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arm64: dts: imx8mq: Fix boot from eMMC 

The boot from eMMC is currently broken on the NXP i.MX8MQ EVK board.
When trying to boot from eMMC it fails with:

...
[    1.271938] mmc1: Tuning failed, falling back to fixed sampling clock
[    1.287429] print_req_error: I/O error, dev mmcblk1, sector 1 flags 0
[    1.306833] mmc1: Tuning failed, falling back to fixed sampling clock
[    1.322325] print_req_error: I/O error, dev mmcblk1, sector 2 flags 0
[    1.329559] Buffer I/O error on dev mmcblk1, logical block 0, async page read
[    1.336714]  mmcblk1: unable to read partition table
...

The problem is the result of a partial misconfiguration of the pins and
the missing assigned clock rate.

Fixes: 9079aca4aa ("arm64: add support for i.MX8M EVK board")
Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Tested-by: Chris Spencer <christopher.spencer@sea.co.uk>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Carlo Caione 2019-01-25 13:55:58 +00:00 committed by Shawn Guo
parent c5b11ee9f1
commit f2ce6ed3dc
2 changed files with 24 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
arch/arm64/boot/dts/freescale/imx8mq-evk.dts
View File

@ -227,34 +227,34 @@
pinctrl_usdhc1_100mhz: usdhc1-100grp {
fsl,pins = <
MX8MQ_IOMUXC_SD1_CLK_USDHC1_CLK 0x85
MX8MQ_IOMUXC_SD1_CMD_USDHC1_CMD 0xc5
MX8MQ_IOMUXC_SD1_DATA0_USDHC1_DATA0 0xc5
MX8MQ_IOMUXC_SD1_DATA1_USDHC1_DATA1 0xc5
MX8MQ_IOMUXC_SD1_DATA2_USDHC1_DATA2 0xc5
MX8MQ_IOMUXC_SD1_DATA3_USDHC1_DATA3 0xc5
MX8MQ_IOMUXC_SD1_DATA4_USDHC1_DATA4 0xc5
MX8MQ_IOMUXC_SD1_DATA5_USDHC1_DATA5 0xc5
MX8MQ_IOMUXC_SD1_DATA6_USDHC1_DATA6 0xc5
MX8MQ_IOMUXC_SD1_DATA7_USDHC1_DATA7 0xc5
MX8MQ_IOMUXC_SD1_STROBE_USDHC1_STROBE 0x85
MX8MQ_IOMUXC_SD1_CLK_USDHC1_CLK 0x8d
MX8MQ_IOMUXC_SD1_CMD_USDHC1_CMD 0xcd
MX8MQ_IOMUXC_SD1_DATA0_USDHC1_DATA0 0xcd
MX8MQ_IOMUXC_SD1_DATA1_USDHC1_DATA1 0xcd
MX8MQ_IOMUXC_SD1_DATA2_USDHC1_DATA2 0xcd
MX8MQ_IOMUXC_SD1_DATA3_USDHC1_DATA3 0xcd
MX8MQ_IOMUXC_SD1_DATA4_USDHC1_DATA4 0xcd
MX8MQ_IOMUXC_SD1_DATA5_USDHC1_DATA5 0xcd
MX8MQ_IOMUXC_SD1_DATA6_USDHC1_DATA6 0xcd
MX8MQ_IOMUXC_SD1_DATA7_USDHC1_DATA7 0xcd
MX8MQ_IOMUXC_SD1_STROBE_USDHC1_STROBE 0x8d
MX8MQ_IOMUXC_SD1_RESET_B_USDHC1_RESET_B 0xc1
>;
};
pinctrl_usdhc1_200mhz: usdhc1-200grp {
fsl,pins = <
MX8MQ_IOMUXC_SD1_CLK_USDHC1_CLK 0x87
MX8MQ_IOMUXC_SD1_CMD_USDHC1_CMD 0xc7
MX8MQ_IOMUXC_SD1_DATA0_USDHC1_DATA0 0xc7
MX8MQ_IOMUXC_SD1_DATA1_USDHC1_DATA1 0xc7
MX8MQ_IOMUXC_SD1_DATA2_USDHC1_DATA2 0xc7
MX8MQ_IOMUXC_SD1_DATA3_USDHC1_DATA3 0xc7
MX8MQ_IOMUXC_SD1_DATA4_USDHC1_DATA4 0xc7
MX8MQ_IOMUXC_SD1_DATA5_USDHC1_DATA5 0xc7
MX8MQ_IOMUXC_SD1_DATA6_USDHC1_DATA6 0xc7
MX8MQ_IOMUXC_SD1_DATA7_USDHC1_DATA7 0xc7
MX8MQ_IOMUXC_SD1_STROBE_USDHC1_STROBE 0x87
MX8MQ_IOMUXC_SD1_CLK_USDHC1_CLK 0x9f
MX8MQ_IOMUXC_SD1_CMD_USDHC1_CMD 0xdf
MX8MQ_IOMUXC_SD1_DATA0_USDHC1_DATA0 0xdf
MX8MQ_IOMUXC_SD1_DATA1_USDHC1_DATA1 0xdf
MX8MQ_IOMUXC_SD1_DATA2_USDHC1_DATA2 0xdf
MX8MQ_IOMUXC_SD1_DATA3_USDHC1_DATA3 0xdf
MX8MQ_IOMUXC_SD1_DATA4_USDHC1_DATA4 0xdf
MX8MQ_IOMUXC_SD1_DATA5_USDHC1_DATA5 0xdf
MX8MQ_IOMUXC_SD1_DATA6_USDHC1_DATA6 0xdf
MX8MQ_IOMUXC_SD1_DATA7_USDHC1_DATA7 0xdf
MX8MQ_IOMUXC_SD1_STROBE_USDHC1_STROBE 0x9f
MX8MQ_IOMUXC_SD1_RESET_B_USDHC1_RESET_B 0xc1
>;
};

2
arch/arm64/boot/dts/freescale/imx8mq.dtsi
View File

@ -360,6 +360,8 @@
<&clk IMX8MQ_CLK_NAND_USDHC_BUS>,
<&clk IMX8MQ_CLK_USDHC1_ROOT>;
clock-names = "ipg", "ahb", "per";
assigned-clocks = <&clk IMX8MQ_CLK_USDHC1>;
assigned-clock-rates = <400000000>;
fsl,tuning-start-tap = <20>;
fsl,tuning-step = <2>;
bus-width = <4>;