[PATCH] gpio/mxc: make it work with imx6q
From: Jamie Iles <hidden>
Date: 2011-09-20 13:05:15
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Hi Shawn, On Mon, Sep 19, 2011 at 05:10:32PM +0800, Shawn Guo wrote:
quoted hunk ↗ jump to hunk
The imx6q is a Cortex-A9 Quad Core SoC, which has GIC as the primary interrupt controller. GIC requires gpio irq handler to signal EOI, otherwise system will hang whenever there is a gpio irq triggered. Signed-off-by: Shawn Guo <redacted> --- drivers/gpio/gpio-mxc.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-)diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c index 4340aca..00b4c9c 100644 --- a/drivers/gpio/gpio-mxc.c +++ b/drivers/gpio/gpio-mxc.c@@ -233,6 +233,9 @@ static void mx3_gpio_irq_handler(u32 irq, struct irq_desc *desc) u32 irq_stat; struct mxc_gpio_port *port = irq_get_handler_data(irq); + if (desc->irq_data.chip->irq_eoi) + desc->irq_data.chip->irq_eoi(&desc->irq_data); + irq_stat = readl(port->base + GPIO_ISR) & readl(port->base + GPIO_IMR); mxc_gpio_irq_handler(port, irq_stat);-- 1.7.4.1
Could this make use of the chained_irq_enter/chained_irq_exit functions added in 10a8c38 (ARM: 6806/1: irq: introduce entry and exit functions for chained handlers)? Jamie