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arm: allwinner: aw_mmc: Add a sysctl for debuging

Description

arm: allwinner: aw_mmc: Add a sysctl for debuging

Add a new hw.aw_mmc.debug sysctl to help debugging the driver.
Bit 0 will debug card changes (removal, insertion, power up/down)
Bit 1 will debug ios changes
Bit 2 will debug interrupts received
Bit 3 will debug commands sent

Details

Provenance
manuAuthored on
Parents
rS368184: vt: if loader did pass the font via metadata, use it
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