> -----Original Message----- > From: Giulio Benetti <giulio.benetti@xxxxxxxxxxxxxxxxxxxxxx> > Sent: 2022年10月18日 7:56 > To: devicetree@xxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; > linux-kernel@xxxxxxxxxxxxxxx; linux-clk@xxxxxxxxxxxxxxx; > linux-mmc@xxxxxxxxxxxxxxx > Cc: Stephen Boyd <sboyd@xxxxxxxxxx>; Bough Chen <haibo.chen@xxxxxxx>; > Adrian Hunter <adrian.hunter@xxxxxxxxx>; Ulf Hansson > <ulf.hansson@xxxxxxxxxx>; Giulio Benetti > <giulio.benetti@xxxxxxxxxxxxxxxxxxxxxx> > Subject: [PATCH 4/5] ARM: dts: imxrt1050: remove mmc max-frequency > property > > According to i.MXRT1050 Reference Manual usdhc supports up to 208Mhz clock Please double check this. As I know, the i.MXRT1050 and i.MX6/7/8/9 series use the same usdhc IP, maybe include some small difference. For the usdhc in i.MX6/7/8/9, I confirmed with IC team, the card clock output from usdhc can't be upper than 200MHz, otherwise maybe meet some stable related issue. So here I think should change to like this: max-frequency = <200000000>; Best Regards Haibo Chen > so let's remove max-frequency property in the .dtsi base file and in case add > that property in the board specific .dts file for a specific device connected to it. > > Signed-off-by: Giulio Benetti <giulio.benetti@xxxxxxxxxxxxxxxxxxxxxx> > --- > arch/arm/boot/dts/imxrt1050.dtsi | 1 - > 1 file changed, 1 deletion(-) > > diff --git a/arch/arm/boot/dts/imxrt1050.dtsi > b/arch/arm/boot/dts/imxrt1050.dtsi > index 114465e4dde6..0b44cc4ce6ad 100644 > --- a/arch/arm/boot/dts/imxrt1050.dtsi > +++ b/arch/arm/boot/dts/imxrt1050.dtsi > @@ -93,7 +93,6 @@ usdhc1: mmc@402c0000 { > bus-width = <4>; > fsl,wp-controller; > no-1-8-v; > - max-frequency = <4000000>; > fsl,tuning-start-tap = <20>; > fsl,tuning-step = <2>; > status = "disabled"; > -- > 2.34.1