linux-kernel - [PATCH] devicetree: zynqmp.dtsi: Add bootmode selection support

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Date:   Wed, 19 Feb 2020 13:20:36 +0100
From:   Mike Looijmans <mike.looijmans@...ic.nl>
To:     robh+dt@...nel.org, michal.simek@...inx.com, mark.rutland@....com,
        devicetree@...r.kernel.org
Cc:     m.tretter@...gutronix.de, nava.manne@...inx.com,
        rajan.vaja@...inx.com, manish.narani@...inx.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Mike Looijmans <mike.looijmans@...ic.nl>
Subject: [PATCH] devicetree: zynqmp.dtsi: Add bootmode selection support

Add bootmode override support for ZynqMP devices. Allows one to select
a boot device by running "reboot qspi32" for example. Activate config
item CONFIG_SYSCON_REBOOT_MODE to make this work.

Signed-off-by: Mike Looijmans <mike.looijmans@...ic.nl>
---
 arch/arm64/boot/dts/xilinx/zynqmp.dtsi | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
index 26d926eb1431..4c38d77ecbba 100644
--- a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
+++ b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
@@ -246,6 +246,30 @@
 			};
 		};
 
+		/* Clock and Reset control registers for LPD */
+		lpd_apb: apb@...e0000 {
+			compatible = "syscon", "simple-mfd";
+			reg = <0x0 0xff5e0000 0x0 0x400>;
+			reboot-mode {
+				compatible = "syscon-reboot-mode";
+				offset = <0x200>;
+				mask = <0xf100>;
+				/* Bit(8) is the "force user" bit */
+				mode-normal = <0x0000>;
+				mode-psjtag = <0x0100>;
+				mode-qspi24 = <0x1100>;
+				mode-qspi32 = <0x2100>;
+				mode-sd0    = <0x3100>;
+				mode-nand   = <0x4100>;
+				mode-sd1    = <0x6100>;
+				mode-emmc   = <0x6100>;
+				mode-usb0   = <0x7100>;
+				mode-pjtag0 = <0x8100>;
+				mode-pjtag1 = <0x9100>;
+				mode-sd1ls  = <0xe100>;
+			};
+		};
+
 		/* GDMA */
 		fpd_dma_chan1: dma@...00000 {
 			status = "disabled";
-- 
2.17.1