On Tue Jan 3, 2023 at 5:51 PM EET, Lukas Wunner wrote:
> Commit 4f2a348aa365 ("arm64: dts: imx8mm-venice-gw73xx: add TPM device")
> added a devicetree node for the Trusted Platform Module on certain
> Gateworks boards.
>
> The commit only used the generic "tcg,tpm_tis-spi" compatible string,
> but public documentation shows that the chip is an ATTPM20P from Atmel
> (nowadays Microchip):
> https://trac.gateworks.com/wiki/tpm
>
> Add the chip to the supported compatible strings of the TPM TIS SPI
> schema.
>
> For reference, a datasheet is available at:
> https://ww1.microchip.com/downloads/en/DeviceDoc/ATTPM20P-Trusted-Platform-Module-TPM-2.0-SPI-Interface-Summary-Data-Sheet-DS40002082A.pdf
>
> Signed-off-by: Lukas Wunner <lukas@xxxxxxxxx>
> Cc: Tim Harvey <tharvey@xxxxxxxxxxxxx>
> ---
> This patch depends on the following series to consolidate TCG TIS bindings:
> https://lore.kernel.org/all/cover.1702806810.git.lukas@xxxxxxxxx/
>
> Documentation/devicetree/bindings/tpm/tcg,tpm_tis-spi.yaml | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/Documentation/devicetree/bindings/tpm/tcg,tpm_tis-spi.yaml b/Documentation/devicetree/bindings/tpm/tcg,tpm_tis-spi.yaml
> index c3413b4..6cb2de7 100644
> --- a/Documentation/devicetree/bindings/tpm/tcg,tpm_tis-spi.yaml
> +++ b/Documentation/devicetree/bindings/tpm/tcg,tpm_tis-spi.yaml
> @@ -20,6 +20,7 @@ properties:
> compatible:
> items:
> - enum:
> + - atmel,attpm20p
> - infineon,slb9670
> - st,st33htpm-spi
> - st,st33zp24-spi
Acked-by: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
BR, Jarkko
