qemu_arm_versatile: switch to in-kernel defconfig + fragment

This platform has its own kernel defconfig in Buildroot, but we cannot
get quick idea about how much it diverged from the in-kernel defconfig.

Let's use the upstream arch/arm/config/versatile_defconfig as a base,
and maintain the diff as a merge-config fragment. The same .config is
still generated (based on the 5.10.7 kernel).

The diff is quite big, but this is a good start-point for cleanups.
Follow-up works can drop diff lines unless we find a good reason for
divergence.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
[Arnout: rename linux.config to linux.fragment]
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

board/qemu/arm-versatile/linux.config

@@ -1,43 +0,0 @@
-CONFIG_SYSVIPC=y
-CONFIG_MODULES=y
-CONFIG_MODULE_UNLOAD=y
-# CONFIG_ARCH_MULTI_V7 is not set
-CONFIG_ARCH_VERSATILE=y
-CONFIG_PCI=y
-CONFIG_PCI_VERSATILE=y
-CONFIG_AEABI=y
-CONFIG_NET=y
-CONFIG_PACKET=y
-CONFIG_UNIX=y
-CONFIG_INET=y
-CONFIG_SCSI=y
-CONFIG_BLK_DEV_SD=y
-CONFIG_SCSI_SYM53C8XX_2=y
-CONFIG_NETDEVICES=y
-CONFIG_8139CP=y
-CONFIG_PHYLIB=y
-CONFIG_INPUT_EVDEV=y
-CONFIG_SERIO_AMBAKMI=y
-CONFIG_LEGACY_PTY_COUNT=16
-CONFIG_SERIAL_8250=m
-CONFIG_SERIAL_8250_EXTENDED=y
-CONFIG_SERIAL_8250_MANY_PORTS=y
-CONFIG_SERIAL_8250_SHARE_IRQ=y
-CONFIG_SERIAL_8250_RSA=y
-CONFIG_SERIAL_AMBA_PL011=y
-CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
-CONFIG_I2C=y
-CONFIG_I2C_CHARDEV=m
-CONFIG_FB=y
-CONFIG_FB_ARMCLCD=y
-CONFIG_FRAMEBUFFER_CONSOLE=y
-CONFIG_SOUND=y
-CONFIG_SND=m
-CONFIG_SND_MIXER_OSS=m
-CONFIG_SND_PCM_OSS=m
-CONFIG_SND_ARMAACI=m
-CONFIG_EXT4_FS=y
-CONFIG_VFAT_FS=m
-CONFIG_TMPFS=y
-CONFIG_TMPFS_POSIX_ACL=y
-CONFIG_MAGIC_SYSRQ=y

board/qemu/arm-versatile/linux.fragment

@@ -0,0 +1,66 @@
+# CONFIG_BLK_DEV_INITRD is not set
+# CONFIG_BLK_DEV_RAM is not set
+# CONFIG_CMA is not set
+# CONFIG_CRAMFS is not set
+CONFIG_CMDLINE=""
+CONFIG_CRC16=y
+CONFIG_CRYPTO=y
+# CONFIG_DEBUG_FS is not set
+# CONFIG_DEBUG_KERNEL is not set
+# CONFIG_DEBUG_USER is not set
+CONFIG_DEVTMPFS=y
+# CONFIG_DRM is not set
+# CONFIG_EEPROM_LEGACY is not set
+# CONFIG_EXT2_FS is not set
+CONFIG_EXT4_FS=y
+CONFIG_FB_ARMCLCD=y
+# CONFIG_FONTS is not set
+CONFIG_FONT_8x16=y
+CONFIG_FONT_8x8=y
+# CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY is not set
+# CONFIG_FTRACE is not set
+# CONFIG_GPIOLIB is not set
+# CONFIG_HIGH_RES_TIMERS is not set
+CONFIG_HWMON=y
+CONFIG_HZ_PERIODIC=y
+# CONFIG_I2C_VERSATILE is not set
+CONFIG_INET_DIAG=y
+CONFIG_INPUT_EVDEV=y
+CONFIG_IPV6=y
+# CONFIG_IP_MULTICAST is not set
+# CONFIG_IP_PNP is not set
+CONFIG_LOCALVERSION_AUTO=y
+# CONFIG_LOGO is not set
+CONFIG_LOG_BUF_SHIFT=17
+CONFIG_MDIO_DEVICE=y
+# CONFIG_MINIX_FS is not set
+# CONFIG_MMC is not set
+# CONFIG_MTD is not set
+# CONFIG_NEW_LEDS is not set
+# CONFIG_NFSD is not set
+# CONFIG_NFS_FS is not set
+# CONFIG_NLS_CODEPAGE_850 is not set
+# CONFIG_NLS_ISO8859_1 is not set
+# CONFIG_NO_HZ_IDLE is not set
+# CONFIG_NVMEM is not set
+# CONFIG_OABI_COMPAT is not set
+# CONFIG_PARTITION_ADVANCED is not set
+CONFIG_PCI=y
+CONFIG_PCI_VERSATILE=y
+CONFIG_PHYLIB=y
+# CONFIG_ROMFS_FS is not set
+# CONFIG_RTC_CLASS is not set
+CONFIG_SCSI=y
+CONFIG_SCSI_SPI_ATTRS=y
+CONFIG_SCSI_SYM53C8XX_2=y
+CONFIG_SERIO_SERPORT=y
+CONFIG_SLUB=y
+# CONFIG_SPI is not set
+# CONFIG_SYNC_FILE is not set
+CONFIG_TMPFS=y
+CONFIG_TMPFS_POSIX_ACL=y
+CONFIG_TMPFS_XATTR=y
+# CONFIG_VFP is not set
+# CONFIG_XZ_DEC is not set
+CONFIG_8139CP=y
+CONFIG_BLK_DEV_SD=y

configs/qemu_arm_versatile_defconfig

@@ -21,8 +21,8 @@ BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_15=y
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.15"
-BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
-BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/qemu/arm-versatile/linux.config"
+BR2_LINUX_KERNEL_DEFCONFIG="versatile"
+BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="board/qemu/arm-versatile/linux.fragment"
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
 BR2_LINUX_KERNEL_INTREE_DTS_NAME="versatile-pb"