Re: [PATCH 17/17] arm64: dts: apple: t8112: Initial t8112 (M2) device trees

[Krzysztof Kozlowski]

On 12/02/2023 16:41, Janne Grunau wrote:
> From: Hector Martin <marcan@xxxxxxxxx>
> 
> This adds device trees for the following devices:
>  - Macbook Air (M2, 2022)
>  - Macbook Pro 13" (M2, 2022)
>  - Mac mini (M2, 2023)
> 
> Signed-off-by: Hector Martin <marcan@xxxxxxxxx>
> Co-developed-by: Janne Grunau <j@xxxxxxxxxx>
> Signed-off-by: Janne Grunau <j@xxxxxxxxxx>
> ---
>  arch/arm64/boot/dts/apple/Makefile        |    3 +
>  arch/arm64/boot/dts/apple/t8112-j413.dts  |   71 ++
>  arch/arm64/boot/dts/apple/t8112-j473.dts  |   60 ++
>  arch/arm64/boot/dts/apple/t8112-j493.dts  |   60 ++
>  arch/arm64/boot/dts/apple/t8112-jxxx.dtsi |   81 ++
>  arch/arm64/boot/dts/apple/t8112-pmgr.dtsi | 1141 +++++++++++++++++++++++++++++
>  arch/arm64/boot/dts/apple/t8112.dtsi      |  904 +++++++++++++++++++++++
>  7 files changed, 2320 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/apple/Makefile b/arch/arm64/boot/dts/apple/Makefile
> index 5a7506ff5ea3..aec5e29cdfb7 100644
> --- a/arch/arm64/boot/dts/apple/Makefile
> +++ b/arch/arm64/boot/dts/apple/Makefile
> @@ -10,3 +10,6 @@ dtb-$(CONFIG_ARCH_APPLE) += t6000-j316s.dtb
>  dtb-$(CONFIG_ARCH_APPLE) += t6001-j316c.dtb
>  dtb-$(CONFIG_ARCH_APPLE) += t6001-j375c.dtb
>  dtb-$(CONFIG_ARCH_APPLE) += t6002-j375d.dtb
> +dtb-$(CONFIG_ARCH_APPLE) += t8112-j413.dtb
> +dtb-$(CONFIG_ARCH_APPLE) += t8112-j473.dtb
> +dtb-$(CONFIG_ARCH_APPLE) += t8112-j493.dtb
> diff --git a/arch/arm64/boot/dts/apple/t8112-j413.dts b/arch/arm64/boot/dts/apple/t8112-j413.dts
> new file mode 100644
> index 000000000000..0e5b5add92cf
> --- /dev/null
> +++ b/arch/arm64/boot/dts/apple/t8112-j413.dts
> @@ -0,0 +1,71 @@
> +// SPDX-License-Identifier: GPL-2.0+ OR MIT
> +/*
> + * Apple MacBook Air (M2, 2022)
> + *
> + * target-type: J413
> + *
> + * Copyright The Asahi Linux Contributors
> + */
> +
> +/dts-v1/;
> +
> +#include "t8112.dtsi"
> +#include "t8112-jxxx.dtsi"
> +
> +/ {
> +	compatible = "apple,j413", "apple,t8112", "apple,arm-platform";
> +	model = "Apple MacBook Air (13-inch, M2, 2022)";
> +
> +	aliases {
> +		bluetooth0 = &bluetooth0;
> +		wifi0 = &wifi0;
> +	};
> +};
> +
> +/*
> + * Force the bus number assignments so that we can declare some of the
> + * on-board devices and properties that are populated by the bootloader
> + * (such as MAC addresses).
> + */
> +&port00 {
> +	bus-range = <1 1>;
> +	wifi0: wifi@0,0 {
> +		compatible = "pci14e4,4433";
> +		reg = <0x10000 0x0 0x0 0x0 0x0>;
> +		/* To be filled by the loader */
> +		local-mac-address = [00 10 18 00 00 10];
> +		apple,antenna-sku = "XX";
> +		brcm,board-type = "apple,hokkaido";
> +	};
> +
> +	bluetooth0: bluetooth@0,1 {
> +		compatible = "pci14e4,5f71";
> +		reg = <0x10100 0x0 0x0 0x0 0x0>;
> +		/* To be filled by the loader */
> +		local-bd-address = [00 00 00 00 00 00];
> +		brcm,board-type = "apple,hokkaido";
> +	};
> +};
> +
> +/*
> + * Remove unused PCIe ports
> + */
> +
> +/delete-node/ &port01;

You should not delete devices just because they are unused. Externally
visible buses should be just disabled in DTSI and you enable them when
needed. Not the opposite way.

