Re: [PATCH 2/2] ARM: dts: sun8i: enable UART1 for iNet D978 Rev2 board
From: Icenowy Zheng <hidden>
Date: 2016-08-25 14:12:35
Also in:
linux-arm-kernel
25.08.2016, 16:03, "Maxime Ripard" [off-list ref]:
Hi, On Thu, Aug 25, 2016 at 02:57:24PM +0800, Icenowy Zheng wrote:quoted
>>>> 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.quoted
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?
As a general configuration, /dev/ttyS0 will be indicated as the default console= value... (Otherwise more boards will fail) Or maybe we can specify uart0 as serial0, and leave it as disabled? (Thus if the debug port is needed, we can easily apply a overlay with &mmc0 status as disabled, and &uart0 status as okay) On all my A33 boards, the official boot0, u-boot all uses uart0 as debugging port.
Maxime -- Maxime Ripard, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com
_______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel