Re: [PATCH 2/2] ARM: dts: sun8i: enable UART1 for iNet D978 Rev2 board

Hi,

On Thu, Aug 25, 2016 at 02:57:24PM +0800, Icenowy Zheng wrote:

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  diff --git a/arch/arm/boot/dts/sun8i-a33-inet-d978-rev2.dts b/arch/arm/boot/dts/sun8i-a33-inet-d978-rev2.dts
  index 78823d8..3ac22d4 100644
  --- a/arch/arm/boot/dts/sun8i-a33-inet-d978-rev2.dts
  +++ b/arch/arm/boot/dts/sun8i-a33-inet-d978-rev2.dts
  @@ -48,6 +48,10 @@
           model = "INet-D978 Rev 02";
           compatible = "primux,inet-d978-rev2", "allwinner,sun8i-a33";

  + aliases {
  + serial1 = &uart1;
  + };
  +

 Is there any other UART in the system?

 serial0 is defined in sun8i-reference-design-tablet.dtsi, as r_uart.

If your board does not have r_uart pads, then the right thing to do
would be to disable it. You can then have uart1 as serial0.

I don't know it. The RX/TX is wired on PF2/PF4 on the board (UART0 muxed with
MMC)

Then you don't support it and you need to disable it.

But many codes will require a ttyS0 as console... So I think the
bluetooth should be located at ttyS1...

Most of them would use /dev/console anyway. What do you have in mind?

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com