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Create tpm-slb9673-overlay.dts

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Raziel K. Crowe 2022-09-09 13:48:16 +05:00
parent c5cca71543
commit feadabd29b
1 changed files with 50 additions and 0 deletions
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arch/arm/boot/dts/overlays/tpm-slb9673-overlay.dts Normal file
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/*
* Device Tree overlay for the Infineon SLB9673 Trusted Platform Module add-on
* boards, which can be used as a secure key storage and hwrng.
*/
/dts-v1/;
/plugin/;
/ {
compatible = "brcm,bcm2835";
/* Due to issue https://github.com/raspberrypi/linux/issues/4884 the
hardware I2C needs to be disabled and software I2C enabled */
fragment@0 {
target = <&i2c_arm>;
__overlay__ {
status = "disabled";
};
};
fragment@1 {
target-path = "/";
__overlay__ {
i2c1: i2c-gpio@1 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "i2c-gpio";
gpios = <&gpio 2 6>, /* SDA GPIO_OPEN_DRAIN */
<&gpio 3 6>; /* CLK GPIO_OPEN_DRAIN */
clock-frequency = <400000>;
status = "okay";
};
};
};
/* Add the TPM */
fragment@2 {
target = <&i2c1>;
__overlay__ {
#address-cells = <1>;
#size-cells = <0>;
slb9673: slb9673@2e {
compatible = "infineon,slb9673", "tcg,tpm-tis-i2c";
reg = <0x2e>;
status = "okay";
};
};
};
};