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