[PATCH 8/9] dt-bindings: phy: qcom: add MIPI CSI2 mode constants

[Ramshouriesh]

The CSI2-PHY binding references <dt-bindings/phy/phy-qcom-mipi-csi2.h>
and consumers (the x1e80100/hamoa camss DTSI) select D-PHY mode with
PHY_QCOM_CSI2_MODE_DPHY, but the v8 CSI2-PHY series does not ship the
header, so any DT that includes it fails to build.

Add the header with the CSI2 mode constants and cover it in MAINTAINERS.

Signed-off-by: Ramshouriesh <rshouriesh at gmail.com>
---
 MAINTAINERS                                  |  1 +
 include/dt-bindings/phy/phy-qcom-mipi-csi2.h | 15 +++++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index ece71732e6dd..a7ee9f0aaaa8 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -22280,6 +22280,7 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/phy/qcom,*-csi2-phy.yaml
 F:	drivers/phy/qualcomm/phy-qcom-mipi-csi2*.c
 F:	drivers/phy/qualcomm/phy-qcom-mipi-csi2*.h
+F:	include/dt-bindings/phy/phy-qcom-mipi-csi2*
 
 QUALCOMM NAND CONTROLLER DRIVER
 M:	Manivannan Sadhasivam <mani at kernel.org>
diff --git a/include/dt-bindings/phy/phy-qcom-mipi-csi2.h b/include/dt-bindings/phy/phy-qcom-mipi-csi2.h
new file mode 100644
index 000000000000..fa48fd75c58d
--- /dev/null
+++ b/include/dt-bindings/phy/phy-qcom-mipi-csi2.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
+/*
+ * Qualcomm MIPI CSI2 PHY constants
+ *
+ * Copyright (C) 2026 Linaro Limited
+ */
+
+#ifndef __DT_BINDINGS_PHY_MIPI_CSI2__
+#define __DT_BINDINGS_PHY_MIPI_CSI2__
+
+#define PHY_QCOM_CSI2_MODE_DPHY		0
+#define PHY_QCOM_CSI2_MODE_CPHY		1
+#define PHY_QCOM_CSI2_MODE_SPLIT_DPHY	2
+
+#endif /* __DT_BINDINGS_PHY_MIPI_CSI2__ */

-- 
2.53.0