linux-kernel - Re: [PATCH 1/6] bus: mhi: ep: Power up/down MHI stack during MHI RESET

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Message-ID: <613e5b54-2e32-640e-a584-df592907c346@quicinc.com>
Date:   Wed, 4 Jan 2023 21:09:58 -0700
From:   Jeffrey Hugo <quic_jhugo@...cinc.com>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        <mhi@...ts.linux.dev>
CC:     <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/6] bus: mhi: ep: Power up/down MHI stack during MHI
 RESET

On 12/28/2022 9:16 AM, Manivannan Sadhasivam wrote:
> During graceful shutdown scenario, host will issue MHI RESET to the
> endpoint device before initiating shutdown. In that case, it makes sense
> to completely power down the MHI stack as sooner or later the access to
> MMIO registers will be prohibited. Also, the stack needs to be powered
> up in the case of SYS_ERR to recover the device.
> 
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

Reviewed-by: Jeffrey Hugo <quic_jhugo@...cinc.com>