| Message ID | 20250416-wdt_reset_reason-v2-2-c65bba312914@oss.qualcomm.com |
|---|---|
| State | New |
| Headers | show |
| Series | Add support to read the restart reason from IMEM | expand |
On 4/16/25 10:29 AM, Kathiravan Thirumoorthy wrote: > Add the IMEM node to the device tree to extract debugging information > like system restart reason, which is populated via IMEM. Define the > IMEM region to enable this functionality. > > As described, overall IMEM region is 112KB but only initial 4KB is > accessible by all masters in the SoC. > > Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@oss.qualcomm.com> > --- Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com> Konrad
diff --git a/arch/arm64/boot/dts/qcom/ipq5424.dtsi b/arch/arm64/boot/dts/qcom/ipq5424.dtsi index 5d6ed2172b1bb0a57c593f121f387ec917f42419..4f18ea79502738c2b9cb4b13e8eb4ac4ddd89adf 100644 --- a/arch/arm64/boot/dts/qcom/ipq5424.dtsi +++ b/arch/arm64/boot/dts/qcom/ipq5424.dtsi @@ -486,6 +486,15 @@ ssphy_0: phy@7d000 { status = "disabled"; }; + sram@8600000 { + compatible = "qcom,ipq5424-imem", "syscon", "simple-mfd"; + reg = <0 0x08600000 0 0x1c000>; + ranges = <0 0 0x08600000 0x1c000>; + + #address-cells = <1>; + #size-cells = <1>; + }; + usb3: usb3@8a00000 { compatible = "qcom,ipq5424-dwc3", "qcom,dwc3"; reg = <0 0x08af8800 0 0x400>;
Add the IMEM node to the device tree to extract debugging information like system restart reason, which is populated via IMEM. Define the IMEM region to enable this functionality. As described, overall IMEM region is 112KB but only initial 4KB is accessible by all masters in the SoC. Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@oss.qualcomm.com> --- Changes in v2: - Describe the entire IMEM region in the node - Explicitly call out that initial 4K only accessible by all masters in the commit message --- arch/arm64/boot/dts/qcom/ipq5424.dtsi | 9 +++++++++ 1 file changed, 9 insertions(+)