summaryrefslogtreecommitdiff
path: root/Documentation/devicetree/bindings/security
diff options
context:
space:
mode:
authorChristophe Ricard <christophe.ricard@gmail.com>2015-03-08 13:17:16 +0300
committerPeter Huewe <peterhuewe@gmx.de>2015-03-19 00:43:07 +0300
commit92a2c6b26b72a65714e8433bb0ee2ad1866df5cf (patch)
tree37f322cfe1ef3f35078f0e27bc3c2992f4257097 /Documentation/devicetree/bindings/security
parentf042a315ae65d37ddd429ed6f60f1f87fdd48125 (diff)
downloadlinux-92a2c6b26b72a65714e8433bb0ee2ad1866df5cf.tar.xz
tpm/st33zp24/dts/st33zp24-spi: Add dts documentation for st33zp24 spi phy
Reviewed-by: Jason Gunthorpe <jason.gunthorpe@obsidianresearch.com> Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Diffstat (limited to 'Documentation/devicetree/bindings/security')
-rw-r--r--Documentation/devicetree/bindings/security/tpm/st33zp24-spi.txt34
1 files changed, 34 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/security/tpm/st33zp24-spi.txt b/Documentation/devicetree/bindings/security/tpm/st33zp24-spi.txt
new file mode 100644
index 000000000000..158b0165e01c
--- /dev/null
+++ b/Documentation/devicetree/bindings/security/tpm/st33zp24-spi.txt
@@ -0,0 +1,34 @@
+* STMicroelectronics SAS. ST33ZP24 TPM SoC
+
+Required properties:
+- compatible: Should be "st,st33zp24-spi".
+- spi-max-frequency: Maximum SPI frequency (<= 10000000).
+
+Optional ST33ZP24 Properties:
+- interrupt-parent: phandle for the interrupt gpio controller
+- interrupts: GPIO interrupt to which the chip is connected
+- lpcpd-gpios: Output GPIO pin used for ST33ZP24 power management D1/D2 state.
+If set, power must be present when the platform is going into sleep/hibernate mode.
+
+Optional SoC Specific Properties:
+- pinctrl-names: Contains only one value - "default".
+- pintctrl-0: Specifies the pin control groups used for this controller.
+
+Example (for ARM-based BeagleBoard xM with ST33ZP24 on SPI4):
+
+&mcspi4 {
+
+ status = "okay";
+
+ st33zp24@0 {
+
+ compatible = "st,st33zp24-spi";
+
+ spi-max-frequency = <10000000>;
+
+ interrupt-parent = <&gpio5>;
+ interrupts = <7 IRQ_TYPE_LEVEL_HIGH>;
+
+ lpcpd-gpios = <&gpio5 15 GPIO_ACTIVE_HIGH>;
+ };
+};