linux-kernel - [PATCH v4 7/8] arm64: dts: ti: k3-am64x-sk: Enable eQEP

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Message-ID: <20240610144637.477954-8-jm@ti.com>
Date: Mon, 10 Jun 2024 09:46:36 -0500
From: Judith Mendez <jm@...com>
To: Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        William Breathitt Gray <wbg@...nel.org>, Nishanth Menon <nm@...com>
CC: <linux-iio@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Vignesh Raghavendra <vigneshr@...com>,
        Tero
 Kristo <kristo@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        David
 Lechner <david@...hnology.com>
Subject: [PATCH v4 7/8] arm64: dts: ti: k3-am64x-sk: Enable eQEP

There are 3 instances of eQEP on AM64x. Only EQEP0 signals
can be routed to the user expansion so enable only EQEP0
in k3-am642-sk.dts.

Signed-off-by: Judith Mendez <jm@...com>
---
Changes since v3:
- Fix pinmux label name
- Fix eQEP node comment
---
 arch/arm64/boot/dts/ti/k3-am642-sk.dts | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am642-sk.dts b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
index 5b028b3a3192f..1992444953745 100644
--- a/arch/arm64/boot/dts/ti/k3-am642-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
@@ -357,6 +357,16 @@ main_ecap0_pins_default: main-ecap0-default-pins {
 			AM64X_IOPAD(0x0270, PIN_INPUT, 0) /* (D18) ECAP0_IN_APWM_OUT */
 		>;
 	};
+
+	main_eqep0_pins_default: main-eqep0-default-pins {
+		pinctrl-single,pins = <
+			AM64X_IOPAD(0x00a0, PIN_INPUT, 3) /* (N16) GPMC0_WPn.EQEP0_A */
+			AM64X_IOPAD(0x00a4, PIN_INPUT, 3) /* (N17) GPMC0_DIR.EQEP0_B */
+			AM64X_IOPAD(0x00ac, PIN_INPUT, 3) /* (R20) GPMC0_CSn1.EQEP0_I */
+			AM64X_IOPAD(0x00a8, PIN_INPUT, 3) /* (R19) GPMC0_CSn0.EQEP0_S */
+		>;
+	};
+
 	main_wlan_en_pins_default: main-wlan-en-default-pins {
 		pinctrl-single,pins = <
 			AM64X_IOPAD(0x00c4, PIN_OUTPUT_PULLUP, 7) /* (V8) GPIO0_48 */
@@ -672,3 +682,10 @@ &ecap0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&main_ecap0_pins_default>;
 };
+
+&eqep0 {
+	status = "okay";
+	/* EQEP0 A & B available on pins 18 & 22 of J4 header */
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_eqep0_pins_default>;
+};
-- 
2.45.1