imx287 SAIF1_MCLK as general purpose clock

[francescoluccon]

I would know if it's possible with imx287 custom board to drive SAIF1_MCLK gpio (pin GPMI_CE3N) as general purpose clock with frequency about 4-5 KHz.

What's the configuration I need to deploy during kernel startup? Working with kernel 2.6.35.3 I've applied a similar initialitiation that I found into audio_clk_init() function (source file mach-mx28/device.c) but it didn't work.

[weidong_sun]

Hi Francesco,

    It is well known that GPIO can be used to simulate I2C and SPI interface, so it is also no problem for you to create 4-5KHz clock, but this is a kind of clock generated by software, and any GPIO can be used for your purpose, you need to write corresponding code, but not modify audio clock function.

Regards,

Weidong