linux-kernel - Re: [RFCv3 1/4] docs: dts: Added documentation for Xilinx Zynq Reset Controller bindings.

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Message-ID: <CAAtXAHeauiD5smAqMbheJWuv4BT-2YqJWOSBjYPq900icpT1Rg@mail.gmail.com>
Date:	Tue, 4 Aug 2015 08:05:36 -0700
From:	Moritz Fischer <moritz.fischer@...us.com>
To:	Philipp Zabel <p.zabel@...gutronix.de>
Cc:	robh+dt@...nel.org, pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, Kumar Gala <galak@...eaurora.org>,
	Michal Simek <michal.simek@...inx.com>,
	Sören Brinkmann <soren.brinkmann@...inx.com>,
	linux@....linux.org.uk, devicetree@...r.kernel.org,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [RFCv3 1/4] docs: dts: Added documentation for Xilinx Zynq Reset
 Controller bindings.

Hi Philip,

On Tue, Aug 4, 2015 at 1:09 AM, Philipp Zabel <p.zabel@...gutronix.de> wrote:
> Hi Moritz,
>
> Am Donnerstag, den 30.07.2015, 18:13 -0700 schrieb Moritz Fischer:
>> Signed-off-by: Moritz Fischer <moritz.fischer@...us.com>
>> ---
>>  .../devicetree/bindings/reset/zynq-reset.txt       | 68 ++++++++++++++++++++++
>>  1 file changed, 68 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/reset/zynq-reset.txt
>>
>> diff --git a/Documentation/devicetree/bindings/reset/zynq-reset.txt b/Documentation/devicetree/bindings/reset/zynq-reset.txt
>> new file mode 100644
>> index 0000000..498c037a
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/reset/zynq-reset.txt
>> @@ -0,0 +1,68 @@
>> +Xilinx Zynq Reset Manager
>> +
>> +The Zynq AP-SoC has several different resets.
>> +
>> +See Chapter 26 of the Zynq TRM (UG585) for more information about Zynq resets.
>> +
>> +Required properties:
>> +- compatible: "xlnx,zynq-reset"
>> +- reg: SLCR offset and size taken via syscon <0x200 0x48>
>> +- syscon: <&slcr>
>> +  This should be a phandle to the Zynq's SLCR register.
>
>                                                  ^ register singular?
Do you want me to resend the entire set, or are you cool with just git
amending the 's' for registers?

> I still think the syscon phandle property is superfluous,
> but I'm fine with keeping it for consistency.

Thanks.
> It could always be made optional later.
>
>> +- #reset-cells: Must be 1
>> +
>> +The Zynq Reset Manager needs to be a childnode of the SLCR.
>> +
>> +Example:
>> +     rstc: rstc@200 {
>> +             compatible = "xlnx,zynq-reset";
>> +             reg = <0x200 0x48>;
>> +             #reset-cells = <1>;
>> +             syscon = <&slcr>;
>> +     };
>> +
>> +Reset outputs:
>> + 0  : soft reset
>> + 32 : ddr reset
>> + 64 : topsw reset
>> + 96 : dmac reset
>> + 128: usb0 reset
>> + 129: usb1 reset
>> + 160: gem0 reset
>> + 161: gem1 reset
>> + 164: gem0 rx reset
>> + 165: gem1 rx reset
>> + 166: gem0 ref reset
>> + 167: gem1 ref reset
>> + 192: sdio0 reset
>> + 193: sdio1 reset
>> + 196: sdio0 ref reset
>> + 197: sdio1 ref reset
>> + 224: spi0 reset
>> + 225: spi1 reset
>> + 226: spi0 ref reset
>> + 227: spi1 ref reset
>> + 256: can0 reset
>> + 257: can1 reset
>> + 258: can0 ref reset
>> + 259: can1 ref reset
>> + 288: i2c0 reset
>> + 289: i2c1 reset
>> + 320: uart0 reset
>> + 321: uart1 reset
>> + 322: uart0 ref reset
>> + 323: uart1 ref reset
>> + 352: gpio reset
>> + 384: lqspi reset
>> + 385: qspi ref reset
>> + 416: smc reset
>> + 417: smc ref reset
>> + 448: ocm reset
>> + 512: fpga0 out reset
>> + 513: fpga1 out reset
>> + 514: fpga2 out reset
>> + 515: fpga3 out reset
>> + 544: a9 reset 0
>> + 545: a9 reset 1
>> + 552: peri reset
>> +
>
> regards
> Philipp
>

Cheers,

Moritz
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