From mboxrd@z Thu Jan 1 00:00:00 1970 From: jjhiblot@traphandler.com (Jean-Jacques Hiblot) Date: Wed, 22 Jan 2014 13:39:00 +0100 Subject: [PATCH 1/2] at91: gpio: use gpiolib API to mark a GPIO used as an IRQ Message-ID: <1390394341-12548-1-git-send-email-jjhiblot@traphandler.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org When an IRQ is started on a GPIO line, mark this GPIO as IRQ in the gpiolib so we can keep track of the usage centrally. Signed-off-by: Jean-Jacques Hiblot --- arch/arm/mach-at91/gpio.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/arch/arm/mach-at91/gpio.c b/arch/arm/mach-at91/gpio.c index a5afcf7..6176b4b 100644 --- a/arch/arm/mach-at91/gpio.c +++ b/arch/arm/mach-at91/gpio.c @@ -577,8 +577,32 @@ static int alt_gpio_irq_type(struct irq_data *d, unsigned type) return 0; } +static unsigned int gpio_irq_startup(struct irq_data *d) +{ + struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d); + unsigned pin = d->hwirq; + int ret; + + ret = gpio_lock_as_irq(&at91_gpio->chip, pin); + if (ret) { + dev_err(at91_gpio->chip.dev, "unable to lock pind %lu IRQ\n", + d->hwirq); + return ret; + } + return 0; +} +static void gpio_irq_shutdown(struct irq_data *d) +{ + struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d); + unsigned pin = d->hwirq; + + gpio_unlock_as_irq(&at91_gpio->chip, pin); +} + static struct irq_chip gpio_irqchip = { .name = "GPIO", + .irq_shutdown = gpio_irq_shutdown, + .irq_startup = gpio_irq_startup, .irq_disable = gpio_irq_mask, .irq_mask = gpio_irq_mask, .irq_unmask = gpio_irq_unmask, -- 1.8.5.2