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platform: Add ARM64 platform directory

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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.

This commit introduces a new platform/arm64 subdirectory to give a
place to such drivers for EC-like devices.

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 Järvinen) with additional review from Bryan
O'Donoghue to represent ARM64 maintainers.

Signed-off-by: Nikita Travkin <nikita@trvn.ru>
Acked-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20240315-aspire1-ec-v5-2-f93381deff39@trvn.ru
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Nikita Travkin 2024-03-15 18:51:16 +05:00 committed by Hans de Goede
parent 6c4d24d60e
commit 363c8aea25
5 changed files with 38 additions and 0 deletions
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10
MAINTAINERS
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@ -3051,6 +3051,16 @@ F: drivers/mmc/host/sdhci-of-arasan.c
N: zynq
N: xilinx
ARM64 PLATFORM DRIVERS
M: Hans de Goede <hdegoede@redhat.com>
M: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
R: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
L: platform-driver-x86@vger.kernel.org
S: Maintained
Q: https://patchwork.kernel.org/project/platform-driver-x86/list/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git
F: drivers/platform/arm64/
ARM64 PORT (AARCH64 ARCHITECTURE)
M: Catalin Marinas <catalin.marinas@arm.com>
M: Will Deacon <will@kernel.org>

2
drivers/platform/Kconfig
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@ -14,3 +14,5 @@ source "drivers/platform/olpc/Kconfig"
source "drivers/platform/surface/Kconfig"
source "drivers/platform/x86/Kconfig"
source "drivers/platform/arm64/Kconfig"

1
drivers/platform/Makefile
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@ -11,3 +11,4 @@ obj-$(CONFIG_OLPC_EC) += olpc/
obj-$(CONFIG_GOLDFISH) += goldfish/
obj-$(CONFIG_CHROME_PLATFORMS) += chrome/
obj-$(CONFIG_SURFACE_PLATFORMS) += surface/
obj-$(CONFIG_ARM64) += arm64/

19
drivers/platform/arm64/Kconfig Normal file
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@ -0,0 +1,19 @@
# SPDX-License-Identifier: GPL-2.0-only
#
# EC-like Drivers for aarch64 based devices.
#
menuconfig ARM64_PLATFORM_DEVICES
bool "ARM64 Platform-Specific Device Drivers"
depends on ARM64 || COMPILE_TEST
default y
help
Say Y here to get to see options for platform-specific device drivers
for arm64 based devices, primarily EC-like device drivers.
This option alone does not add any kernel code.
If you say N, all options in this submenu will be skipped and disabled.
if ARM64_PLATFORM_DEVICES
endif # ARM64_PLATFORM_DEVICES

6
drivers/platform/arm64/Makefile Normal file
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@ -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.
#