[PATCH v2 0/3] tpm: tsi-i2c: Add compatible strings

[PATCH v2 0/3] tpm: tsi-i2c: Add compatible strings

[Joel Stanley]

v2 removes the string from trivial devices and changes some of the
strings in the bindings.

Joel Stanley (2):
  dt-bindings: trivial-devices: Remove Infineon SLB9673 TPM
  tpm: tis-i2c: Add more compatible strings

Johannes Holland (1):
  dt-bindings: tpm: Add schema for TIS I2C devices

 drivers/char/tpm/tpm_tis_i2c.c                |  2 +
 .../bindings/security/tpm/tpm-tis-i2c.yaml    | 50 +++++++++++++++++++
 .../devicetree/bindings/trivial-devices.yaml  |  2 -
 3 files changed, 52 insertions(+), 2 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/security/tpm/tpm-tis-i2c.yaml

-- 
2.35.1

[PATCH v2 1/3] dt-bindings: trivial-devices: Remove Infineon SLB9673 TPM

[Joel Stanley]

This reverts commit 2353673d8a025a6ba3b3aa3917a3a98944e64702.

It will be added to its own bindings document.

Signed-off-by: Joel Stanley <joel@jms.id.au>
---
 Documentation/devicetree/bindings/trivial-devices.yaml | 2 --
 1 file changed, 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/trivial-devices.yaml b/Documentation/devicetree/bindings/trivial-devices.yaml
index 61746755c107..7c62c2740330 100644
--- a/Documentation/devicetree/bindings/trivial-devices.yaml
+++ b/Documentation/devicetree/bindings/trivial-devices.yaml
@@ -139,8 +139,6 @@ properties:
           - 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
-- 
2.35.1

[PATCH v2 2/3] dt-bindings: tpm: Add schema for TIS I2C devices

[Joel Stanley]

From: Johannes Holland <johannes.holland@infineon.com>

Add a dt schema to support device tree bindings for the generic I2C
physical layer. Refer to the TCG PC Client Platform TPM Profile (PTP)
Specification for TPM 2.0 v1.04 Revision 14.

This includes descriptions for the Nuvoton and Infineon devices.

Signed-off-by: Johannes Holland <johannes.holland@infineon.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>
---
v2: String changes
---
 .../bindings/security/tpm/tpm-tis-i2c.yaml    | 50 +++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/security/tpm/tpm-tis-i2c.yaml

diff --git a/Documentation/devicetree/bindings/security/tpm/tpm-tis-i2c.yaml b/Documentation/devicetree/bindings/security/tpm/tpm-tis-i2c.yaml
new file mode 100644
index 000000000000..de1e34065748
--- /dev/null
+++ b/Documentation/devicetree/bindings/security/tpm/tpm-tis-i2c.yaml
@@ -0,0 +1,50 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/security/tpm/tpm-tis-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: I2C PTP based TPM Devices
+
+maintainers:
+  - Johannes Holland <johannes.holland@infineon.com>
+
+description:
+  Device Tree Bindings for I2C based Trusted Platform Module (TPM).
+
+properties:
+  $nodename:
+    pattern: "^tpm(@[0-9a-f]+)?$"
+
+  compatible:
+    oneOf:
+      - description: Infineon's Trusted Platform Module (TPM) (SLB9673).
+        items:
+          - const: infineon,slb9673
+          - const: tcg,tpm-tis-i2c
+      - description: Nuvoton's Trusted Platform Module (TPM) (NPCT75x).
+        items:
+          - const: nuvoton,npct75x
+          - const: tcg,tpm-tis-i2c
+      - const: tcg,tpm-tis-i2c
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      tpm@2e {
+        compatible = "nuvoton,npct75x", "tcg,tpm-tis-i2c";
+        reg = <0x2e>;
+      };
+    };
+...
-- 
2.35.1

[PATCH v2 3/3] tpm: tis-i2c: Add more compatible strings

[Joel Stanley]

The NPCT75x TPM is TIS compatible. It has an I2C and SPI interface.

https://www.nuvoton.com/products/cloud-computing/security/trusted-platform-module-tpm/

Add a compatible string for it, and the generic compatible.

