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

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Message-ID: <1438675772.3793.18.camel@pengutronix.de>
Date:	Tue, 04 Aug 2015 10:09:32 +0200
From:	Philipp Zabel <p.zabel@...gutronix.de>
To:	Moritz Fischer <moritz.fischer@...us.com>
Cc:	robh+dt@...nel.org, pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	michal.simek@...inx.com, soren.brinkmann@...inx.com,
	linux@....linux.org.uk, devicetree@...r.kernel.org,
	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 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?

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

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