xref: /freebsd/sys/contrib/device-tree/Bindings/security/tpm/st33zp24-i2c.txt (revision a0409676120c1e558d0ade943019934e0f15118d)
1* STMicroelectronics SAS. ST33ZP24 TPM SoC
2
3Required properties:
4- compatible: Should be "st,st33zp24-i2c".
5- clock-frequency: I²C work frequency.
6- reg: address on the bus
7
8Optional ST33ZP24 Properties:
9- interrupts: GPIO interrupt to which the chip is connected
10- lpcpd-gpios: Output GPIO pin used for ST33ZP24 power management D1/D2 state.
11If set, power must be present when the platform is going into sleep/hibernate mode.
12
13Optional SoC Specific Properties:
14- pinctrl-names: Contains only one value - "default".
15- pintctrl-0: Specifies the pin control groups used for this controller.
16
17Example (for ARM-based BeagleBoard xM with ST33ZP24 on I2C2):
18
19&i2c2 {
20
21
22        st33zp24: st33zp24@13 {
23
24                compatible = "st,st33zp24-i2c";
25
26                reg = <0x13>;
27                clock-frequency = <400000>;
28
29                interrupt-parent = <&gpio5>;
30                interrupts = <7 IRQ_TYPE_LEVEL_HIGH>;
31
32                lpcpd-gpios = <&gpio5 15 GPIO_ACTIVE_HIGH>;
33        };
34};
35