Re: [PATCH 1/2] devicetree: Add devicetree bindings documentation for Zynq Quad SPI

[Harini Katakam <harinikatakamlinux@gmail.com>]

Hi Soren

On Thu, Apr 3, 2014 at 11:20 PM, Sören Brinkmann
<soren.brinkmann@xilinx.com> wrote:
> Hi Punnaiah,
>
> On Thu, 2014-04-03 at 10:33PM +0530, Punnaiah Choudary Kalluri wrote:
>> Add bindings documentation for Zynq Quad SPI driver.
>>
>> Signed-off-by: Punnaiah Choudary Kalluri <punnaia@xilinx.com>
>> ---
>>  .../devicetree/bindings/spi/spi-zynq-qspi.txt      |   26 ++++++++++++++++++++
>>  1 file changed, 26 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/spi/spi-zynq-qspi.txt
>>
>> diff --git a/Documentation/devicetree/bindings/spi/spi-zynq-qspi.txt b/Documentation/devicetree/bindings/spi/spi-zynq-qspi.txt
>> new file mode 100644
>> index 0000000..88e00f8
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/spi/spi-zynq-qspi.txt
>> @@ -0,0 +1,26 @@
>> +Xilinx Zynq QSPI controller Device Tree Bindings
>> +-------------------------------------------------
>> +
>> +Required properties:
>> +- compatible         : Should be "xlnx,zynq-qspi-1.0".
>> +- reg                        : Physical base address and size of QSPI 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).
>> +- clocks             : Clock phandles (see clock bindings for details).
>> +
>> +Optional properties:
>> +- num-cs             : Number of chip selects used.
>> +
>> +Example:
>> +     qspi@e000d000 {
>> +             compatible = "xlnx,zynq-qspi-1.0";
>> +             clock-names = "ref_clk", "aper_clk";
>
> These seem to be the SOC names of the clocks. Doesn't have the IP its
> own naming for these clock inputs?
>

The IP design spec uses the name ref_clk.
There is no particular clock name used for for APB clock.
So I think aper_clk is a valid name to use.

Regards,
Harini