> On 21.09.2018, at 10:59, Heiko Stuebner <he...@sntech.de> wrote: > > 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. > > [picked from the identical linux patch > https://patchwork.kernel.org/patch/10609253/] > Signed-off-by: Heiko Stuebner <he...@sntech.de>
Reviewed-by: Philipp Tomsich <philipp.toms...@theobroma-systems.com> Acked-by: Philipp Tomsich <philipp.toms...@theobroma-systems.com> _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
