dt-bindings: tpm: Consolidate TCG TIS bindings

A significant number of Trusted Platform Modules conform to the "TIS"
specification published by the Trusted Computing Group ("TCG PC Client
Specific TPM Interface Specification").  These chips typically use an
SPI, I²C or LPC bus as transport (via MMIO in the latter case).  Some
of them even support multiple of those buses (selectable through a
config strap) or the same chip is available in multiple SKUs, each with
a different bus interface.

The devicetree bindings for these TPMs have not been converted to DT
schema yet and are spread out across 3 generic files and 2 chip-specific
files.  A few TPM compatible strings were added to trivial-devices.yaml
even though additional properties are documented in the plaintext
bindings.

Consolidate the devicetree bindings into 3 yaml files, one per bus.

Move common properties to a separate tpm-common.yaml.

Document compatible strings which are supported by the TPM TIS driver
but were neglected to be added to the devicetree bindings.

Document the memory-region property recently introduced by commit
1e2714bb83fc ("tpm: Add reserved memory event log").

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/953fd4c7519030db88e5b5e12ab6307414ebdd21.1702806810.git.lukas@wunner.de
Signed-off-by: Rob Herring <robh@kernel.org>

5 files changed, 0 insertions, 140 deletions

diff --git a/Documentation/devicetree/bindings/security/tpm/st33zp24-i2c.txt b/Documentation/devicetree/bindings/security/tpm/st33zp24-i2c.txt
deleted file mode 100644
index 0dc121b6eace..000000000000
--- a/Documentation/devicetree/bindings/security/tpm/st33zp24-i2c.txt
+++ /dev/null
@@ -1,34 +0,0 @@
-* STMicroelectronics SAS. ST33ZP24 TPM SoC
-
-Required properties:
-- compatible: Should be "st,st33zp24-i2c".
-- clock-frequency: I²C work frequency.
-- reg: address on the bus
-
-Optional ST33ZP24 Properties:
-- 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 I2C2):
-
-&i2c2 {
-
-
-        st33zp24: st33zp24@13 {
-
-                compatible = "st,st33zp24-i2c";
-
-                reg = <0x13>;
-                clock-frequency = <400000>;
-
-                interrupt-parent = <&gpio5>;
-                interrupts = <7 IRQ_TYPE_LEVEL_HIGH>;
-
-                lpcpd-gpios = <&gpio5 15 GPIO_ACTIVE_HIGH>;
-        };
-};
diff --git a/Documentation/devicetree/bindings/security/tpm/st33zp24-spi.txt b/Documentation/devicetree/bindings/security/tpm/st33zp24-spi.txt
deleted file mode 100644
index 37198971f17b..000000000000
--- a/Documentation/devicetree/bindings/security/tpm/st33zp24-spi.txt
+++ /dev/null
@@ -1,32 +0,0 @@
-* STMicroelectronics SAS. ST33ZP24 TPM SoC
-
-Required properties:
-- compatible: Should be "st,st33zp24-spi".
-- spi-max-frequency: Maximum SPI frequency (<= 10000000).
-
-Optional ST33ZP24 Properties:
-- 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 {
-
-
-        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>;
-        };
-};
diff --git a/Documentation/devicetree/bindings/security/tpm/tpm-i2c.txt b/Documentation/devicetree/bindings/security/tpm/tpm-i2c.txt
deleted file mode 100644
index a65d7b71e81a..000000000000
--- a/Documentation/devicetree/bindings/security/tpm/tpm-i2c.txt
+++ /dev/null
@@ -1,26 +0,0 @@
-* Device Tree Bindings for I2C based Trusted Platform Module(TPM)
-
-Required properties:
-
-- compatible     : 'manufacturer,model', eg. nuvoton,npct650
-- label          : human readable string describing the device, eg. "tpm"
-- linux,sml-base : 64-bit base address of the reserved memory allocated for
-                   the firmware event log
-- linux,sml-size : size of the memory allocated for the firmware event log
-
-Optional properties:
-
-- powered-while-suspended: present when the TPM is left powered on between
-                           suspend and resume (makes the suspend/resume
-                           callbacks do nothing).
-
-Example (for OpenPower Systems with Nuvoton TPM 2.0 on I2C)
-----------------------------------------------------------
-
-tpm@57 {
-	reg = <0x57>;
-	label = "tpm";
-	compatible = "nuvoton,npct650", "nuvoton,npct601";
-	linux,sml-base = <0x7f 0xfd450000>;
-	linux,sml-size = <0x10000>;
-};
diff --git a/Documentation/devicetree/bindings/security/tpm/tpm_tis_mmio.txt b/Documentation/devicetree/bindings/security/tpm/tpm_tis_mmio.txt
deleted file mode 100644
index 7c6304426da1..000000000000
--- a/Documentation/devicetree/bindings/security/tpm/tpm_tis_mmio.txt
+++ /dev/null
@@ -1,25 +0,0 @@
-Trusted Computing Group MMIO Trusted Platform Module
-
-The TCG defines multi vendor standard for accessing a TPM chip, this
-is the standard protocol defined to access the TPM via MMIO. Typically
-this interface will be implemented over Intel's LPC bus.
-
-Refer to the 'TCG PC Client Specific TPM Interface Specification (TIS)' TCG
-publication for the specification.
-
-Required properties:
-
-- compatible: should contain a string below for the chip, followed by
-              "tcg,tpm-tis-mmio". Valid chip strings are:
-	          * "atmel,at97sc3204"
-- reg: The location of the MMIO registers, should be at least 0x5000 bytes
-- interrupts: An optional interrupt indicating command completion.
-
-Example:
-
-	tpm_tis@90000 {
-				compatible = "atmel,at97sc3204", "tcg,tpm-tis-mmio";
-				reg = <0x90000 0x5000>;
-				interrupt-parent = <&EIC0>;
-				interrupts = <1 2>;
-	};
diff --git a/Documentation/devicetree/bindings/security/tpm/tpm_tis_spi.txt b/Documentation/devicetree/bindings/security/tpm/tpm_tis_spi.txt
deleted file mode 100644
index b800667da92b..000000000000
--- a/Documentation/devicetree/bindings/security/tpm/tpm_tis_spi.txt
+++ /dev/null
@@ -1,23 +0,0 @@
-Required properties:
-- compatible: should be one of the following
-    "st,st33htpm-spi"
-    "infineon,slb9670"
-    "tcg,tpm_tis-spi"
-- spi-max-frequency: Maximum SPI frequency (depends on TPMs).
-
-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 TPM_TIS on SPI4):
-
-&mcspi4 {
-
-
-        tpm_tis@0 {
-
-                compatible = "tcg,tpm_tis-spi";
-
-                spi-max-frequency = <10000000>;
-        };
-};