On Fri, Jun 5, 2015 at 7:50 PM, Arnd Bergmann <arnd@xxxxxxxx> wrote:
> On Thursday 04 June 2015 14:25:12 Y Vo wrote:
>> GIC is designed to support two of trigger mechanisms - active level
>> high or edge rising. But in the gpio_keys driver, it tries to use both
>> edge rising and edge falling trigger. This patch fixes the gpio_keys
>> driver to request only the edge rising event when failed to configure the
>> interrupt.
>>
>> Signed-off-by: Y Vo <yvo@xxxxxxx>
>
> I think you want to use an 'interrupts' property instead of a 'gpios'
> property (or possibly both), so you can pass the right polarity.
gpio-keys {
compatible = "gpio-keys";
apm_ctrl_name = "Power Button";
btn2 {
label = "EXT_INT2";
gpios = <&sbgpio 13 0x0>;
linux,code = <116>;
linux,input-type = <0x1>; /* EV_KEY */
};
};
sbgpio: sbgpio@17001000{
compatible = "apm,xgene-gpio-sb";
reg = <0x0 0x17001000 0x0 0x400>;
#gpio-cells = <2>;
gpio-controller;
interrupts = <0x0 0x28 0x1>,
<0x0 0x29 0x1>,
<0x0 0x2a 0x1>,
<0x0 0x2b 0x1>,
<0x0 0x2c 0x1>,
<0x0 0x2d 0x1>;
};
I can change the polarity of interrupt in the sbgpio node, but the
issue here is the gpio_key driver always set interrupt type to
(irqflags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING). And the GIC
driver only support edge rising or level high. So that's our issue.
>
> Arnd
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