> -----Original Message----- > From: Lucas Stach [mailto:l.stach@xxxxxxxxxxxxxx] > Sent: Friday, February 23, 2018 11:45 PM > To: Shawn Guo <shawnguo@xxxxxxxxxx> > Cc: Rob Herring <robh+dt@xxxxxxxxxx>; Mark Rutland > <mark.rutland@xxxxxxx>; Catalin Marinas <catalin.marinas@xxxxxxx>; Will > Deacon <will.deacon@xxxxxxx>; Fabio Estevam <fabio.estevam@xxxxxxx>; > dl-linux-imx <linux-imx@xxxxxxx>; devicetree@xxxxxxxxxxxxxxx; linux-arm- > kernel@xxxxxxxxxxxxxxxxxxx; kernel@xxxxxxxxxxxxxx; patchwork- > lst@xxxxxxxxxxxxxx; A.s. Dong <aisheng.dong@xxxxxxx>; Baruch Siach > <baruch@xxxxxxxxxx> > Subject: Re: [PATCH v2 3/4] arm64: add support for i.MX8M EVK board > > Am Freitag, den 23.02.2018, 23:03 +0800 schrieb Shawn Guo: > > On Thu, Feb 01, 2018 at 07:31:25PM +0100, Lucas Stach wrote: > > > +&usdhc1 { > > > + pinctrl-names = "default", "state_100mhz", "state_200mhz"; > > > + pinctrl-0 = <&pinctrl_usdhc1_cd_reset>, > > > <&pinctrl_usdhc1_clk_strobe>, > > > + <&pinctrl_usdhc1_data>; > > > + pinctrl-1 = <&pinctrl_usdhc1_cd_reset>, > > > + <&pinctrl_usdhc1_clk_strobe_100mhz>, > > > + <&pinctrl_usdhc1_data_100mhz>; > > > + pinctrl-2 = <&pinctrl_usdhc1_cd_reset>, > > > + <&pinctrl_usdhc1_clk_strobe_200mhz>, > > > + <&pinctrl_usdhc1_data_200mhz>; > > > + vqmmc-supply = <&sw4_reg>; > > > + bus-width = <8>; > > > + non-removable; > > > + no-sd; > > > + no-sdio; > > > + status = "okay"; > > > +}; > > > > I'm not sure it can be enabled right now. Per my testing, eMMC is not > > working yet. > > > > [ 0.879756] mmc0: Switching to 3.3V signalling voltage failed [ > > 0.913587] mmc0: SDHCI controller on 30b40000.usdhc [30b40000.usdhc] > > using ADMA ... > > [ 1.007628] mmc0: switch to high-speed from hs200 failed, err:-110 > > [ 1.013873] mmc0: error -110 whilst initialising MMC card [ > > 1.020639] mmc0: Switching to 3.3V signalling voltage failed ... > > [ 1.132462] mmc0: switch to high-speed from hs200 failed, err:-110 > > [ 1.138674] mmc0: error -110 whilst initialising MMC card [ > > 1.145394] mmc0: Switching to 3.3V signalling voltage failed [ > > 1.268367] mmc0: switch to high-speed from hs200 failed, err:-110 [ > > 1.274576] mmc0: error -110 whilst initialising MMC card [ 1.281291] > > mmc0: Switching to 3.3V signalling voltage failed [ 1.440708] mmc0: > > switch to high-speed from hs200 failed, err:-110 [ 1.446919] mmc0: > > error -110 whilst initialising MMC card > > > > Or am I missing anything? > > This is something I need to look into. The HS200 switching sequence seems to > try to switch to 3.3V HS mode intermediately, which doesn't work. The switching to 3.3v seems to happen in mmc_power_up. As mx8mq evk board eMMC is fixed to 1.8V, I guess this probably will not cause any real issue rather than a WARNING. > Despite > the error messages eMMC works fine in my testing. It's strange that It did not work at Shawn's and my side. Regards Dong Aisheng > > Regards, > Lucas ��.n��������+%������w��{.n����z�{��ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
