Run LINUX mainline kernel based on the buildroot fsimx6sx-B2019.11 release of efusA9X module.

BrenkeM · May 13th 2022

Sometime it would be nice to only run the current release of a F+S module with a mainline kernel, for example to check if bugs where fixed in newer versions or to develop patches for pushing them to the mainline source code later.

What do we need to do, to build and run the current buildroot fsimx6sx-B2019.11 release with the current mainline kernel (5.18.0) from https://github.com/torvalds/linux?

BrenkeM · May 13th 2022

To adapt the buildroot configuration for using the mainline kernel I changed the following parts:

- changed linux folder (linux-fsimx6sx) to git repo of mainline kernel

- prepair the changes under [1]

- build image and load according uboot procedure under [0]

[0]:

Starting and running system completely in RAM (from UBOOT)

[1]:

Diff

diff --git a/efusa9x.dts b/efusa9x.dts
index 20dd8991..39153b4b 100644
--- a/efusa9x.dts
+++ b/efusa9x.dts
@@ -142,10 +142,10 @@ lvds_wvga { \
//#define CONFIG_EFUSA9X_CAPTOUCH_ILITEK
/* CMA: Set 320 MB for Continuous Memory Allocator */
-#define CONFIG_EFUSA9X_CMA_SIZE 0x14000000
+//#define CONFIG_EFUSA9X_CMA_SIZE 0x14000000
/* On-board NAND */
-#define CONFIG_EFUSA9X_NAND
+//#define CONFIG_EFUSA9X_NAND
/* On-board eMMC */
//#define CONFIG_EFUSA9X_EMMC
@@ -565,15 +565,15 @@ lvds_wvga { \
};
/* RAM size for Continues Memory Allocator */
-&cma {
- size = <CONFIG_EFUSA9X_CMA_SIZE>;
-};
-
-&busfreq {
- /* Disable bus frequency scaling, because reducing bus frequency to
- 24 MHz does not work with all types of DDR3 RAM */
- disable-scaling;
-};
+//&cma {
+// size = <CONFIG_EFUSA9X_CMA_SIZE>;
+//};
+
+//&busfreq {
+// /* Disable bus frequency scaling, because reducing bus frequency to
+// 24 MHz does not work with all types of DDR3 RAM */
+// disable-scaling;
+//};
#ifdef CONFIG_EFUSA9X_ADC_1
&adc1 {

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Diff

diff --git a/Kconfig b/Kconfig
index b39a5d19..cd5057a3 100644
--- a/Kconfig
+++ b/Kconfig
@@ -10,6 +10,12 @@ CONFIG_CGROUPS=y
CONFIG_NAMESPACES=y
# CONFIG_PID_NS is not set
CONFIG_RELAY=y
+CONFIG_BLK_DEV_INITRD=y
+# CONFIG_RD_BZIP2 is not set
+# CONFIG_RD_LZMA is not set
+# CONFIG_RD_XZ is not set
+# CONFIG_RD_LZO is not set
+# CONFIG_RD_LZ4 is not set
CONFIG_EXPERT=y
CONFIG_KALLSYMS_ALL=y
CONFIG_PERF_EVENTS=y
@@ -88,9 +94,6 @@ CONFIG_MTD_PHYSMAP_OF=y
CONFIG_MTD_DATAFLASH=y
CONFIG_MTD_M25P80=y
CONFIG_MTD_SST25L=y
-CONFIG_MTD_NAND=y
-CONFIG_MTD_NAND_GPMI_NAND_FUS=y
-CONFIG_MTD_NAND_MXC=y
CONFIG_MTD_SPI_NOR=y
CONFIG_SPI_FSL_QUADSPI=y
CONFIG_MTD_UBI=y

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Diff

diff --git a/board/f+s/common/sbin/fsgetty b/board/f+s/common/sbin/fsgetty
index 196ad2fe..141b3892 100755
--- a/board/f+s/common/sbin/fsgetty
+++ b/board/f+s/common/sbin/fsgetty
@@ -34,9 +34,11 @@ get_login_tty
if [ $login_tty != null ] ; then
get_login_speed
logger -t $fsgetty "Starting getty on $login_tty with speed $login_speed"
- exec /sbin/getty -L $login_tty $login_speed vt100
+# exec /sbin/getty -L $login_tty $login_speed vt100
fi
+exec /sbin/getty -L 115200 ttymxc0 xterm
+
logger -t $fsgetty "No login requested, going to sleep"
# Sleep forever; wake up every second to check if login_tty has changed

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Diff

diff --git a/configs/fsimx6sx_min_efus_defconfig b/configs/fsimx6sx_min_efus_defconfig
index cca93bde..8009890c 100644
--- a/configs/fsimx6sx_min_efus_defconfig
+++ b/configs/fsimx6sx_min_efus_defconfig
@@ -26,27 +26,22 @@ BR2_ROOTFS_OVERLAY="rootfs_overlay"
BR2_ROOTFS_POST_BUILD_SCRIPT="board/f+s/fsimx6/finalscript_min-fsimx6sx"
BR2_LINUX_KERNEL=y
BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.9.88"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.19.0"
BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="Kconfig"
BR2_LINUX_KERNEL_DTS_SUPPORT=y
BR2_LINUX_KERNEL_CUSTOM_DTS_PATH="efusa9x.dts"
BR2_PACKAGE_BUSYBOX_CONFIG="board/f+s/common/busybox-1.30.1.config"
BR2_PACKAGE_BUSYBOX_SHOW_OTHERS=y
+BR2_PACKAGE_BZIP2=y
# BR2_PACKAGE_EUDEV_ENABLE_HWDB is not set
BR2_PACKAGE_NANO=y
+BR2_TARGET_ROOTFS_CPIO=y
+BR2_TARGET_ROOTFS_CPIO_GZIP=y
+BR2_TARGET_ROOTFS_CPIO_UIMAGE=y
# BR2_TARGET_ROOTFS_TAR is not set
-BR2_TARGET_ROOTFS_UBIFS=y
-BR2_TARGET_ROOTFS_UBIFS_LEBSIZE=0x1f000
+BR2_PACKAGE_HOST_E2FSPROGS=y

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BrenkeM · May 13th 2022

Thats it.

CASE CLOSED.

Run LINUX mainline kernel based on the buildroot fsimx6sx-B2019.11 release of efusA9X module.

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