linux-kernel - Re: [PATCH v7 08/12] arm: dts: s5pv210: Add node for SGX 540

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Date:   Sun, 26 Apr 2020 14:56:47 +0200
From:   Paul Cercueil <paul@...pouillou.net>
To:     "H. Nikolaus Schaller" <hns@...delico.com>
Cc:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Benoît Cousson <bcousson@...libre.com>,
        Tony Lindgren <tony@...mide.com>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paulburton@...nel.org>,
        James Hogan <jhogan@...nel.org>, Kukjin Kim <kgene@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Jonathan Bakker <xc-racer2@...e.ca>,
        Philipp Rossak <embed3d@...il.com>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
        openpvrsgx-devgroup@...ux.org, letux-kernel@...nphoenux.org,
        kernel@...a-handheld.com, linux-mips@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org
Subject: Re: [PATCH v7 08/12] arm: dts: s5pv210: Add node for SGX 540



Le ven. 24 avril 2020 à 22:34, H. Nikolaus Schaller 
<hns@...delico.com> a écrit :
> From: Jonathan Bakker <xc-racer2@...e.ca>
> 
> All s5pv210 devices have a PowerVR SGX 540 (revision 120) attached.
> 
> There is no external regulator for it so it can be enabled by default.
> 
> Signed-off-by: Jonathan Bakker <xc-racer2@...e.ca>
> Signed-off-by: H. Nikolaus Schaller <hns@...delico.com>
> ---
>  arch/arm/boot/dts/s5pv210.dtsi | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/s5pv210.dtsi 
> b/arch/arm/boot/dts/s5pv210.dtsi
> index 2ad642f51fd9..abbdda205c1b 100644
> --- a/arch/arm/boot/dts/s5pv210.dtsi
> +++ b/arch/arm/boot/dts/s5pv210.dtsi
> @@ -512,6 +512,19 @@ vic3: interrupt-controller@...00000 {
>  			#interrupt-cells = <1>;
>  		};
> 
> +		gpu: gpu@...00000 {
> +			compatible = "samsung,s5pv210-sgx540-120";
> +			reg = <0xf3000000 0x10000>;
> +			interrupt-parent = <&vic2>;
> +			interrupts = <10>;
> +			clock-names = "core";
> +			clocks = <&clocks CLK_G3D>;
> +
> +			assigned-clocks = <&clocks MOUT_G3D>, <&clocks DOUT_G3D>;
> +			assigned-clock-rates = <0>, <66700000>;
> +			assigned-clock-parents = <&clocks MOUT_MPLL>;

What are these clocks for, and why are they reparented / reclocked?

Shouldn't they be passed to 'clocks' as well?

-Paul

> +		};
> +
>  		fimd: fimd@...00000 {
>  			compatible = "samsung,s5pv210-fimd";
>  			interrupt-parent = <&vic2>;
> --
> 2.25.1
>