diff options
| author | Heiko Stuebner | 2018-09-21 10:59:47 +0200 |
|---|---|---|
| committer | Philipp Tomsich | 2018-10-02 09:35:19 +0200 |
| commit | 598a26a8fb94b7b86ecd2f4762eb5fcf46b9664e (patch) | |
| tree | 3c014de1b037de69fae2d5bddb04a6464c34b89c /arch/arm/dts/rk3188-radxarock-u-boot.dtsi | |
| parent | 26a52f34734c5aec031c9884df521b657dc22886 (diff) | |
rockchip: rk3188: add u-boot-specific mmc properties
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>
Diffstat (limited to 'arch/arm/dts/rk3188-radxarock-u-boot.dtsi')
| -rw-r--r-- | arch/arm/dts/rk3188-radxarock-u-boot.dtsi | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/arm/dts/rk3188-radxarock-u-boot.dtsi b/arch/arm/dts/rk3188-radxarock-u-boot.dtsi index 013535abcd2..1bb5408592e 100644 --- a/arch/arm/dts/rk3188-radxarock-u-boot.dtsi +++ b/arch/arm/dts/rk3188-radxarock-u-boot.dtsi @@ -11,6 +11,21 @@ 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; |