Differences

This shows you the differences between two versions of the page.

--- proper_device_tree_design [2018/11/18 10:29] – [One board, one .dts file] rpjday
+++ proper_device_tree_design [2018/11/18 10:46] (current) – [imx6ul-tx6ul-mainboard.dts] rpjday
@@ Line 51: / Line 51: @@
 Examples can be seen [[https://elinux.org/Device_Tree_Source_Undocumented|here]].
+===== Examples of /delete-node/ =====
+==== imx6dl-tx6s-8034.dts ====
+<file>
+#include "imx6dl.dtsi"
+#include "imx6qdl-tx6.dtsi"
+/ {
+        model = "Ka-Ro electronics TX6S-8034 Module";
+        compatible = "karo,imx6dl-tx6dl", "fsl,imx6dl";
+        aliases {
+                display = &display;
+                ipu1 = &ipu1;
+        };
+        cpus {
+                /delete-node/ cpu@1;
+        };
+</file>
+==== imx6q-utilite-pro.dts ====
+<file>
+#include <dt-bindings/input/input.h>
+#include "imx6q-cm-fx6.dts"
+/ {
+        model = "CompuLab Utilite Pro";
+        compatible = "compulab,utilite-pro", "compulab,cm-fx6", "fsl,imx6q";
+ ...
+};
+/*
+ * A single IPU is not able to drive both display interfaces available on the
+ * Utilite Pro at high resolution due to its bandwidth limitation. Since the
+ * tfp410 encoder is wired up to IPU1, sever the link between IPU1 and the
+ * SoC-internal Designware HDMI encoder forcing the latter to be connected to
+ * IPU2 instead of IPU1.
+ */
+/delete-node/&ipu1_di0_hdmi;
+/delete-node/&hdmi_mux_0;
+/delete-node/&ipu1_di1_hdmi;
+/delete-node/&hdmi_mux_1;
+</file>
+===== Examples of /delete-property/ =====
+==== imx6qp.dtsi ====
+<file>
+#include "imx6q.dtsi"
+/ {
+        soc {
+        ...
+};
+&fec {
+        /delete-property/interrupts-extended;
+        interrupts = <0 118 IRQ_TYPE_LEVEL_HIGH>,
+                     <0 119 IRQ_TYPE_LEVEL_HIGH>;
+};
+</file>
+==== imx6ul-tx6ul-mainboard.dts ====
+<file>
+#include "imx6ul.dtsi"
+#include "imx6ul-tx6ul.dtsi"
+/ {
+        model = "Ka-Ro electronics TXUL-0010 Module on TXUL Mainboard";
+        compatible = "karo,imx6ul-tx6ul", "fsl,imx6ul";
+        aliases {
+                lcdif_24bit_pins_a = &pinctrl_disp0_3;
+                mmc0 = &usdhc1;
+                /delete-property/ mmc1;
+                serial2 = &uart3;
+                serial4 = &uart5;
+        };
+        /delete-node/ sound;
+};
+...
+&usdhc1 {
+        pinctrl-0 = <&pinctrl_usdhc1>;
+        non-removable;
+        /delete-property/ cd-gpios;
+        cap-sdio-irq;
+};
+&uart1 {
+        pinctrl-0 = <&pinctrl_uart1>;
+        /delete-property/ uart-has-rtscts;
+};
+&uart2 {
+        pinctrl-0 = <&pinctrl_uart2>;
+        /delete-property/ uart-has-rtscts;
+        status = "okay";
+};
+</file>
+==== imx6ulz.dtsi ====
+<code>
+#include "imx6ull.dtsi"
+/ {
+        aliases {
+                /delete-property/ ethernet0;
+                /delete-property/ ethernet1;
+                /delete-property/ i2c2;
+                /delete-property/ i2c3;
+                /delete-property/ serial4;
+                /delete-property/ serial5;
+                /delete-property/ serial6;
+                /delete-property/ serial7;
+                /delete-property/ spi2;
+                /delete-property/ spi3;
+        };
+};
+/delete-node/ &adc1;
+/delete-node/ &can1;
+/delete-node/ &can2;
+/delete-node/ &ecspi3;
+/delete-node/ &ecspi4;
+/delete-node/ &epit2;
+/delete-node/ &gpt2;
+/delete-node/ &i2c3;
+/delete-node/ &i2c4;
+/delete-node/ &pwm5;
+/delete-node/ &pwm6;
+/delete-node/ &pwm7;
+/delete-node/ &pwm8;
+/delete-node/ &uart5;
+/delete-node/ &uart6;
+/delete-node/ &uart7;
+/delete-node/ &uart8;
+</code>