ACK: [PATCH 1/1] Add overlay for SLB9760 Iridium /LetsTrust TPM

[Kleber Souza]

On 4/1/19 1:33 AM, Alex Murray wrote:
> From: Peter Huewe <peterhuewe at gmx.de>
> 
> BugLink: https://bugs.launchpad.net/bugs/1822036
> 
> Device Tree overlay for the Infineon SLB9670 Trusted Platform Module add-on
> boards, which can be used as a secure key storage and hwrng.
> available as "Iridium SLB9670" by Infineon and "LetsTrust TPM" by
> pi3g.
> 
> Signed-off-by: Peter Huewe <peterhuewe at gmx.de>
> (cherry picked from commit c28ac2dc08bd73963f953a757a3362c64b5524ed
> https://github.com/raspberrypi/linux rpi-4.14.y)
> Signed-off-by: Alex Murray <alex.murray at canonical.com>

Acked-by: Kleber Sacilotto de Souza <kleber.souza at canonical.com>

> ---
>  arch/arm/boot/dts/overlays/Makefile           |  1 +
>  arch/arm/boot/dts/overlays/README             |  8 ++++
>  .../boot/dts/overlays/tpm-slb9670-overlay.dts | 44 +++++++++++++++++++
>  3 files changed, 53 insertions(+)
>  create mode 100644 arch/arm/boot/dts/overlays/tpm-slb9670-overlay.dts
> 
> diff --git a/arch/arm/boot/dts/overlays/Makefile b/arch/arm/boot/dts/overlays/Makefile
> index 5439afd9b28c..ea7b14b8a10d 100644
> --- a/arch/arm/boot/dts/overlays/Makefile
> +++ b/arch/arm/boot/dts/overlays/Makefile
> @@ -123,6 +123,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
>  	superaudioboard.dtbo \
>  	sx150x.dtbo \
>  	tinylcd35.dtbo \
> +	tpm-slb9670.dtbo \
>  	uart0.dtbo \
>  	uart1.dtbo \
>  	upstream.dtbo \
> diff --git a/arch/arm/boot/dts/overlays/README b/arch/arm/boot/dts/overlays/README
> index 7ec84713cd06..96022feff661 100644
> --- a/arch/arm/boot/dts/overlays/README
> +++ b/arch/arm/boot/dts/overlays/README
> @@ -1762,6 +1762,14 @@ Params: speed                   Display SPI bus speed
>                  dtoverlay=tinylcd35,touch,touchgpio=3
>  
>  
> +Name:   tpm-slb9670
> +Info:   Enables support for Infineon SLB9670 Trusted Platform Module add-on
> +        boards, which can be used as a secure key storage and hwrng,
> +        available as "Iridium SLB9670" by Infineon and "LetsTrust TPM" by pi3g.
> +Load:   dtoverlay=tpm-slb9670
> +Params: <None>
> +
> +
>  Name:   uart0
>  Info:   Change the pin usage of uart0
>  Load:   dtoverlay=uart0,<param>=<val>
> diff --git a/arch/arm/boot/dts/overlays/tpm-slb9670-overlay.dts b/arch/arm/boot/dts/overlays/tpm-slb9670-overlay.dts
> new file mode 100644
> index 000000000000..eac4511050de
> --- /dev/null
> +++ b/arch/arm/boot/dts/overlays/tpm-slb9670-overlay.dts
> @@ -0,0 +1,44 @@
> +/*
> + * Device Tree overlay for the Infineon SLB9670 Trusted Platform Module add-on
> + * boards, which can be used as a secure key storage and hwrng.
> + * available as "Iridium SLB9670" by Infineon and "LetsTrust TPM" by pi3g.
> + */
> +
> +/dts-v1/;
> +/plugin/;
> +
> +/ {
> +	compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
> +
> +	fragment at 0 {
> +		target = <&spi0>;
> +		__overlay__ {
> +			status = "okay";
> +		};
> +	};
> +
> +	fragment at 1 {
> +		target = <&spidev1>;
> +		__overlay__ {
> +			status = "disabled";
> +		};
> +	};
> +
> +	fragment at 2 {
> +		target = <&spi0>;
> +		__overlay__ {
> +			/* needed to avoid dtc warning */
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			slb9670: slb9670 at 1 {
> +				compatible = "infineon,slb9670";
> +				reg = <1>;	/* CE1 */
> +				#address-cells = <1>;
> +				#size-cells = <0>;
> +				spi-max-frequency = <32000000>;
> +				status = "okay";
> +			};
> +
> +		};
> +	};
> +};
>