Hi Andy,
  I suggest this question go to linux arm kernel mailing list.

On 10/09/2014 08:24 PM, Andy Pont wrote:
This isn't strictly a U-Boot issue but I am hoping that there are
appropriately knowledgeable people here who will be able to help!

I am working on a Linux driver for an I2C RTC device and need to add the
correct definitions into the device tree for the SAMA5D31 to be passed to
the kernel at boot time.  I have added:

i2c0: i2c@f0014000 {
         status = "okay";

         rv8523c3@68 {
                 compatible = "mc,rv8523c3";
                 reg = <0x68>;
         };
};

This sets up enough to allow the basic clock functions within the RTC to
work correctly and the hwclock command within Busybox to work correctly.  I
need to add in the definitions for a GPIO (PE31) to be used as the alarm
interrupt pin and can't get my head around the definitions needed within the
device tree.  I have tried adding the following

interrupt-parent = <&pioE>;
interrupts = <31>;

When the RTC driver is loaded by Linux the client->irq variable in the probe
function doesn't contain a value > 0 and so doesn't setup an interrupt.

Any ideas on the correct definitions needed?

Please take this file <arch/arm/boot/dts/sama5d3xdm.dtsi> as a reference, qt1070 use GPIO PIOE 31 as interrupt. it conflict with your setting.

Thanks (and apologies for the noise),

Andy.

Best Regards,
Bo Shen

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