linux-kernel - RE: [PATCH V2] ARM: tegra: apbio access using dma for tegra20 only

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Date:	Wed, 20 Jun 2012 18:14:24 +0530
From:	Bandi Krishna Chaitanya <bandik@...dia.com>
To:	Laxman Dewangan <ldewangan@...dia.com>,
	"swarren@...dotorg.org" <swarren@...dotorg.org>,
	"ccross@...roid.com" <ccross@...roid.com>,
	"olof@...om.net" <olof@...om.net>
CC:	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH V2] ARM: tegra: apbio access using dma for tegra20 only

On Wednesday 20 June 2012 06:06 PM, Chaitanya Bandi wrote:
> 
> The Tegra20 HW issue with accessing APBIO registers (such as fuse registers)
> directly from the CPU concurrently with APB DMA accesses has been fixed in
> Tegra30 and later chips.
> 
> Access these registers directly from the CPU on Tegra30 and later, and apply
> the workaround only for Tegra20.
> 
> Signed-off-by: Laxman Dewangan <ldewangan@...dia.com>
>

Tested-by: Chaitanya Bandi <bandik@...dia.com>
Tested on Harmony with non-dt booting and confirmed that it is using the
dma based apbio access.



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