On 22/09/2022 22.02, Linus Walleij wrote: > On Thu, Sep 22, 2022 at 12:21 PM Konrad Dybcio > <konrad.dybcio@xxxxxxxxxxxxxx> wrote: > >> Also worth noting is the 'somc' bit, meaning there are probably *some* SONY >> customizations, but that's also just a guess. > > What I have seen from BRCM customizations on Samsung phones is that > the per-device customization of firmware seems to involve the set-up of > some GPIO and power management pins. For example if integrated with > an SoC that has autonomous system resume, or if some GPIO line has > to be pulled to enable an external regulator or PA. > > To the best of my knowledge that customization is done by consultants > from Broadcom when working with the device manufacturer, and > eventually they roll a unique firmware for the device. Probably because > the firmware can only be signed for execution by Broadcom? I don't think the firmware is signed, they probably just don't want to share the source code with most customers? (Except Apple maybe, but Apple gets custom silicon too...). - Hector
