Am Freitag, 21. September 2018, 10:13:41 CEST schrieb Heiko Stuebner: > It is good practice to make the setting of gpio-pinctrls explicitly in the > devicetree, and in this case even necessary. > Rockchip boards start with iomux settings set to gpio for most pins and > while the linux pinctrl driver also implicitly sets the gpio function if > a pin is requested as gpio that is not necessarily true for other drivers. > > The issue in question stems from uboot, where the sdmmc_pwr pin is set > to function 1 (sdmmc-power) by the bootrom when reading the 1st-stage > loader. The regulator controlled by the pin is active-low though, so > when the dwmmc hw-block sets its enabled bit, it actually disables the > regulator. By changing the pin back to gpio we fix that behaviour. > > Signed-off-by: Heiko Stuebner <heiko@xxxxxxxxx> applied for 4.20 _______________________________________________ Linux-rockchip mailing list Linux-rockchip@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/linux-rockchip
