This is needed for properly registering GPIO regmap as a child of a regmap
pin controller.
Signed-off-by: Álvaro Fernández Rojas <noltari@xxxxxxxxx>
Reviewed-by: Michael Walle <michael@xxxxxxxx>
Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
---
v9: guard of_node assignment with CONFIG_OF_GPIO
v8: no changes
v7: add gpio-regmap.c comment
v6: add comment and simplify of_node assignment
v5: switch to fwnode
v4: fix documentation
v3: introduce patch needed for properly parsing gpio-range
drivers/gpio/gpio-regmap.c | 5 +++++
include/linux/gpio/regmap.h | 4 ++++
2 files changed, 9 insertions(+)
diff --git a/drivers/gpio/gpio-regmap.c b/drivers/gpio/gpio-regmap.c
index 5412cb3b0b2a..134cedf151a7 100644
--- a/drivers/gpio/gpio-regmap.c
+++ b/drivers/gpio/gpio-regmap.c
@@ -254,6 +254,11 @@ struct gpio_regmap *gpio_regmap_register(const struct gpio_regmap_config *config
chip->names = config->names;
chip->label = config->label ?: dev_name(config->parent);
+#if defined(CONFIG_OF_GPIO)
+ /* gpiolib will use of_node of the parent if chip->of_node is NULL */
+ chip->of_node = to_of_node(config->fwnode);
+#endif /* CONFIG_OF_GPIO */
+
/*
* If our regmap is fast_io we should probably set can_sleep to false.
* Right now, the regmap doesn't save this property, nor is there any
diff --git a/include/linux/gpio/regmap.h b/include/linux/gpio/regmap.h
index ad76f3d0a6ba..334dd928042b 100644
--- a/include/linux/gpio/regmap.h
+++ b/include/linux/gpio/regmap.h
@@ -4,6 +4,7 @@
#define _LINUX_GPIO_REGMAP_H
struct device;
+struct fwnode_handle;
struct gpio_regmap;
struct irq_domain;
struct regmap;
@@ -16,6 +17,8 @@ struct regmap;
* @parent: The parent device
* @regmap: The regmap used to access the registers
* given, the name of the device is used
+ * @fwnode: (Optional) The firmware node.
+ * If not given, the fwnode of the parent is used.
* @label: (Optional) Descriptive name for GPIO controller.
* If not given, the name of the device is used.
* @ngpio: Number of GPIOs
@@ -57,6 +60,7 @@ struct regmap;
struct gpio_regmap_config {
struct device *parent;
struct regmap *regmap;
+ struct fwnode_handle *fwnode;
const char *label;
int ngpio;
--
2.20.1
