This is a note to let you know that I've just added the patch titled
gpio: Add helpers to ease the transition towards immutable irq_chip
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
gpio-add-helpers-to-ease-the-transition-towards-immu.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 648511402a487ae3bc6b1ddcb752a4c959ee7db4
Author: Marc Zyngier <maz@xxxxxxxxxx>
Date: Tue Apr 19 15:18:39 2022 +0100
gpio: Add helpers to ease the transition towards immutable irq_chip
[ Upstream commit 36b78aae4bfee749bbde73be570796bfd0f56bec ]
Add a couple of new helpers to make it slightly simpler to convert
drivers to immutable irq_chip structures:
- GPIOCHIP_IRQ_RESOURCE_HELPERS populates the irq_chip structure
with the resource management callbacks
- gpio_irq_chip_set_chip() populates the gpio_irq_chip.chip
structure, avoiding the proliferation of ugly casts
Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
Reviewed-by: Bartosz Golaszewski <brgl@xxxxxxxx>
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220419141846.598305-4-maz@xxxxxxxxxx
Stable-dep-of: dc3115e6c5d9 ("hid: cp2112: Fix IRQ shutdown stopping polling for all IRQs on chip")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index b241fc23ff3a2..91f60d1e3eb31 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -599,6 +599,18 @@ void gpiochip_enable_irq(struct gpio_chip *gc, unsigned int offset);
int gpiochip_irq_reqres(struct irq_data *data);
void gpiochip_irq_relres(struct irq_data *data);
+/* Paste this in your irq_chip structure */
+#define GPIOCHIP_IRQ_RESOURCE_HELPERS \
+ .irq_request_resources = gpiochip_irq_reqres, \
+ .irq_release_resources = gpiochip_irq_relres
+
+static inline void gpio_irq_chip_set_chip(struct gpio_irq_chip *girq,
+ const struct irq_chip *chip)
+{
+ /* Yes, dropping const is ugly, but it isn't like we have a choice */
+ girq->chip = (struct irq_chip *)chip;
+}
+
/* Line status inquiry for drivers */
bool gpiochip_line_is_open_drain(struct gpio_chip *gc, unsigned int offset);
bool gpiochip_line_is_open_source(struct gpio_chip *gc, unsigned int offset);
