Requesting guidance for beaglebone black

Embedded Linux Discussions
2

Using TI’s pinmux tool with the AM335x and ZCZ package we can configure E17/E18 as:

		pinctrl-single,pins = <
			AM33XX_IOPAD(0x96c, PIN_INPUT_PULLUP | MUX_MODE3) /* (E17) uart0_rtsn.I2C1_SCL */
			AM33XX_IOPAD(0x968, PIN_INPUT_PULLUP | MUX_MODE3) /* (E18) uart0_ctsn.I2C1_SDA */
		>;

Clone repo:

git clone -b ti-linux-4.14.y https://github.com/RobertCNelson/ti-linux-kernel-dev.git
cd ./ti-linux-kernel-dev/
./build_kernel.sh

Hit ESC, ESC, and Ctrl-C after menuconfig loads, then patch this file, under the KERNEL directory

diff --git a/arch/arm/boot/dts/am335x-bone-common.dtsi b/arch/arm/boot/dts/am335x-bone-common.dtsi
index 6e5b6ae03b59..ee4ba20d08a2 100644
--- a/arch/arm/boot/dts/am335x-bone-common.dtsi
+++ b/arch/arm/boot/dts/am335x-bone-common.dtsi
@@ -79,6 +79,13 @@
                >;
        };
 
+       i2c1_pins: pinmux_i2c1_pins {
+               pinctrl-single,pins = <
+                       AM33XX_IOPAD(0x96c, PIN_INPUT_PULLUP | MUX_MODE3) /* (E17) uart0_rtsn.I2C1_SCL */
+                       AM33XX_IOPAD(0x968, PIN_INPUT_PULLUP | MUX_MODE3) /* (E18) uart0_ctsn.I2C1_SDA */
+               >;
+       };
+
 //     i2c2_pins: pinmux_i2c2_pins {
 //             pinctrl-single,pins = <
 //                     AM33XX_PADCONF(AM335X_PIN_UART1_CTSN, PIN_INPUT_PULLUP, MUX_MODE3)      /* uart1_ctsn.i2c2_sda */
@@ -283,6 +290,14 @@
        };
 };
 
+&i2c1 {
+       pinctrl-names = "default";
+       pinctrl-0 = <&i2c1_pins>;
+
+       status = "okay";
+       clock-frequency = <100000>;
+};
+
 &i2c2 {
        pinctrl-names = "default";
        //pinctrl-0 = <&i2c2_pins>;

Then finish the build:

./tools/rebuild.sh

Regards,

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