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gpio: Move irq_chained_parent to struct gpio_irq_chip 

In order to consolidate the multiple ways to associate an IRQ chip with
a GPIO chip, move more fields into the new struct gpio_irq_chip.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Thierry Reding 2017-11-07 19:15:50 +01:00 committed by Linus Walleij
parent 3634eeb0fe
commit 39e5f09695
2 changed files with 27 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/gpio/gpiolib.c
View File

@ -1570,7 +1570,8 @@ static void gpiochip_set_cascaded_irqchip(struct gpio_chip *gpiochip,
irq_set_chained_handler_and_data(parent_irq, parent_handler,
gpiochip);
gpiochip->irq_chained_parent = parent_irq;
gpiochip->irq.parents = &parent_irq;
gpiochip->irq.num_parents = 1;
}
/* Set the parent IRQ for all affected IRQs */
@ -1719,17 +1720,23 @@ static int gpiochip_to_irq(struct gpio_chip *chip, unsigned offset)
*/
static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip)
{
unsigned int offset, irq;
unsigned int offset;
acpi_gpiochip_free_interrupts(gpiochip);
if (gpiochip->irq_chained_parent) {
irq_set_chained_handler_and_data(
gpiochip->irq_chained_parent, NULL, NULL);
if (gpiochip->irq.num_parents > 0) {
struct gpio_irq_chip *irq = &gpiochip->irq;
unsigned int i;
for (i = 0; i < irq->num_parents; i++)
irq_set_chained_handler_and_data(irq->parents[i],
NULL, NULL);
}
/* Remove all IRQ mappings and delete the domain */
if (gpiochip->irq.domain) {
unsigned int irq;
for (offset = 0; offset < gpiochip->ngpio; offset++) {
if (!gpiochip_irqchip_irq_valid(gpiochip, offset))
continue;

19
include/linux/gpio/driver.h
View File

@ -77,6 +77,21 @@ struct gpio_irq_chip {
* interrupt.
*/
void *parent_handler_data;
/**
* @num_parents:
*
* The number of interrupt parents of a GPIO chip.
*/
unsigned int num_parents;
/**
* @parents:
*
* A list of interrupt parents of a GPIO chip. This is owned by the
* driver, so the core will only reference this list, not modify it.
*/
unsigned int *parents;
};
static inline struct gpio_irq_chip *to_gpio_irq_chip(struct irq_chip *chip)
@ -148,9 +163,6 @@ static inline struct gpio_irq_chip *to_gpio_irq_chip(struct irq_chip *chip)
* safely.
* @bgpio_dir: shadowed direction register for generic GPIO to clear/set
* direction safely.
* @irq_chained_parent: GPIO IRQ chip parent/bank linux irq number,
* provided by GPIO driver for chained interrupt (not for nested
* interrupts).
* @irq_nested: True if set the interrupt handling is nested.
* @irq_need_valid_mask: If set core allocates @irq_valid_mask with all
* bits set to one
@ -226,7 +238,6 @@ struct gpio_chip {
* With CONFIG_GPIOLIB_IRQCHIP we get an irqchip inside the gpiolib
* to handle IRQs for most practical cases.
*/
unsigned int irq_chained_parent;
bool irq_nested;
bool irq_need_valid_mask;
unsigned long *irq_valid_mask;