https://community.nxp.com/t5/i-MX-Processors/How-does-one-clock-an-i-mx8-SAI-from-external-clock-source/m-p/1527437#M195553 <P>I see this question has been asked in various forms.&nbsp; Is there an example of how to do this from pinmux through device tree and clock tree?&nbsp; The RM suggests this can be done:</P><P>13.1.1.4.1 SAI Master Clock Inputs/Outputs<BR />The MCLK pin on each SAI module can be configured as either an input or an output.<BR />When configured as an output, the SAIn_CLK_ROOT from the CCM or the<BR />MCLK_OUT from SAIn is routed to the pad output. Note that the SAI IP MCLK out,<BR />MCLK_OUT is always derived from the ipg_clk_sai_mclk (MCLK[1]) input. When<BR />configured as an input, the external input to the pad will be used as SAIn_MCLK and is<BR />routed to SAIn_MCLK_IN, which can be used as master clock for SAI. Below is the<BR />diagram showing the both input/output options.</P><P>I can't seem to arrive at a solution.&nbsp; Any help is very appreciated.</P><P>&nbsp;</P> Fri, 23 Sep 2022 14:43:32 GMT mwilliams 2022-09-23T14:43:32Z https://community.nxp.com/t5/i-MX-Processors/How-does-one-clock-an-i-mx8-SAI-from-external-clock-source/m-p/1527437#M195553 <P>I see this question has been asked in various forms.&nbsp; Is there an example of how to do this from pinmux through device tree and clock tree?&nbsp; The RM suggests this can be done:</P><P>13.1.1.4.1 SAI Master Clock Inputs/Outputs<BR />The MCLK pin on each SAI module can be configured as either an input or an output.<BR />When configured as an output, the SAIn_CLK_ROOT from the CCM or the<BR />MCLK_OUT from SAIn is routed to the pad output. Note that the SAI IP MCLK out,<BR />MCLK_OUT is always derived from the ipg_clk_sai_mclk (MCLK[1]) input. When<BR />configured as an input, the external input to the pad will be used as SAIn_MCLK and is<BR />routed to SAIn_MCLK_IN, which can be used as master clock for SAI. Below is the<BR />diagram showing the both input/output options.</P><P>I can't seem to arrive at a solution.&nbsp; Any help is very appreciated.</P><P>&nbsp;</P> Fri, 23 Sep 2022 14:43:32 GMT https://community.nxp.com/t5/i-MX-Processors/How-does-one-clock-an-i-mx8-SAI-from-external-clock-source/m-p/1527437#M195553 mwilliams 2022-09-23T14:43:32Z