Quoting Peter Chen (2016-06-01 05:05:20) > On Wed, Jun 01, 2016 at 01:57:23AM -0700, Stephen Boyd wrote: > > Quoting Krzysztof Kozlowski (2016-06-01 01:02:18) > > > Parse usb-pwrseq property from Device Tree to get the phandle to pwrseq > > > device. The pwrseq device will be used by USB hub to cycle the power > > > before activating ports. > > > > > > Signed-off-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx> > > > > Drive by review comment. > > > > I was hoping this would help me with a problem I'm having where I have a > > hub (smsc4604) that needs to be taken out of reset before my HSIC > > controller sends a USB reset to it, but it seems this is more about > > doing some sort of power on sequence after enumeration? > > > > No, you may need to do reset before enumeration, the general purpose of > reset is eliminate unstable hardware state, and let the controller find > the device. > > Try to do it at bootloader to see if it works for you. > Sorry the bootloader doesn't do this so that doesn't work for me. -- 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
