On Fri, Sep 2, 2016 at 12:06 PM, Jason Gunthorpe <jgunthorpe@xxxxxxxxxxxxxxxxxxxx> wrote: > On Fri, Sep 02, 2016 at 09:51:21AM -0500, Rob Herring wrote: >> > +- linux,sml-base : base address of the Event Log. It is a physical address. >> > + sml stands for shared memory log. >> >> How is it a physical address on an i2c device? Why 2 cells (which needs >> to be documented also)? > > To be clear, as I understand it, this mechanism is a hand off from the > boot firmware to Linux. > > The boot firmware talks i2c to the device, does some stuff, writes it > to memory and then linux reads that stuff. I agree it seems crazy to > include a random physical address like that. I'd put that in reserved-memory then if designing this from scratch... Must not be completely random as somehow the kernel doesn't use that memory. > The linux,sml-* names appear to have been used by IBM for a long time > on their enterprise PPC platforms (see drivers/char/tpm/tpm_of.c), so > I've expected we have to keep them? Yes. I wasn't aware of that. > I asked Nayna to document this stuff IBM is doing so the rest of us > in TPM land can have a hope of maintaining it... > > Jason > -- > To unsubscribe from this list: send the line "unsubscribe devicetree" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
