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gpio: Expose the gpiochip_irq_re[ql]res helpers 

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2071835
Tested: This is one of a series of patch sets to enable Arm SystemReady IR
 support in the kernel for NXP i.MX8 platforms.  This set updates GPIO
 support.  It has been tested via simple boot tests and by using the
 kernel GPIO tools to verify pins are being identified and can be used.

commit 704f08753b6dcd0e08c1953af0b2c7f3fac87111
Author: Marc Zyngier <maz@kernel.org>
Date:   Tue Apr 19 15:18:38 2022 +0100

    gpio: Expose the gpiochip_irq_re[ql]res helpers

    The GPIO subsystem has a couple of internal helpers to manage
    resources on behalf of the irqchip. Expose them so that GPIO
    drivers can use them directly.

    Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
    Reviewed-by: Bartosz Golaszewski <brgl@bgdev.pl>
    Signed-off-by: Marc Zyngier <maz@kernel.org>
    Link: https://lore.kernel.org/r/20220419141846.598305-3-maz@kernel.org
    (cherry picked from commit 704f08753b6dcd0e08c1953af0b2c7f3fac87111)

Signed-off-by: Al Stone <ahs3@redhat.com>
This commit is contained in:
Al Stone 2022-08-24 13:28:49 -06:00
parent 4dade4d93e
commit 268b611f51
2 changed files with 8 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/gpio/gpiolib.c
View File

@ -1427,19 +1427,21 @@ static int gpiochip_to_irq(struct gpio_chip *gc, unsigned int offset)
return irq_create_mapping(domain, offset);
}
static int gpiochip_irq_reqres(struct irq_data *d)
int gpiochip_irq_reqres(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
return gpiochip_reqres_irq(gc, d->hwirq);
}
EXPORT_SYMBOL(gpiochip_irq_reqres);
static void gpiochip_irq_relres(struct irq_data *d)
void gpiochip_irq_relres(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
gpiochip_relres_irq(gc, d->hwirq);
}
EXPORT_SYMBOL(gpiochip_irq_relres);
static void gpiochip_irq_mask(struct irq_data *d)
{

4
include/linux/gpio/driver.h
View File

@ -589,6 +589,10 @@ void gpiochip_relres_irq(struct gpio_chip *gc, unsigned int offset);
void gpiochip_disable_irq(struct gpio_chip *gc, unsigned int offset);
void gpiochip_enable_irq(struct gpio_chip *gc, unsigned int offset);
/* irq_data versions of the above */
int gpiochip_irq_reqres(struct irq_data *data);
void gpiochip_irq_relres(struct irq_data *data);
/* 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);