Signed-off-by: Joel Stanley <joel@jms.id.au>
---
 drivers/char/tpm/tpm_tis_i2c.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/char/tpm/tpm_tis_i2c.c b/drivers/char/tpm/tpm_tis_i2c.c
index 0692510dfcab..4af27b7ec5b1 100644
--- a/drivers/char/tpm/tpm_tis_i2c.c
+++ b/drivers/char/tpm/tpm_tis_i2c.c
@@ -368,6 +368,8 @@ MODULE_DEVICE_TABLE(i2c, tpm_tis_i2c_id);
 #ifdef CONFIG_OF
 static const struct of_device_id of_tis_i2c_match[] = {
 	{ .compatible = "infineon,slb9673", },
+	{ .compatible = "nuvoton,npct75x", },
+	{ .compatible = "tcg,tpm-tis-i2c", },
 	{}
 };
 MODULE_DEVICE_TABLE(of, of_tis_i2c_match);
-- 
2.35.1

Re: [PATCH v2 3/3] tpm: tis-i2c: Add more compatible strings

[Rob Herring]

On Wed, Sep 28, 2022 at 02:09:57PM +0930, Joel Stanley wrote:
> The NPCT75x TPM is TIS compatible. It has an I2C and SPI interface.
> 
> https://www.nuvoton.com/products/cloud-computing/security/trusted-platform-module-tpm/
> 
> Add a compatible string for it, and the generic compatible.
> 
> Signed-off-by: Joel Stanley <joel@jms.id.au>
> ---
>  drivers/char/tpm/tpm_tis_i2c.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/char/tpm/tpm_tis_i2c.c b/drivers/char/tpm/tpm_tis_i2c.c
> index 0692510dfcab..4af27b7ec5b1 100644
> --- a/drivers/char/tpm/tpm_tis_i2c.c
> +++ b/drivers/char/tpm/tpm_tis_i2c.c
> @@ -368,6 +368,8 @@ MODULE_DEVICE_TABLE(i2c, tpm_tis_i2c_id);
>  #ifdef CONFIG_OF
>  static const struct of_device_id of_tis_i2c_match[] = {
>  	{ .compatible = "infineon,slb9673", },
> +	{ .compatible = "nuvoton,npct75x", },
> +	{ .compatible = "tcg,tpm-tis-i2c", },

If there is not currently any distinction that the kernel makes, you 
only need to add "tcg,tpm-tis-i2c".

>  	{}
>  };
>  MODULE_DEVICE_TABLE(of, of_tis_i2c_match);
> -- 
> 2.35.1
> 
> 

Re: [PATCH v2 1/3] dt-bindings: trivial-devices: Remove Infineon SLB9673 TPM

[Rob Herring]

On Wed, 28 Sep 2022 14:09:55 +0930, Joel Stanley wrote:
> This reverts commit 2353673d8a025a6ba3b3aa3917a3a98944e64702.
> 
> It will be added to its own bindings document.
> 
> Signed-off-by: Joel Stanley <joel@jms.id.au>
> ---
>  Documentation/devicetree/bindings/trivial-devices.yaml | 2 --
>  1 file changed, 2 deletions(-)
> 

Reviewed-by: Rob Herring <robh@kernel.org>

Re: [PATCH v2 2/3] dt-bindings: tpm: Add schema for TIS I2C devices

[Rob Herring]

On Wed, 28 Sep 2022 14:09:56 +0930, Joel Stanley wrote:
> From: Johannes Holland <johannes.holland@infineon.com>
> 
> Add a dt schema to support device tree bindings for the generic I2C
> physical layer. Refer to the TCG PC Client Platform TPM Profile (PTP)
> Specification for TPM 2.0 v1.04 Revision 14.
> 
> This includes descriptions for the Nuvoton and Infineon devices.
> 
> Signed-off-by: Johannes Holland <johannes.holland@infineon.com>
> Signed-off-by: Joel Stanley <joel@jms.id.au>
> ---
> v2: String changes
> ---
>  .../bindings/security/tpm/tpm-tis-i2c.yaml    | 50 +++++++++++++++++++
>  1 file changed, 50 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/security/tpm/tpm-tis-i2c.yaml
> 

Reviewed-by: Rob Herring <robh@kernel.org>

Re: [PATCH v2 3/3] tpm: tis-i2c: Add more compatible strings

[Jarkko Sakkinen]

