describes a Nomadik pin group
+ * @grp: Generic data of the pin group (name and pins)
+ * @altsetting: the altsetting to apply to all pins in this group to
+ * configure them to be used by a function
+ */
+struct nmk_pingroup {
+ struct pingroup grp;
+ int altsetting;
+};
+
+#define NMK_PIN_GROUP(a, b) \
+ { \
+ .grp = PINCTRL_PINGROUP(#a, a##_pins, ARRAY_SIZE(a##_pins)), \
+ .altsetting = b, \
+ }
+
+/**
+ * struct nmk_pinctrl_soc_data - Nomadik pin controller per-SoC configuration
+ * @pins: An array describing all pins the pin controller affects.
+ * All pins which are also GPIOs must be listed first within the
+ * array, and be numbered identically to the GPIO controller's
+ * numbering.
+ * @npins: The number of entries in @pins.
+ * @functions: The functions supported on this SoC.
+ * @nfunction: The number of entries in @functions.
+ * @groups: An array describing all pin groups the pin SoC supports.
+ * @ngroups: The number of entries in @groups.
+ * @altcx_pins: The pins that support Other alternate-C function on this SoC
+ * @npins_altcx: The number of Other alternate-C pins
+ * @prcm_gpiocr_registers: The array of PRCM GPIOCR registers on this SoC
+ */
+struct nmk_pinctrl_soc_data {
+ const struct pinctrl_pin_desc *pins;
+ unsigned int npins;
+ const struct nmk_function *functions;
+ unsigned int nfunctions;
+ const struct nmk_pingroup *groups;
+ unsigned int ngroups;
+ const struct prcm_gpiocr_altcx_pin_desc *altcx_pins;
+ unsigned int npins_altcx;
+ const u16 *prcm_gpiocr_registers;
+};
+
+#ifdef CONFIG_PINCTRL_STN8815
+
+void nmk_pinctrl_stn8815_init(const struct nmk_pinctrl_soc_data **soc);
+
+#else
+
+static inline void
+nmk_pinctrl_stn8815_init(const struct nmk_pinctrl_soc_data **soc)
+{
+}
+
+#endif
+
+#ifdef CONFIG_PINCTRL_DB8500
+
+void nmk_pinctrl_db8500_init(const struct nmk_pinctrl_soc_data **soc);
+
+#else
+
+static inline void
+nmk_pinctrl_db8500_init(const struct nmk_pinctrl_soc_data **soc)
+{
+}
+
+#endif
+
+#ifdef CONFIG_PINCTRL_DB8540
+
+void nmk_pinctrl_db8540_init(const struct nmk_pinctrl_soc_data **soc);
+
+#else
+
+static inline void
+nmk_pinctrl_db8540_init(const struct nmk_pinctrl_soc_data **soc)
+{
+}
+
+#endif
+
+struct platform_device;
+
+#ifdef CONFIG_DEBUG_FS
+
+/*
+ * Symbols declared in gpio-nomadik used by pinctrl-nomadik. If pinctrl-nomadik
+ * is enabled, then gpio-nomadik is enabled as well; the reverse if not always
+ * true.
+ */
+void nmk_gpio_dbg_show_one(struct seq_file *s, struct pinctrl_dev *pctldev,
+ struct gpio_chip *chip, unsigned int offset,
+ unsigned int gpio);
+
+#else
+
+static inline void nmk_gpio_dbg_show_one(struct seq_file *s,
+ struct pinctrl_dev *pctldev,
+ struct gpio_chip *chip,
+ unsigned int offset,
+ unsigned int gpio)
+{
+}
+
+#endif
+
+void __nmk_gpio_make_output(struct nmk_gpio_chip *nmk_chip,
+ unsigned int offset, int val);
+void __nmk_gpio_set_slpm(struct nmk_gpio_chip *nmk_chip, unsigned int offset,
+ enum nmk_gpio_slpm mode);
+struct nmk_gpio_chip *nmk_gpio_populate_chip(struct fwnode_handle *fwnode,
+ struct platform_device *pdev);
+
+/* Symbols declared in pinctrl-nomadik used by gpio-nomadik. */
+#ifdef CONFIG_PINCTRL_NOMADIK
+extern struct nmk_gpio_chip *nmk_gpio_chips[NMK_MAX_BANKS];
+extern spinlock_t nmk_gpio_slpm_lock;
+int __maybe_unused nmk_prcm_gpiocr_get_mode(struct pinctrl_dev *pctldev,
+ int gpio);
+#endif
+
+#endif /* __LINUX_GPIO_NOMADIK_H */
diff --git a/include/linux/gpio/property.h b/include/linux/gpio/property.h
index 1a14e239221f..0d2209308002 100644
--- a/include/linux/gpio/property.h
+++ b/include/linux/gpio/property.h
@@ -4,7 +4,11 @@
#include <linux/property.h>
+struct software_node;
+
#define PROPERTY_ENTRY_GPIO(_name_, _chip_node_, _idx_, _flags_) \
PROPERTY_ENTRY_REF(_name_, _chip_node_, _idx_, _flags_)
+extern const struct software_node swnode_gpio_undefined;
+
#endif /* __LINUX_GPIO_PROPERTY_H */
generated by cgit v1.2.3 (git 2.39.0) at 2025-07-14 02:15:46 +0300