Issue in U-boot SPI driver initialization

kanimozhi_t — Fri, 15 Sep 2023 13:05:26 GMT

Hi Team,

                We are facing issue will initializing SPI driver in u-boot while i2c drivers seems to be working fine by default.
                Basically we were trying to bringup TPM device via SPI interface at u-boot.
                We have done the same changes for linux kernel we could communicate with TPM on linux kernel, same we are trying to do on u-boot.

Changes we have done:
u-boot-imx/arch/arm/dts/imx8mm-evk.dtsi

&ecspi2 { #address-cells = <1>; #size-cells = <0>; fsl,spi-num-chipselects = <1>; pinctrl-names = "default"; pinctrl-0 = <&pinctrl_ecspi2 &pinctrl_ecspi2_cs>; cs-gpios = <&gpio5 13 GPIO_ACTIVE_LOW>; status = "okay"; tpm0: slb9670@0 { compatible = "tcg,tpm_tis-spi"; spi-max-frequency = <10000000>; reg = <0>; status = "okay"; }; };

In u-boot-imx/arch/arm/dts/imx8mm.dtsi:
we observe that compatiblility for spi --> fsl,imx51-ecspi

so we have added debug prints to check whether SPI is initialized at /u-boot-imx/drivers/spi/mxc_spi.c
in func --> mxc_spi_probe(struct udevice *bus).

But we couldn't see any debug prints at u-boot we have added.
But i2c_probe function gets invoked.

Please clarify us the issue.

Thanks,
Kanimozhi

Re: Issue in U-boot SPI driver initialization

Bio_TICFSL — Fri, 15 Sep 2023 15:11:23 GMT

Hello,

Which print are you referring to? since you modify the code you have to build it, then burn again your board with the bootloader.

Regards

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Issue in U-boot SPI driver initialization

Re: Issue in U-boot SPI driver initialization