On Thursday, October 8, 2015 at 4:44:11 PM UTC+2, Chen-Yu Tsai wrote: > On Thu, Oct 8, 2015 at 10:41 PM, <[email protected] <javascript:>> > wrote: > > Good morning all > > > > I am trying to output allwinner A20 clk_out_a to the relevant PI12 of > the > > cpu > > That should be possible in theory and olimex board actually has a pin > where > > I can test it. > > > > My current setup is uBoot bootloader that can successfully boot Linux > > version 4.3.0-rc1-96427-g904c778-dirty > > I am using the sun7i-a20-olinuxino-micro.dts where I have removed the > uart6 > > (that should be conflicting with clk_out_a) and I have added > > > > &clk_out_a { > > pinctrl-names = "default"; > > pinctrl-0 = <&clk_out_a_pins_a>; > > status = "okay"; > > }; > > > > in the dts file, compiled and installed > > > > Now, there is nothing whatsoever in the relevant pin and the question is > > > > What am I missing ? > > > > Thanks for any hints you may give me > > > > P.S. Yes, I have read quite a lot documentation on dts, but evidently > not > > enough to find the solution myself. > > The clock on that pin is by default off. You still need a driver to > acquire > and enable it. > > I was thinking that by adding
pinctrl-0 = <&clk_out_a_pins_a>; I did indeed reference a driver to be added to the clock source, but this is then not correct Can you point to the correct syntax to bind clk_out_a_pins_a to clk_out_a ? > ChenYu > -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
