Re: [PATCH v4 4/4] arm64: dts: rockchip: add analog audio on Quartz64

[Chris Morgan <macroalpha82@gmail.com>]

On Sat, Sep 04, 2021 at 01:15:36AM +0200, Nicolas Frattaroli wrote:
> On the Quartz64 Model A, the I2S1 TDM controller is connected
> to the rk817 codec in I2S mode. Enabling it and adding the
> necessary simple-sound-card and codec nodes allows for analog
> audio output on the PINE64 Quartz64 Model A SBC.
> 
> Signed-off-by: Nicolas Frattaroli <frattaroli.nicolas@gmail.com>
> ---
>  .../boot/dts/rockchip/rk3566-quartz64-a.dts   | 35 ++++++++++++++++++-
>  1 file changed, 34 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts b/arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts
> index a244f7b87e38..3a87c0240b30 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts
> @@ -58,6 +58,20 @@ led-diy {
>  		};
>  	};
>  
> +	rk817-sound {
> +		compatible = "simple-audio-card";
> +		simple-audio-card,format = "i2s";
> +		simple-audio-card,name = "Analog RK817";
> +		simple-audio-card,mclk-fs = <256>;
> +
> +		simple-audio-card,cpu {
> +			sound-dai = <&i2s1_8ch>;
> +		};
> +		simple-audio-card,codec {
> +			sound-dai = <&rk817>;
> +		};
> +	};
> +
>  	vcc12v_dcin: vcc12v_dcin {
>  		compatible = "regulator-fixed";
>  		regulator-name = "vcc12v_dcin";
> @@ -199,8 +213,13 @@ rk817: pmic@20 {
>  		interrupts = <RK_PA3 IRQ_TYPE_LEVEL_LOW>;
>  		clock-output-names = "rk808-clkout1", "rk808-clkout2";
>  
> +		#sound-dai-cells = <0>;
> +		clock-names = "mclk";
> +		clocks = <&cru I2S1_MCLKOUT_TX>;
> +		assigned-clocks = <&cru I2S1_MCLKOUT_TX>;
> +		assigned-clock-parents = <&cru CLK_I2S1_8CH_TX>;
>  		pinctrl-names = "default";
> -		pinctrl-0 = <&pmic_int_l>;
> +		pinctrl-0 = <&pmic_int_l>, <&i2s1m0_mclk>;
>  		rockchip,system-power-controller;
>  		wakeup-source;
>  		#clock-cells = <1>;
> @@ -389,9 +408,23 @@ regulator-state-mem {
>  				};
>  			};
>  		};
> +
> +		rk817_codec: codec {

This node should be optional and can probably be removed. It's only
used when there are extra parameters to pass to the codec (such as 
rockchip,mic-in-differential). Leaving it in shouldn't hurt anything
though.

> +		};
> +
>  	};
>  };
>  
> +&i2s1_8ch {
> +	status = "okay";
> +	rockchip,trcm-sync-tx-only;
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&i2s1m0_sclktx
> +		     &i2s1m0_lrcktx
> +		     &i2s1m0_sdi0
> +		     &i2s1m0_sdo0>;
> +};
> +
>  &mdio1 {
>  	rgmii_phy1: ethernet-phy@0 {
>  		compatible = "ethernet-phy-ieee802.3-c22";
> -- 
> 2.33.0
>