linux-kernel - Re: [PATCH v2 5/6] ARM: dts: Add generic interconnect target module node for MCAN

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Date:   Wed, 30 May 2018 08:04:02 -0700
From:   Tony Lindgren <tony@...mide.com>
To:     Faiz Abbas <faiz_abbas@...com>
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-clk@...r.kernel.org, robh+dt@...nel.org,
        bcousson@...libre.com, paul@...an.com, t-kristo@...com
Subject: Re: [PATCH v2 5/6] ARM: dts: Add generic interconnect target module
 node for MCAN

* Faiz Abbas <faiz_abbas@...com> [180530 14:12]:
> The ti-sysc driver provides support for manipulating the idlemodes
> and interconnect level resets.
...
> --- a/arch/arm/boot/dts/dra76x.dtsi
> +++ b/arch/arm/boot/dts/dra76x.dtsi
> @@ -11,6 +11,25 @@
>  / {
>  	compatible = "ti,dra762", "ti,dra7";
>  
> +	ocp {
> +
> +		target-module@...2c00000 {
> +			compatible = "ti,sysc-dra7-mcan";
> +			ranges = <0x0 0x42c00000 0x2000>;
> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +			reg = <0x42c01900 0x4>,
> +			      <0x42c01904 0x4>,
> +			      <0x42c01908 0x4>;
> +			reg-names = "rev", "sysc", "syss";
> +			ti,sysc-mask = <(SYSC_OMAP4_SOFTRESET |
> +					 SYSC_DRA7_MCAN_ENAWAKEUP)>;
> +			ti,syss-mask = <1>;
> +			clocks = <&wkupaon_clkctrl DRA7_ADC_CLKCTRL 0>;
> +			clock-names = "fck";
> +		};
> +	};
> +
>  };

Looks good to me except I think the reset won't do anything currently
with ti-sysc.c unless you specfify also "ti,hwmods" for the module?

Can you please check? It might be worth adding the reset function to
ti-sysc.c for non "ti,hwmods" case and that just might remove the
need for any hwmod code for this module.

Regards,

Tony