[BBB] Infineon SLB9670 not detected - SPI1 CS1

General Discussion
1

Hi all,
In my project I have connected both ENC28J60 PHY and TPM2.0 SLB9670 to SPI1 bus. First one uses CS0 (mode 3), and second one CS1 (mode 2) connected to P9_42 pin. Here is my overlay:

/dts-v1/;
/plugin/;

/ {
    compatible = "ti,beaglebone", "ti,beaglebone-black";

    part-number = "BB-SPI1-ENC28J60";
    version = "00A0";

    fragment@0 {
        target = <&am33xx_pinmux>;
        __overlay__ {
            pinmux_spi1_pins: pinmux_spi1_pins {
                pinctrl-single,pins = <
		    0x190 0x33  /* spi1_sclk,MODE3 */
                    0x194 0x33  /* spi1_d0,  MODE3 */
                    0x198 0x33  /* spi1_d1,  MODE3 */
                   >;
          };
	    pinmux_eth_pins: pinmux_eth_pins {
             	pinctrl-single,pins = <
		    0x19C 0x33  /* spi1_cs0, MODE3 */
		    0x1AC 0x37  /* INT, MODE7 */
                    0x028 0x37  /* RST, MODE7 */
		>;
            };

	    pinmux_tpm_pins: pinmux_tpm_pins {
		pinctrl-single,pins = <
		    0x164 0x32  /* spi1_cs1, MODE2 */
		    0x024 0x37  /* IRQ, MODE7 */
		    0x09C 0x37  /* RST, MODE7 */
                >;
	    };
	   
	};
    };

    fragment@1 {
        target = <&spi1>;
        __overlay__ {
            #address-cells = <1>;
            #size-cells = <0>;
	    status = "okay";
	    pinctrl-0 = <&pinmux_spi1_pins>;
	    pinctrl-names = "default";	
            
            enc28j60:  enc28j60@0 {
                compatible = "microchip,enc28j60";
                reg = <0>; /* Chip select 0 */
                symlink = "bone/spi/1.0";
		pinctrl-names = "default";
		pinctrl-0 = <&pinmux_eth_pins>;
                interrupt-parent = <&gpio3>;
                interrupts = <21 0x02>; /* P9_25, falling edge */
                spi-max-frequency = <16000000>;              
            };

	    slb9670: slb9670@1 {
                compatible = "infineon,slb9670";
		reg = <1>;
		symlink = "bone/spi/1.1";
		pinctrl-names = "default";
                pinctrl-0 = <&pinmux_tpm_pins>;
                interrupt-parent = <&gpio0>;
                interrupts = <23 0x2>; /* IRQ */
		spi-max-frequency = <24000000>;
            };
        };
    };
};

Here are some logs indicating that ENC28J60 is working but TPM not:

iotlab@iotlab:~ $ dmesg | grep -i spi1.0
[    2.247896] enc28j60 spi1.0: Ethernet driver 1.02 loaded
[    6.512152] enc28j60 spi1.0 eth1: link down
[    6.516651] enc28j60 spi1.0 eth1: multicast mode
[    6.521499] enc28j60 spi1.0 eth1: multicast mode
[    8.809323] enc28j60 spi1.0 eth1: link up - Half duplex
[    8.850178] enc28j60 spi1.0 eth1: multicast mode
[    8.980516] enc28j60 spi1.0 eth1: link down
[   11.226493] enc28j60 spi1.0 eth1: link up - Half duplex
iotlab@iotlab:~ $ dmesg | grep -i spi1.1
iotlab@iotlab:~ $ dmesg | grep -i tpm

Driver for ENC28J60 is binded to SPI1.0:

iotlab@iotlab:/sys/bus/spi/drivers/enc28j60 $ ls
bind    spi1.0  uevent  unbind

Driver for SLB9670 is not binded to SPI1.1:

iotlab@iotlab:/sys/bus/spi/drivers/tpm_tis_spi $ ls
bind    uevent  unbind

Both SPI1 devices are present:

iotlab@iotlab:/sys/bus/spi/devices $ ls
spi1.0  spi1.1

Can someone point me what I am missing to have my TPM working ?
Kernel version: 6.1.33

Thanks a lot!

2

Hi, I simplified my overlay to just include TPM optiga SLB9760 from Infineon

/dts-v1/;
/plugin/;

/ {
    compatible = "ti,beaglebone","ti,am335x-boneblack", "ti,beaglebone-black";

    part-number = "BB-SPI1-ENC28J60";
    version = "00A0";

    fragment@0 {
        target = <&am33xx_pinmux>;
        __overlay__ {
            pinmux_spi1_pins: pinmux_spi1_pins {
                pinctrl-single,pins = <
		    0x190 0x33  /* spi1_sclk,MODE3 */
                    0x194 0x33  /* spi1_d0,  MODE3 */
                    0x198 0x33  /* spi1_d1,  MODE3 */
		    0x164 0x32  /* spi1_cs1, MODE2 */
                   >;
             };
	};
    };

    fragment@1 {
	target = <&spi1>;
	__overlay__ {
	pinctrl-0 = <&pinmux_spi1_pins>;
	status = "okay";
	};
    };

    fragment@2 {
        target = <&spi1>;
        __overlay__ {
            #address-cells = <1>;
            #size-cells = <0>;
            slb9670: slb9670@1 {
                compatible = "infineon,slb9670";
                reg = <1>;
		#address-cells = <1>;
                #size-cells = <0>;
		spi-max-frequency = <32000000>;
            };
        };
    };
};

This is error I am getting:

$ dmesg | grep spi
[ 2.251738] tpm_tis_spi: probe of spi1.1 failed with error -110

Can someone provide some guidance?
Thanks

3

Hi,
Does anyone have time to reviews?
Thanks!