Re: [PATCH 06/17] ARM: dts: Add missing slimbus node and binding for omap4

[Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>]

On Wed, Aug 30, 2017 at 08:19:42AM -0700, Tony Lindgren wrote:
> On omap4 we're missing the slimbus node and it's related
> "ti,hwmods" property that the SoC interconnect code needs.
> 
> Note that this will only show up as a bug with "doesn't have
> mpu register target base" boot errors when the legacy platform
> data is removed.
> 
> Let's also add the missing slimbus device tree binding
> documentation while at it.
> 
> Cc: Liam Girdwood <lgirdwood-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> Cc: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
> Cc: Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>
> Cc: Peter Ujfalusi <peter.ujfalusi-l0cyMroinI0@public.gmane.org>
> Cc: Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
> Signed-off-by: Tony Lindgren <tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>
> ---
>  .../devicetree/bindings/sound/ti-slimbus.txt       | 34 ++++++++++++++++++++++
>  arch/arm/boot/dts/omap4.dtsi                       | 17 +++++++++++
>  2 files changed, 51 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/sound/ti-slimbus.txt
> 
> diff --git a/Documentation/devicetree/bindings/sound/ti-slimbus.txt b/Documentation/devicetree/bindings/sound/ti-slimbus.txt
> new file mode 100644
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/ti-slimbus.txt
> @@ -0,0 +1,34 @@
> +Texas Instruments Serial Low-power Inter-chip Media Bus (SLIMbus) binding
> +
> +SLIMbus is used for communication between digital audio components and the SoC.
> +
> +
> +Required properties:
> +
> +compatible: Shall be one of the following:
> +	    "ti,omap4-slimbus"
> +
> +reg: Shall contain the device instance IO range

If there's more than 1, you need to state how many.

> +
> +interrupts: Shall contain the device instance interrupt
> +
> +
> +Optional properties:
> +
> +reg-names: Shall contain the IO range names if multiple IO
> +	   ranges are used by the SoC

Need to define what the names are.

> +
> +ti,hwmods: Shall contain the TI interconnect module name if needed
> +	   by the SoC
> +
> +
> +Example:
> +
> +	slimbus1: slimbus@4012c000 {
> +		compatible = "ti,omap4-slimbus";
> +		reg = <0x4012c000 0x400>, /* MPU private access */
> +		      <0x4902c000 0x400>; /* L3 Interconnect */
> +		reg-names = "mpu", "dma";
> +		interrupts = <GIC_SPI 97 IRQ_TYPE_LEVEL_HIGH>;
> +		ti,hwmods = "slimbus1";
> +	};
> diff --git a/arch/arm/boot/dts/omap4.dtsi b/arch/arm/boot/dts/omap4.dtsi
> --- a/arch/arm/boot/dts/omap4.dtsi
> +++ b/arch/arm/boot/dts/omap4.dtsi
> @@ -382,6 +382,14 @@
>  			#interrupt-cells = <2>;
>  		};
>  
> +		slimbus2: slimbus@48076000 {
> +			compatible = "ti,omap4-slimbus";
> +			reg = <0x48076000 0x400>;
> +			reg-names = "mpu";
> +			interrupts = <GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH>;
> +			ti,hwmods = "slimbus2";
> +		};
> +
>  		elm: elm@48078000 {
>  			compatible = "ti,am3352-elm";
>  			reg = <0x48078000 0x2000>;
> @@ -711,6 +719,15 @@
>  			status = "disabled";
>  		};
>  
> +		slimbus1: slimbus@4012c000 {
> +			compatible = "ti,omap4-slimbus";
> +			reg = <0x4012c000 0x400>, /* MPU private access */
> +			      <0x4902c000 0x400>; /* L3 Interconnect */
> +			reg-names = "mpu", "dma";
> +			interrupts = <GIC_SPI 97 IRQ_TYPE_LEVEL_HIGH>;
> +			ti,hwmods = "slimbus1";
> +		};
> +
>  		mcbsp4: mcbsp@48096000 {
>  			compatible = "ti,omap4-mcbsp";
>  			reg = <0x48096000 0xff>; /* L4 Interconnect */
> -- 
> 2.14.1
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