> Some SanDisk Ultra cards trigger intermittent errors on detection > resulting in an -EOPNOTSUPP, when running at 50MHz. > > Waveform analysis suggest that the level shifters that are used on the > RK3399-Q7 module (for voltage translation between the on-module > voltages and the 3.3V required on the card-edge) don't handle clock > rates at or above 48MHz properly. This change reduces the maximum > frequency on the external SD-interface to 40MHz (for a safety margin > of 20%). > > Reported-by: Jakob Unterwurzacher <jakob.unterwurzac...@theobroma-systems.com> > Signed-off-by: Philipp Tomsich <philipp.toms...@theobroma-systems.com> > Tested-by: Christoph Muellner <christoph.muell...@theobroma-systems.com> > --- > > arch/arm/dts/rk3399-puma.dtsi | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) >
Applied to u-boot-rockchip, thanks! _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
