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Merge pull request #1194 from RickyFA/master
Add custom overlay for SC16IS752 used in Industrial Shields RPI PLC
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...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 |
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| @@ -0,0 +1,93 @@ | ||
| commit e5cf36f74f68f53e2b2f89669c0fb029cd810bab | ||
| Author: RickyFA <[email protected]> | ||
| Date: Fri Nov 29 08:51:37 2024 +0100 | ||
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| [PATCH] overlays: Add custom overlay for SC16IS752 used in Industrial Shields RPI PLC | ||
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| Signed-off-by: Ricard Franch <[email protected]> | ||
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| 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"; | ||
| + }; | ||
| +}; |
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