On Thu, Sep 22, 2022 at 03:02:12PM +0200, 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. At least with Infineon (formerly Cypress), as a customer you might get a private firmware and this will be maintained internally by them on a separate customer branch. Any subsequent bugfixes or feature requests will usually be applied to that customer branch and a new firmware built from it. I think their internal "mainline" branch might get merged into the customer branches from time to time, but this seems to be done on an ad-hoc basis. This is our experience at least. I would also point out that the BCM4359 is equivalent to the CYW88359/CYW89359 chipset, which we are using in some of our products. Note that this is a Cypress chipset (identifiable by the Version: ... (... CY) tag in the version string). But the FW Konrad is linking appears to be for a Broadcom chipset. FYI, here's a publicly available set of firmware files for the '4359: https://github.com/NXP/imx-firmware/tree/master/cyw-wifi-bt/1FD_CYW4359 Anyway, I would second Hector's suggestion and make this a separate FW. > > 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? Kind regards, Alvin > > Yours, > Linus Walleij
