From: Mark Brown <broonie@kernel.org>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Linux-sh list <linux-sh@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
linux-spi@vger.kernel.org,
Geert Uytterhoeven <geert+renesas@linux-m68k.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>
Subject: Re: [PATCH v2 6/8] [RFC] Documentation: dt: Add Renesas RSPI/QSPI bindings
Date: Mon, 30 Dec 2013 13:50:58 +0000 [thread overview]
Message-ID: <20131230135058.GD31886@sirena.org.uk> (raw)
In-Reply-To: <CAMuHMdXYH6KmH3ZstAvhqUpqXWEbg6sjdUTDRZUrUthdPg-6aQ@mail.gmail.com>
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On Mon, Dec 30, 2013 at 02:43:53PM +0100, Geert Uytterhoeven wrote:
> On Mon, Dec 30, 2013 at 1:58 PM, Mark Brown <broonie@kernel.org> wrote:
> > On Fri, Dec 27, 2013 at 09:16:00PM +0100, Geert Uytterhoeven wrote:
> >> +- num-cs : Number of chip selects
> > Why is this variable and how does this map onto hardware?
> It's my understanding that legacy RSPi on SH7757 has 2 chip selects,
> while other RSPI implementations have 1 chip select.
So this should be documented in the binding document in a way that
allows someone reading the document and looking at the datasheet to
figure out how to pick the value (for example, refer to how the chip
selects are controlled in the hardware).
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next prev parent reply other threads:[~2013-12-30 13:50 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1388175362-17132-1-git-send-email-geert@linux-m68k.org>
2013-12-27 20:16 ` [PATCH v2 6/8] [RFC] Documentation: dt: Add Renesas RSPI/QSPI bindings Geert Uytterhoeven
[not found] ` <1388175362-17132-7-git-send-email-geert-Td1EMuHUCqxL1ZNQvxDV9g@public.gmane.org>
2013-12-30 12:58 ` Mark Brown
2013-12-30 13:43 ` Geert Uytterhoeven
2013-12-30 13:50 ` Mark Brown [this message]
2013-12-27 20:16 ` [PATCH v2 7/8] [RFC] ARM: shmobile: r7s72100 dtsi: Add RSPI nodes Geert Uytterhoeven
2013-12-27 20:16 ` [PATCH v2 8/8] [RFC] ARM: shmobile: genmai reference: " Geert Uytterhoeven
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