[0/4] usb: typec: ucsi: ccg: add runtime pm support

Message

Ajay Gupta May 17, 2019, 4:38 p.m. UTC

Hi Heikki

These patches add support for runtime power management for UCSI CCGx driver.
I have tested them with NVIDIA GPU card which has i2c interface to talk to
CCG controller. I have added runtime pm support for the i2c bus driver as well.

First two patches add support for runtime pm in i2c bus driver and UCSI CCGx
driver.

Last two patches add workaround for an old version of ccg firmware
which has known issue of not missing interrupt when a device is connected
to runtime resume the ccg controller. The workaround is needed because
if a GPU card doesn't get new firmware but gets new kernel then also it
should continue to work.

Thanks
Ajay

Ajay Gupta (4):
  i2c: nvidia-gpu: add runtime pm support
  usb: typec: ucsi: ccg: enable runtime pm support
  i2c: nvidia-gpu: resume ccgx i2c client
  usb: typec: ucsi: ccg: add runtime pm workaround

 drivers/i2c/busses/i2c-nvidia-gpu.c |  37 ++++++--
 drivers/usb/typec/ucsi/ucsi.c       |   1 +
 drivers/usb/typec/ucsi/ucsi_ccg.c   | 138 +++++++++++++++++++++++++++-
 3 files changed, 165 insertions(+), 11 deletions(-)