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SD-Card Clock Loopback muxing in the Linux devicetree

Dominik Haller
Prodigy 170 points


Hello,

in several devicetrees of Jacinto and Sitara EVMs a line in the muxing node of the SD-card interface can be found similar to:

J784S4_IOPAD(0x100, PIN_INPUT, 0) /* (###) MMC1_CLKLB */

or

AM64X_IOPAD(0x0290, PIN_INPUT, 0) /* (#N/A) MMC1_CLKLB */

Can you provide some hints on what this setting's purpose is on your EVMs?

Regards

Dominik