Good afternoon TI community,
Thank you for all of your support so far in helping get our board up and running. I'm able to load SPL and u-boot from an SD card, and then begin loading the Linux kernel, but it hangs on the message "waiting for root device"
[ 1.726613] Waiting for root device PARTUUID=19b1aec4-02...
I've been reading through several of the existing posts and this seems to be related to an SD card detect problem. I'm able to successfully read from the SD card during u-boot because the bootloader doesn't use the SD card detect pin. I confirmed with a scope that the pin is high when unplugged, and pulled low when an SD card is inserted. At this stage, I would be ok disabling the SD card detect altogether but I haven't been able to do so successfully.
How can I completely disable checking the SD card detect pin in order to get around this error? Are there any kernel changes required? Why is it not detecting the SD card detect pin pulled low? Here's the relevant source in my dts file.
Thanks in advance!
Chris
sd_mmc_pins: sd_mmc_pins {
pinctrl-single,pins = <
....
0x138 ( PIN_INPUT | MUX_MODE7 ) /* (N16) gmii1_rxd2.gpio2[19] (CDn)*/
>;
};
vmmc2: fixedregulator@0 {
compatible = "regulator-fixed";
regulator-name = "vmmc2";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
};
&mmc2 {
pinctrl-names = "default";
pinctrl-0 = <&sd_mmc_pins>;
bus-width = <0x4>;
cd-gpios = <&gpio2 19 GPIO_ACTIVE_LOW>;
status = "okay";
vmmc-supply = <&vmmc2>;
/* ti,non-removable; */
/* broken-cd; */
};
