dtoverlays: Add an overlay for the Infineon IRS1125

The Infineon IRS1125 is a CSI2 time of flight depth sensor
which has a suitable V4L2 subdevice driver.

Add an overlay for configuring it.

Signed-off-by: Markus Proeller <markus.proeller@pieye.org>

diff --git a/arch/arm/boot/dts/overlays/Makefile b/arch/arm/boot/dts/overlays/Makefile
index 9708804..e9cd972 100644 (file)
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -83,6 +83,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
        iqaudio-dac.dtbo \
        iqaudio-dacplus.dtbo \
        iqaudio-digi-wm8804-audio.dtbo \
+       irs1125.dtbo \
        jedec-spi-nor.dtbo \
        justboom-dac.dtbo \
        justboom-digi.dtbo \

diff --git a/arch/arm/boot/dts/overlays/README b/arch/arm/boot/dts/overlays/README
index c20d4f8..8ce8cf0 100644 (file)
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -1347,6 +1347,18 @@ Params: card_name               Override the default, "IQAudIODigi", card name.
                                 dai stream name.
 
 
+Name:   irs1125
+Info:   Infineon irs1125 TOF camera module.
+        Uses Unicam 1, which is the standard camera connector on most Pi
+        variants.
+Load:   dtoverlay=irs1125,<param>=<val>
+Params: i2c_pins_0_1            Use pins 0&1 for the I2C instead of 44&45.
+                                Useful on Compute Modules.
+
+        i2c_pins_28_29          Use pins 28&29 for the I2C instead of 44&45.
+                                This is required for Pi B+, 2, 0, and 0W.
+
+
 Name:   jedec-spi-nor
 Info:   Adds support for JEDEC-compliant SPI NOR flash devices.  (Note: The
         "jedec,spi-nor" kernel driver was formerly known as "m25p80".)

diff --git a/arch/arm/boot/dts/overlays/irs1125-overlay.dts b/arch/arm/boot/dts/overlays/irs1125-overlay.dts
new file mode 100644 (file)
index 0000000..b900671
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/irs1125-overlay.dts
@@ -0,0 +1,97 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Definitions for IRS1125 camera module on VC I2C bus
+/dts-v1/;
+/plugin/;
+
+/{
+       compatible = "brcm,bcm2835";
+
+       fragment@0 {
+               target = <&i2c_vc>;
+               __overlay__ {
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+                       status = "okay";
+
+                       irs1125: irs1125@3D {
+                               compatible = "infineon,irs1125";
+                               reg = <0x3D>;
+                               status = "okay";
+
+                               pwdn-gpios = <&gpio 5 0>;
+                               clocks = <&irs1125_clk>;
+
+                               irs1125_clk: camera-clk {
+                                       compatible = "fixed-clock";
+                                       #clock-cells = <0>;
+                                       clock-frequency = <26000000>;
+                               };
+
+                               port {
+                                       irs1125_0: endpoint {
+                                               remote-endpoint = <&csi1_ep>;
+                                               clock-lanes = <0>;
+                                               data-lanes = <1 2>;
+                                               clock-noncontinuous;
+                                               link-frequencies =
+                                                       /bits/ 64 <297000000>;
+                                       };
+                               };
+                       };
+               };
+       };
+
+       fragment@1 {
+               target = <&csi1>;
+               __overlay__ {
+                       status = "okay";
+
+                       port {
+                               csi1_ep: endpoint {
+                                       remote-endpoint = <&irs1125_0>;
+                               };
+                       };
+               };
+       };
+
+       fragment@2 {
+               target = <&i2c0_pins>;
+               __dormant__ {
+                       brcm,pins = <28 29>;
+                       brcm,function = <4>; /* alt0 */
+               };
+       };
+       fragment@3 {
+               target = <&i2c0_pins>;
+               __overlay__ {
+                       brcm,pins = <44 45>;
+                       brcm,function = <5>; /* alt1 */
+               };
+       };
+       fragment@4 {
+               target = <&i2c0_pins>;
+               __dormant__ {
+                       brcm,pins = <0 1>;
+                       brcm,function = <4>; /* alt0 */
+               };
+       };
+       fragment@5 {
+               target = <&i2c_vc>;
+               __overlay__ {
+                       status = "okay";
+               };
+       };
+
+       fragment@6 {
+               target-path="/__overrides__";
+               __overlay__ {
+                       cam0-pwdn-ctrl = <&irs1125>,"pwdn-gpios:0";
+                       cam0-pwdn      = <&irs1125>,"pwdn-gpios:4";
+               };
+       };
+
+       __overrides__ {
+               i2c_pins_0_1 = <0>,"-2-3+4";
+               i2c_pins_28_29 = <0>,"+2-3-4";
+       };
+};