linux-kernel - [PATCH] arm64: dts: ti: k3-am625-beagleplay: Enable MikroBUS PWM

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Message-Id: <20240913-beagleplay-pwm-v1-1-d38ee5b36d8c@beagleboard.org>
Date: Fri, 13 Sep 2024 15:36:06 +0530
From: Ayush Singh <ayush@...gleboard.org>
To: d-gole@...com, lorforlinux@...gleboard.org, jkridner@...gleboard.org, 
 robertcnelson@...gleboard.org, Nishanth Menon <nm@...com>, 
 Vignesh Raghavendra <vigneshr@...com>, Tero Kristo <kristo@...nel.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Ayush Singh <ayush@...gleboard.org>
Subject: [PATCH] arm64: dts: ti: k3-am625-beagleplay: Enable MikroBUS PWM

Add pinmux for PWM functionality of MikroBUS PWM pin and enable the pwm
controller.

Signed-off-by: Ayush Singh <ayush@...gleboard.org>
---
Add pinmux for MikroBUS port PWM pin. Also enable the pwm controller.

Tested with the sysfs interface [0].

[0]: https://docs.kernel.org/driver-api/pwm.html#using-pwms-with-the-sysfs-interface
---
 arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts b/arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts
index 70de288d728e..2dbb8930be3f 100644
--- a/arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts
+++ b/arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts
@@ -419,6 +419,12 @@ AM62X_IOPAD(0x01a8, PIN_INPUT, 7) /* (D20) MCASP0_AFSX.GPIO1_12 */
 		>;
 	};
 
+	mikrobus_pwm_pins_default: mikrobus-pwm-default-pins {
+		pinctrl-single,pins = <
+			AM62X_IOPAD(0x01a4, PIN_INPUT, 2) /* (B20) MCASP0_ACLKX.ECAP2_IN_APWM_OUT */
+		>;
+	};
+
 	main_uart0_pins_default: main-uart0-default-pins {
 		bootph-all;
 		pinctrl-single,pins = <
@@ -925,3 +931,9 @@ &mcasp1 {
 	       0 0 0 0
 	>;
 };
+
+&ecap2 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&mikrobus_pwm_pins_default>;
+};

---
base-commit: 57f962b956f1d116cd64d5c406776c4975de549d
change-id: 20240913-beagleplay-pwm-b859db19318d

Best regards,
-- 
Ayush Singh <ayush@...gleboard.org>