Quoting Jarkko Sakkinen (2019-08-19 09:35:05) > On Mon, Aug 12, 2019 at 03:36:19PM -0700, Stephen Boyd wrote: > > Cr50 firmware has a requirement to wait for the TPM to wakeup before > > sending commands over the SPI bus. Otherwise, the firmware could be in > > deep sleep and not respond. Add a hook to tpm_tis_spi_transfer() before > > we start a SPI transfer so we can keep track of the last time the TPM > > driver accessed the SPI bus. > > > > Cc: Andrey Pronin <[email protected]> > > Cc: Duncan Laurie <[email protected]> > > Cc: Jason Gunthorpe <[email protected]> > > Cc: Arnd Bergmann <[email protected]> > > Cc: Greg Kroah-Hartman <[email protected]> > > Cc: Guenter Roeck <[email protected]> > > Cc: Alexander Steffen <[email protected]> > > Signed-off-by: Stephen Boyd <[email protected]> > > --- > > drivers/char/tpm/tpm_tis_spi.c | 3 +++ > > 1 file changed, 3 insertions(+) > > > > diff --git a/drivers/char/tpm/tpm_tis_spi.c b/drivers/char/tpm/tpm_tis_spi.c > > index 819602e85b34..93f49b1941f0 100644 > > --- a/drivers/char/tpm/tpm_tis_spi.c > > +++ b/drivers/char/tpm/tpm_tis_spi.c > > @@ -44,6 +44,7 @@ struct tpm_tis_spi_phy { > > struct spi_device *spi_device; > > int (*flow_control)(struct tpm_tis_spi_phy *phy, > > struct spi_transfer *xfer); > > + void (*pre_transfer)(struct tpm_tis_spi_phy *phy); > > A callback should have somewhat well defined purpose. A callback named > as pre_transfer() could have any purpose. >
Any name is fine for me. Any suggestions?
