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overlays: add chipcap2 overlay

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Support for the Amphenol Chipcap 2 humidity and temperature sensor has
been added to the Linux kernel with v6.9.

This I2C device provides three interrupt sources and requires a
dedicated regulator to operate, which makes it a bit more complex than
the current devices supported by i2c-sensor. Therefore, a dedicated file
has been implemented.

Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
This commit is contained in:
Javier Carrasco
2024-04-01 23:43:32 +02:00
committed by Dom Cobley
parent 7dc3407819
commit 549316ebf3
3 changed files with 82 additions and 0 deletions
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1
arch/arm/boot/dts/overlays/Makefile
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@@ -38,6 +38,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
camera-mux-2port.dtbo \
camera-mux-4port.dtbo \
cap1106.dtbo \
chipcap2.dtbo \
chipdip-dac.dtbo \
cirrus-wm5102.dtbo \
cm-swap-i2c0.dtbo \

15
arch/arm/boot/dts/overlays/README
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@@ -951,6 +951,21 @@ Load: dtoverlay=cap1106,<param>=<val>
Params: int_pin GPIO pin for interrupt signal (default 23)
Name: chipcap2
Info: Enables the Chipcap 2 humidity and temperature sensor. This device
provides low and high humidity alarms and requires a 3V3 dedicated
regulator to operate.
Load: dtoverlay=chipcap2,<param>=<val>
Params: ready_pin GPIO pin for ready signal (default 4)
low_pin GPIO pin for low humidity signal (default 5)
high_pin GPIO pin for high humidity signal (default 6)
reg_pin GPIO pin to control the dedicated regulator
that powers the device (default 26)
Name: chipdip-dac
Info: Configures Chip Dip audio cards.
Load: dtoverlay=chipdip-dac

66
arch/arm/boot/dts/overlays/chipcap2-overlay.dts Normal file
View File

@@ -0,0 +1,66 @@
/dts-v1/;
/plugin/;
/* Overlay for ChipCap 2 on i2c */
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/interrupt-controller/irq.h>
/ {
compatible = "brcm,bcm2835";
fragment@0 {
target = <&i2c1>;
__overlay__ {
#address-cells = <1>;
#size-cells = <0>;
status = "okay";
chipcap2: chipcap2@28 {
compatible = "amphenol,cc2d23s";
reg = <0x28>;
interrupt-parent = <&gpio>;
interrupts = <4 IRQ_TYPE_EDGE_RISING>,
<5 IRQ_TYPE_EDGE_RISING>,
<6 IRQ_TYPE_EDGE_RISING>;
interrupt-names = "ready", "low", "high";
vdd-supply = <&chipcap2_reg>;
status = "okay";
};
};
};
fragment@1 {
target = <&gpio>;
__overlay__ {
chipcap2_pins: chipcap2_pins {
brcm,pins = <4 5 6 26>;
brcm,function = <0 0 0 1>;
};
};
};
fragment@2 {
target-path = "/";
__overlay__ {
chipcap2_reg: chipcap2_reg {
compatible = "regulator-fixed";
regulator-name = "chipcap2_reg";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
gpio = <&gpio 26 GPIO_ACTIVE_HIGH>;
enable-active-high;
};
};
};
__overrides__ {
ready_pin = <&chipcap2>, "interrupts:0",
<&chipcap2_pins>, "brcm,pins:0";
low_pin = <&chipcap2>, "interrupts:8",
<&chipcap2_pins>, "brcm,pins:4";
high_pin = <&chipcap2>, "interrupts:16",
<&chipcap2_pins>, "brcm,pins:8";
reg_pin = <&chipcap2_reg>, "gpio:4",
<&chipcap2_pins>, "brcm,pins:12";
};
};