[PATCH v3 1/5] arm64: dts: imx93-var-som-symphony: add TPM support

[Stefano Radaelli]

From: Stefano Radaelli <stefano.r at variscite.com>

Add the ST33KTPM2XI2C TPM device on the Symphony carrier board.

The TPM reset line is driven through a PCAL6408 GPIO expander, so add
the expander on the I2C bus and describe the TPM reset GPIO.

Signed-off-by: Stefano Radaelli <stefano.r at variscite.com>
---
v2->v3:
 - Use reset-gpios for the TPM instead of a GPIO hog

v1->v2:
 - Rename pca6408 label to pcal6408 to match the compatible
 - Clarify that the TPM enable line is a board-level GPIO hog

 .../boot/dts/freescale/imx93-var-som-symphony.dts | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx93-var-som-symphony.dts b/arch/arm64/boot/dts/freescale/imx93-var-som-symphony.dts
index c0842fb3cfa3..c736127c7115 100644
--- a/arch/arm64/boot/dts/freescale/imx93-var-som-symphony.dts
+++ b/arch/arm64/boot/dts/freescale/imx93-var-som-symphony.dts
@@ -208,6 +208,21 @@ &lpi2c1 {
 	sda-gpios = <&gpio1 1 GPIO_ACTIVE_HIGH>;
 	status = "okay";
 
+	pcal6408: gpio at 21 {
+		compatible = "nxp,pcal6408";
+		reg = <0x21>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		status = "okay";
+	};
+
+	st33ktpm2xi2c: tpm at 2e {
+		compatible = "st,st33ktpm2xi2c", "tcg,tpm-tis-i2c";
+		reg = <0x2e>;
+		label = "tpm";
+		reset-gpios = <&pcal6408 4 GPIO_ACTIVE_LOW>;
+	};
+
 	/* Capacitive touch controller */
 	ft5x06_ts: touchscreen at 38 {
 		compatible = "edt,edt-ft5206";
-- 
2.47.3