xref: /freebsd/sys/contrib/device-tree/Bindings/security/tpm/st33zp24-spi.txt (revision c66ec88fed842fbaad62c30d510644ceb7bd2d71)
1* STMicroelectronics SAS. ST33ZP24 TPM SoC
2
3Required properties:
4- compatible: Should be "st,st33zp24-spi".
5- spi-max-frequency: Maximum SPI frequency (<= 10000000).
6
7Optional ST33ZP24 Properties:
8- interrupts: GPIO interrupt to which the chip is connected
9- lpcpd-gpios: Output GPIO pin used for ST33ZP24 power management D1/D2 state.
10If set, power must be present when the platform is going into sleep/hibernate mode.
11
12Optional SoC Specific Properties:
13- pinctrl-names: Contains only one value - "default".
14- pintctrl-0: Specifies the pin control groups used for this controller.
15
16Example (for ARM-based BeagleBoard xM with ST33ZP24 on SPI4):
17
18&mcspi4 {
19
20
21        st33zp24@0 {
22
23                compatible = "st,st33zp24-spi";
24
25                spi-max-frequency = <10000000>;
26
27                interrupt-parent = <&gpio5>;
28                interrupts = <7 IRQ_TYPE_LEVEL_HIGH>;
29
30                lpcpd-gpios = <&gpio5 15 GPIO_ACTIVE_HIGH>;
31        };
32};
33