kernel/Documentation/devicetree/bindings/security/tpm/st33zp24-spi.txt

   1 * STMicroelectronics SAS. ST33ZP24 TPM SoC
   2
   3 Required properties:
   4 - compatible: Should be "st,st33zp24-spi".
   5 - spi-max-frequency: Maximum SPI frequency (<= 10000000).
   6
   7 Optional ST33ZP24 Properties:
   8 - interrupt-parent: phandle for the interrupt gpio controller
   9 - interrupts: GPIO interrupt to which the chip is connected
  10 - lpcpd-gpios: Output GPIO pin used for ST33ZP24 power management D1/D2 state.
  11 If set, power must be present when the platform is going into sleep/hibernate mode.
  12
  13 Optional SoC Specific Properties:
  14 - pinctrl-names: Contains only one value - "default".
  15 - pintctrl-0: Specifies the pin control groups used for this controller.
  16
  17 Example (for ARM-based BeagleBoard xM with ST33ZP24 on SPI4):
  18
  19 &mcspi4 {
  20
  21         status = "okay";
  22
  23         st33zp24@0 {
  24
  25                 compatible = "st,st33zp24-spi";
  26
  27                 spi-max-frequency = <10000000>;
  28
  29                 interrupt-parent = <&gpio5>;
  30                 interrupts = <7 IRQ_TYPE_LEVEL_HIGH>;
  31
  32                 lpcpd-gpios = <&gpio5 15 GPIO_ACTIVE_HIGH>;
  33         };
  34 };