[PATCH v4 00/19] firmware: qcom: scm: Add minidump SRAM destination support

[Mukesh Ojha]

On most Qualcomm SoCs where minidump is supported, a word in
always-on SRAM is shared between the operating system (OS) and
boot firmware.  Before DDR is initialised on the warm reset
following a crash, firmware reads this word to decide if minidump
is enabled and collect a minidump and where to deliver it:
destination (USB upload to a host, or save to local storage) and
OS is expected to select one destination.

This series wires that mechanism into the SCM driver:

[1]- The SRAM word location is described via a 'sram' phandle on the
  SCM DT node.

[2]- Add minidump-sram pattern property for older soc which supports
  minidump destination support.

[3-4]- Trivial change for consistency.

[5]- A 'minidump_dest' module parameter (default: usb) selects the
  destination.  Custom kernel_param_ops expose it as the human-
  readable strings "usb" or "storage".

[6-19]- Add the support for Kaanapali and other various SoCs.

Change in v4: https://lore.kernel.org/all/20260522195009.2961022-1-mukesh.ojha@xxxxxxxxxxxxxxxx/
 - Refactor commit text for 1, 2, 5.
 - added new commit(3/19) for existing  issue reported by Sasiko .

Changes in v3: https://lore.kernel.org/lkml/20260519171442.1582987-1-mukesh.ojha@xxxxxxxxxxxxxxxx/
 - Addressed some code improvement comments.
 - Removed example from scm binding.
 - Added minidump-sram binding which follows qcom,imem binding.
 - Added some more SoCs which supports this .

Changes in v2: https://lore.kernel.org/lkml/20260507080727.3227367-1-mukesh.ojha@xxxxxxxxxxxxxxxx/
 - Remove the restriction on the binding change done in v1.
 - Remove sram-name from binding.
 - sram definition is introduced and merged, so removed the refs from
   v1.
 - Minor change in the log as per comment s/find/get/
 - remove reference of sram-names
 - use minidump-sram instead of minidump-config.


Mukesh Ojha (19):
  dt-bindings: firmware: qcom,scm: Add minidump SRAM property
  dt-bindings: sram: qcom,imem: Add minidump-sram pattern property
  firmware: qcom: scm: Fix missing smp_load_acquire()
  firmware: qcom: scm: use dev_err_probe() for dload address failure
  firmware: qcom: scm: Add minidump SRAM support
  arm64: dts: qcom: kaanapali: Add minidump SRAM config to SCM node
  arm64: dts: qcom: sm8450: Add minidump SRAM config to SCM node
  arm64: dts: qcom: sa8775p: Add minidump SRAM config to SCM node
  arm64: dts: qcom: qcs8300: Add minidump SRAM config to SCM node
  arm64: dts: qcom: qdu1000: Add minidump SRAM config to SCM node
  arm64: dts: qcom: sm8550: Add minidump SRAM config to SCM node
  arm64: dts: qcom: sm8650: Add minidump SRAM config to SCM node
  arm64: dts: qcom: sc7280: Add minidump SRAM config to SCM node
  arm64: dts: qcom: sm8350: Add minidump SRAM config to SCM node
  arm64: dts: qcom: sc7180: Add minidump SRAM config to SCM node
  arm64: dts: qcom: sm6350: Add minidump SRAM config to SCM node
  arm64: dts: qcom: sm6375: Add minidump SRAM config to SCM node
  arm64: dts: qcom: qcs615: Add minidump SRAM config to SCM node
  arm64: dts: qcom: sdm845: Add minidump SRAM config to SCM node

 .../bindings/firmware/qcom,scm.yaml           |   7 +
 .../devicetree/bindings/sram/qcom,imem.yaml   |  16 +++
 arch/arm64/boot/dts/qcom/kaanapali.dtsi       |   5 +
 arch/arm64/boot/dts/qcom/kodiak.dtsi          |   5 +
 arch/arm64/boot/dts/qcom/lemans.dtsi          |   5 +
 arch/arm64/boot/dts/qcom/monaco.dtsi          |   5 +
 arch/arm64/boot/dts/qcom/qdu1000.dtsi         |   5 +
 arch/arm64/boot/dts/qcom/sc7180.dtsi          |   5 +
 arch/arm64/boot/dts/qcom/sdm845.dtsi          |   5 +
 arch/arm64/boot/dts/qcom/sm6350.dtsi          |   5 +
 arch/arm64/boot/dts/qcom/sm6375.dtsi          |   5 +
 arch/arm64/boot/dts/qcom/sm8350.dtsi          |   5 +
 arch/arm64/boot/dts/qcom/sm8450.dtsi          |   5 +
 arch/arm64/boot/dts/qcom/sm8550.dtsi          |   5 +
 arch/arm64/boot/dts/qcom/sm8650.dtsi          |   5 +
 arch/arm64/boot/dts/qcom/talos.dtsi           |   5 +
 drivers/firmware/qcom/qcom_scm.c              | 120 ++++++++++++++++--
 17 files changed, 201 insertions(+), 12 deletions(-)

-- 
2.53.0