linux-kernel - Re: [PATCH v5 2/5] Documentation: DT: Add bindings for Spreadtrum SoC Platform

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Date:	Fri, 16 Jan 2015 14:11:09 +0000
From:	Mark Rutland <mark.rutland@....com>
To:	Lyra Zhang <zhang.lyra@...il.com>
Cc:	Chunyan Zhang <chunyan.zhang@...eadtrum.com>,
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	Leo Yan <leo.yan@...aro.org>
Subject: Re: [PATCH v5 2/5] Documentation: DT: Add bindings for Spreadtrum
 SoC Platform

On Fri, Jan 16, 2015 at 12:53:16PM +0000, Lyra Zhang wrote:
> Hi, Mark
> 
> >> +
> >> +Required properties:
> >> +- compatible: must be "sprd,sc9836-uart"
> >> +- reg: offset and length of the register set for the device
> >> +- interrupts: exactly one interrupt specifier
> >> +- clocks: phandles to input clocks.
> >
> > The order and relevance of each should be specified. If you have
> > multiple clocks I would strongly recommend you use clock-names to
> > distinguish them.
> >
> 
> Thank you for the recommendation.
> but, since we haven't made the clock driver ready, for this initial
> commit, we just let 4 UARTs share a single fixed 26 MHz clock source.
> we'll do like you've recommended when we will submit the clock driver
> in the future.

I'm on about the clock input lines on the UART instance, not the
providers they come from.

Is there only a single clock input line on each UART? Perhaps multiple
input lines which are currently fed by the same clock?

Thanks,
Mark.
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