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i.MX6DL PCIe ext. REFCLK setup

Question asked by mahi on Nov 23, 2015
Latest reply on Dec 7, 2015 by Yuri Muhin



can someone explain to me how to set up PCIe clocks in device tree. My custom board with i.MX6DL provides an 125MHz LVDS clock to CLK1 as recommended in the "HW Design Checking List for i.MX6DQSDL".

Unfortunately I have no idea, how to set up device tree for this configuration. I assume at least one of the clocks must be "IMX6QDL_CLK_LVDS1_IN" but which ones?


Additionally, the default setup uses "IMX6QDL_CLK_SATA_REF_100M" for "ref_100m". I am not sure whether this clock is available in i.MX6DL as there is no SATA in i.MX6DL.


As the external PCIe-REFCLK is recommended, there should be some boards using it. Perhaps someone can share his device tree sources with the proper setup of the clocks.



Best regards,