Shrink the kernel featureset to only what the businesscard needs

board/businesscard/v1/linux_defconfig

@@ -1,42 +1,28 @@
 CONFIG_LOCALVERSION="-licheepi-nano"
 # CONFIG_LOCALVERSION_AUTO is not set
+# CONFIG_SWAP is not set
 CONFIG_NO_HZ=y
 CONFIG_HIGH_RES_TIMERS=y
-CONFIG_CGROUPS=y
-CONFIG_BLK_DEV_INITRD=y
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+CONFIG_EXPERT=y
+# CONFIG_MULTIUSER is not set
+# CONFIG_SYSFS_SYSCALL is not set
+# CONFIG_KALLSYMS is not set
+# CONFIG_AIO is not set
 CONFIG_PERF_EVENTS=y
+# CONFIG_VM_EVENT_COUNTERS is not set
+# CONFIG_SLUB_DEBUG is not set
+CONFIG_JUMP_LABEL=y
 CONFIG_STRICT_KERNEL_RWX=y
-CONFIG_STRICT_MODULE_RWX=y
-CONFIG_MODULES=y
-CONFIG_MODULE_UNLOAD=y
+# CONFIG_BLK_DEBUG_FS is not set
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_SUNXI_V5=y
 CONFIG_AEABI=y
-CONFIG_OABI_COMPAT=y
-CONFIG_HIGHMEM=y
-CONFIG_ARM_APPENDED_DTB=y
-CONFIG_ARM_ATAG_DTB_COMPAT=y
 CONFIG_CPU_FREQ=y
 CONFIG_CPUFREQ_DT=y
 CONFIG_CPU_IDLE=y
 CONFIG_ARM_CPUIDLE=y
-CONFIG_FPE_NWFPE=y
-CONFIG_NET=y
-CONFIG_PACKET=y
-CONFIG_UNIX=y
-CONFIG_INET=y
-CONFIG_IP_PNP=y
-CONFIG_IP_PNP_DHCP=y
-CONFIG_IP_PNP_BOOTP=y
-# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
-# CONFIG_INET_XFRM_MODE_TUNNEL is not set
-# CONFIG_INET_XFRM_MODE_BEET is not set
-# CONFIG_INET_DIAG is not set
-# CONFIG_IPV6 is not set
-CONFIG_CFG80211=y
-CONFIG_CFG80211_WEXT=y
-CONFIG_MAC80211=y
-CONFIG_MAC80211_LEDS=y
+# CONFIG_SUSPEND is not set
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_SUNXI_RSB=y
@@ -45,40 +31,13 @@ CONFIG_MTD_M25P80=y
 CONFIG_MTD_SPI_NOR=y
 CONFIG_MTD_UBI=y
 CONFIG_MTD_UBI_BLOCK=y
-CONFIG_SCSI=y
-CONFIG_BLK_DEV_SD=y
-CONFIG_CHR_DEV_SG=y
-CONFIG_CHR_DEV_SCH=y
-CONFIG_NETDEVICES=y
-# CONFIG_ETHERNET is not set
-CONFIG_MDIO_DEVICE=y
-CONFIG_USB_NET_DRIVERS=m
-CONFIG_USB_RTL8150=m
-# CONFIG_WLAN_VENDOR_ADMTEK is not set
-# CONFIG_WLAN_VENDOR_ATH is not set
-# CONFIG_WLAN_VENDOR_ATMEL is not set
-# CONFIG_WLAN_VENDOR_BROADCOM is not set
-# CONFIG_WLAN_VENDOR_CISCO is not set
-# CONFIG_WLAN_VENDOR_INTEL is not set
-# CONFIG_WLAN_VENDOR_INTERSIL is not set
-# CONFIG_WLAN_VENDOR_MARVELL is not set
-# CONFIG_WLAN_VENDOR_MEDIATEK is not set
-# CONFIG_WLAN_VENDOR_RALINK is not set
-# CONFIG_WLAN_VENDOR_REALTEK is not set
-# CONFIG_WLAN_VENDOR_RSI is not set
-# CONFIG_WLAN_VENDOR_ST is not set
-# CONFIG_WLAN_VENDOR_TI is not set
-# CONFIG_WLAN_VENDOR_ZYDAS is not set
-# CONFIG_WLAN_VENDOR_QUANTENNA is not set
 CONFIG_INPUT_POLLDEV=y
 CONFIG_INPUT_EVDEV=y
 # CONFIG_KEYBOARD_ATKBD is not set
 CONFIG_KEYBOARD_SUN4I_LRADC=y
 # CONFIG_INPUT_MOUSE is not set
-CONFIG_INPUT_TOUCHSCREEN=y
-CONFIG_TOUCHSCREEN_GOODIX=m
-CONFIG_INPUT_MISC=y
