linux-kernel - [PATCH V2 0/2] mailbox: imx: support RST channel

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Message-Id: <20220615130009.1457986-1-peng.fan@oss.nxp.com>
Date:   Wed, 15 Jun 2022 21:00:07 +0800
From:   "Peng Fan (OSS)" <peng.fan@....nxp.com>
To:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        jassisinghbrar@...il.com, shawnguo@...nel.org,
        s.hauer@...gutronix.de
Cc:     kernel@...gutronix.de, festevam@...il.com, linux-imx@....com,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, Peng Fan <peng.fan@....com>
Subject: [PATCH V2 0/2] mailbox: imx: support RST channel

From: Peng Fan <peng.fan@....com>

V2:
 Add R-b tag
 Missed to add mailbox maintainer in V1, add in V2

 To i.MX generic MU, when linux stop remote core, the MU-B side is not
 reset because of hardware design, so MU-B contains valid configuration
 when remote core stops. Then when linux start remote core again, linux
 may notify remote core before remote core is ready for incoming message.
 So we need make sure MU is in reset state before remote core start. So
 add a RST channel which is only to reset MU when shutdown the RST mbox
 channel.

Peng Fan (2):
  dt-bindings: mailbox: imx-mu: add RST channel
  mailbox: imx: support RST channel

 .../devicetree/bindings/mailbox/fsl,mu.yaml   |  6 ++--
 drivers/mailbox/imx-mailbox.c                 | 29 +++++++++++++++----
 2 files changed, 27 insertions(+), 8 deletions(-)

-- 
2.25.1