From: Stefan Agner <stefan@agner.ch>
To: Alexander Stein <alexander.stein@systec-electronic.com>
Cc: Mark Brown <broonie@kernel.org>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] regmap: mmio: Fix value endianness selection
Date: Mon, 28 Mar 2016 23:11:09 -0700 [thread overview]
Message-ID: <8f62d6ec611e646449ed6fbba197c6f1@agner.ch> (raw)
In-Reply-To: <2467072.5nNY07Ee9z@ws-stein>
On 2016-03-28 23:10, Alexander Stein wrote:
> On Friday 25 March 2016 11:24:59, Mark Brown wrote:
>> On Wed, Mar 23, 2016 at 03:20:46PM +0100, Alexander Stein wrote:
>> > The difference in those drivers is that syscon manually sets
>> > config.val_format_endian before calling regmap_init_mmio.
>> > spi-fsl-dspi does not. I guess this driver relies on this configuration
>> > being done in regmap_get_val_endian. But this is never reached because
>> > after setting
>> Does this IP exist in configurations where it is anything other than big
>> endian? If not then this probably shouldn't be in DT.
>
> AFAIK it is included once or twice in the VFxxx series. CC'ed Stefan Agner for
> confirmation.
> Stefan: Is the DCU on VFxxx attached little-endian, e.g. no byte swapping
> needed when accessing the periphery?
Yes, DCU as well as DSPI is attached little endian on Vybrid (aka.
vf610).
--
Stefan
prev parent reply other threads:[~2016-03-29 6:14 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-23 13:17 Mark Brown
2016-03-23 13:38 ` Alexander Stein
2016-03-23 13:42 ` Applied "regmap: mmio: Fix value endianness selection" to the regmap tree Mark Brown
2016-03-23 14:20 ` [PATCH] regmap: mmio: Fix value endianness selection Alexander Stein
2016-03-25 11:24 ` Mark Brown
2016-03-29 6:10 ` Alexander Stein
2016-03-29 6:11 ` Stefan Agner [this message]
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