[PATCH v3 2/3] arm64: dts: imx8mm-var-dart: add TPM support

[Stefano Radaelli <stefano.radaelli21@gmail.com>]

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

Add support for the TPM available on the Variscite DART-MX8M-MINI SOM.

Co-developed-by: Nate Drude <nate.d@variscite.com>
Signed-off-by: Nate Drude <nate.d@variscite.com>
Signed-off-by: Stefano Radaelli <stefano.r@variscite.com>
---
v2->v3:
 - Fixed reset-gpio polarity

v1->v2:
 - Add tpm pinctrl
 - Add comment on tpm reset line

 .../boot/dts/freescale/imx8mm-var-dart.dtsi      | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-var-dart.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-var-dart.dtsi
index c7a9eb23e5e8..cb7998616a87 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-var-dart.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-var-dart.dtsi
@@ -138,6 +138,16 @@ &i2c1 {
 	sda-gpios = <&gpio5 15 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
 	status = "okay";
 
+	st33ktpm2xi2c_som: tpm@2e {
+		compatible = "st,st33ktpm2xi2c", "tcg,tpm-tis-i2c";
+		reg = <0x2e>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_tpm_reset>;
+		label = "tpm";
+		/* active-low TPM reset line. */
+		reset-gpios = <&gpio4 31 GPIO_ACTIVE_LOW>;
+	};
+
 	pmic@4b {
 		compatible = "rohm,bd71847";
 		reg = <0x4b>;
@@ -452,6 +462,12 @@ MX8MM_IOMUXC_SAI3_MCLK_SAI3_MCLK		0xd6
 		>;
 	};
 
+	pinctrl_tpm_reset: tpm-resetgrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SAI3_TXFS_GPIO4_IO31		0x19
+		>;
+	};
+
 	pinctrl_uart4: uart4grp {
 		fsl,pins = <
 			MX8MM_IOMUXC_ECSPI2_SCLK_UART4_DCE_RX		0x140
-- 
2.47.3