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.
Signed-off-by: Carlo Caione <ccaione@xxxxxxxxxxxx>
---
arch/arm64/boot/dts/freescale/imx8mq-evk.dts | 44 ++++++++++----------
arch/arm64/boot/dts/freescale/imx8mq.dtsi | 2 +
2 files changed, 24 insertions(+), 22 deletions(-)
diff --git a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
index 64acccc4bfcb..f74b13aa5aa5 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
@@ -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
>;
};
diff --git a/arch/arm64/boot/dts/freescale/imx8mq.dtsi b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
index 8e9d6d5ed7b2..b6d31499fb43 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
@@ -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>;
--
2.19.1
