TDA2HG: Is it possible that SD card init skip 1.8v switch?

Tim-ckt1010

Part Number: TDA2HG

Hi,

My board use fixed 3.3v regulator supply SD card, but kernel always try to switch it to 1.8v on init stage. And it of cause will failed. Please check log below:

[  525.707260] omap_hsmmc 4809c000.mmc: vmmc_aux set voltage failed
[  525.713296] omap_hsmmc 4809c000.mmc: failed to switch 1.8v
[  525.760283] mmc0: error -110 whilst initialising SD card

So can I skip it?

Thanks a lot!

over 6 years ago

0 Vishal Mahaveer over 6 years ago

TI__Mastermind 34120 points

Hi,

Which SDK version are you using?
Could you also share the mmc portion of dts?

Regards,
Vishal

0 Tim-ckt1010 over 6 years ago in reply to Vishal Mahaveer

Expert 1685 points

Hi Vishal,

SDK version: 3.5

dts:

evm_3v3_sd: fixedregulator-sd {
	compatible = "regulator-fixed";
	regulator-name = "evm_3v3_sd";
	regulator-min-microvolt = <3300000>;
	regulator-max-microvolt = <3300000>;
	regulator-always-on;
	regulator-boot-on;
};

&mmc1 {
	status = "okay";
	vmmc-supply = <&evm_3v3_sd>;
	vmmc_aux-supply = <&evm_3v3_sd>;
	bus-width = <4>;
	/*
	 * SDCD signal is not being used here - using the fact that GPIO mode
	 * is always hardwired.
	 */
	cd-gpios = <&gpio6 27 GPIO_ACTIVE_LOW>;
	max-frequency = <192000000>;
	pinctrl-names = "default", "hs", "sdr12", "sdr25", "sdr50", "ddr50-rev11", "sdr104-rev11", "ddr50", "sdr104";
	pinctrl-0 = <&mmc1_pins_default>;
	pinctrl-1 = <&mmc1_pins_hs>;
	pinctrl-2 = <&mmc1_pins_sdr12>;
	pinctrl-3 = <&mmc1_pins_sdr25>;
	pinctrl-4 = <&mmc1_pins_sdr50>;
	pinctrl-5 = <&mmc1_pins_ddr50 &mmc1_iodelay_ddr50_rev11_conf>;
	pinctrl-6 = <&mmc1_pins_sdr104 &mmc1_iodelay_sdr104_rev11_conf>;
	pinctrl-7 = <&mmc1_pins_ddr50 &mmc1_iodelay_ddr50_rev20_conf>;
	pinctrl-8 = <&mmc1_pins_sdr104 &mmc1_iodelay_sdr104_rev20_conf>;
};

0 Vishal Mahaveer over 6 years ago in reply to Tim-ckt1010

TI__Mastermind 34120 points

Hi,

Can you try adding below lines to mmc1 node and test?

/delete-property/ ti,dual-volt;

Regards,
Vishal

0 Vishal Mahaveer over 6 years ago in reply to Vishal Mahaveer

TI__Mastermind 34120 points

Also add below property
no-1-8-v;

0 Tim-ckt1010 over 6 years ago in reply to Vishal Mahaveer

Expert 1685 points

Great! It works! Thanks a lot!

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TDA2HG: Is it possible that SD card init skip 1.8v switch?