On Wed, Sep 28, 2022 at 02:09:57PM +0930, Joel Stanley wrote:
> The NPCT75x TPM is TIS compatible. It has an I2C and SPI interface.
> 
> https://www.nuvoton.com/products/cloud-computing/security/trusted-platform-module-tpm/
> 
> Add a compatible string for it, and the generic compatible.
> 
> Signed-off-by: Joel Stanley <joel@jms.id.au>
> ---
>  drivers/char/tpm/tpm_tis_i2c.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/char/tpm/tpm_tis_i2c.c b/drivers/char/tpm/tpm_tis_i2c.c
> index 0692510dfcab..4af27b7ec5b1 100644
> --- a/drivers/char/tpm/tpm_tis_i2c.c
> +++ b/drivers/char/tpm/tpm_tis_i2c.c
> @@ -368,6 +368,8 @@ MODULE_DEVICE_TABLE(i2c, tpm_tis_i2c_id);
>  #ifdef CONFIG_OF
>  static const struct of_device_id of_tis_i2c_match[] = {
>  	{ .compatible = "infineon,slb9673", },
> +	{ .compatible = "nuvoton,npct75x", },
> +	{ .compatible = "tcg,tpm-tis-i2c", },
>  	{}
>  };
>  MODULE_DEVICE_TABLE(of, of_tis_i2c_match);
> -- 
> 2.35.1
> 

Acked-by: Jarkko Sakkinen <jarkko@kernel.org>

IMHO could be picked to the same tree with DT changes instead
of my tree.

BR, Jarkko

Re: [PATCH v2 3/3] tpm: tis-i2c: Add more compatible strings

[Rob Herring]

On Fri, Sep 30, 2022 at 4:47 PM Jarkko Sakkinen <jarkko@kernel.org> wrote:
>
> On Wed, Sep 28, 2022 at 02:09:57PM +0930, Joel Stanley wrote:
> > The NPCT75x TPM is TIS compatible. It has an I2C and SPI interface.
> >
> > https://www.nuvoton.com/products/cloud-computing/security/trusted-platform-module-tpm/
> >
> > Add a compatible string for it, and the generic compatible.
> >
> > Signed-off-by: Joel Stanley <joel@jms.id.au>
> > ---
> >  drivers/char/tpm/tpm_tis_i2c.c | 2 ++
> >  1 file changed, 2 insertions(+)
> >
> > diff --git a/drivers/char/tpm/tpm_tis_i2c.c b/drivers/char/tpm/tpm_tis_i2c.c
> > index 0692510dfcab..4af27b7ec5b1 100644
> > --- a/drivers/char/tpm/tpm_tis_i2c.c
> > +++ b/drivers/char/tpm/tpm_tis_i2c.c
> > @@ -368,6 +368,8 @@ MODULE_DEVICE_TABLE(i2c, tpm_tis_i2c_id);
> >  #ifdef CONFIG_OF
> >  static const struct of_device_id of_tis_i2c_match[] = {
> >       { .compatible = "infineon,slb9673", },
> > +     { .compatible = "nuvoton,npct75x", },
> > +     { .compatible = "tcg,tpm-tis-i2c", },
> >       {}
> >  };
> >  MODULE_DEVICE_TABLE(of, of_tis_i2c_match);
> > --
> > 2.35.1
> >
>
> Acked-by: Jarkko Sakkinen <jarkko@kernel.org>
>
> IMHO could be picked to the same tree with DT changes instead
> of my tree.

It's supposed to be the other way around. DT bindings go with drivers
via subsystem tree. I don't take drivers.

But it seems this first needs some coordination with this[1] series.

Rob

[1] https://lore.kernel.org/all/20220930165116.13329-1-Alexander.Steffen@infineon.com/

Re: [PATCH v2 3/3] tpm: tis-i2c: Add more compatible strings

[Jarkko Sakkinen]

On Tue, Oct 04, 2022 at 04:20:56PM -0500, Rob Herring wrote:
> On Fri, Sep 30, 2022 at 4:47 PM Jarkko Sakkinen <jarkko@kernel.org> wrote:
> >
> > On Wed, Sep 28, 2022 at 02:09:57PM +0930, Joel Stanley wrote:
> > > The NPCT75x TPM is TIS compatible. It has an I2C and SPI interface.
> > >
> > > https://www.nuvoton.com/products/cloud-computing/security/trusted-platform-module-tpm/
> > >
> > > Add a compatible string for it, and the generic compatible.
> > >
> > > Signed-off-by: Joel Stanley <joel@jms.id.au>
> > > ---
> > >  drivers/char/tpm/tpm_tis_i2c.c | 2 ++
> > >  1 file changed, 2 insertions(+)
> > >
> > > diff --git a/drivers/char/tpm/tpm_tis_i2c.c b/drivers/char/tpm/tpm_tis_i2c.c
> > > index 0692510dfcab..4af27b7ec5b1 100644
> > > --- a/drivers/char/tpm/tpm_tis_i2c.c
> > > +++ b/drivers/char/tpm/tpm_tis_i2c.c
> > > @@ -368,6 +368,8 @@ MODULE_DEVICE_TABLE(i2c, tpm_tis_i2c_id);
> > >  #ifdef CONFIG_OF
> > >  static const struct of_device_id of_tis_i2c_match[] = {
> > >       { .compatible = "infineon,slb9673", },
> > > +     { .compatible = "nuvoton,npct75x", },
> > > +     { .compatible = "tcg,tpm-tis-i2c", },
> > >       {}
> > >  };
> > >  MODULE_DEVICE_TABLE(of, of_tis_i2c_match);
> > > --
> > > 2.35.1
> > >
> >
> > Acked-by: Jarkko Sakkinen <jarkko@kernel.org>
> >
> > IMHO could be picked to the same tree with DT changes instead
> > of my tree.
> 
> It's supposed to be the other way around. DT bindings go with drivers
> via subsystem tree. I don't take drivers.
> 
> But it seems this first needs some coordination with this[1] series.
> 
> Rob
> 
> [1] https://lore.kernel.org/all/20220930165116.13329-1-Alexander.Steffen@infineon.com/

