78 lines
2.0 KiB
Markdown
78 lines
2.0 KiB
Markdown
# Unofficial reMarkable Linux Kernel
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***UNDER DEVELOPMENT***
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This kernel is for the reMarkable2 epaper tablet.
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# Differences
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This is a small fork of the alistair23 reMarkable kernel.
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# Build
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Build thine kernel thusly:
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```
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git clone https://spacecruft.org/redonkable/alistair23-linux
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cd alistair23-linux
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# should already be on this branch, but check it out:
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git checkout redonkable
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# XXX confirm which defconfig is best
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ARCH=arm CROSS_COMPILE=arm-none-eabi- make imx_v6_v7_defconfig
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ARCH=arm CROSS_COMPILE=arm-none-eabi- make -j`nproc`
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ARCH=arm CROSS_COMPILE=arm-none-eabi- make modules_install INSTALL_MOD_PATH=./tmp
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rm -rf tmp/lib/modules/*/build tmp/lib/modules/*/source
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```
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Install files thusly. Symlink them later, or change `fw_env` variables.
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```
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# Kernel modules
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scp -pr tmp/lib/modules/* root@10.11.99.1:/lib/modules/
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# Kernel
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# XXX Update kernel version number
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scp -p arch/arm/boot/zImage root@10.11.99.1:/boot/zImage-5.4.94
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# DTB
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# XXX Update kernel version number
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# XXX Update dtb name
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scp -p arch/arm/boot/dts/imx7d-remarkable2.dtb root@10.11.99.1:/boot/imx7d-remarkable2.dtb-5.4.94
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```
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Log in and set symlinks to new kernel seteup.
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```
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ssh root@10.11.99.1
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cd /boot
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mv zImage zImage.bak
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# XXX Update kernel version number
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ln -s zImage-5.4.94 zImage
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mv zero-sugar.dtb zero-sugar.dtb.bak
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# XXX Update kernel version number
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# XXX which dtb gets read, by uboot or kernel?
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ln -s imx7d-remarkable2.dtb-5.4.94 zero-sugar.dtb
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ln -s imx7d-remarkable2.dtb-5.4.94 imx7d-remarkable2.dtb
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cd /lib/modules
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# XXX Update kernel version number
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mv 5.4.94 5.4.94.bak
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# Note, git tag may vary, something like:
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# XXX Update kernel version number
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ln -s 5.4.94-XXX 5.4.94
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```
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Then power off, power back up.
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# See Also
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* https://remarkablewiki.com/tech/rm2_otg_pogo
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* https://remarkablewiki.com/tech/kernel
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* https://remarkablewiki.com/tech/updatingkernel
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* https://remarkablewiki.com/tech/filesystem
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* https://github.com/ddvk/remarkable2-recovery
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# Fork
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This is a fork of the alistair23 reMarkable Linux kernel from this repository:
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* https://github.com/alistair23/linux
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