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From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= <ilpo.jarvinen@linux.intel.com>
Date: Mon, 18 Mar 2024 13:31:40 +0200 (EET)
To: Nikita Travkin <nikita@trvn.ru>
cc: Hans de Goede <hdegoede@redhat.com>, Sebastian Reichel <sre@kernel.org>, 
    Rob Herring <robh+dt@kernel.org>, 
    Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, 
    Conor Dooley <conor+dt@kernel.org>, cros-qcom-dts-watchers@chromium.org, 
    Andy Gross <agross@kernel.org>, Bjorn Andersson <andersson@kernel.org>, 
    Konrad Dybcio <konrad.dybcio@linaro.org>, Rob Herring <robh@kernel.org>, 
    Bryan O'Donoghue <bryan.odonoghue@linaro.org>, devicetree@vger.kernel.org, 
    LKML <linux-kernel@vger.kernel.org>, linux-arm-msm@vger.kernel.org, 
    platform-driver-x86@vger.kernel.org
Subject: Re: [PATCH v5 2/4] platform: Add ARM64 platform directory
In-Reply-To: <20240315-aspire1-ec-v5-2-f93381deff39@trvn.ru>
Message-ID: <0634bc80-f149-e75a-40fa-03841d8e9161@linux.intel.com>
References: <20240315-aspire1-ec-v5-0-f93381deff39@trvn.ru> <20240315-aspire1-ec-v5-2-f93381deff39@trvn.ru>
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On Fri, 15 Mar 2024, Nikita Travkin wrote:

> Some ARM64 based laptops and computers require vendor/board specific
> drivers for their embedded controllers. Even though usually the most
> important functionality of those devices is implemented inside ACPI,
> unfortunately Linux doesn't currently have great support for ACPI on
> platforms like Qualcomm Snapdragon that are used in most ARM64 laptops
> today. Instead Linux relies on Device Tree for Qualcomm based devices
> and it's significantly easier to reimplement the EC functionality in
> a dedicated driver than to make use of ACPI code.
>=20
> This commit introduces a new platform/arm64 subdirectory to give a
> place to such drivers for EC-like devices.
>=20
> A new MAINTAINERS entry is added for this directory. Patches to files in
> this directory will be taken up by the platform-drivers-x86 team (i.e.
> Hans de Goede and Ilpo J=C3=A4rvinen) with additional review from Bryan
> O'Donoghue to represent ARM64 maintainers.
>=20
> Signed-off-by: Nikita Travkin <nikita@trvn.ru>

Acked-by: Ilpo J=C3=A4rvinen <ilpo.jarvinen@linux.intel.com>

And big thanks for Bryan for volunteering!

--=20
 i.

> ---
>  MAINTAINERS                     | 10 ++++++++++
>  drivers/platform/Kconfig        |  2 ++
>  drivers/platform/Makefile       |  1 +
>  drivers/platform/arm64/Kconfig  | 19 +++++++++++++++++++
>  drivers/platform/arm64/Makefile |  6 ++++++
>  5 files changed, 38 insertions(+)
>=20
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 76b3714710c2..186338451099 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -3050,6 +3050,16 @@ F:=09drivers/mmc/host/sdhci-of-arasan.c
>  N:=09zynq
>  N:=09xilinx
> =20
> +ARM64 PLATFORM DRIVERS
> +M:=09Hans de Goede <hdegoede@redhat.com>
> +M:=09Ilpo J=C3=A4rvinen <ilpo.jarvinen@linux.intel.com>
> +R:=09Bryan O'Donoghue <bryan.odonoghue@linaro.org>
> +L:=09platform-driver-x86@vger.kernel.org
> +S:=09Maintained
> +Q:=09https://patchwork.kernel.org/project/platform-driver-x86/list/
> +T:=09git git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-dr=
ivers-x86.git
> +F:=09drivers/platform/arm64/
> +
>  ARM64 PORT (AARCH64 ARCHITECTURE)
>  M:=09Catalin Marinas <catalin.marinas@arm.com>
>  M:=09Will Deacon <will@kernel.org>
> diff --git a/drivers/platform/Kconfig b/drivers/platform/Kconfig
> index 868b20361769..81a298517df2 100644
> --- a/drivers/platform/Kconfig
> +++ b/drivers/platform/Kconfig
> @@ -14,3 +14,5 @@ source "drivers/platform/olpc/Kconfig"
>  source "drivers/platform/surface/Kconfig"
> =20
>  source "drivers/platform/x86/Kconfig"
> +
> +source "drivers/platform/arm64/Kconfig"
> diff --git a/drivers/platform/Makefile b/drivers/platform/Makefile
> index 41640172975a..fbbe4f77aa5d 100644
> --- a/drivers/platform/Makefile
> +++ b/drivers/platform/Makefile
> @@ -11,3 +11,4 @@ obj-$(CONFIG_OLPC_EC)=09=09+=3D olpc/
>  obj-$(CONFIG_GOLDFISH)=09=09+=3D goldfish/
>  obj-$(CONFIG_CHROME_PLATFORMS)=09+=3D chrome/
>  obj-$(CONFIG_SURFACE_PLATFORMS)=09+=3D surface/
> +obj-$(CONFIG_ARM64)=09=09+=3D arm64/
> diff --git a/drivers/platform/arm64/Kconfig b/drivers/platform/arm64/Kcon=
fig
> new file mode 100644
> index 000000000000..644b83ede093
> --- /dev/null
> +++ b/drivers/platform/arm64/Kconfig
> @@ -0,0 +1,19 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +#
> +# EC-like Drivers for aarch64 based devices.
> +#
> +
> +menuconfig ARM64_PLATFORM_DEVICES
> +=09bool "ARM64 Platform-Specific Device Drivers"
> +=09depends on ARM64 || COMPILE_TEST
> +=09default y
> +=09help
> +=09  Say Y here to get to see options for platform-specific device drive=
rs
> +=09  for arm64 based devices, primarily EC-like device drivers.
> +=09  This option alone does not add any kernel code.
> +
> +=09  If you say N, all options in this submenu will be skipped and disab=
led.
> +
> +if ARM64_PLATFORM_DEVICES
> +
> +endif # ARM64_PLATFORM_DEVICES
> diff --git a/drivers/platform/arm64/Makefile b/drivers/platform/arm64/Mak=
efile
> new file mode 100644
> index 000000000000..f91cdc7155e2
> --- /dev/null
> +++ b/drivers/platform/arm64/Makefile
> @@ -0,0 +1,6 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +#
> +# Makefile for linux/drivers/platform/arm64
> +#
> +# This dir should only include drivers for EC-like devices.
> +#
>=20
>=20
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