linux-kernel - [PATCH] arm64: dts: ti: k3-am642-phyboard-electra: Add TPM support

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Date: Tue, 23 Jan 2024 11:29:21 +0100
From: Wadim Egorov <w.egorov@...tec.de>
To: <nm@...com>, <vigneshr@...com>, <kristo@...nel.org>, <robh+dt@...nel.org>,
	<krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>
CC: <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <upstream@...ts.phytec.de>
Subject: [PATCH] arm64: dts: ti: k3-am642-phyboard-electra: Add TPM support

The phyBOARD-Electra populates a TPM module on SPI0 bus.
Add support for the Infineon SLB9670 TPM module.

Signed-off-by: Wadim Egorov <w.egorov@...tec.de>
---
 .../dts/ti/k3-am642-phyboard-electra-rdk.dts  | 23 +++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am642-phyboard-electra-rdk.dts b/arch/arm64/boot/dts/ti/k3-am642-phyboard-electra-rdk.dts
index 53b64e55413f..8a518a86abc2 100644
--- a/arch/arm64/boot/dts/ti/k3-am642-phyboard-electra-rdk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-phyboard-electra-rdk.dts
@@ -159,6 +159,15 @@ AM64X_IOPAD(0x0298, PIN_INPUT_PULLUP, 0)	/* (D19) MMC1_SDCD */
 		>;
 	};
 
+	main_spi0_pins_default: main-spi0-default-pins {
+		pinctrl-single,pins = <
+			AM64X_IOPAD(0x020c, PIN_OUTPUT, 7)	/* (C13) SPI0_CS1.GPIO1_43 */
+			AM64X_IOPAD(0x0210, PIN_INPUT, 0)	/* (D13) SPI0_CLK */
+			AM64X_IOPAD(0x0214, PIN_OUTPUT, 0)	/* (A13) SPI0_D0 */
+			AM64X_IOPAD(0x0218, PIN_INPUT, 0)	/* (A14) SPI0_D1 */
+		>;
+	};
+
 	main_uart0_pins_default: main-uart0-default-pins {
 		pinctrl-single,pins = <
 			AM64X_IOPAD(0x0230, PIN_INPUT, 0)	/* (D15) UART0_RXD */
@@ -248,6 +257,20 @@ &main_mcan1 {
 	phys = <&can_tc2>;
 };
 
+&main_spi0 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_spi0_pins_default>;
+	cs-gpios = <0>, <&main_gpio1 43 GPIO_ACTIVE_LOW>;
+	ti,pindir-d0-out-d1-in;
+
+	tpm@1 {
+		compatible = "infineon,slb9670", "tcg,tpm_tis-spi";
+		reg = <1>;
+		spi-max-frequency = <10000000>;
+	};
+};
+
 &main_uart0 {
 	status = "okay";
 	pinctrl-names = "default";
-- 
2.25.1