What's more, you must node delete nodes just because they are "not
used". This not anymore proper description of hardware.

> +/delete-node/ &port02;
> +/delete-node/ &port03;
> +
> +&i2c0 {
> +	/* MagSafe port */
> +	hpm5: usb-pd@3a {
> +		compatible = "apple,cd321x";
> +		reg = <0x3a>;
> +		interrupt-parent = <&pinctrl_ap>;
> +		interrupts = <8 IRQ_TYPE_LEVEL_LOW>;
> +		interrupt-names = "irq";
> +	};
> +};
> +
> +&i2c4 {
> +	status = "okay";
> +};
> diff --git a/arch/arm64/boot/dts/apple/t8112-j473.dts b/arch/arm64/boot/dts/apple/t8112-j473.dts
> new file mode 100644
> index 000000000000..55950d0a73c5
> --- /dev/null
> +++ b/arch/arm64/boot/dts/apple/t8112-j473.dts
> @@ -0,0 +1,60 @@
> +// SPDX-License-Identifier: GPL-2.0+ OR MIT
> +/*
> + * Apple Mac mini (M2, 2023)
> + *
> + * target-type: J473
> + *
> + * Copyright The Asahi Linux Contributors
> + */
> +
> +/dts-v1/;

(....)


> +
> +	ps_debug_switch: power-controller@b8 {
> +		compatible = "apple,t8112-pmgr-pwrstate", "apple,pmgr-pwrstate";
> +		reg = <0xb8 4>;
> +		#power-domain-cells = <0>;
> +		#reset-cells = <0>;
> +		label = "debug_switch";
> +		apple,always-on; /* Core AON device */
> +	};
> +};
> +
> diff --git a/arch/arm64/boot/dts/apple/t8112.dtsi b/arch/arm64/boot/dts/apple/t8112.dtsi
> new file mode 100644
> index 000000000000..974443913f6a
> --- /dev/null
> +++ b/arch/arm64/boot/dts/apple/t8112.dtsi
> @@ -0,0 +1,904 @@
> +// SPDX-License-Identifier: GPL-2.0+ OR MIT
> +/*
> + * Apple T8112 "M2" SoC
> + *
> + * Other names: H14G
> + *
> + * Copyright The Asahi Linux Contributors
> + */


(...)

> +
> +		aic: interrupt-controller@23b0c0000 {
> +			compatible = "apple,t8112-aic", "apple,aic2";
> +			#interrupt-cells = <3>;
> +			interrupt-controller;
> +			reg = <0x2 0x3b0c0000 0x0 0x8000>,
> +				<0x2 0x3b0c8000 0x0 0x4>;
> +			reg-names = "core", "event";
> +			power-domains = <&ps_aic>;
> +
> +			affinities {
> +				e-core-pmu-affinity {
> +					apple,fiq-index = <AIC_CPU_PMU_E>;
> +					cpus = <&cpu_e0 &cpu_e1 &cpu_e2 &cpu_e3>;
> +				};
> +
> +				p-core-pmu-affinity {
> +					apple,fiq-index = <AIC_CPU_PMU_P>;
> +					cpus = <&cpu_p0 &cpu_p1 &cpu_p2 &cpu_p3>;
> +				};
> +			};
> +		};
> +
> +		pmgr: power-management@23b700000 {
> +			compatible = "apple,t8112-pmgr", "apple,pmgr", "syscon", "simple-mfd";

Why this is simple-mfd?

> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +			reg = <0x2 0x3b700000 0 0x14000>;
> +		};


> +
> +		pmgr_mini: power-management@23d280000 {
> +			compatible = "apple,t8112-pmgr", "apple,pmgr", "syscon", "simple-mfd";

Why this is simple-mfd?

> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +			reg = <0x2 0x3d280000 0 0x4000>;
> +		};



Best regards,
Krzysztof