On Sun, Feb 7, 2021 at 6:12 AM JeongHwan Kim
<frog007.kernel...@gmail.com> wrote:
>
> I found the pinmux state is differnet between the emmc boot and sd card boot.
> I set the spi0 pins (/ce, sclk, d1, d0) with MODE0 in am335x-bone-common.dtsi.
> When the board runs in sd card boot, the spi0 pins mode is MODE 0.
> but in emmc boot, the spi0 pins mode is MODE 7.
> So, in emmc boot mode, I cannot access to spi-nor flash.
>
> I set the pin mux state in am335x0-bone-common.dtsi like this:
>
> ........
>
> spi0_pins: spi0_pins {
> pinctrl-single,pins = <
> AM33XX_PADCONF(AM335X_PIN_SPI0_SCLK, PIN_INPUT_PULLUP, MUX_MODE0)
> AM33XX_PADCONF(AM335X_PIN_SPI0_D0, PIN_INPUT_PULLUP, MUX_MODE0)
> AM33XX_PADCONF(AM335X_PIN_SPI0_D1, PIN_OUTPUT_PULLUP, MUX_MODE0)
> AM33XX_PADCONF(AM335X_PIN_SPI0_CS0, PIN_OUTPUT_PULLUP, MUX_MODE0)
> >;
> };
> ...........
>
> &spi0 {
> pinctrl-name = "default";
> pinctrl-0 = <&spi0_pins>;
> status = "okay";
>
> spi-flash@0 {
> #address-cells = <0x1>;
> #size-cells = <0x1>;
> compatible = "jedec,spi-nor";
> reg = <0x0>;
> spi-max-frequency = <500000>;
> partition@0 {
> label = "partition1";
> reg = <0x0 0x10000>;
> };
> partition@200000 {
> label = "partition2";
> reg = <0x10000 0x10000>;
> };
> };
> };
>
> I don't know why the pin mode state is different between the emmc and sd card
> boot mode.
> Is there any factor to effect for the spi0 pins mode to differ beween emmc
> and sd card boot?
I'm betting your version of u-boot on the eMMC and microsd are different..
Regards,
--
Robert Nelson
https://rcn-ee.com/
--
For more options, visit http://beagleboard.org/discuss
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