linux-kernel - Re: [PATCH v2 2/2] imx53.dtsi : Add DMA configuration for UART

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Date:	Thu, 04 Aug 2016 13:49:10 +0300
From:	Alexander Shiyan <shc_work@...l.ru>
To:	Fabien Lahoudere 
	<fabien.lahoudere@...labora.co.uk>
Cc:	Mark Rutland <mark.rutland@....com>,
	open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS <devicetree@...r.kernel.org>,
	Russell King <linux@...linux.org.uk>,
	open list <linux-kernel@...r.kernel.org>,
	Rob Herring <robh+dt@...nel.org>,
	Sascha Hauer <kernel@...gutronix.de>,
	Fabio Estevam <fabio.estevam@....com>,
	Shawn Guo <shawnguo@...nel.org>,
	moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 2/2] imx53.dtsi : Add DMA configuration for UART

>Четверг,  4 августа 2016, 13:22 +03:00 от Fabien Lahoudere <fabien.lahoudere@...labora.co.uk>:
>
>In order to use sdma with UART, we need to add DMA configuration in device tree.
>
>Signed-off-by: Fabien Lahoudere < fabien.lahoudere@...labora.co.uk >
>---
> arch/arm/boot/dts/imx53.dtsi | 10 ++++++++++
> 1 file changed, 10 insertions(+)
...

Hello.

UART SDMA has been tested by me for i.MX51.
So, on my opinion, In the first part of the patch, we just need to remove is_imx6q_uart()
check on and always let the devicetree decide about DMA usage.

Thanks.
---