On Fri, Sep 9, 2016 at 5:26 PM, Jun Li <jun.li@xxxxxxx> wrote: > Hi Guenter, > >> -----Original Message----- >> From: linux-usb-owner@xxxxxxxxxxxxxxx [mailto:linux-usb- >> owner@xxxxxxxxxxxxxxx] On Behalf Of Guenter Roeck >> Sent: Wednesday, August 24, 2016 5:11 AM >> To: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> >> Cc: Chandra Sekhar Anagani <chandra.sekhar.anagani@xxxxxxxxx>; Bruce >> Ashfield <bruce.ashfield@xxxxxxxxxxxxx>; Bin Gao <bin.gao@xxxxxxxxx>; >> Pranav Tipnis <pranav.tipnis@xxxxxxxxx>; Heikki Krogerus >> <heikki.krogerus@xxxxxxxxxxxxxxx>; linux-kernel@xxxxxxxxxxxxxxx; linux- >> usb@xxxxxxxxxxxxxxx; Guenter Roeck <groeck@xxxxxxxxxxxx> >> Subject: [RFC PATCH v3 1/2] usb: typec: USB Type-C Port Manager (tcpm) >> >> This driver implements the USB Type-C Power Delivery state machine >> for both source and sink ports. Alternate mode support is not >> fully implemented. >> >> The driver attaches to the USB Type-C class code implemented in >> the following patches. >> >> usb: typec: add driver for Intel Whiskey Cove PMIC USB Type-C PHY >> usb: USB Type-C connector class >> >> This driver only implements the state machine. Lower level drivers are >> responsible for >> - Reporting VBUS status and activating VBUS >> - Setting CC lines and providing CC line status >> - Setting line polarity >> - Activating and deactivating VCONN >> - Setting the current limit >> - Activating and deactivating PD message transfers >> - Sending and receiving PD messages >> >> The driver provides both a functional API as well as callbacks for >> lower level drivers. >> >> Signed-off-by: Guenter Roeck <groeck@xxxxxxxxxxxx> >> --- > > A specific question, if power sink wants to request a new power level > after SNK_READY, how to handle it with this tcpm? > So far I have considered the required power level to be static, based on our curent implementations. That should be easy to change, though, with an additional API function, to be called from a low level driver. Do you have that requirement, and would such a function meet your needs ? Thanks, Guenter -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
