ARM: dts: qcom: msm8226: Add IMEM node

This enables userspace to signal the bootloader to go into the
bootloader or recovery mode.

The magic values can be found in both the downstream kernel and the LK
kernel (bootloader).

Signed-off-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
Reviewed-by: Luca Weiss <luca@z3ntu.xyz>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230520121933.15533-5-matti.lehtimaki@gmail.com

diff --git a/arch/arm/boot/dts/qcom-msm8226.dtsi b/arch/arm/boot/dts/qcom-msm8226.dtsi
index dc706d5b185cc8630baaab147e08dc7ac4e9e4ec..a3a9162e9c28eefe54ef31bc11b6f2ec2937380d 100644 (file)
--- a/arch/arm/boot/dts/qcom-msm8226.dtsi
+++ b/arch/arm/boot/dts/qcom-msm8226.dtsi
@@ -647,6 +647,20 @@
                                label = "lpass";
                        };
                };
+
+               sram@fe805000 {
+                       compatible = "qcom,msm8226-imem", "syscon", "simple-mfd";
+                       reg = <0xfe805000 0x1000>;
+
+                       reboot-mode {
+                               compatible = "syscon-reboot-mode";
+                               offset = <0x65c>;
+
+                               mode-bootloader = <0x77665500>;
+                               mode-normal     = <0x77665501>;
+                               mode-recovery   = <0x77665502>;
+                       };
+               };
        };
 
        timer {