Hi again, Just after the posting I've found the source of reported error.
The Angstrom DTS file contains following pinctrl request in the DTS for HDMI audio. 0x1a8 0x1f /* mcasp0_axr1 GPIO1_27 | OUTPUT | PULLUP */ mcasp_clock_enable = <&gpio2 27 0>; /* BeagleBone Black Clk enable on GPIO1_27 */ It is false, because clock control is on gpio3[21]. Correct configuration register should be different: 0x06c 0x17 /* gpmc_a11.gpio3_21, MUX_MODE7 | PIN_OUTPUT */ I've been using this without checking. After fixing this, the AXR1 output is correctly generated (and not overriden by later request in the same pinctrl-single line. Miero -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.