mailbox api · Maintained

Maintainers

• M Jassi Brar <jassisinghbrar@gmail.com>

Paths

• F Documentation/devicetree/bindings/mailbox/
• F drivers/mailbox/
• F include/dt-bindings/mailbox/
• F include/linux/mailbox_client.h
• F include/linux/mailbox_controller.h

Last 30 days

Most active threads (last 7 days)

• HOTtoday [PATCH 00/10] Add support for Apple Silicon DockChannel internal keyboards
  2026-06-30 12:55 · 3 replies in 7d · Michael Reeves via B4 Relay <devnull+michael.reeves077.gmail.com@kernel.org>

Active reviewers (last 30 days)

• Peng Fan <peng.fan@nxp.com>
  8 attestations (8 Reviewed-by) · last on 2026-06-17
• Mathieu Poirier <mathieu.poirier@linaro.org>
  8 attestations (8 Reviewed-by) · last on 2026-06-17
• Hector Martin <hidden>
  1 attestation (1 Co-developed-by) · last on 2026-06-30

Recent patches

Most-recent 30 patches in this subsystem on linux-arm-kernel (capped at 30), ordered by date desc.

• HOTtoday [PATCH 01/10] dt-bindings: mailbox: Add Apple t8122 ASC mailbox
  2026-06-30 · Michael Reeves via B4 Relay <devnull+michael.reeves077.gmail.com@kernel.org>
• HOTtoday [PATCH 02/10] dt-bindings: mailbox: apple: Add DockChannel mailbox
  2026-06-30 · Michael Reeves via B4 Relay <devnull+michael.reeves077.gmail.com@kernel.org>
• HOTtoday [PATCH 05/10] mailbox: apple: Add DockChannel FIFO controller
  2026-06-30 · Michael Reeves via B4 Relay <devnull+michael.reeves077.gmail.com@kernel.org>
• COOLING9d [PATCH] mailbox: imx: return TXDB_V2 timeout errors
  2026-06-24 · Pengpeng Hou <hidden>
• COOLING6d Re: [PATCH v3 01/10] mailbox: imx: Forward the timeout/ error in imx_mu_generic_tx()
  2026-06-18 · Peng Fan <hidden>
• COOLING6d REVIEWED: 4 (4M) [PATCH v3 08/10] mailbox: imx: Move the RXDB part of the mailbox into the threaded handler
  2026-06-17 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• COOLING6d REVIEWED: 4 (4M) [PATCH v3 07/10] mailbox: imx: Move the RX part of the mailbox into the threaded handler
  2026-06-17 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• COOLING6d REVIEWED: 4 (4M) [PATCH v3 09/10] mailbox: imx: Don't force-thread the primary handler
  2026-06-17 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• COOLING6d REVIEWED: 4 (4M) [PATCH v3 05/10] mailbox: imx: Use channel index instead of zero in imx_mu_specific_rx()
  2026-06-17 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• COOLING6d REVIEWED: 4 (4M) [PATCH v3 06/10] mailbox: imx: Start splitting the IRQ handler in primary and threaded handler
  2026-06-17 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• COOLING6d REVIEWED: 4 (4M) [PATCH v3 03/10] mailbox: imx: Use devm_pm_runtime_enable()
  2026-06-17 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• COOLING6d REVIEWED: 4 (4M) [PATCH v3 04/10] mailbox: imx: use devm_of_platform_populate()
  2026-06-17 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• COOLING6d [PATCH v3 01/10] mailbox: imx: Forward the timeout/ error in imx_mu_generic_tx()
  2026-06-17 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• COOLING6d REVIEWED: 4 (4M) [PATCH v3 02/10] mailbox: imx: Add a channel shutdown field
  2026-06-17 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• COLD30d [PATCH v01] mailbox/pcc.c: add query channel function
  2026-06-04 · Adam Young <hidden>
• COLD31d [PATCH v01] mailbox/pcc.c: ignore errors on type 4 channels.
  2026-06-04 · Adam Young <hidden>
• COLD27d [PATCH v2 6/9] mailbox: imx: Move the RX part of the mailbox into the threaded handler
  2026-06-03 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• COLD27d [PATCH v2 7/9] mailbox: imx: Move the RXDB part of the mailbox into the threaded handler
  2026-06-03 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• COLD27d [PATCH v2 5/9] mailbox: imx: Start splitting the IRQ handler in primary and threaded handler
  2026-06-03 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• COLD27d [PATCH v2 8/9] mailbox: imx: Don't force-thread the primary handler
  2026-06-03 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• COLD27d [PATCH v2 4/9] mailbox: imx: Use channel index instead of zero in imx_mu_specific_rx()
  2026-06-03 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• COLD27d [PATCH v2 2/9] mailbox: imx: Use devm_pm_runtime_enable()
  2026-06-03 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• COLD27d [PATCH v2 3/9] mailbox: imx: use devm_of_platform_populate()
  2026-06-03 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• COLD27d [PATCH v2 1/9] mailbox: imx: Add a channel shutdown field
  2026-06-03 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• COLD33d [PATCH 4/5] mailbox: imx: Don't force-thread the primary handler
  2026-05-29 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• COLD33d [PATCH 3/5] mailbox: imx: Move the RXDB part of the mailbox into the threaded handler
  2026-05-29 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• COLD33d [PATCH 2/5] mailbox: imx: Move the RX part of the mailbox into the threaded handler
  2026-05-29 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• COLD33d [PATCH 1/5] mailbox: imx: Start splitting the IRQ handler in primary and threaded handler
  2026-05-29 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• COLD32d [PATCH v02] mailbox/pcc.c shmem map/unmap in callbacks
  2026-05-22 · Adam Young <hidden>
• COLD30d [PATCH v02] mailbox: pcc: report errors for PCC clients
  2026-05-18 · Adam Young <hidden>

