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Merge branch irq/gpio-immutable into irq/irqchip-next

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* irq/gpio-immutable:
  : .
  : First try at preventing the GPIO subsystem from abusing irq_chip
  : data structures. The general idea is to have an irq_chip flag
  : to tell the GPIO subsystem that these structures are immutable,
  : and to convert drivers one by one.
  : .
  Documentation: Update the recommended pattern for GPIO irqchips
  gpio: Update TODO to mention immutable irq_chip structures
  pinctrl: amd: Make the irqchip immutable
  pinctrl: msmgpio: Make the irqchip immutable
  pinctrl: apple-gpio: Make the irqchip immutable
  gpio: pl061: Make the irqchip immutable
  gpio: tegra186: Make the irqchip immutable
  gpio: Add helpers to ease the transition towards immutable irq_chip
  gpio: Expose the gpiochip_irq_re[ql]res helpers
  gpio: Don't fiddle with irqchips marked as immutable

Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Marc Zyngier
2022-04-19 15:23:14 +01:00
parent b2d229d4dd 5644b66a9c
commit 4bde53ab33
11 changed files with 293 additions and 90 deletions
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16
include/linux/gpio/driver.h
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@@ -588,6 +588,22 @@ 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);
/* 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);