Crashdump collection is enabled based on the DLOAD bit in the TCSR register. This bit is set during bootup and clearing during shutdown. During crash, dload bit is not cleared, due to which uboot starts crashdump collection. Enable the support for download mode to collect the crashdumps if system crashes, to debug crashes extensively. During the bootup, bootloaders initialize the SMEM. However the bootup after crash, SMEM will not be initialized again. If the memory for the SMEM is not reserved, linux consumes that region, which leads to the loss of SMEM data. So, during the next bootup after crash, bootloaders will hang due to invalid data present in the SMEM region. Due to this, added the SMEM support along with crashdump collection series. This patch series adds the support for crashdump collection. DTS patch depends on the IPQ9574 baseport series https://lore.kernel.org/linux-arm-msm/20230206103337.21000-1-quic_devipriy@xxxxxxxxxxx/ V4: - change logs are added to the respective patches. V3 can be found at https://lore.kernel.org/linux-arm-msm/20230208053332.16537-1-quic_poovendh@xxxxxxxxxxx/ Changes in V2: - rebased on linux-next/master - dropped co-developed by tag wherever applicable - V1 can be found at https://lore.kernel.org/linux-arm-kernel/20230113160012.14893-1-quic_poovendh@xxxxxxxxxxx/ Poovendhan Selvaraj (5): dt-bindings: scm: Add compatible for IPQ9574 dt-bindings: mfd: Add the tcsr compatible for IPQ9574 arm64: dts: qcom: ipq9574: Enable the download mode support arm64: dts: qcom: ipq9574: Add SMEM support firmware: scm: Modify only the DLOAD bit in TCSR register for download mode .../bindings/firmware/qcom,scm.yaml | 1 + .../devicetree/bindings/mfd/qcom,tcsr.yaml | 1 + arch/arm64/boot/dts/qcom/ipq9574.dtsi | 26 ++++++++++++++++++- drivers/firmware/qcom_scm.c | 15 +++++++---- 4 files changed, 37 insertions(+), 6 deletions(-) base-commit: 09e41676e35ab06e4bce8870ea3bf1f191c3cb90 -- 2.17.1
