]> git.dujemihanovic.xyz Git - u-boot.git/commitdiff
rockchip: rk3188: add u-boot-specific mmc properties
authorHeiko Stuebner <heiko@sntech.de>
Fri, 21 Sep 2018 08:59:47 +0000 (10:59 +0200)
committerPhilipp Tomsich <philipp.tomsich@theobroma-systems.com>
Tue, 2 Oct 2018 07:35:19 +0000 (09:35 +0200)
The dwmmc controllers on rk3188 do not have idma support, so need to
use the fifo-mode and it my tests they became confused and stopped
working if the frequency was to high.

While I only tested in somewhat bigger steps, 32MHz for example
hung the controller, while reducing it to 16MHz worked just fine
and is reasonably fast to load a kernel from mmc.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
arch/arm/dts/rk3188-radxarock-u-boot.dtsi

index 013535abcd2d226aaf2abae340c13cf1593bb6ff..1bb5408592e7e4d5c82aecc1985834e73956b012 100644 (file)
        u-boot,dm-spl;
 };
 
+&mmc0 {
+       fifo-mode;
+       max-frequency = <16000000>;
+};
+
+&mmc1 {
+       fifo-mode;
+       max-frequency = <16000000>;
+};
+
+&emmc {
+       fifo-mode;
+       max-frequency = <16000000>;
+};
+
 &uart2 {
        status = "okay";
        u-boot,dm-spl;