linux-kernel - Re: [PATCH v2 1/3] Documentation: DT: Add iproc-static-adc binding

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Message-ID: <20160620180458.GA10171@rob-hp-laptop>
Date:	Mon, 20 Jun 2016 13:04:58 -0500
From:	Rob Herring <robh@...nel.org>
To:	Raveendra Padasalagi <raveendra.padasalagi@...adcom.com>
Cc:	Jonathan Cameron <jic23@...nel.org>,
	Peter Meerwald-Stadler <pmeerw@...erw.net>,
	Russell King <linux@....linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>, linux-iio@...r.kernel.org,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Jonathan Richardson <jonathar@...adcom.com>,
	Jon Mason <jonmason@...adcom.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	Anup Patel <anup.patel@...adcom.com>,
	Ray Jui <rjui@...adcom.com>,
	Scott Branden <sbranden@...adcom.com>,
	Pramod Kumar <pramod.kumar@...adcom.com>,
	linux-kernel@...r.kernel.org, bcm-kernel-feedback-list@...adcom.com
Subject: Re: [PATCH v2 1/3] Documentation: DT: Add iproc-static-adc binding

On Sun, Jun 19, 2016 at 03:36:28PM +0530, Raveendra Padasalagi wrote:
> The patch adds devicetree binding document for broadcom's
> iproc-static-adc controller driver.
> 
> Signed-off-by: Raveendra Padasalagi <raveendra.padasalagi@...adcom.com>
> Reviewed-by: Ray Jui <ray.jui@...adcom.com>
> Reviewed-by: Scott Branden <scott.branden@...adcom.com>
> ---
>  .../bindings/iio/adc/brcm,iproc-static-adc.txt     | 43 ++++++++++++++++++++++
>  1 file changed, 43 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/adc/brcm,iproc-static-adc.txt
> 
> diff --git a/Documentation/devicetree/bindings/iio/adc/brcm,iproc-static-adc.txt b/Documentation/devicetree/bindings/iio/adc/brcm,iproc-static-adc.txt
> new file mode 100644
> index 0000000..1de0dfa
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/adc/brcm,iproc-static-adc.txt
> @@ -0,0 +1,43 @@
> +* Broadcom's IPROC Static ADC controller
> +
> +Required properties:
> +
> +- compatible: Must be "brcm,iproc-static-adc"
> +

> +- #address-cells: Specify the number of u32 entries needed in child nodes.
> +  Should set to 1.
> +
> +- #size-cells: Specify number of u32 entries needed to specify child nodes size
> +  in reg property. Should set to 1.

Why are these needed? What child nodes can you have?

> +
> +- adc-syscon: Handler of syscon node defining physical base address of the
> +  controller and length of memory mapped region.
> +
> +- #io-channel-cells = <1>; As ADC has multiple outputs
> +  refer to Documentation/devicetree/bindings/iio/iio-bindings.txt for details.
> +
> +- clocks: Clock used for this block.
> +
> +- clock-names: Clock name should be given as tsc_clk.
> +
> +- interrupts: interrupt line number.
> +
> +For example:
> +
> +	ts_adc_syscon: ts_adc_syscon@...a6000 {
> +		compatible = "brcm,iproc-ts-adc-syscon","syscon";
> +		reg = <0x180a6000 0xc30>;
> +	};
> +
> +	adc: adc@...a6000 {
> +		compatible = "brcm,iproc-static-adc";
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		adc-syscon = <&ts_adc_syscon>;
> +		#io-channel-cells = <1>;
> +		io-channel-ranges;
> +		clocks = <&asiu_clks BCM_CYGNUS_ASIU_ADC_CLK>;
> +		clock-names = "tsc_clk";
> +		interrupts = <GIC_SPI 164 IRQ_TYPE_LEVEL_HIGH>;
> +		status = "disabled";
> +	};
> -- 
> 1.9.1
>