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Message-ID: <21dba33d-9def-43e1-becd-335f6cb5fd83@CO9EHSMHS011.ehs.local>
Date: Tue, 11 Mar 2014 12:35:13 +0000
From: Appana Durga Kedareswara Rao <appana.durga.rao@...inx.com>
To: Michal Simek <michals@...inx.com>
CC: Wolfgang Grandegger <wg@...ndegger.com>,
Marc Kleine-Budde <mkl@...gutronix.de>,
Michal Simek <michals@...inx.com>,
Grant Likely <grant.likely@...aro.org>,
Rob Herring <robh+dt@...nel.org>,
"linux-can@...r.kernel.org" <linux-can@...r.kernel.org>,
netdev <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>,
"robherring2@...il.com" <robherring2@...il.com>
Subject: RE: [PATCH v5] can: xilinx CAN controller support.
Hi Michal,
> -----Original Message-----
> From: Michal Simek [mailto:michal.simek@...inx.com]
> Sent: Monday, March 10, 2014 8:53 PM
> To: Rob Herring
> Cc: Appana Durga Kedareswara Rao; Wolfgang Grandegger; Marc Kleine-
> Budde; Michal Simek; Grant Likely; Rob Herring; linux-can@...r.kernel.org;
> netdev; 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.
>
> On 03/10/2014 04:15 PM, Rob Herring wrote:
> > On Tue, Mar 4, 2014 at 7:20 AM, Kedareswara rao Appana
> > <appana.durga.rao@...inx.com> wrote:
> >> This patch adds xilinx CAN controller support.
> >> This driver supports both ZYNQ CANPS and Soft IP AXI CAN controller.
> >>
> >> Signed-off-by: Kedareswara rao Appana <appanad@...inx.com>
> >> ---
> >> This patch is rebased on the 3.14 rc5 kernel.
> >> Changes for v5:
> >> - Updated the driver with the review comments.
> >> - Remove the check for the tx fifo full interrupt condition
> >> form Tx interrupt routine as we are checking it in the _xmit
> >> routine.
> >> - Clearing the txok interrupt in the tx interrupt routine for
> >> every Tx can frame.
> >> Changes for v4:
> >> - Added check for the tx fifo full interrupt condition in
> >> Tx interrupt routine.
> >> - Added be iohelper functions.
> >> - Moved the clock enable/disable to probe/remove because of
> >> Added big endian support for AXI CAN controller case(reading
> >> a register during probe for that we need to enable clock).
> >> Changes for v3:
> >> - Updated the driver with the review comments.
> >> - Modified the tranmit logic as per Marc suggestion.
> >> - Enabling the clock when the interface is up to reduce the
> >> Power consumption.
> >> Changes for v2:
> >> - Updated with the review comments.
> >> - Removed the unnecessary debug prints.
> >> - include tx,rx fifo depths in ZYNQ CANPS case also.
> >> ---
> >> .../devicetree/bindings/net/can/xilinx_can.txt | 45 +
> >> drivers/net/can/Kconfig | 7 +
> >> drivers/net/can/Makefile | 1 +
> >> drivers/net/can/xilinx_can.c | 1195 ++++++++++++++++++++
> >> 4 files changed, 1248 insertions(+), 0 deletions(-) create mode
> >> 100644 Documentation/devicetree/bindings/net/can/xilinx_can.txt
> >> create mode 100644 drivers/net/can/xilinx_can.c
> >>
> >> 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"
> >> + (See clock bindings for details. Two clocks are
> >> + required for Zynq CAN. For Axi CAN
> >> + case it is one(ref_clk)).
> >> +- clocks : Clock phandles (see clock bindings for details).
> >> +- tx-fifo-depth : Can Tx fifo depth.
> >> +- rx-fifo-depth : Can Rx fifo depth.
> >> +
> >> +
> >> +Example:
> >> +
> >> +For Zynq CANPS Dts file:
> >> + zynq_can_0: zynq-can@...08000 {
> >
> > The preferred node name convention is to use the type of device. There
> > is no standard in this case, but I would use just "can@...".
> >
> > Otherwise, for the binding:
> >
> > Acked-by: Rob Herring <robh@...nel.org>
>
> Thanks Rob for your ACK.
>
> Kedar: You have got more things to change from Marc that's why please
> change this too.
>
Thanks Rob for the ACk
Michal@ I will do
Regards,
Kedar.
> Thanks,
> Michal
>
>
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