Because you haven’t shared the flash log, I don’t know which device tree are using (a00 or b00).
Maybe you could just apply the patch to tegra210-porg-gpio-p3448-0000-a00.dtsi and share the result of sudo cat /sys/kernel/debug/tegra_pinctrl_reg | grep -i spi again. The current result of that command seems not expected.
Is there no other way to determine which device tree I am using?
In any case, I modified the 00a file and attempted to build the kernel by running:
sudo ./nvbuild.sh -o $PWD/kernel_out
as per the instructions. Then after a while I get:
Error: Missing kernel image /home/sr/Linux_for_Tegra/source/public/kernel_out/arch/arm64/boot/Image
And the kernel_out folder remains empty. Any ideas?
From your dmesg, it seems you are using tegra210-p3448-0000-p3449-0000-b00.dts.
Apr 18 09:05:28 sr-desktop kernel: [ 0.420564] DTS File Name: /dvs/git/dirty/git-master_linux/kernel/kernel-4.9/arch/arm64/boot/dts/../../../../../../hardware/nvidia/platform/t210/porg/kernel-dts/tegra210-p3448-0000-p3449-0000-b00.dts
Re-build kernel should not be the issue about this topic.