linux-kernel - [PATCH 4/8] dts: ti: k3-am625-beagleplay: Enable mikroBUS connector

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Message-Id: <20240911-mikrobus-dt-v1-4-3ded4dc879e7@beagleboard.org>
Date: Wed, 11 Sep 2024 19:57:21 +0530
From: Ayush Singh <ayush@...gleboard.org>
To: fabien.parent@...aro.org, d-gole@...com, lorforlinux@...gleboard.org, 
 jkridner@...gleboard.org, robertcnelson@...gleboard.org, 
 Andrew Davis <afd@...com>, Miguel Ojeda <ojeda@...nel.org>, 
 Alex Gaynor <alex.gaynor@...il.com>, Boqun Feng <boqun.feng@...il.com>, 
 Gary Guo <gary@...yguo.net>, 
 Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
 Benno Lossin <benno.lossin@...ton.me>, 
 Andreas Hindborg <a.hindborg@...nel.org>, Alice Ryhl <aliceryhl@...gle.com>, 
 Trevor Gross <tmgross@...ch.edu>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Derek Kiernan <derek.kiernan@....com>, 
 Dragan Cvetic <dragan.cvetic@....com>, Arnd Bergmann <arnd@...db.de>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Nishanth Menon <nm@...com>, 
 Vignesh Raghavendra <vigneshr@...com>, Tero Kristo <kristo@...nel.org>
Cc: linux-kernel@...r.kernel.org, rust-for-linux@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 Ayush Singh <ayush@...gleboard.org>
Subject: [PATCH 4/8] dts: ti: k3-am625-beagleplay: Enable mikroBUS
 connector

Add mikroBUS connector support for Beagleplay. Acts as a nexus node for
gpios. Allows defining GPIOS relative to the connector. The pin
numbering is as follows:
  0: PWM
  1: INT
  2: RX
  3: TX
  4: SCL
  5: SDA
  6: MOSI
  7: MISO
  8: SCK
  9: CS
  10: RST
  11: AN

Signed-off-by: Ayush Singh <ayush@...gleboard.org>
---
 arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts | 53 +++++++++++++++++++++++---
 1 file changed, 47 insertions(+), 6 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts b/arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts
index 70de288d728e..628bcfcc4651 100644
--- a/arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts
+++ b/arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts
@@ -227,6 +227,21 @@ simple-audio-card,codec {
 		};
 	};
 
+	mikrobus_connector0: mikrobus-connector0 {
+		status = "disabled";
+		compatible = "mikrobus-connector";
+
+		#gpio-cells = <2>;
+		gpio-map =
+		<0 0 &main_gpio1 11 0>, <1 0 &main_gpio1 9 0>,
+		<2 0 &main_gpio1 24 0>, <3 0 &main_gpio1 25 0>,
+		<4 0 &main_gpio1 22 0>, <5 0 &main_gpio1 23 0>,
+		<6 0 &main_gpio1 7 0>, <7 0 &main_gpio1 8 0>,
+		<8 0 &main_gpio1 14 0>, <9 0 &main_gpio1 13 0>,
+		<10 0 &main_gpio1 12 0>, <11 0 &main_gpio1 10 0>;
+		gpio-map-mask = <0xf 0x0>;
+		gpio-map-pass-thru = <0x0 0x1>;
+	};
 };
 
 &main_pmx0 {
@@ -394,6 +409,25 @@ AM62X_IOPAD(0x01d4, PIN_INPUT_PULLUP, 2) /* (B15) UART0_RTSn.I2C3_SDA */
 		>;
 	};
 
+	mikrobus_i2c_pins_gpio: mikrobus-i2c-gpio-pins {
+		pinctrl-single,pins = <
+			AM62X_IOPAD(0x01d0, PIN_INPUT, 7) /* (A15) UART0_CTSn.GPIO1_22 */
+			AM62X_IOPAD(0x01d4, PIN_INPUT, 7) /* (B15) UART0_RTSn.GPIO1_23 */
+		>;
+	};
+
+	mikrobus_pwm_pins_default: mikrobus-pwm-default-pins {
+		pinctrl-single,pins = <
+			AM62X_IOPAD(0x01a4, PIN_INPUT, 2) /* (B20) MCASP0_ACLKX.ECAP2_IN_APWM_OUT */
+		>;
+	};
+
+	mikrobus_pwm_pins_gpio: mikrobus-pwm-gpio-pins {
+		pinctrl-single,pins = <
+			AM62X_IOPAD(0x01a4, PIN_INPUT, 7) /* (B20) MCASP0_ACLKX.GPIO1_11 */
+		>;
+	};
+
 	mikrobus_uart_pins_default: mikrobus-uart-default-pins {
 		pinctrl-single,pins = <
 			AM62X_IOPAD(0x01d8, PIN_INPUT, 1) /* (C15) MCAN0_TX.UART5_RXD */
@@ -401,6 +435,13 @@ AM62X_IOPAD(0x01dc, PIN_OUTPUT, 1) /* (E15) MCAN0_RX.UART5_TXD */
 		>;
 	};
 
+	mikrobus_uart_pins_gpio: mikrobus-uart-gpio-pins {
+		pinctrl-single,pins = <
+			AM62X_IOPAD(0x01d8, PIN_INPUT, 7) /* (C15) MCAN0_TX.GPIO1_24 */
+			AM62X_IOPAD(0x01dc, PIN_INPUT, 7) /* (E15) MCAN0_RX.GPIO1_25 */
+		>;
+	};
+
 	mikrobus_spi_pins_default: mikrobus-spi-default-pins {
 		pinctrl-single,pins = <
 			AM62X_IOPAD(0x01b0, PIN_INPUT, 1) /* (A20) MCASP0_ACLKR.SPI2_CLK */
@@ -804,10 +845,8 @@ it66121_out: endpoint {
 };
 
 &main_i2c3 {
-	pinctrl-names = "default";
-	pinctrl-0 = <&mikrobus_i2c_pins_default>;
 	clock-frequency = <400000>;
-	status = "okay";
+	status = "disabled";
 };
 
 &main_spi2 {
@@ -876,9 +915,7 @@ &main_uart1 {
 };
 
 &main_uart5 {
-	pinctrl-names = "default";
-	pinctrl-0 = <&mikrobus_uart_pins_default>;
-	status = "okay";
+	status = "disabled";
 };
 
 &main_uart6 {
@@ -925,3 +962,7 @@ &mcasp1 {
 	       0 0 0 0
 	>;
 };
+
+&ecap2 {
+	status = "okay";
+};

-- 
2.46.0