linux-kernel - Re: [PATCH v3 0/6] uio_pruss cleanup and platform support

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Message-ID: <20121004091145.GA3317@pengutronix.de>
Date:	Thu, 4 Oct 2012 11:11:45 +0200
From:	Philipp Zabel <pza@...gutronix.de>
To:	Matt Porter <mporter@...com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Hans J. Koch" <hjk@...sjkoch.de>, Sekhar Nori <nsekhar@...com>,
	Ben Gardiner <bengardiner@...ometrics.ca>,
	Linux DaVinci Kernel List 
	<davinci-linux-open-source@...ux.davincidsp.com>,
	Russell King <linux@....linux.org.uk>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3 0/6] uio_pruss cleanup and platform support

Hi Matt,

On 10/3/12, Matt Porter <mporter@...com> wrote:
> This series enables uio_pruss on DA850 and removes use of the
> private SRAM API by the driver. The driver previously was not
> enabled by any platform and the private SRAM API was accessing
> an invalid SRAM bank.

have you seen my SRAM patch series at https://lkml.org/lkml/2012/9/7/281
"Add device tree support for on-chip SRAM" ?

I think the generic SRAM/genalloc driver (https://lkml.org/lkml/2012/9/7/282)
could be useful to map the L3RAM on Davinci.
With the gen_pool lookup patch (https://lkml.org/lkml/2012/9/7/284) the
uio_pruss driver could then use the gen_pool_find_by_phys() (or
of_get_named_gen_pool() for initialization from device tree) to
retrieve the struct gen_pool*.

This way you could avoid handing it over via platform data and you could
get rid of arch/arm/mach-davinci/{sram.c,include/mach/sram.h} completely.

regards
Philipp

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