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2f618d5ef5
It is possible to build MMU-less kernels for Cortex-M base microcrontrollers as well as a couple of older platforms that have not been converted to CONFIG_ARCH_MULTIPLATFORM, specifically ep93xx, footbridge, dove, sa1100 and s3c24xx. It seems unlikely that anybody has tested those configurations in recent years, as even building them is frequently broken. A patch I submitted caused another build time regression in this configuration. I sent a patch for that, but it seems better to also remove the option entirely, leaving ARMv7-M as the only supported Arm NOMMU target for simplicity. A couple of platforms have dependencies on CONFIG_MMU, those can all be removed now. Notably, mach-integrator tries to support MMU-less CPU cores, but those have not actually been selectable for a long time. This addresses several build failures in randconfig builds that have accumulated over the years. Cc: Vladimir Murzin <vladimir.murzin@arm.com> Cc: Russell King <linux@armlinux.org.uk> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
48 lines
1 KiB
Text
48 lines
1 KiB
Text
# SPDX-License-Identifier: GPL-2.0
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menuconfig ARCH_U8500
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bool "ST-Ericsson U8500 Series"
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depends on ARCH_MULTI_V7
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select AB8500_CORE
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select ABX500_CORE
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select ARM_AMBA
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select ARM_ERRATA_754322
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select ARM_ERRATA_764369 if SMP
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select ARM_GIC
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select CACHE_L2X0
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select CLKSRC_DBX500_PRCMU
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select CLKSRC_NOMADIK_MTU
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select GPIOLIB
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select HAVE_ARM_SCU if SMP
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select HAVE_ARM_TWD if SMP
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select I2C
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select I2C_NOMADIK
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select MFD_DB8500_PRCMU
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select PINCTRL
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select PINCTRL_AB8500
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select PINCTRL_AB8505
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select PINCTRL_ABX500
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select PINCTRL_DB8500
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select PINCTRL_NOMADIK
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select PL310_ERRATA_753970 if CACHE_L2X0
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select PM_GENERIC_DOMAINS if PM
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select REGULATOR
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select REGULATOR_DB8500_PRCMU
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select REGULATOR_FIXED_VOLTAGE
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select SOC_BUS
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select RESET_CONTROLLER
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help
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Support for ST-Ericsson's Ux500 architecture
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if ARCH_U8500
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config UX500_SOC_DB8500
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def_bool y
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config UX500_DEBUG_UART
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int "Ux500 UART to use for low-level debug"
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default 2
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help
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Choose the UART on which kernel low-level debug messages should be
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output.
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endif
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