From c44eafd79be666e7c81d22e215c945b27f2785f7 Mon Sep 17 00:00:00 2001
From: Thierry Reding <treding@nvidia.com>
Date: Tue, 7 Nov 2017 19:15:45 +0100
Subject: [PATCH] gpio: Introduce struct gpio_irq_chip
This new structure will be used to group all fields related to interrupt
handling in a GPIO chip. Doing so will properly namespace these fields
and make it easier to distinguish which fields are used for IRQ support.
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>
---
include/linux/gpio/driver.h | 38 +++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index ed04fa2a00a8..36a065521fa0 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -19,6 +19,36 @@ struct module;
#ifdef CONFIG_GPIOLIB
+#ifdef CONFIG_GPIOLIB_IRQCHIP
+/**
+ * struct gpio_irq_chip - GPIO interrupt controller
+ */
+struct gpio_irq_chip {
+ /**
+ * @domain_ops:
+ *
+ * Table of interrupt domain operations for this IRQ chip.
+ */
+ const struct irq_domain_ops *domain_ops;
+
+ /**
+ * @parent_handler:
+ *
+ * The interrupt handler for the GPIO chip's parent interrupts, may be
+ * NULL if the parent interrupts are nested rather than cascaded.
+ */
+ irq_flow_handler_t parent_handler;
+
+ /**
+ * @parent_handler_data:
+ *
+ * Data associated, and passed to, the handler for the parent
+ * interrupt.
+ */
+ void *parent_handler_data;
+};
+#endif
+
/**
* struct gpio_chip - abstract a GPIO controller
* @label: a functional name for the GPIO device, such as a part
@@ -176,6 +206,14 @@ struct gpio_chip {
bool irq_need_valid_mask;
unsigned long *irq_valid_mask;
struct lock_class_key *lock_key;
+
+ /**
+ * @irq:
+ *
+ * Integrates interrupt chip functionality with the GPIO chip. Can be
+ * used to handle IRQs for most practical cases.
+ */
+ struct gpio_irq_chip irq;
#endif
#if defined(CONFIG_OF_GPIO)
--
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