linux-kernel - RE: [PATCH v2 05/11] ARM: dts: zynq: Add QSPI for Parallella

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Date:	Fri, 25 Jul 2014 10:31:08 +0000
From:	Harini Katakam <harini.katakam@...inx.com>
To:	Michal Simek <michals@...inx.com>,
	Andreas Färber <afaerber@...e.de>,
	"monstr@...str.eu" <monstr@...str.eu>,
	Soren Brinkmann <sorenb@...inx.com>
CC:	Michal Simek <michals@...inx.com>,
	Andreas Olofsson <andreas@...pteva.com>,
	Matteo Vit <matteo.vit@...rwaredesign.com>,
	"Sean Rickerd" <srickerd@...e.com>,
	"devicetree@...r.kernel.org" <devicetree@...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>,
	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>
Subject: RE: [PATCH v2 05/11] ARM: dts: zynq: Add QSPI for Parallella

Hi,

> -----Original Message-----
> From: Michal Simek [mailto:michal.simek@...inx.com]
> Sent: Friday, July 25, 2014 3:08 PM
> To: Andreas Färber; monstr@...str.eu; Soren Brinkmann
> Cc: Harini Katakam; Michal Simek; Andreas Olofsson; Matteo Vit; Sean
> Rickerd; devicetree@...r.kernel.org; linux-arm-kernel@...ts.infradead.org;
> linux-kernel@...r.kernel.org; Rob Herring; Pawel Moll; Mark Rutland; Ian
> Campbell; Kumar Gala; Russell King
> Subject: Re: [PATCH v2 05/11] ARM: dts: zynq: Add QSPI for Parallella
> 
> On 07/25/2014 10:42 AM, Andreas Färber wrote:
> > Am 25.07.2014 09:59, schrieb Michal Simek:
> >> On 07/25/2014 01:18 AM, Sören Brinkmann wrote:
> >>> On Fri, 2014-07-25 at 01:00AM +0200, Andreas Färber wrote:
> >>>> Prepare SPI0 and SPI1 while at it.
> >
> >> Patch subject is incorrect. You are adding SPI and QSPI.
> >
> > Yes, it originally added only QSPI, but I considered it a good deed to
> > add SPI as well while already reading that part of the TRM. :)
> >
> >>>>
> >>>> Signed-off-by: Andreas Färber <afaerber@...e.de> --- v2: New
> >>>>
> >>>> arch/arm/boot/dts/zynq-7000.dtsi      | 37
> >>>> +++++++++++++++++++++++++++++++++++
> >>>> arch/arm/boot/dts/zynq-parallella.dts |  4 ++++ 2 files
> >>>> changed, 41 insertions(+)
> >>>>
> >>>> diff --git a/arch/arm/boot/dts/zynq-7000.dtsi
> >>>> b/arch/arm/boot/dts/zynq-7000.dtsi index 8fd826a..eed3df0
> >>>> 100644 --- a/arch/arm/boot/dts/zynq-7000.dtsi +++
> >>>> b/arch/arm/boot/dts/zynq-7000.dtsi @@ -122,6 +122,30 @@
> >>>> interrupts = <0 50 4>; };
> >>>>
> >>>> +		spi0: spi@...06000 { +			compatible =
> "xlnx,zynq-spi-r1p6";
> >>>> +			reg = <0xe0006000 0x1000>; +			status
> = "disabled"; +
> >>>> interrupt-parent = <&intc>; +			interrupts = <0 26 4>;
> +
> >>>> clocks = <&clkc 25>, <&clkc 34>; +			clock-names =
> "ref_clk",
> >>>> "pclk"; +			#address-cells = <1>; +			#size-
> cells = <0>; +		};
> >>>> + +		spi1: spi@...07000 { +			compatible =
> >>>> "xlnx,zynq-spi-r1p6"; +			reg = <0xe0007000 0x1000>; +
> 			status
> >>>> = "disabled"; +			interrupt-parent = <&intc>; +
> 		interrupts =
> >>>> <0 49 4>; +			clocks = <&clkc 26>, <&clkc 35>; +
> 		clock-names
> >>>> = "ref_clk", "pclk"; +			#address-cells = <1>; +
> 		#size-cells
> >>>> = <0>; +		}; +
> >>> Until here things look good.
> >>>
> >>>> gem0: ethernet@...0b000 { compatible = "cdns,gem"; reg =
> >>>> <0xe000b000 0x4000>; @@ -140,6 +164,19 @@ clock-names = "pclk",
> >>>> "hclk", "tx_clk"; };
> >>>>
> >>>> +		qspi: qspi@...0d000 { +			compatible =
> >>>> "xlnx,zynq-spi-r1p6"; +			reg = <0xe000d000 0x1000>; +
> 			status
> >>>> = "disabled"; +			interrupt-parent = <&intc>; +
> 		interrupts =
> >>>> <0 19 4>; +			clocks = <&clkc 10>, <&clkc 43>; +
> 		clock-names
> >>>> = "ref_clk", "pclk"; +			num-cs = <1>; +
> 	#address-cells =
> >>>> <1>; +			#size-cells = <0>; +		}; +
> >>> I'm not sure what the status of this driver is. I think QSPI is
> >>> still under review on the mailing lists and I don't think we
> >>> should add this yet.
> >
> >> Driver for qspi is not in the mainline yet but it doesn't mean that
> >> this fragment won't work. Harini: Can you please correct me if I am
> >> wrong?
> >

It can be added but it will have to be disabled as there is no qspi driver
at the moment in mainline.

Regards,
Harini