On Wed, Feb 13, 2019 at 05:00:51PM +0000, Pedro Sousa wrote: > Hi, > > On 2/13/2019 9:30 AM, Avri Altman wrote: > >> > >> I can see the issue, there is no straightforward way of having "ufs-bsg" > >> without > >> a device attached? > > Right. > > > >> > >> This or any other method of talking with UniPro and MPhy layers when there > >> is no > >> device are necessary for us. Do you see some good way of doing this? > > I don't really know. > > If you have access to the bootloader, then implement it there, > > And call this functionality via fastboot getvar or fastboot oem. > For us would be better if we manage to use it through the driver. > > Until now, from this thread I think there are two scenarios: > > When there's a device, through ufs-bsg: > - ufs-utils: using the current ufs_bsg interface will have the capability to > cover most of the scenarios that I can think of and will be the standard way > to > interact with the ufs driver. > > During bring up/debug without link to device: > > - My proposal is to create a debugFS interface: > uic-cmd/ > ├── dme-get > ├── dme-set > ├── dme-enable > ├── dme-reset > └── ... > test-feature/ > ├── PA_tf > └── ... > error-dump/ > ├── UECPA > ├── UECDL > └── ... > ... > > I kindly request the ecosystem feedback.
Don't ever put anything in debugfs that you need for a "real" system that you rely on, as it should not normally be present or mounted at all. It's for debugging stuff only, please be aware of that. greg k-h
