linux-kernel - RE: [PATCH v5] can: xilinx CAN controller support.

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Date:	Wed, 5 Mar 2014 07:03:46 +0000
From:	Appana Durga Kedareswara Rao <appana.durga.rao@...inx.com>
To:	Soren Brinkmann <sorenb@...inx.com>
CC:	"wg@...ndegger.com" <wg@...ndegger.com>,
	"mkl@...gutronix.de" <mkl@...gutronix.de>,
	Michal Simek <michals@...inx.com>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>,
	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	"linux-can@...r.kernel.org" <linux-can@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: RE: [PATCH v5] can: xilinx CAN controller support.

Hi Soren,

> -----Original Message-----
> From: Sören Brinkmann [mailto:soren.brinkmann@...inx.com]
> Sent: Wednesday, March 05, 2014 5:21 AM
> To: Appana Durga Kedareswara Rao
> Cc: wg@...ndegger.com; mkl@...gutronix.de; Michal Simek;
> grant.likely@...aro.org; robh+dt@...nel.org; linux-can@...r.kernel.org;
> netdev@...r.kernel.org; linux-arm-kernel@...ts.infradead.org; linux-
> kernel@...r.kernel.org; devicetree@...r.kernel.org; Appana Durga
> Kedareswara Rao
> Subject: Re: [PATCH v5] can: xilinx CAN controller support.
>
> Hi Kedar,
>
> On Tue, 2014-03-04 at 06:50PM +0530, Kedareswara rao Appana wrote:
> > This patch adds xilinx CAN controller support.
> > This driver supports both ZYNQ CANPS and Soft IP AXI CAN controller.
> >
> [...]
> > diff --git a/Documentation/devicetree/bindings/net/can/xilinx_can.txt
> > b/Documentation/devicetree/bindings/net/can/xilinx_can.txt
> > new file mode 100644
> > index 0000000..0e57103
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/net/can/xilinx_can.txt
> > @@ -0,0 +1,45 @@
> > +Xilinx Axi CAN/Zynq CANPS controller Device Tree Bindings
> > +---------------------------------------------------------
> > +
> > +Required properties:
> > +- compatible               : Should be "xlnx,zynq-can-1.00.a" for Zynq
> CAN
> > +                     controllers and "xlnx,axi-can-1.00.a" for Axi CAN
> > +                     controllers.
> > +- reg                      : Physical base address and size of the Axi CAN/Zynq
> > +                     CANPS registers map.
> > +- interrupts               : Property with a value describing the interrupt
> > +                     number.
> > +- interrupt-parent : Must be core interrupt controller
> > +- clock-names              : List of input clock names - "ref_clk",
> "aper_clk"
>
> Let's reconsider these names. These are rather Zynq specific names. Does
> the IP documentation use these as well? The names should match the
> naming used for the IP, rather than the SOC. Is this the correct data sheet:
> http://www.xilinx.com/support/documentation/ip_documentation/axi_can
> /v1_03_a/ds791_axi_can.pdf
> ? According to that the names should rather be 's_axi_aclk' and 'can_clk',
> IMHO.

Axi CAN driver uses only one clock i.e ref_clk the name in the documentation for this clock is can_clk.
Ok will change the clock name to can_clk.


Regards,
Kedar.

>
>       Sören



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