[PATCH] arm64: dts: imx8mp: Describe CSI2 GPIO expander on i.MX8MP DHCOM PDK3 board

[Marek Vasut]

The production PDK3 carrier board rev.200 contains additional GPIO
expander to control power and reset signals for each CSI2 plug
separately. Describe this expander in the carrier board DT. The
label is used by sensor DTOs to reference the expander and its
signals.

Signed-off-by: Marek Vasut <marex at denx.de>
---
Cc: Conor Dooley <conor+dt at kernel.org>
Cc: Fabio Estevam <festevam at gmail.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt at linaro.org>
Cc: Marek Vasut <marex at denx.de>
Cc: NXP Linux Team <linux-imx at nxp.com>
Cc: Pengutronix Kernel Team <kernel at pengutronix.de>
Cc: Rob Herring <robh+dt at kernel.org>
Cc: Sascha Hauer <s.hauer at pengutronix.de>
Cc: Shawn Guo <shawnguo at kernel.org>
Cc: devicetree at vger.kernel.org
Cc: imx at lists.linux.dev
Cc: kernel at dh-electronics.com
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-kernel at vger.kernel.org
---
 arch/arm64/boot/dts/freescale/imx8mp-dhcom-pdk3.dts | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-dhcom-pdk3.dts b/arch/arm64/boot/dts/freescale/imx8mp-dhcom-pdk3.dts
index b749e28e5ede5..ac7ec7533a3c8 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-dhcom-pdk3.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-dhcom-pdk3.dts
@@ -167,6 +167,16 @@ sgtl5000: codec at a {
 				VDDIO-supply = <&reg_vdd_3p3v_awo>;
 			};
 
+			csi2exp: gpio at 24 {
+				compatible = "nxp,pca9570";
+				reg = <0x24>;
+				gpio-controller;
+				#gpio-cells = <2>;
+				gpio-line-names =
+					"CSI2_#RESET", "CSI2_#PWDN",
+					"CSI_#PWDN", "CSI_#RESET";
+			};
+
 			typec at 3d {
 				compatible = "nxp,ptn5150";
 				reg = <0x3d>;
-- 
2.43.0