Hi, I have mcbsp1 working on an external codec. I moved the wires to the mcbsp3 pins. The codec is master, using tdm mode. I use the same codec i2s bus, and it gets the same setup (I change the dai-link stuff in my alsa machine driver to use the other omap i2s bus for my tests). If I pull the clk wire off the beagleboard pin, the clock from the codec looks good. With the wire attached to the pin, I don't see the pin wiggling. So it looks like maybe the pin is an output or something. The frame clock looks ok while connected. In the board-omap3beagle.c I configure all 3 mcbsp the same way: #ifdef CONFIG_OMAP_MUX static struct omap_board_mux board_mux[] __initdata = { #if 1 /* McBSP 1 slave */ OMAP3_MUX(MCBSP1_FSX, OMAP_MUX_MODE0 | OMAP_PIN_INPUT), OMAP3_MUX(MCBSP1_CLKX, OMAP_MUX_MODE0 | OMAP_PIN_INPUT), OMAP3_MUX(MCBSP1_DR, OMAP_MUX_MODE0 | OMAP_PIN_INPUT), OMAP3_MUX(MCBSP1_DX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT), #else /* McBSP 1 master */ OMAP3_MUX(MCBSP1_FSX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT), OMAP3_MUX(MCBSP1_CLKX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT), OMAP3_MUX(MCBSP1_DR, OMAP_MUX_MODE0 | OMAP_PIN_INPUT), OMAP3_MUX(MCBSP1_DX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT), #endif #if 1 /* McBSP 2 slave */ OMAP3_MUX(MCBSP2_FSX, OMAP_MUX_MODE0 | OMAP_PIN_INPUT), OMAP3_MUX(MCBSP2_CLKX, OMAP_MUX_MODE0 | OMAP_PIN_INPUT), OMAP3_MUX(MCBSP2_DR, OMAP_MUX_MODE0 | OMAP_PIN_INPUT), OMAP3_MUX(MCBSP2_DX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT), #else /* McBSP 2 master */ OMAP3_MUX(MCBSP2_FSX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT), OMAP3_MUX(MCBSP2_CLKX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT), OMAP3_MUX(MCBSP2_DR, OMAP_MUX_MODE0 | OMAP_PIN_INPUT), OMAP3_MUX(MCBSP2_DX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT), #endif #if 1 /* McBSP 3 slave */ OMAP3_MUX(MCBSP3_FSX, OMAP_MUX_MODE0 | OMAP_PIN_INPUT), OMAP3_MUX(MCBSP3_CLKX, OMAP_MUX_MODE0 | OMAP_PIN_INPUT), OMAP3_MUX(MCBSP3_DR, OMAP_MUX_MODE0 | OMAP_PIN_INPUT), OMAP3_MUX(MCBSP3_DX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT), #else /* McBSP 3 master */ OMAP3_MUX(MCBSP3_FSX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT), OMAP3_MUX(MCBSP3_CLKX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT), OMAP3_MUX(MCBSP3_DR, OMAP_MUX_MODE0 | OMAP_PIN_INPUT), OMAP3_MUX(MCBSP3_DX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT), #endif { .reg_offset = OMAP_MUX_TERMINATOR }, }; #endif So far I have not been able to get the codec mastered bit clock to work on either mcbsp2 or msbsp3. I have been trying to follow the logic in mcbsp.c and in omap-mcbsp.c in how things get inited. I suspect there is something I have not done? Any ideas. Thanks, Steve -- 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