From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thierry Reding Subject: [PATCH v6 01/12] gpio: Introduce struct gpio_irq_chip Date: Thu, 2 Nov 2017 18:49:30 +0100 Message-ID: <20171102174941.3461-2-thierry.reding@gmail.com> References: <20171102174941.3461-1-thierry.reding@gmail.com> Return-path: In-Reply-To: <20171102174941.3461-1-thierry.reding@gmail.com> Sender: linux-kernel-owner@vger.kernel.org To: Linus Walleij Cc: Grygorii Strashko , Jonathan Hunter , linux-gpio@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: linux-tegra@vger.kernel.org From: Thierry Reding 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 --- 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) -- 2.14.1