linux-kernel - Re: [PATCH v5 1/7] mfd: ac100: Add device tree bindings for X-Powers AC100 codec/RTC combo IC

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Date:	Mon, 8 Aug 2016 12:50:19 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Chen-Yu Tsai <wens@...e.org>
Cc:	Alessandro Zummo <a.zummo@...ertech.it>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	linux-kernel@...r.kernel.org, rtc-linux@...glegroups.com,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v5 1/7] mfd: ac100: Add device tree bindings for X-Powers
 AC100 codec/RTC combo IC

On Fri, 08 Jul 2016, Chen-Yu Tsai wrote:

> The AC100 is a multifunction device with an audio codec subsystem and
> an RTC subsystem. These two subsystems share a common register space
> and host interface.
> 
> Signed-off-by: Chen-Yu Tsai <wens@...e.org>
> Acked-by: Rob Herring <robh@...nel.org>
> ---
> Changes since v4:
> 
>   - Style changes suggested by Lee.
>   - Added commit message.
>   - Added Rob's ack.
> 
> Changes since v3:
> 
>   - Fixed device node names and added labels.
>   - Added clock output from codec and input to rtc.
> 
> Changes since v2:
> 
>   - Fix interrupt line for ac100_codec in provided example.
> 
> ---
>  Documentation/devicetree/bindings/mfd/ac100.txt | 54 +++++++++++++++++++++++++
>  1 file changed, 54 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mfd/ac100.txt

For my own reference:
  Acked-by: Lee Jones <lee.jones@...aro.org>

> diff --git a/Documentation/devicetree/bindings/mfd/ac100.txt b/Documentation/devicetree/bindings/mfd/ac100.txt
> new file mode 100644
> index 000000000000..b8ef00667599
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/ac100.txt
> @@ -0,0 +1,54 @@
> +X-Powers AC100 Codec/RTC IC Device Tree bindings
> +
> +AC100 is a audio codec and RTC subsystem combo IC. The 2 parts are
> +separated, including power supplies and interrupt lines, but share
> +a common register address space and host interface.
> +
> +Required properties:
> +- compatible: "x-powers,ac100"
> +- reg: The I2C slave address or RSB hardware address for the chip
> +- sub-nodes:
> +  - codec
> +    - compatible:		"x-powers,ac100-codec"
> +    - interrupt-parent:		The parent interrupt controller
> +    - interrupts:		SoC NMI / GPIO interrupt connected to the
> +    				IRQ_AUDIO pin
> +    - #clock-cells:		Shall be 0
> +    - clock-output-names:	"4M_adda"
> +
> +    - see clock/clock-bindings.txt for common clock bindings
> +
> +  - rtc
> +    - compatible:		"x-powers,ac100-rtc"
> +    - interrupt-parent:		The parent interrupt controller
> +    - interrupts:		SoC NMI / GPIO interrupt connected to the
> +    				IRQ_RTC pin
> +    - clocks:			A phandle to the codec's "4M_adda" clock
> +    - #clock-cells:		Shall be 1
> +    - clock-output-names:	"cko1_rtc", "cko2_rtc", "cko3_rtc"
> +
> +    - see clock/clock-bindings.txt for common clock bindings
> +
> +Example:
> +
> +ac100: codec@e89 {
> +	compatible = "x-powers,ac100";
> +	reg = <0xe89>;
> +
> +	ac100_codec: codec {
> +		compatible = "x-powers,ac100-codec";
> +		interrupt-parent = <&r_pio>;
> +		interrupts = <0 9 IRQ_TYPE_LEVEL_LOW>; /* PL9 */
> +		#clock-cells = <0>;
> +		clock-output-names = "4M_adda";
> +	};
> +
> +	ac100_rtc: rtc {
> +		compatible = "x-powers,ac100-rtc";
> +		interrupt-parent = <&nmi_intc>;
> +		interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
> +		clocks = <&ac100_codec>;
> +		#clock-cells = <1>;
> +		clock-output-names = "cko1_rtc", "cko2_rtc", "cko3_rtc";
> +	};
> +};

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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