linux-kernel - [PATCH v4 10/15] arm64: dts: freescale: imx93-phyboard-segin: Add RTC support

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Message-Id: <20250422105644.2725168-11-primoz.fiser@norik.com>
Date: Tue, 22 Apr 2025 12:56:39 +0200
From: Primoz Fiser <primoz.fiser@...ik.com>
To: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>
Cc: devicetree@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	upstream@...ts.phytec.de
Subject: [PATCH v4 10/15] arm64: dts: freescale: imx93-phyboard-segin: Add RTC support

Add support for RTC connected via I2C on phyBOARD-Segin-i.MX93. Set
default RTC by configuring the aliases.

Signed-off-by: Primoz Fiser <primoz.fiser@...ik.com>
---
Changes in v4:
- no changes

 .../dts/freescale/imx93-phyboard-segin.dts    | 36 +++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx93-phyboard-segin.dts b/arch/arm64/boot/dts/freescale/imx93-phyboard-segin.dts
index 525f52789f8b..38b89398e646 100644
--- a/arch/arm64/boot/dts/freescale/imx93-phyboard-segin.dts
+++ b/arch/arm64/boot/dts/freescale/imx93-phyboard-segin.dts
@@ -17,6 +17,11 @@ /{
 	compatible = "phytec,imx93-phyboard-segin", "phytec,imx93-phycore-som",
 		     "fsl,imx93";
 
+	aliases {
+		rtc0 = &i2c_rtc;
+		rtc1 = &bbnsm_rtc;
+	};
+
 	chosen {
 		stdout-path = &lpuart1;
 	};
@@ -33,6 +38,24 @@ reg_usdhc2_vmmc: regulator-usdhc2 {
 	};
 };
 
+/* I2C2 */
+&lpi2c2 {
+	clock-frequency = <400000>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_lpi2c2>;
+	status = "okay";
+
+	/* RTC */
+	i2c_rtc: rtc@68 {
+		compatible = "microcrystal,rv4162";
+		reg = <0x68>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_rtc>;
+		interrupt-parent = <&gpio4>;
+		interrupts = <26 IRQ_TYPE_LEVEL_LOW>;
+	};
+};
+
 /* Console */
 &lpuart1 {
 	pinctrl-names = "default";
@@ -56,6 +79,13 @@ &usdhc2 {
 };
 
 &iomuxc {
+	pinctrl_lpi2c2: lpi2c2grp {
+		fsl,pins = <
+			MX93_PAD_I2C2_SCL__LPI2C2_SCL		0x40000b9e
+			MX93_PAD_I2C2_SDA__LPI2C2_SDA		0x40000b9e
+		>;
+	};
+
 	pinctrl_uart1: uart1grp {
 		fsl,pins = <
 			MX93_PAD_UART1_RXD__LPUART1_RX		0x31e
@@ -69,6 +99,12 @@ MX93_PAD_SD2_RESET_B__GPIO3_IO07	0x31e
 		>;
 	};
 
+	pinctrl_rtc: rtcgrp {
+		fsl,pins = <
+			MX93_PAD_ENET2_RD2__GPIO4_IO26		0x31e
+		>;
+	};
+
 	pinctrl_usdhc2_cd: usdhc2cdgrp {
 		fsl,pins = <
 			MX93_PAD_SD2_CD_B__GPIO3_IO00		0x31e
-- 
2.34.1