Merge tag 'mailbox-v7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/jassibrar...

Pull mailbox updates from Jassi Brar:
 "Core:
   - add debugfs support for used channels
   - fix resource leak on startup failure
   - propagate tx error codes
   - clarify blocking mode thread support

  Drivers:
   - exynos: remove unused register definitions
   - imx: refactor IRQ handlers, migrate to devm helpers, and other
     minor improvements
   - mpfs: fix syscon presence check in inbox ISR
   - mtk-adsp: fix use-after-free during device teardown
   - qcom: add dt-bindings for QCOM Maili, Hawi, Shikra APCS, and Nord
     CPUCP platform support"

* tag 'mailbox-v7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/jassibrar/mailbox: (23 commits)
  mailbox: imx: Don't force-thread the primary handler
  mailbox: imx: Move the RXDB part of the mailbox into the threaded handler
  mailbox: imx: Move the RX part of the mailbox into the threaded handler
  mailbox: imx: Start splitting the IRQ handler in primary and threaded handler
  mailbox: imx: Use channel index instead of zero in imx_mu_specific_rx()
  mailbox: imx: use devm_of_platform_populate()
  mailbox: imx: Use devm_pm_runtime_enable()
  mailbox: imx: Add a channel shutdown field
  mailbox: imx: Forward the timeout/ error in imx_mu_generic_tx()
  dt-bindings: mailbox: qcom: Add IPCC support for Maili Platform
  mailbox: add list of used channels to debugfs
  mailbox: don't free the channel if the startup callback failed
  mailbox: Make mbox_send_message() return error code when tx fails
  mailbox: Clarify multi-thread is not supported in blocking mode
  mailbox: mtk-adsp: fix UAF during device teardown
  mailbox: qcom: Unify user-visible "Qualcomm" name
  mailbox: exynos: Drop unused register definitions
  dt-bindings: mailbox: qcom: Add IPCC support for Hawi Platform
  dt-bindings: mailbox: qcom,cpucp-mbox: Add Hawi compatible
  dt-bindings: mailbox: qcom: Add Shikra APCS compatible
  ...