On Tue, Jul 22, 2014 at 10:06:13AM +0200, Lothar Waßmann wrote: > Hi, > > Felipe Balbi wrote: > > 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 ? > > > Yes. The usb0_drvvbus is used for a different purpose. alright, thanks for the info. I'll revisit this in a few days, quite busy right now and my tree is closed for v3.17 anyway. cheers -- balbi
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