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From: "Peng Fan (OSS)" <peng.fan@oss.nxp.com>
To: robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org,
shawnguo@kernel.org, s.hauer@pengutronix.de
Cc: kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com,
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linux-arm-kernel@lists.infradead.org, Peng Fan <peng.fan@nxp.com>
Subject: [PATCH 0/2] mailbox: imx: support RST channel
Date: Tue, 17 May 2022 15:35:16 +0800
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mailbox: imx: support RST channel
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expand
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From: Peng Fan <peng.fan@nxp.com> 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(-)