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

Harini Katakam
2014-07-25T10:31:18Z

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Hi,

> -----Original Message-----
> From: Michal Simek [mailto:michal.simek@xilinx.com]
> Sent: Friday, July 25, 2014 3:08 PM
> To: Andreas FÃ¤rber; monstr@monstr.eu; Soren Brinkmann
> Cc: Harini Katakam; Michal Simek; Andreas Olofsson; Matteo Vit; Sean
> Rickerd; devicetree@vger.kernel.org; linux-arm-kernel@lists.infradead.org;
> linux-kernel@vger.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 FÃ¤rber wrote:
> > Am 25.07.2014 09:59, schrieb Michal Simek:
> >> On 07/25/2014 01:18 AM, SÃ¶ren Brinkmann wrote:
> >>> On Fri, 2014-07-25 at 01:00AM +0200, Andreas FÃ¤rber 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 FÃ¤rber <afaerber@suse.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@e0006000 { + 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@e0007000 { + 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@e000b000 { compatible = "cdns,gem"; reg =
> >>>> <0xe000b000 0x4000>; @@ -140,6 +164,19 @@ clock-names = "pclk",
> >>>> "hclk", "tx_clk"; };
> >>>>
> >>>> + qspi: qspi@e000d000 { + 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
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