linux-kernel - Re: [PATCH 1/4] ARM: tegra30: Add support for Uart clock source divider as 15.1

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Date:	Tue, 18 Dec 2012 11:44:56 +0530
From:	Prashant Gaikwad <pgaikwad@...dia.com>
To:	Stephen Warren <swarren@...dotorg.org>
CC:	Laxman Dewangan <ldewangan@...dia.com>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/4] ARM: tegra30: Add support for Uart clock source divider
 as 15.1

On Tuesday 18 December 2012 03:13 AM, Stephen Warren wrote:
> On 12/17/2012 05:08 AM, Laxman Dewangan wrote:
>> Tegra20 uart clock source have the 15.1 clock divider in place of
> That says Tegra20, but ...
>
>> 7.1. Add support for 15.1 clock divider and change the uart clock divider
>> flag to DIV_U151.
>>   arch/arm/mach-tegra/clock.h               |    3 +-
>>   arch/arm/mach-tegra/tegra30_clocks.c      |   70 ++++++++++++++++++++++------
>>   arch/arm/mach-tegra/tegra30_clocks_data.c |   10 ++--
> ... the patch only modifies Tegra30. Do both Tegra20 and Tegra30 have
> this feature; should both clock drivers be updated?
>
> BTW, Prashant is reworking the Tegra clock support to be modular, rather
> than having a single monolithic "Tegra clock" type, and also moving the
> code to drivers/clk. This patch will conflict signifcantly with that.
> Please work with him to integrate this patch into his rework series,
> either before or after his changes, and have him include the patch when
> he posts his series. You'll also need to think about whether/how your
> and his series depend on each-other.
>
> ... but: Is this a pure bug-fix? If so, I guess this patch should be
> applied before Prashant's patches, and this patch also Cc: stable?

My clock driver rework includes this fix. Divider supports both DIVU71 
and DIVU151.
UART divider is set to DIVU151.


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