Add the ARCH_MICROCHIP top-level symbol so subsequent peripheral
driver patches (atmel serial, atmel-sdhci, atmel-quadspi, ...) can
gain ARCH_MICROCHIP as a build dependency.

This SoC architecture covers Microchip's ARM64 switch SoCs, starting
with the LAN969X family. ARM32 Microchip/Atmel SoCs (AT91, SAMA5)
continue to use ARCH_AT91.

Signed-off-by: Oleksij Rempel <[email protected]>
---
 arch/arm/Kconfig | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index cb6652001546..5fdec7159827 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -265,6 +265,20 @@ config ARCH_ZYNQMP
        select GPIOLIB
        select HAS_MACB
 
+config ARCH_MICROCHIP
+       bool "Microchip ARM64 SoC support"
+       depends on ARCH_MULTIARCH
+       depends on 64BIT
+       select OFDEVICE
+       select COMMON_CLK_OF_PROVIDER
+       select PINCTRL
+       select GPIOLIB
+       help
+         This enables support for Microchip ARM64-based SoCs,
+         including the LAN969X Ethernet switch family.
+
+         For ARM32 Microchip/Atmel SoCs (AT91, SAMA5), use ARCH_AT91.
+
 source "arch/arm/cpu/Kconfig"
 source "arch/arm/mach-at91/Kconfig"
 source "arch/arm/mach-bcm283x/Kconfig"
-- 
2.47.3


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