diff options
| author | Frieder Schrempf <[email protected]> | 2022-06-27 13:00:59 +0200 |
|---|---|---|
| committer | Stefano Babic <[email protected]> | 2022-06-28 15:24:31 +0200 |
| commit | 1af2d4697a3b229e84901d2bdd4ffba0eb2217de (patch) | |
| tree | 2530f3ac00c925c56031d22c6f0dabc84c487085 /lib | |
| parent | 2add0511757e2c5897a88b57c5ea8c912140e60f (diff) | |
imx: kontron-sl-mx8mm: Enable PCA9450 regulator driver and fix SD card access
Currently accessing the SD card on USDHC2 fails with:
=> mmc dev 1
Card did not respond to voltage select! : -110
This is due to the fact that UHS modes are enabled in the defconfig
and the devicetree, but the referenced LDO5 regulator (reg_nvcc_sd)
is not available to switch the data lines from 3.3V to 1.8V mode.
By enabling the regulator driver the vqmmc-supply is now available
and the SD card works also in high speed modes:
=> mmc dev 1
switch to partitions #0, OK
mmc1 is current device
Please note that the board has a GPIO connected to the SD_VSEL signal
of the PMIC. As the driver uses the LDO5CTRL_H register to set the
voltage, we need to make sure that this GPIO (GPIO01_IO4) is set to
a high level.
Signed-off-by: Frieder Schrempf <[email protected]>
Reviewed-by: Fabio Estevam <[email protected]>
Tested-by: Fabio Estevam <[email protected]>
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions