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

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Date:	Thu, 20 Mar 2014 04:41:56 +0000
From:	Appana Durga Kedareswara Rao <appana.durga.rao@...inx.com>
To:	"monstr@...str.eu" <monstr@...str.eu>,
	Marc Kleine-Budde <mkl@...gutronix.de>
CC:	"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>,
	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>,
	Michal Simek <michals@...inx.com>,
	"wg@...ndegger.com" <wg@...ndegger.com>,
	"fengguang.wu@...el.com" <fengguang.wu@...el.com>
Subject: RE: [PATCH v5] can: xilinx CAN controller support.

Hi Marc,

> -----Original Message-----
> From: Michal Simek [mailto:monstr@...str.eu]
> Sent: Wednesday, March 12, 2014 3:32 PM
> To: Marc Kleine-Budde
> Cc: Appana Durga Kedareswara Rao; linux-can@...r.kernel.org;
> netdev@...r.kernel.org; linux-arm-kernel@...ts.infradead.org; linux-
> kernel@...r.kernel.org; devicetree@...r.kernel.org; robh+dt@...nel.org;
> grant.likely@...aro.org; Michal Simek; wg@...ndegger.com;
> fengguang.wu@...el.com
> Subject: Re: [PATCH v5] can: xilinx CAN controller support.
>
> On 03/11/2014 01:48 PM, Marc Kleine-Budde wrote:
> > On 03/11/2014 01:34 PM, Appana Durga Kedareswara Rao wrote:
> >
> >>>> diff --git a/drivers/net/can/Kconfig b/drivers/net/can/Kconfig
> >>>> index
> >>>> 9e7d95d..b180239 100644
> >>>> --- a/drivers/net/can/Kconfig
> >>>> +++ b/drivers/net/can/Kconfig
> >>>> @@ -125,6 +125,13 @@ config CAN_GRCAN
> >>>>       endian syntheses of the cores would need some modifications on
> >>>>       the hardware level to work.
> >>>>
> >>>> +config CAN_XILINXCAN
> >>>> +   tristate "Xilinx CAN"
> >>>> +   depends on ARCH_ZYNQ || MICROBLAZE
> >>>
> >>> Is Zynq multiarch already?
> >> Discussions are going on this
> >> So the final thing that Fengguang ( fengguang.wu@...el.com) Proposed
> >> is
> >>         config CAN_XILINX
> >>         tristate "Xilinx CAN"
> >>         depends on ARCH_ZYNQ || MICROBLAZE || COMPILE_TEST
> >>         depends on COMMON_CLK && HAS_MMIO  # whatever you need for
> >> other architectures
> >
> >> Are you Ok for this?
> >
> > You have to fill the 2nd depends on with some sane values, though.
>
> This should be that one
> config CAN_XILINX
>          tristate "Xilinx CAN"
>          depends on ARCH_ZYNQ || MICROBLAZE || COMPILE_TEST
>          depends on COMMON_CLK && HAS_IOMEM
>
>
> Is there any driver which is in CAN which not use MMIO accesses?
> If not, maybe we should just add dependency to



Can you please comment on this?
I had update driver with all the other comments I had a little confusion regarding
Which Kconfig options I need to use.

Regards,
Kedar.


> Thanks,
> Michal
>
>
>
> --
> Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
> w: www.monstr.eu p: +42-0-721842854
> Maintainer of Linux kernel - Microblaze cpu - http://www.monstr.eu/fdt/
> Maintainer of Linux kernel - Xilinx Zynq ARM architecture Microblaze U-
> BOOT custodian and responsible for u-boot arm zynq platform
>



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