> Make sure that MX51_PAD_GPIO1_1 does not remain configure as > ALT0/SD1_WP (it is out of reset). This is needed because of external > pull-up resistor attached to that pad that, when left unchanged, will > drive SD1_WP high preventing eSDHC1/eMMC from working correctly. > > To fix that add a pinmux configuration line configureing the pad to > function as a GPIO. While we are at it, add a corresponding > output-high GPIO hog in an effort to minimize current consumption. > > Cc: Nikita Yushchenko <[email protected]> > Cc: Shawn Guo <[email protected]> > Cc: Fabio Estevam <[email protected]> > Cc: Lucas Stach <[email protected]> > Cc: Chris Healy <[email protected]> > Cc: Rob Herring <[email protected]> > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > Signed-off-by: Andrey Smirnov <[email protected]>
Tested-By: Nikita Yushchenko <[email protected] Tested on 8.9'' RDU1. Without this patch, eMMC does not work, get [ 40.801367] mmc0: Timeout waiting for hardware interrupt. [ 40.806789] mmc0: sdhci: ============ SDHCI REGISTER DUMP =========== ... <dump follows> With this patch, eMMC works correctly. Nikita