 # CONFIG_SERIO_SERPORT is not set
+CONFIG_VT_HW_CONSOLE_BINDING=y
 CONFIG_SERIAL_8250=y
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_8250_NR_UARTS=8
@@ -86,13 +45,13 @@ CONFIG_SERIAL_8250_RUNTIME_UARTS=8
 CONFIG_SERIAL_8250_DW=y
 CONFIG_SERIAL_OF_PLATFORM=y
 # CONFIG_HW_RANDOM is not set
+CONFIG_I2C=y
 CONFIG_I2C_CHARDEV=y
 CONFIG_I2C_MV64XXX=y
 CONFIG_SPI=y
 CONFIG_SPI_GPIO=y
 CONFIG_SPI_SUN6I=y
 CONFIG_SPI_SPIDEV=y
-CONFIG_PTP_1588_CLOCK=y
 CONFIG_GPIO_SYSFS=y
 CONFIG_POWER_SUPPLY=y
 # CONFIG_HWMON is not set
@@ -105,60 +64,37 @@ CONFIG_MFD_SYSCON=y
 CONFIG_REGULATOR=y
 CONFIG_REGULATOR_FIXED_VOLTAGE=y
 # CONFIG_RC_CORE is not set
-CONFIG_MEDIA_SUPPORT=y
-CONFIG_DRM=y
-CONFIG_DRM_SUN4I=y
-CONFIG_DRM_SUN8I_MIXER=y
-CONFIG_DRM_PANEL_SIMPLE=y
-CONFIG_DRM_DUMB_VGA_DAC=y
-CONFIG_FB_SIMPLE=y
-CONFIG_FB_SSD1307=y
-CONFIG_BACKLIGHT_PWM=y
-CONFIG_SOUND=y
-CONFIG_SND=y
-CONFIG_SND_OSSEMUL=y
-CONFIG_SND_MIXER_OSS=y
-CONFIG_SND_PCM_OSS=y
-CONFIG_SND_ALOOP=y
-# CONFIG_SND_SPI is not set
-CONFIG_SND_SOC=y
-CONFIG_SND_SUN4I_CODEC=y
-CONFIG_SND_SUN4I_I2S=y
-CONFIG_SND_SUN4I_SPDIF=y
-CONFIG_SND_SIMPLE_CARD=y
-CONFIG_USB_HIDDEV=y
+# CONFIG_HID is not set
+# CONFIG_USB_HID is not set
 CONFIG_USB=y
 CONFIG_USB_DYNAMIC_MINORS=y
-CONFIG_USB_OTG=y
-CONFIG_USB_MON=m
 CONFIG_USB_EHCI_HCD=y
 # CONFIG_USB_EHCI_TT_NEWSCHED is not set
 CONFIG_USB_EHCI_HCD_PLATFORM=y
 CONFIG_USB_OHCI_HCD=y
 CONFIG_USB_OHCI_HCD_PLATFORM=y
-CONFIG_USB_STORAGE=y
 CONFIG_USB_MUSB_HDRC=y
 CONFIG_USB_MUSB_SUNXI=y
 CONFIG_NOP_USB_XCEIV=y
 CONFIG_USB_GADGET=y
 CONFIG_USB_GADGET_VBUS_DRAW=500
-CONFIG_USB_CDC_COMPOSITE=y
+CONFIG_USB_ZERO=y
 CONFIG_MMC=y
 CONFIG_MMC_SUNXI=y
 CONFIG_NEW_LEDS=y
 CONFIG_LEDS_CLASS=y
 CONFIG_LEDS_GPIO=y
+CONFIG_LEDS_TRIGGERS=y
 CONFIG_LEDS_TRIGGER_HEARTBEAT=y
 CONFIG_LEDS_TRIGGER_DEFAULT_ON=y
 CONFIG_DMADEVICES=y
+CONFIG_SYNC_FILE=y
 CONFIG_STAGING=y
-CONFIG_RTL8723BS=m
-CONFIG_FB_TFT=y
-CONFIG_FB_FLEX=y
 CONFIG_SUN8I_A83T_CCU=y
 CONFIG_SUN8I_DE2_CCU=y
 CONFIG_SUN8I_R_CCU=y
 # CONFIG_IOMMU_SUPPORT is not set
+CONFIG_PWM=y
 CONFIG_PWM_SUN4I=y
 CONFIG_PHY_SUN4I_USB=y
 CONFIG_NVMEM=y
@@ -170,19 +106,19 @@ CONFIG_SQUASHFS=y
 CONFIG_SQUASHFS_FILE_DIRECT=y
 # CONFIG_SQUASHFS_ZLIB is not set
 CONFIG_SQUASHFS_XZ=y
-CONFIG_NFS_FS=y
-CONFIG_NFS_V3_ACL=y
-CONFIG_NFS_V4=y
-CONFIG_ROOT_NFS=y
 CONFIG_NLS_CODEPAGE_437=y
 CONFIG_NLS_ISO8859_1=y
 CONFIG_PRINTK_TIME=y
 CONFIG_DEBUG_FS=y
-CONFIG_DEBUG_KERNEL=y
 CONFIG_STACKTRACE=y
 CONFIG_RCU_TRACE=y
 # CONFIG_FTRACE is not set
+CONFIG_KEYS=y
 CONFIG_CRYPTO_RSA=y
+CONFIG_CRYPTO_CCM=y
+CONFIG_CRYPTO_GCM=y
+CONFIG_CRYPTO_CMAC=y
+CONFIG_CRYPTO_ARC4=y
 CONFIG_CRYPTO_DEV_SUN4I_SS=y
 CONFIG_ASYMMETRIC_KEY_TYPE=y
 CONFIG_ASYMMETRIC_PUBLIC_KEY_SUBTYPE=y