linux-kernel - [PATCH RESEND] arm64: dts: qcom: apq8016-sbc-d3-camera: Convert to DT overlay

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Message-Id: <20250408-apq8016-sbc-camera-dtso-v1-1-cdf1cd41bda6@linaro.org>
Date: Tue, 08 Apr 2025 13:38:42 +0200
From: Stephan Gerhold <stephan.gerhold@...aro.org>
To: Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konradybcio@...nel.org>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, linux-arm-msm@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Stephan Gerhold <stephan@...hold.net>, 
 Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Subject: [PATCH RESEND] arm64: dts: qcom: apq8016-sbc-d3-camera: Convert to
 DT overlay

From: Stephan Gerhold <stephan@...hold.net>

Follow the example of the recently added apq8016-sbc-usb-host.dtso and
convert apq8016-sbc-d3-camera-mezzanine.dts to a DT overlay that can be
applied on top of the apq8016-sbc.dtb. This makes it more clear that
this is not a special type of DB410c but just an addon board that can
be added on top.

Functionally there should not be any difference since
apq8016-sbc-d3-camera-mezzanine.dtb is still generated as before
(but now by applying the overlay on top of apq8016-sbc.dtb).

Since dtc does not know that there are default #address/size-cells in
msm8916.dtsi, repeat those in the overlay to avoid dtc warnings because
it expects the wrong amount of address/size-cells.

It would be nice to have a generic overlay for the D3 camera mezzanine
(that can be applied to all 96Boards) but that's much more complicated
than providing a board-specific DT overlay as intermediate step.

Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Signed-off-by: Stephan Gerhold <stephan@...hold.net>
---
This patch was already applied by Bjorn on Sun, 28 Jan 2024 11:45:55 -0600
as commit ea689ec32bf0d885277d3f58450a85df5149c98b [1]. However, unlike the
first patch in the series, this one never made it into the repository for
some reason.

[1]: https://lore.kernel.org/linux-arm-msm/170646395036.64610.14333204830178417809.b4-ty@kernel.org/
---
 arch/arm64/boot/dts/qcom/Makefile                            |  5 +++--
 ...ra-mezzanine.dts => apq8016-sbc-d3-camera-mezzanine.dtso} | 12 ++++++++++--
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
index adb4d026bcc4b24d73de92e204db8d525b0770e6..465b3791f15e66883717ecd59a2ade9461472df7 100644
--- a/arch/arm64/boot/dts/qcom/Makefile
+++ b/arch/arm64/boot/dts/qcom/Makefile
@@ -1,12 +1,13 @@
 # SPDX-License-Identifier: GPL-2.0
 dtb-$(CONFIG_ARCH_QCOM)	+= apq8016-sbc.dtb
 
-apq8016-sbc-usb-host-dtbs	:= apq8016-sbc.dtb apq8016-sbc-usb-host.dtbo
+apq8016-sbc-d3-camera-mezzanine-dtbs	:= apq8016-sbc.dtb apq8016-sbc-d3-camera-mezzanine.dtbo
+apq8016-sbc-usb-host-dtbs		:= apq8016-sbc.dtb apq8016-sbc-usb-host.dtbo
 
 dtb-$(CONFIG_ARCH_QCOM) += sar2130p-qar2130p.dtb
 
-dtb-$(CONFIG_ARCH_QCOM)	+= apq8016-sbc-usb-host.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= apq8016-sbc-d3-camera-mezzanine.dtb
+dtb-$(CONFIG_ARCH_QCOM)	+= apq8016-sbc-usb-host.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= apq8016-schneider-hmibsc.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= apq8039-t2.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= apq8094-sony-xperia-kitakami-karin_windy.dtb
diff --git a/arch/arm64/boot/dts/qcom/apq8016-sbc-d3-camera-mezzanine.dts b/arch/arm64/boot/dts/qcom/apq8016-sbc-d3-camera-mezzanine.dtso
similarity index 89%
rename from arch/arm64/boot/dts/qcom/apq8016-sbc-d3-camera-mezzanine.dts
rename to arch/arm64/boot/dts/qcom/apq8016-sbc-d3-camera-mezzanine.dtso
index f9cbf8c1d6891108e208f4626aa7667c74ee413b..d739ece6b44ff25960f92088a4023ef794215712 100644
--- a/arch/arm64/boot/dts/qcom/apq8016-sbc-d3-camera-mezzanine.dts
+++ b/arch/arm64/boot/dts/qcom/apq8016-sbc-d3-camera-mezzanine.dtso
@@ -5,10 +5,12 @@
  */
 
 /dts-v1/;
+/plugin/;
 
-#include "apq8016-sbc.dts"
+#include <dt-bindings/clock/qcom,gcc-msm8916.h>
+#include <dt-bindings/gpio/gpio.h>
 
-/ {
+&{/} {
 	camera_vdddo_1v8: regulator-camera-vdddo {
 		compatible = "regulator-fixed";
 		regulator-name = "camera_vdddo";
@@ -38,6 +40,9 @@ &camss {
 	status = "okay";
 
 	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
 		port@0 {
 			reg = <0>;
 			csiphy0_ep: endpoint {
@@ -53,6 +58,9 @@ &cci {
 };
 
 &cci_i2c0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
 	camera@3b {
 		compatible = "ovti,ov5640";
 		reg = <0x3b>;

---
base-commit: 7483c7cc0b2cebf842ec0f5902e354650c4a0d29
change-id: 20230922-apq8016-sbc-camera-dtso-f247bea40f99

Best regards,
-- 
Stephan Gerhold <stephan.gerhold@...aro.org>