CONFIG_ARCH_AT91 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
AT91/Microchip SoCs
configname: CONFIG_ARCH_AT91
Linux Kernel Configuration
└─>AT91/Microchip SoCs
In linux kernel since version 2.6.18 (release Date: 2006-09-19)
is selected by
CONFIG_SOC_SAMV7CONFIG_SOC_SAMA5D2
CONFIG_SOC_SAMA5D3
CONFIG_SOC_SAMA5D4
CONFIG_SOC_SAMA7G5
CONFIG_SOC_LAN966
CONFIG_SOC_AT91RM9200
CONFIG_SOC_AT91SAM9
CONFIG_SOC_SAM9X60
CONFIG_SOC_SAM9X7
CONFIG_ATMEL_CLOCKSOURCE_PIT
CONFIG_ATMEL_CLOCKSOURCE_TCB
CONFIG_MICROCHIP_CLOCKSOURCE_PIT64B
CONFIG_COMMON_CLK_AT91
CONFIG_SOC_SAMA5
CONFIG_ATMEL_SECURE_PM
CONFIG_SOC_SAMA7
CONFIG_CRYPTO_DEV_ATMEL_SHA
CONFIG_MCHP_EIC