On Wed, 2014-03-05 at 15:07 +0200, Tero Kristo wrote: > On 03/01/2014 12:37 AM, Tony Lindgren wrote: > > * Christoph Fritz <chf.fritz@xxxxxxxxxxxxxx> [140214 06:24]: > >> Full device tree support for clock control, especially to set frequencies, > >> is not yet accomplished. Until then, configure the 24Mhz of sys_clkout2 to > >> feed an USB-Hub here. > > > > Hmm would like to see Tero's comments on this, I wonder if we should > > wait on this to avoid extra churn? > > Well, the set I posted that adds default clock parenting / default rate > support to DT hasn't actually moved forward, so you might want to take > this in as is now if it should be rushed. The clk-enable part isn't done > currently by anything anyway. Just wondering though, should you create > some sort of driver for your usb-hub which would control these clocks? The USB-Hub, a USB2512 is wired as non-configurable. Its pin 'XTAL1/CLKIN' can be connected to either a crystal or an external clock input. To economise the crystal, the clock-out of the omap is wired here. So in my view, a driver is unnecessary. Thanks -- Christoph -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
