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From: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Date: Fri, 14 Feb 2025 12:49:54 +0100
Subject: [PATCH v4 04/10] gpio: regmap: Allow to provide request and free
callbacks
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Allows to populate the gpio_regmap_config structure with request() and
free() callbacks to set on the final gpio_chip structure.
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
---
drivers/gpio/gpio-regmap.c | 2 ++
include/linux/gpio/regmap.h | 7 +++++++
2 files changed, 9 insertions(+)
diff --git a/drivers/gpio/gpio-regmap.c b/drivers/gpio/gpio-regmap.c
index 05f8781b5204..ba72c23bcf97 100644
--- a/drivers/gpio/gpio-regmap.c
+++ b/drivers/gpio/gpio-regmap.c
@@ -261,6 +261,8 @@ struct gpio_regmap *gpio_regmap_register(const struct g=
pio_regmap_config *config
chip->names =3D config->names;
chip->label =3D config->label ?: dev_name(config->parent);
chip->can_sleep =3D regmap_might_sleep(config->regmap);
+ chip->request =3D config->request;
+ chip->free =3D config->free;
=20
chip->request =3D gpiochip_generic_request;
chip->free =3D gpiochip_generic_free;
diff --git a/include/linux/gpio/regmap.h b/include/linux/gpio/regmap.h
index a9f7b7faf57b..16f0c33df75d 100644
--- a/include/linux/gpio/regmap.h
+++ b/include/linux/gpio/regmap.h
@@ -6,6 +6,7 @@
struct device;
struct fwnode_handle;
struct gpio_regmap;
+struct gpio_chip;
struct irq_domain;
struct regmap;
=20
@@ -40,6 +41,10 @@ struct regmap;
* @drvdata: (Optional) Pointer to driver specific data which is
* not used by gpio-remap but is provided "as is" to the
* driver callback(s).
+ * @request: (Optional) Hook for chip-specific activation, such as
+ * enabling module power and clock
+ * @free: (Optional) Hook for chip-specific deactivation, such as
+ * disabling module power and clock
*
* The ->reg_mask_xlate translates a given base address and GPIO offset to
* register and mask pair. The base address is one of the given register
@@ -83,6 +88,8 @@ struct gpio_regmap_config {
unsigned int *mask);
=20
void *drvdata;
+ int (*request)(struct gpio_chip *gc, unsigned int offset);
+ void (*free)(struct gpio_chip *gc, unsigned int offset);
};
=20
struct gpio_regmap *gpio_regmap_register(const struct gpio_regmap_config *=
config);
--=20
2.39.5