WFM, I can pick it (once the issues are fixed).

BR, Jarkko

Re: [PATCH v2 3/3] tpm: tis-i2c: Add more compatible strings

[Joel Stanley]

On Fri, 30 Sept 2022 at 14:44, Rob Herring <robh@kernel.org> wrote:
>
> On Wed, Sep 28, 2022 at 02:09:57PM +0930, Joel Stanley wrote:
> > The NPCT75x TPM is TIS compatible. It has an I2C and SPI interface.
> >
> > https://www.nuvoton.com/products/cloud-computing/security/trusted-platform-module-tpm/
> >
> > Add a compatible string for it, and the generic compatible.
> >
> > Signed-off-by: Joel Stanley <joel@jms.id.au>
> > ---
> >  drivers/char/tpm/tpm_tis_i2c.c | 2 ++
> >  1 file changed, 2 insertions(+)
> >
> > diff --git a/drivers/char/tpm/tpm_tis_i2c.c b/drivers/char/tpm/tpm_tis_i2c.c
> > index 0692510dfcab..4af27b7ec5b1 100644
> > --- a/drivers/char/tpm/tpm_tis_i2c.c
> > +++ b/drivers/char/tpm/tpm_tis_i2c.c
> > @@ -368,6 +368,8 @@ MODULE_DEVICE_TABLE(i2c, tpm_tis_i2c_id);
> >  #ifdef CONFIG_OF
> >  static const struct of_device_id of_tis_i2c_match[] = {
> >       { .compatible = "infineon,slb9673", },
> > +     { .compatible = "nuvoton,npct75x", },
> > +     { .compatible = "tcg,tpm-tis-i2c", },
>
> If there is not currently any distinction that the kernel makes, you
> only need to add "tcg,tpm-tis-i2c".

There are device trees that just have one or the other, so it makes
sense to list both.

>
> >       {}
> >  };
> >  MODULE_DEVICE_TABLE(of, of_tis_i2c_match);
> > --
> > 2.35.1
> >
> >

Re: [PATCH v2 3/3] tpm: tis-i2c: Add more compatible strings

[Guenter Roeck]

On Wed, Sep 28, 2022 at 02:09:57PM +0930, Joel Stanley wrote:
> The NPCT75x TPM is TIS compatible. It has an I2C and SPI interface.
> 
> https://www.nuvoton.com/products/cloud-computing/security/trusted-platform-module-tpm/
> 
> Add a compatible string for it, and the generic compatible.
> 
> Signed-off-by: Joel Stanley <joel@jms.id.au>

Does anyone happen to know why this patch never made it upstream ?

Thanks,
Guenter

> ---
>  drivers/char/tpm/tpm_tis_i2c.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/char/tpm/tpm_tis_i2c.c b/drivers/char/tpm/tpm_tis_i2c.c
> index 0692510dfcab..4af27b7ec5b1 100644
> --- a/drivers/char/tpm/tpm_tis_i2c.c
> +++ b/drivers/char/tpm/tpm_tis_i2c.c
> @@ -368,6 +368,8 @@ MODULE_DEVICE_TABLE(i2c, tpm_tis_i2c_id);
>  #ifdef CONFIG_OF
>  static const struct of_device_id of_tis_i2c_match[] = {
>  	{ .compatible = "infineon,slb9673", },
> +	{ .compatible = "nuvoton,npct75x", },
> +	{ .compatible = "tcg,tpm-tis-i2c", },
>  	{}
>  };
>  MODULE_DEVICE_TABLE(of, of_tis_i2c_match);
> -- 
> 2.35.1
>