Integrate u-boot-seco-imx/seco_lf_v2021.04_d18-sd-dse (!433) · Merge requests · Clea OS / layers / seco / meta-seco-imx

[D18][DT] usdhc2: increase drive-strength for uSD

The signal on some uSD seems to undershoot too much at 50MHz with the original drive-strength X1: increase it to X4, as X2 is also not sufficient.

As 100MHz is set to X2, increase it too to X4 to be safe.

Drive Strength as described in IMX8MPRM: 0x0 -> 00* == DSE_X1 — X1 0x4 -> 10* == DSE_X2 — X2 0x2 -> 01* == DSE_X4 — X4 0x6 -> 11* == DSE_X6 — X6

Integrate u-boot-seco-imx/seco_lf_v2021.04_d18-sd-dse