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From 82298c670f768f392f48526fe7c8a93682e83998 Mon Sep 17 00:00:00 2001
From: Peter Huewe <peterhuewe@gmx.de>
Date: Thu, 14 Jun 2018 22:51:24 +0200
Subject: [PATCH] Add overlay for SLB9760 Iridium /LetsTrust TPM
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@gmx.de>
---
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
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -137,6 +137,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
tc358743.dtbo \
tc358743-audio.dtbo \
tinylcd35.dtbo \
+ tpm-slb9670.dtbo \
uart0.dtbo \
uart1.dtbo \
upstream.dtbo \
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -2012,6 +2012,14 @@ Params: speed Display
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>
--- /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@0 {
+ target = <&spi0>;
+ __overlay__ {
+ status = "okay";
+ };
+ };
+
+ fragment@1 {
+ target = <&spidev1>;
+ __overlay__ {
+ status = "disabled";
+ };
+ };
+
+ fragment@2 {
+ target = <&spi0>;
+ __overlay__ {
+ /* needed to avoid dtc warning */
+ #address-cells = <1>;
+ #size-cells = <0>;
+ slb9670: slb9670@1 {
+ compatible = "infineon,slb9670";
+ reg = <1>; /* CE1 */
+ #address-cells = <1>;
+ #size-cells = <0>;
+ spi-max-frequency = <32000000>;
+ status = "okay";
+ };
+
+ };
+ };
+};
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