From: Chris Brandt <Chris.Brandt@renesas.com>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Mark Brown <broonie@kernel.org>, Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>,
linux-spi <linux-spi@vger.kernel.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>,
Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
linux-clk <linux-clk@vger.kernel.org>,
Mason Yang <masonccyang@mxic.com.tw>,
Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Subject: RE: [PATCH 6/6] dt-bindings: spi: Document Renesas SPIBSC bindings
Date: Wed, 4 Dec 2019 11:19:34 +0000 [thread overview]
Message-ID: <TY1PR01MB1562E541CEE3FB413CB5B1F08A5D0@TY1PR01MB1562.jpnprd01.prod.outlook.com> (raw)
In-Reply-To: <CAMuHMdXKSWeBdCDc6u5KWE67nD_9FStr9A_vb_5K=qpQ_y8bSw@mail.gmail.com>
Hi Geert,
> > But "mtd-rom" doesn't really have anything to do with the
> > functionality of the driver when it is being used in "SPI mode".
>
> Correct. But DT describes hardware. If the FLASH is used in direct mapped
> mode, that should be described in DT.
So it seems we are going back to my original plan:
Always enable the SPIBSC node in the .dts to ensure the clocks
stay on for the XIP kernel case. But, if there is no spi-nor partitions in
the node, then simple drop out and do not register the device as a SPI
controller.
However, you can have mtd-rom partitions in there which is what XIP Linux will
use, but we still don't need to register a spi controller for that.
Do you agree?????
> > > interrupts? RZ/A2M seems to have an SPIBSC interrupt, RZ/A1 hasn't.
> >
> > There was never any interrupts in the SPIBSC.
> > But it looks like when they added HyperFlash and OctaFlash support,
> > they put in some interrupts for that.
> > And now that I look at it, they are for pins labeled RPC_INT, RPC_WC,
> RPC_RESET.
> > (I just realized that "RPC" stands for "Reduced Pin Count")
> >
> > So....am I supposed to add in that interrupt even though I'm not
> > planning on using it??
>
> DT describes hardware, not driver limitations.
OK. I will add the interrupt to the DT.
Chris
prev parent reply other threads:[~2019-12-04 11:19 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-03 3:45 [PATCH 0/6] spi: Add Renesas SPIBSC controller Chris Brandt
2019-12-03 3:45 ` [PATCH 1/6] clk: renesas: mstp: Add critical clock from device tree support Chris Brandt
2019-12-03 18:32 ` Geert Uytterhoeven
2019-12-03 18:46 ` Chris Brandt
2019-12-03 18:51 ` Geert Uytterhoeven
2019-12-03 3:45 ` [PATCH 2/6] ARM: dts: r7s72100: Add SPIBSC clocks Chris Brandt
2019-12-03 18:42 ` Geert Uytterhoeven
2019-12-03 18:57 ` Chris Brandt
2019-12-03 19:12 ` Geert Uytterhoeven
2019-12-04 8:38 ` Lee Jones
2019-12-04 9:03 ` Geert Uytterhoeven
2019-12-04 9:47 ` Lee Jones
2019-12-04 11:00 ` Chris Brandt
2019-12-03 3:45 ` [PATCH 3/6] clk: renesas: r7s9210: Add SPIBSC clock Chris Brandt
2019-12-03 18:49 ` Geert Uytterhoeven
2019-12-03 19:09 ` Chris Brandt
2019-12-03 20:40 ` Geert Uytterhoeven
2019-12-04 3:09 ` Chris Brandt
2019-12-03 3:45 ` [PATCH 4/6] spi: Add SPIBSC driver Chris Brandt
2019-12-03 14:19 ` Mark Brown
2019-12-03 15:00 ` Chris Brandt
2019-12-03 18:29 ` Geert Uytterhoeven
2019-12-04 11:25 ` Mark Brown
2019-12-04 12:14 ` Geert Uytterhoeven
2019-12-04 15:51 ` Chris Brandt
2019-12-04 16:49 ` Mark Brown
2019-12-03 18:28 ` Geert Uytterhoeven
2019-12-04 11:18 ` Mark Brown
2019-12-04 22:12 ` Chris Brandt
2019-12-03 3:45 ` [PATCH 5/6] ARM: dts: r7s9210: Add SPIBSC Device support Chris Brandt
2019-12-03 18:59 ` Geert Uytterhoeven
2019-12-03 22:38 ` Chris Brandt
2019-12-04 7:57 ` Geert Uytterhoeven
2019-12-04 11:04 ` Chris Brandt
2019-12-03 3:45 ` [PATCH 6/6] dt-bindings: spi: Document Renesas SPIBSC bindings Chris Brandt
2019-12-03 9:14 ` Sergei Shtylyov
2019-12-03 13:27 ` Chris Brandt
2019-12-03 16:04 ` Sergei Shtylyov
2019-12-03 16:35 ` Chris Brandt
2019-12-03 18:57 ` Geert Uytterhoeven
2019-12-03 20:39 ` Geert Uytterhoeven
2019-12-04 2:54 ` Chris Brandt
2019-12-04 8:56 ` Geert Uytterhoeven
2019-12-04 13:31 ` Chris Brandt
2019-12-05 15:48 ` Geert Uytterhoeven
2019-12-05 16:00 ` Chris Brandt
2019-12-04 8:40 ` Geert Uytterhoeven
2019-12-03 22:33 ` Chris Brandt
2019-12-04 8:43 ` Geert Uytterhoeven
2019-12-04 11:19 ` Chris Brandt [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=TY1PR01MB1562E541CEE3FB413CB5B1F08A5D0@TY1PR01MB1562.jpnprd01.prod.outlook.com \
--to=chris.brandt@renesas.com \
--cc=broonie@kernel.org \
--cc=devicetree@vger.kernel.org \
--cc=geert+renesas@glider.be \
--cc=geert@linux-m68k.org \
--cc=linux-clk@vger.kernel.org \
--cc=linux-renesas-soc@vger.kernel.org \
--cc=linux-spi@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=masonccyang@mxic.com.tw \
--cc=mturquette@baylibre.com \
--cc=robh+dt@kernel.org \
--cc=sboyd@kernel.org \
--cc=sergei.shtylyov@cogentembedded.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.