linux-kernel - [PATCH v2 09/16] arm64: dts: mediatek: asurada: Add Cr50 TPM

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Date:   Thu,  5 May 2022 15:45:43 -0400
From:   Nícolas F. R. A. Prado 
        <nfraprado@...labora.com>
To:     Matthias Brugger <matthias.bgg@...il.com>
Cc:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>, kernel@...labora.com,
        Chen-Yu Tsai <wenst@...omium.org>,
        Nícolas F. R. A. Prado 
        <nfraprado@...labora.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mediatek@...ts.infradead.org
Subject: [PATCH v2 09/16] arm64: dts: mediatek: asurada: Add Cr50 TPM

The Asurada platform has a Google Security Chip connected to the SPI5
bus. It runs the cr50 firmware and provides TPM functionality. Add
support for it.

Signed-off-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---

(no changes since v1)

 .../arm64/boot/dts/mediatek/mt8192-asurada.dtsi | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
index a1cbf7a375b6..5221f1d1b7dc 100644
--- a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
@@ -5,6 +5,7 @@
  */
 /dts-v1/;
 #include "mt8192.dtsi"
+#include <dt-bindings/gpio/gpio.h>
 
 / {
 	aliases {
@@ -353,6 +354,13 @@ &pio {
 			  "AUD_DAT_MISO0",
 			  "AUD_DAT_MISO1";
 
+	cr50_int: cr50-irq-default-pins {
+		pins-gsc-ap-int-odl {
+			pinmux = <PINMUX_GPIO171__FUNC_GPIO171>;
+			input-enable;
+		};
+	};
+
 	cros_ec_int: cros-ec-irq-default-pins {
 		pins-ec-ap-int-odl {
 			pinmux = <PINMUX_GPIO5__FUNC_GPIO5>;
@@ -517,6 +525,15 @@ &spi5 {
 	mediatek,pad-select = <0>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&spi5_pins>;
+
+	cr50@0 {
+		compatible = "google,cr50";
+		reg = <0>;
+		interrupts-extended = <&pio 171 IRQ_TYPE_EDGE_RISING>;
+		spi-max-frequency = <1000000>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&cr50_int>;
+	};
 };
 
 &uart0 {
-- 
2.36.0