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340d538e3b
Add SAI I2S and audio bindings to Data Modul i.MX8M Plus eDM SBC. The SGTL5000 is attached to SAI3, however the SGTL5000 codec MCLK must be supplied even if the SAI3 is not in use and is controlled separately by the codec. The MCLK is also used to drive the codec I2C block, so without MCLK, I2C access to the codec would not be possible. To provide such flexible MCLK control, use PWM4 with period 1 and duty cycle 50% as 12 MHz clock source, as there is no direct way to route MX8MP CCM clock to the MCLK pin. Use codec as bitclock and frame clock master, so that the SGTL5000 PLL can be used to generate derived clock. Signed-off-by: Marek Vasut <marex@denx.de> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Linux kernel
============
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