Hi, On 25/01/21 9:55 pm, Aswath Govindraju wrote: > The following speed modes are now supported in J7200 SoC, > - HS200 and HS400 modes at 1.8 V card voltage, in MMCSD0 subsystem [1]. > - UHS-I speed modes in MMCSD1 subsystem [1]. > > Set respective tags in sdhci0 and remove no-1-8-v tag from sdhci1 device > tree nodes. > > [1] - section 12.3.6.1.1 MMCSD Features, in > https://www.ti.com/lit/ug/spruiu1a/spruiu1a.pdf > > Signed-off-by: Aswath Govindraju <a-govindraju@xxxxxx> > --- > > performance test logs using EXT4 filesystem for eMMC HS400 speed mode, > https://pastebin.ubuntu.com/p/JnPs8DxV58/ > > performance test logs using EXT4 filesystem for SD SDR104 speed mode, > https://pastebin.ubuntu.com/p/KPGzBz8YwC/ > > Changes since v1: > - Squashed the two patches into one > - added performance logs for the above mentioned speed modes > > arch/arm64/boot/dts/ti/k3-j7200-main.dtsi | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi b/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi > index 4cc2e9094d0e..4b3d0b5739e8 100644 > --- a/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi > +++ b/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi > @@ -517,6 +517,8 @@ > ti,trm-icp = <0x8>; > bus-width = <8>; > mmc-ddr-1_8v; > + mmc-hs200-1_8v; > + mmc-hs400-1_8v; > dma-coherent; > }; > > @@ -534,7 +536,6 @@ > ti,otap-del-sel-sdr50 = <0xc>; > ti,otap-del-sel-sdr104 = <0x5>; > ti,otap-del-sel-ddr50 = <0xc>; > - no-1-8-v; > dma-coherent; > }; > > Please ignore this patch. Sorry, I forgot to add voltage regulator nodes required to enable UHS modes. While testing there was an error from my side. Thanks, Aswath
