Add generic boot-mode support to Enclustra Arria10 and Cyclone5 boards.
Some Enclustra carrier boards need hardware adjustments specific to the
selected boot-mode.

Enclustra's Arria10 SoMs allow for booting from different media. By
muxing certain IO pins, the media can be selected. This muxing can be
done by gpios at runtime e.g. when flashing QSPI from off the
bootloader. But also to have statically certain boot media available,
certain adjustments to the DT are needed:
- SD: QSPI must be disabled
- eMMC: QSPI must be disabled, bus width can be doubled to 8 byte
- QSPI: any mmc is disabled, QSPI then defaults to be enabled

The boot media must be accessible to the bootloader, e.g. to load a
bitstream file, but also to the system to mount the rootfs and to use
the specific performance.

Signed-off-by: Andreas Buerkler <andreas.buerkler@enclustra.com>
Signed-off-by: Lothar Rubusch <l.rubusch@gmail.com>
---
 .../socfpga_enclustra_mercury_bootmode_emmc.dtsi     | 12 ++++++++++++
 .../socfpga_enclustra_mercury_bootmode_qspi.dtsi     |  8 ++++++++
 .../socfpga_enclustra_mercury_bootmode_sdmmc.dtsi    |  8 ++++++++
 3 files changed, 28 insertions(+)
 create mode 100644 arch/arm/boot/dts/intel/socfpga/socfpga_enclustra_mercury_bootmode_emmc.dtsi
 create mode 100644 arch/arm/boot/dts/intel/socfpga/socfpga_enclustra_mercury_bootmode_qspi.dtsi
 create mode 100644 arch/arm/boot/dts/intel/socfpga/socfpga_enclustra_mercury_bootmode_sdmmc.dtsi

diff --git a/arch/arm/boot/dts/intel/socfpga/socfpga_enclustra_mercury_bootmode_emmc.dtsi b/arch/arm/boot/dts/intel/socfpga/socfpga_enclustra_mercury_bootmode_emmc.dtsi
new file mode 100644
index 000000000..d79cb64da
--- /dev/null
+++ b/arch/arm/boot/dts/intel/socfpga/socfpga_enclustra_mercury_bootmode_emmc.dtsi
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0+ OR MIT
+/*
+ * Copyright (C) 2024 Enclustra GmbH - https://www.enclustra.com
+ */
+
+&qspi {
+	status = "disabled";
+};
+
+&mmc {
+	bus-width = <8>;
+};
diff --git a/arch/arm/boot/dts/intel/socfpga/socfpga_enclustra_mercury_bootmode_qspi.dtsi b/arch/arm/boot/dts/intel/socfpga/socfpga_enclustra_mercury_bootmode_qspi.dtsi
new file mode 100644
index 000000000..5ba21dd8f
--- /dev/null
+++ b/arch/arm/boot/dts/intel/socfpga/socfpga_enclustra_mercury_bootmode_qspi.dtsi
@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+ OR MIT
+/*
+ * Copyright (C) 2024 Enclustra GmbH - https://www.enclustra.com
+ */
+
+&mmc {
+	status = "disabled";
+};
diff --git a/arch/arm/boot/dts/intel/socfpga/socfpga_enclustra_mercury_bootmode_sdmmc.dtsi b/arch/arm/boot/dts/intel/socfpga/socfpga_enclustra_mercury_bootmode_sdmmc.dtsi
new file mode 100644
index 000000000..2b102e0b6
--- /dev/null
+++ b/arch/arm/boot/dts/intel/socfpga/socfpga_enclustra_mercury_bootmode_sdmmc.dtsi
@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+ OR MIT
+/*
+ * Copyright (C) 2024 Enclustra GmbH - https://www.enclustra.com
+ */
+
+&qspi {
+	status = "disabled";
+};
-- 
2.25.1