linux-kernel - Re: [PATCH] ARM: zynq: DT: Add CAN node

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Date:	Thu, 24 Jul 2014 08:55:21 -0700
From:	Sören Brinkmann <soren.brinkmann@...inx.com>
To:	Michal Simek <michal.simek@...inx.com>
CC:	<linux-arm-kernel@...ts.infradead.org>, <monstr@...str.eu>,
	Josh Cartwright <josh.cartwright@...com>,
	Steffen Trumtrar <s.trumtrar@...gutronix.de>,
	Rob Herring <robherring2@...il.com>,
	Peter Crosthwaite <peter.crosthwaite@...inx.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ARM: zynq: DT: Add CAN node

On Thu, 2014-07-24 at 08:44AM +0200, Michal Simek wrote:
> On 07/23/2014 06:07 PM, Sören Brinkmann wrote:
> > On Wed, 2014-07-23 at 03:05PM +0200, Michal Simek wrote:
> >> Add node describing Zynq's CAN controller.
> >>
> >> Signed-off-by: Michal Simek <michal.simek@...inx.com>
> >> ---
> >>
> >>  arch/arm/boot/dts/zynq-7000.dtsi | 13 ++++++++++++-
> >>  1 file changed, 12 insertions(+), 1 deletion(-)
> >>
> >> diff --git a/arch/arm/boot/dts/zynq-7000.dtsi b/arch/arm/boot/dts/zynq-7000.dtsi
> >> index 366ca6434f54..2287d9b4ed1a 100644
> >> --- a/arch/arm/boot/dts/zynq-7000.dtsi
> >> +++ b/arch/arm/boot/dts/zynq-7000.dtsi
> >> @@ -71,7 +71,18 @@
> >>  			interrupts = <0 7 4>;
> >>  			interrupt-parent = <&intc>;
> >>  			clocks = <&clkc 12>;
> >> -		};
> >> +		};
> >> +
> >> +		can0: can@...08000 {
> >> +			compatible = "xlnx,zynq-can-1.0";
> >> +			clocks = <&clkc 19>, <&clkc 36>;
> >> +			clock-names = "can_clk", "pclk";
> >> +			reg = <0xe0008000 0x1000>;
> >> +			interrupts = <0 28 4>;
> >> +			interrupt-parent = <&intc>;
> >> +			tx-fifo-depth = <0x40>;
> >> +			rx-fifo-depth = <0x40>;
> >> +		};
> > 
> > What about the second CAN core? You also probably want to add
> > 'status = "disabled"' in the dtsi.
> 
> Second can core - yes.
> 
> I can add status = "disabled" but then question is if make
> sense to change status for any zynq dts file. Or just
> keep enable both.
> 
> In our repo is enabled can0 on zc702.
> 
> What do you think?

Well, it should be enabled on boards that have CAN pinned out. Does any
of our boards have that?

	Sören

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