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Subject: Re: [PATCH v4 3/3] arm64: dts: meson: Add minimal support for
 Odroid-N2
To:     khilman@baylibre.com
Cc:     linux-amlogic@lists.infradead.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
References: <20190527140206.30392-1-narmstrong@baylibre.com>
 <20190527140206.30392-4-narmstrong@baylibre.com>
From:   Neil Armstrong <narmstrong@baylibre.com>
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Organization: Baylibre
Message-ID: <7da1c182-db68-c813-1f3c-b936137deeb2@baylibre.com>
Date:   Wed, 29 May 2019 12:08:53 +0200
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On 27/05/2019 16:02, Neil Armstrong wrote:
> This patch adds basic support for :
> - Amlogic G12B, which is very similar to G12A
> - The HardKernel Odroid-N2 based on the S922X SoC
> 
> The Amlogic G12B SoC is very similar with the G12A SoC, sharing
> most of the features and architecture, but with these differences :
> - The first CPU cluster only has 2xCortex-A53 instead of 4
> - G12B has a second cluster of 4xCortex-A73
> - Both cluster can achieve 2GHz instead of 1,8GHz for G12A
> - CPU Clock architecture is difference, thus needing a different
>   compatible to handle this slight difference
> - Supports a MIPI CSI input
> - Embeds a Mali-G52 instead of a Mali-G31, but integration is the same
> 
> Actual support is done in the same way as for the GXM support, including
> the G12A dtsi and redefining the CPU clusters.
> Unlike GXM, the first cluster is different, thus needing to remove
> the last 2 cpu nodes of the first cluster.
> 
> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
> ---
>  arch/arm64/boot/dts/amlogic/Makefile          |   1 +
>  .../boot/dts/amlogic/meson-g12b-odroid-n2.dts | 288 ++++++++++++++++++
>  arch/arm64/boot/dts/amlogic/meson-g12b.dtsi   |  82 +++++
>  3 files changed, 371 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts
>  create mode 100644 arch/arm64/boot/dts/amlogic/meson-g12b.dtsi
> 
> diff --git a/arch/arm64/boot/dts/amlogic/Makefile b/arch/arm64/boot/dts/amlogic/Makefile
> index e129c03ced14..07b861fe5fa5 100644
> --- a/arch/arm64/boot/dts/amlogic/Makefile
> +++ b/arch/arm64/boot/dts/amlogic/Makefile
> @@ -3,6 +3,7 @@ dtb-$(CONFIG_ARCH_MESON) += meson-axg-s400.dtb
>  dtb-$(CONFIG_ARCH_MESON) += meson-g12a-sei510.dtb
>  dtb-$(CONFIG_ARCH_MESON) += meson-g12a-u200.dtb
>  dtb-$(CONFIG_ARCH_MESON) += meson-g12a-x96-max.dtb
> +dtb-$(CONFIG_ARCH_MESON) += meson-g12b-odroid-n2.dtb
>  dtb-$(CONFIG_ARCH_MESON) += meson-gxbb-nanopi-k2.dtb
>  dtb-$(CONFIG_ARCH_MESON) += meson-gxbb-nexbox-a95x.dtb
>  dtb-$(CONFIG_ARCH_MESON) += meson-gxbb-odroidc2.dtb
> diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts
> new file mode 100644
> index 000000000000..48783ead8dfb
> --- /dev/null
> +++ b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts
> @@ -0,0 +1,288 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (c) 2019 BayLibre, SAS
> + * Author: Neil Armstrong <narmstrong@baylibre.com>
> + */
> +
> +/dts-v1/;
> +

[...]

> +
> +	hub_5v: regulator-hub_5v {
> +		compatible = "regulator-fixed";
> +		regulator-name = "HUB_5V";
> +		regulator-min-microvolt = <5000000>;
> +		regulator-max-microvolt = <5000000>;
> +		vin-supply = <&vcc_5v>;
> +
> +		/* Connected to the Hub CHIPENABLE, LOW sets low power state */
> +		gpio = <&gpio GPIOH_5 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +	};
> +
> +	usb_pwr_en: regulator-usb_pwr_en {
> +		compatible = "regulator-fixed";
> +		regulator-name = "USB_PWR_EN";
> +		regulator-min-microvolt = <5000000>;
> +		regulator-max-microvolt = <5000000>;
> +		vin-supply = <&hub_5v>;
> +
> +		/* Connected to the microUSB port power enable */
> +		gpio = <&gpio GPIOH_6 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +	};
> +

[...]

> +
> +&usb {
> +	status = "okay";
> +	vbus-supply = <&usb_pwr_en>;
> +};
> +
> +&usb2_phy0 {
> +	phy-supply = <&vcc_5v>;
> +};
> +
> +&usb2_phy1 {
> +	phy-supply = <&vcc_5v>;
> +};

In fact, I need to fixup here :

usb2_phy1 needs &hub_5v and regulator-usb_pwr_en depends on &vcc_5v instead...

@Martin, can I still keep your reviewed-by for v5 ?

Neil

> diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12b.dtsi
> new file mode 100644
> index 000000000000..9e88e513b22d
> --- /dev/null
> +++ b/arch/arm64/boot/dts/amlogic/meson-g12b.dtsi
> @@ -0,0 +1,82 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)

[...]

> +		};
> +	};
> +};
> +
> +&clkc {
> +	compatible = "amlogic,g12b-clkc";
> +};
>