Hi,, On Mon, Jul 21, 2014 at 10:03:07AM +0200, Lothar Waßmann wrote: > Hi, > > > On Fri, Jul 18, 2014 at 11:31:29AM +0200, Lothar Waßmann wrote: > > > This patch makes it possible to use the musb driver with HW that > > > requires external regulators or clocks. > > > > can you provide an example of such HW ? Are you not using the internal > > PHYs ? > > > The Ka-Ro electronics TX48 module uses the mmc0_clk pin as VBUSEN > rathern than usb0_drvvbus. This patch makes it possible to use an > external regulator to handle the VBUS switch through the 'vcc-supply' > property of the underlying generic_phy device.
OK, I get it now. But why would not use usb0_drvvbus ? You could still route usb0_drvvbus to the regulator enable pin and the regulator would be enabled for you once correct values are written to the IP's mailbox. I suppose this has something to do with layout constraints ? cheers -- balbi
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