linux-kernel - Re: [PATCH v2 3/5] ARM: dts: AM33xx-l4: Update PRUSS interconnect target-module node

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Date:   Fri, 28 Feb 2020 10:33:28 +0200
From:   Roger Quadros <rogerq@...com>
To:     Suman Anna <s-anna@...com>, Tony Lindgren <tony@...mide.com>
CC:     Tero Kristo <t-kristo@...com>, <linux-omap@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>
Subject: Re: [PATCH v2 3/5] ARM: dts: AM33xx-l4: Update PRUSS interconnect
 target-module node



On 28/02/2020 00:28, Suman Anna wrote:
> The PRU-ICSS present on some AM33xx SoCs has a very unique SYSC
> register. The IP also uses a hard-reset line, and requires this
> PRCM reset to be deasserted to be able to access any registers.
> Update the existing PRUSS interconnect target-module with all
> the required properties.
> 
> The PRUSS device itself shall be added as a child node to this
> interconnect node in the future. PRU-ICSS is not supported on
> AM3351/AM3352/AM3354 SoCs though in the AM33xx family, so the
> target module node should be disabled in derivative board files
> that use any of these SoCs.
> 
> Signed-off-by: Suman Anna <s-anna@...com>

Reviewed-by: Roger Quadros <rogerq@...com>

> ---
> v2: Revise patch description, no code changes
> 
>   arch/arm/boot/dts/am33xx-l4.dtsi | 21 ++++++++++++++++++---
>   1 file changed, 18 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/am33xx-l4.dtsi b/arch/arm/boot/dts/am33xx-l4.dtsi
> index 4e2986f0c604..5ed7f3c58c0f 100644
> --- a/arch/arm/boot/dts/am33xx-l4.dtsi
> +++ b/arch/arm/boot/dts/am33xx-l4.dtsi
> @@ -759,12 +759,27 @@
>   			ranges = <0x0 0x200000 0x80000>;
>   		};
>   
> -		target-module@...000 {			/* 0x4a300000, ap 9 04.0 */
> -			compatible = "ti,sysc";
> -			status = "disabled";
> +		pruss_tm: target-module@...000 {	/* 0x4a300000, ap 9 04.0 */
> +			compatible = "ti,sysc-pruss", "ti,sysc";
> +			reg = <0x326000 0x4>,
> +			      <0x326004 0x4>;
> +			reg-names = "rev", "sysc";
> +			ti,sysc-mask = <(SYSC_PRUSS_STANDBY_INIT |
> +					 SYSC_PRUSS_SUB_MWAIT)>;
> +			ti,sysc-midle = <SYSC_IDLE_FORCE>,
> +					<SYSC_IDLE_NO>,
> +					<SYSC_IDLE_SMART>;
> +			ti,sysc-sidle = <SYSC_IDLE_FORCE>,
> +					<SYSC_IDLE_NO>,
> +					<SYSC_IDLE_SMART>;
> +			clocks = <&pruss_ocp_clkctrl AM3_PRUSS_OCP_PRUSS_CLKCTRL 0>;
> +			clock-names = "fck";
> +			resets = <&prm_per 1>;
> +			reset-names = "rstctrl";
>   			#address-cells = <1>;
>   			#size-cells = <1>;
>   			ranges = <0x0 0x300000 0x80000>;
> +			status = "disabled";
>   		};
>   	};
>   };
> 

-- 
cheers,
-roger
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
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