Needs attention (review trailers in, no pickup)

Patches with review trailers that haven't landed in mainline and haven't been Acked by a maintainer. Oldest first.

• STALE140d REVIEWED: 2 (2M) [PATCH AUTOSEL 6.19-6.1] mailbox: imx: Skip the suspend flag for i.MX7ULP
  2026-02-15 · Sasha Levin <sashal@kernel.org> · 1 Reviewed-by
• STALE118d REVIEWED: 11 (11M) [PATCH v2] mailbox: remove superfluous internal header
  2026-03-09 · Wolfram Sang <wsa+renesas@sang-engineering.com> · 1 Reviewed-by
• STALE98d REVIEWED: 12 (12M) [PATCH v3] mailbox: remove superfluous internal header
  2026-03-27 · Wolfram Sang <wsa+renesas@sang-engineering.com> · 2 Reviewed-by
• STALE98d REVIEWED: 10 (10M) [PATCH v2] mailbox: exynos: drop superfluous mbox setting per channel
  2026-03-27 · Wolfram Sang <wsa+renesas@sang-engineering.com> · 1 Reviewed-by, 1 Tested-by
• STALE95d REVIEWED: 4 (4M) [PATCH] mailbox: Fix NULL message support in mbox_send_message()
  2026-03-27 · jassisinghbrar@gmail.com · 1 Reviewed-by
• COLD27d REVIEWED: 6 (5M) [PATCH v3 1/2] dt-bindings: mailbox: google,gs101-mbox: Add samsung,exynos850-mbox
  2026-04-29 · Alexey Klimov <alexey.klimov@linaro.org> · 2 Reviewed-by
• COLD27d REVIEWED: 1 (0M) [PATCH v3 2/2] mailbox: exynos: Add support for Exynos850 mailbox
  2026-04-29 · Alexey Klimov <alexey.klimov@linaro.org> · 1 Reviewed-by
• COOLING6d REVIEWED: 4 (4M) [PATCH v3 02/10] mailbox: imx: Add a channel shutdown field
  2026-06-17 · Sebastian Andrzej Siewior <bigeasy@linutronix.de> · 2 Reviewed-by
• COOLING6d REVIEWED: 4 (4M) [PATCH v3 03/10] mailbox: imx: Use devm_pm_runtime_enable()
  2026-06-17 · Sebastian Andrzej Siewior <bigeasy@linutronix.de> · 2 Reviewed-by
• COOLING6d REVIEWED: 4 (4M) [PATCH v3 04/10] mailbox: imx: use devm_of_platform_populate()
  2026-06-17 · Sebastian Andrzej Siewior <bigeasy@linutronix.de> · 2 Reviewed-by

Quiet for 30+ days

Patches with no review trailers and no replies. Either the author is heads-down elsewhere or these slipped through. Oldest first.

• STALE61d [PATCH AUTOSEL 7.0-6.18] mailbox: cix: Add IRQF_NO_SUSPEND to mailbox interrupt
  2026-05-05 · Sasha Levin <sashal@kernel.org>