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Add custom overlay for SC16IS752 used in Industrial Shields RPI PLC #1194

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merged 1 commit into from
Dec 18, 2024
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Add custom overlay for SC16IS752 used in Industrial Shields RPI PLC #1194

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93 changes: 93 additions & 0 deletions ...ipes-kernel/linux/linux-raspberrypi/0001-overlays-Add-overlay-for-RPI-PLC-SC16IS752.patch
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Original file line number Diff line number Diff line change
@@ -0,0 +1,93 @@
commit e5cf36f74f68f53e2b2f89669c0fb029cd810bab
Author: RickyFA <[email protected]>
Date: Fri Nov 29 08:51:37 2024 +0100

[PATCH] overlays: Add custom overlay for SC16IS752 used in Industrial Shields RPI PLC

Signed-off-by: Ricard Franch <[email protected]>

diff --git a/arch/arm/boot/dts/overlays/sc16is752-spi1-rpiplc-v4-overlay.dts b/arch/arm/boot/dts/overlays/sc16is752-spi1-rpiplc-v4-overlay.dts
new file mode 100644
index 000000000..73be72925
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/sc16is752-spi1-rpiplc-v4-overlay.dts
@@ -0,0 +1,79 @@
+/dts-v1/;
+/plugin/;
+
+/ {
+ compatible = "brcm,bcm2835";
+
+ fragment@0 {
+ target = <&gpio>;
+ __overlay__ {
+ spi1_pins: spi1_pins {
+ brcm,pins = <19 20 21>;
+ brcm,function = <3>; /* alt4 */
+ };
+
+ spi1_cs_pins: spi1_cs_pins {
+ brcm,pins = <18 17>;
+ brcm,function = <1>; /* output */
+ };
+ };
+ };
+
+ fragment@1 {
+ target = <&spi1>;
+ __overlay__ {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&spi1_pins &spi1_cs_pins>;
+ cs-gpios = <&gpio 18 1>, <&gpio 17 1>;
+ status = "okay";
+
+ sc16is752_0: sc16is752@0 {
+ compatible = "nxp,sc16is752";
+ reg = <0>; /* CE0 */
+ clocks = <&sc16is752_clk>;
+ interrupt-parent = <&gpio>;
+ interrupts = <22 2>; /* IRQ_TYPE_EDGE_FALLING */
+ gpio-controller;
+ #gpio-cells = <2>;
+ spi-max-frequency = <4000000>;
+ };
+
+ sc16is752_1: sc16is752@1 {
+ compatible = "nxp,sc16is752";
+ reg = <1>; /* CE1 */
+ clocks = <&sc16is752_clk>;
+ interrupt-parent = <&gpio>;
+ interrupts = <16 2>; /* IRQ_TYPE_EDGE_FALLING */
+ gpio-controller;
+ #gpio-cells = <2>;
+ spi-max-frequency = <4000000>;
+ };
+ };
+ };
+
+ fragment@2 {
+ target = <&aux>;
+ __overlay__ {
+ status = "okay";
+ };
+ };
+
+ fragment@3 {
+ target-path = "/";
+ __overlay__ {
+ sc16is752_clk: sc16is752_spi1_0_clk {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <14745600>;
+ };
+ };
+ };
+
+ __overrides__ {
+ int_pin_0 = <&sc16is752_0>,"interrupts:0";
+ int_pin_1 = <&sc16is752_1>,"interrupts:0";
+ xtal = <&sc16is752_clk>,"clock-frequency:0";
+ };
+};
1 change: 1 addition & 0 deletions layers/meta-balena-raspberrypi/recipes-kernel/linux/linux-raspberrypi_5.15.bbappend
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Expand Up @@ -24,6 +24,7 @@ SRC_URI:append = " \
file://0011-USB-serial-Add-support-for-more-Quectel-modules.patch \
file://0001-waveshare-sim7600-Add-dtbo-for-this-modem.patch \
file://0001-overlays-Add-overlay-for-Seeed-reComputer-R1000.patch \
file://0001-overlays-Add-overlay-for-RPI-PLC-SC16IS752.patch \
"

SRC_URI:append:rt-rpi-300 = " \
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