[PATCH] riscv: dts: microchip: add qspi compatible fallback

[Conor Dooley <conor.dooley@microchip.com>]

The "hard" QSPI peripheral on PolarFire SoC is derived from version 2
of the FPGA IP core. The original binding had no fallback etc, so this
device tree is valid as is. There was also no functional driver for the
QSPI IP, so no device with a devicetree from a previous mainline
release will regress.

Link: https://lore.kernel.org/linux-spi/7c9f0d96-2882-964a-cd1f-916ddb3f0410@linaro.org/
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
---
See the link for binding discussion. I'll apply this at some point once
the driver makes it upstream.

CC: nagasuresh.relli@microchip.com
CC: valentina.fernandezalanis@microchip.com
CC: broonie@kernel.org
CC: devicetree@vger.kernel.org
CC: krzysztof.kozlowski+dt@linaro.org
CC: robh+dt@kernel.org
CC: linux-kernel@vger.kernel.org
CC: linux-spi@vger.kernel.org
CC: linux-riscv@lists.infradead.org
---
 arch/riscv/boot/dts/microchip/mpfs.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/riscv/boot/dts/microchip/mpfs.dtsi b/arch/riscv/boot/dts/microchip/mpfs.dtsi
index 499c2e63ad35..45e3cc659882 100644
--- a/arch/riscv/boot/dts/microchip/mpfs.dtsi
+++ b/arch/riscv/boot/dts/microchip/mpfs.dtsi
@@ -330,7 +330,7 @@ spi1: spi@20109000 {
 		};
 
 		qspi: spi@21000000 {
-			compatible = "microchip,mpfs-qspi";
+			compatible = "microchip,mpfs-qspi", "microchip,coreqspi-rtl-v2";
 			#address-cells = <1>;
 			#size-cells = <0>;
 			reg = <0x0 0x21000000 0x0 0x1000>;
-- 
2.36.1