Hi, (the next paragraph is just an explanation of the situation - can be skipped to get to the actual question) I've received a board (either called EWS370 or EWS870AP in their firmware) which was announced as AP148 based. But the initial booting up with LEDE wasn't working and even the serial port didn't start up. And some tests with the standard earlycon registers for the IPQ8064 also didn't work. But then I saw that the original firmware used some registers at 0x16640000 for ttyHSL0. A quick test showed that this is really the correct address for the serial console. I found in the Linux sources that apq8064 is the only one which actually uses this register offset. Unsure whether this is actually an APQ8064, I've removed the antennas, heatsinks and shielding to find a CPU with the name IPQ8068 on it. It looks like the support for this CPU was never upstreamed by QCA. A quick search in the linux-msm tree in codeaurora also showed only uninteresting mentions of this CPU [1]. I already know from Dakota that the upstreaming effort from some QCA developers were suddenly stopped. Some of the Dakota drivers were therefore waiting in some branch of some repository [2] or hanging around in an unfinished state on some mailing list. So maybe there are similar things somewhere for the IPQ8068. Can someone maybe point me in the right direction? Kind regards, Sven [1] https://source.codeaurora.org/quic/qsdk/oss/kernel/linux-msm/commit/?id=1fc998bf276c7407e03953d8c306cda25b29b6b5 https://source.codeaurora.org/quic/qsdk/oss/kernel/linux-msm/commit/?id=5ae236e30ff401f4600125ad452e93973ddc205b https://source.codeaurora.org/quic/qsdk/oss/kernel/linux-msm/commit/?id=613c5a41ed666383c778129c7b172987aa16f31c https://source.codeaurora.org/quic/qsdk/oss/kernel/linux-msm/commit/?id=4aa6962af93bf32dd5c5e6b2313c80f4732b3286 https://source.codeaurora.org/quic/qsdk/oss/kernel/linux-msm/commit/?id=8b2089087088e08f5e68b83ba04af44ecc3f9e9d [2] https://source.codeaurora.org/quic/qsdk/mmcclint-qca/log/?h=for-next