On Tue, 2019-08-06 at 15:07 -0700, Stephen Boyd wrote: > From: Andrey Pronin <apronin@xxxxxxxxxxxx> > > Add TPM2.0 PTP FIFO compatible SPI interface for chips with Cr50 > firmware. The firmware running on the currently supported H1 > Secure Microcontroller requires a special driver to handle its > specifics: > > - need to ensure a certain delay between spi transactions, or else > the chip may miss some part of the next transaction; > - if there is no spi activity for some time, it may go to sleep, > and needs to be waken up before sending further commands; > - access to vendor-specific registers. Which Chromebook models have this chip? If I had an access to one, how do I do kernel testing with it i.e. how do I get it to boot initramfs and bzImage from a USB stick? /Jarkko
