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[1/7] dt-bindings: tpm: Introduce trivial-tpms.yaml

Message ID 20220930165116.13329-2-Alexander.Steffen@infineon.com
State New
Headers show
Series [1/7] dt-bindings: tpm: Introduce trivial-tpms.yaml | expand

Commit Message

Alexander Steffen Sept. 30, 2022, 4:51 p.m. UTC 
Most TPM devices are very similar and only need a few common properties
to describe them. However, they may use more properties than other
trivial I2C or SPI devices, e.g. powered-while-suspended. Therefore,
move them to their own trivial-tpms.yaml.

Signed-off-by: Alexander Steffen <Alexander.Steffen@infineon.com>
---
 .../bindings/security/tpm/trivial-tpms.yaml   | 54 +++++++++++++++++++
 .../devicetree/bindings/trivial-devices.yaml  | 16 ------
 2 files changed, 54 insertions(+), 16 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/security/tpm/trivial-tpms.yaml
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Patch

diff --git a/Documentation/devicetree/bindings/security/tpm/trivial-tpms.yaml b/Documentation/devicetree/bindings/security/tpm/trivial-tpms.yaml
new file mode 100644
index 000000000000..fadd4ca96554
--- /dev/null
+++ b/Documentation/devicetree/bindings/security/tpm/trivial-tpms.yaml
@@ -0,0 +1,54 @@ 
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/security/tpm/trivial-tpms.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Trivial TPM devices that have simple device tree bindings
+
+maintainers:
+  - linux-integrity@vger.kernel.org
+
+description: |
+  This is a list of trivial TPM devices that share the same properties and
+  therefore have simple device tree bindings.
+
+  If a device needs more specific bindings, such as properties to
+  describe some aspect of it, there needs to be a specific binding
+  document for it just like any other devices.
+
+properties:
+  reg:
+    maxItems: 1
+  interrupts:
+    maxItems: 1
+
+  spi-max-frequency: true
+
+  compatible:
+    contains:
+      enum:
+          # i2c trusted platform module (TPM)
+        - atmel,at97sc3204t
+          # Infineon SLB9635 (Soft-) I2C TPM (old protocol, max 100khz)
+        - infineon,slb9635tt
+          # Infineon SLB9645 I2C TPM (new protocol, max 400khz)
+        - infineon,slb9645tt
+          # Infineon SLB9673 I2C TPM 2.0
+        - infineon,slb9673
+          # i2c trusted platform module (TPM)
+        - nuvoton,npct501
+          # i2c trusted platform module (TPM2)
+        - nuvoton,npct601
+          # Socionext SynQuacer TPM MMIO module
+        - socionext,synquacer-tpm-mmio
+          # i2c trusted platform module (TPM)
+        - winbond,wpct301
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+...
diff --git a/Documentation/devicetree/bindings/trivial-devices.yaml b/Documentation/devicetree/bindings/trivial-devices.yaml
index 61746755c107..1cc7f82c0822 100644
--- a/Documentation/devicetree/bindings/trivial-devices.yaml
+++ b/Documentation/devicetree/bindings/trivial-devices.yaml
@@ -47,8 +47,6 @@  properties:
           - ams,iaq-core
             # i2c serial eeprom (24cxx)
           - at,24c08
-            # i2c trusted platform module (TPM)
-          - atmel,at97sc3204t
             # ATSHA204 - i2c h/w symmetric crypto module
           - atmel,atsha204
             # ATSHA204A - i2c h/w symmetric crypto module
@@ -135,12 +133,6 @@  properties:
           - infineon,ir38164
             # Infineon IR38263 Voltage Regulator
           - infineon,ir38263
-            # Infineon SLB9635 (Soft-) I2C TPM (old protocol, max 100khz)
-          - infineon,slb9635tt
-            # Infineon SLB9645 I2C TPM (new protocol, max 400khz)
-          - infineon,slb9645tt
-            # Infineon SLB9673 I2C TPM 2.0
-          - infineon,slb9673
             # Infineon TLV493D-A1B6 I2C 3D Magnetic Sensor
           - infineon,tlv493d-a1b6
             # Infineon Multi-phase Digital VR Controller xdpe11280
@@ -289,10 +281,6 @@  properties:
           - national,lm85
             # I2C ±0.33°C Accurate, 12-Bit + Sign Temperature Sensor and Thermal Window Comparator
           - national,lm92
-            # i2c trusted platform module (TPM)
-          - nuvoton,npct501
-            # i2c trusted platform module (TPM2)
-          - nuvoton,npct601
             # Nuvoton Temperature Sensor
           - nuvoton,w83773g
             # OKI ML86V7667 video decoder
@@ -327,8 +315,6 @@  properties:
           - silabs,si7020
             # Skyworks SKY81452: Six-Channel White LED Driver with Touch Panel Bias Supply
           - skyworks,sky81452
-            # Socionext SynQuacer TPM MMIO module
-          - socionext,synquacer-tpm-mmio
             # SparkFun Qwiic Joystick (COM-15168) with i2c interface
           - sparkfun,qwiic-joystick
             # i2c serial eeprom (24cxx)
@@ -383,8 +369,6 @@  properties:
           - winbond,w83793
             # Vicor Corporation Digital Supervisor
           - vicor,pli1209bc
-            # i2c trusted platform module (TPM)
-          - winbond,wpct301
 
 required:
   - compatible