linux-kernel - Re: [PATCH 4/6] ARM: dts: s5pv210: aries: Add reserved memory for mfc

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Date:   Mon, 31 Dec 2018 12:44:30 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Paweł Chmiel <pawel.mikolaj.chmiel@...il.com>
Cc:     kgene@...nel.org, robh+dt@...nel.org, mark.rutland@....com,
        linux@...linux.org.uk, xc-racer2@...e.ca,
        linux-arm-kernel@...ts.infradead.org,
        "linux-samsung-soc@...r.kernel.org" 
        <linux-samsung-soc@...r.kernel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/6] ARM: dts: s5pv210: aries: Add reserved memory for mfc

On Fri, 28 Dec 2018 at 17:18, Paweł Chmiel
<pawel.mikolaj.chmiel@...il.com> wrote:
>
> This commit adds memory reservation required by MFC to run.
> On S5PV210 both regions needs to be on separate memory banks.
> Size of both regions is taken from stock sources.
>
> Signed-off-by: Paweł Chmiel <pawel.mikolaj.chmiel@...il.com>
> ---
>  arch/arm/boot/dts/s5pv210-aries.dtsi | 22 ++++++++++++++++++++++
>  1 file changed, 22 insertions(+)
>
> diff --git a/arch/arm/boot/dts/s5pv210-aries.dtsi b/arch/arm/boot/dts/s5pv210-aries.dtsi
> index 575094ea7024..35ba009a1a33 100644
> --- a/arch/arm/boot/dts/s5pv210-aries.dtsi
> +++ b/arch/arm/boot/dts/s5pv210-aries.dtsi
> @@ -23,6 +23,24 @@
>                         0x50000000 0x08000000>;
>         };
>
> +       reserved-memory {
> +               #address-cells = <1>;
> +               #size-cells = <1>;
> +               ranges;
> +
> +               mfc_left: region_mfc_left@...00000 {

Although you used the same naming convention as existing
exynos-mfc-reserved-memory.dtsi, the name of nodes should be generic,
so:
mfc_left: region@...00000

Best regards,
Krzysztof


> +                       compatible = "shared-dma-pool";
> +                       no-map;
> +                       reg = <0x43000000 0x2000000>;
> +               };
> +
> +               mfc_right: region_mfc_right@...00000 {
> +                       compatible = "shared-dma-pool";
> +                       no-map;
> +                       reg = <0x51000000 0x2000000>;
> +               };
> +       };
> +
>         wifi_pwrseq: wifi-pwrseq {
>                 compatible = "mmc-pwrseq-simple";
>                 reset-gpios = <&gpg1 2 GPIO_ACTIVE_LOW>;
> @@ -329,6 +347,10 @@
>         status = "okay";
>  };
>
> +&mfc {
> +       memory-region = <&mfc_left>, <&mfc_right>;
> +};
> +
>  &pinctrl0 {
>         wlan_bt_en: wlan-bt-en {
>                 samsung,pins = "gpb-5";
> --
> 2.17.1
>