linux-kernel - Re: [PATCH v8 09/13] wifi: ath12k: Power up root PD

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Message-ID: <88f8e029-72e6-06de-34a3-beed36a57451@oss.qualcomm.com>
Date: Sat, 1 Mar 2025 10:45:48 +0530
From: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@....qualcomm.com>
To: Raj Kumar Bhagat <quic_rajkbhag@...cinc.com>, ath12k@...ts.infradead.org
Cc: Johannes Berg <johannes@...solutions.net>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>,
        Jeff Johnson <jjohnson@...nel.org>, linux-wireless@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Sowmiya Sree Elavalagan <quic_ssreeela@...cinc.com>
Subject: Re: [PATCH v8 09/13] wifi: ath12k: Power up root PD



On 3/1/2025 12:12 AM, Raj Kumar Bhagat wrote:
> From: Sowmiya Sree Elavalagan <quic_ssreeela@...cinc.com>
> 
> Q6 processor acts as rootPD, other hardware like IPQ5332 which are
> attached to Q6 act as userPDs. WCSS driver handles loading and booting
> of rootPD, while the ath12k driver boots the userPD.
> Get the rproc handle from the DTS entry and boot the rootPD if it
> is not already powered on. Register to the rproc notifier to monitor
> the rproc state, this allows ath12k driver to know power up/down
> sequence of the rootPD. Power up the rootPD and wait for a power-up
> notification from the notifier callback before powering up the userPDs.
> 
> Tested-on: IPQ5332 hw1.0 AHB WLAN.WBE.1.3.1-00130-QCAHKSWPL_SILICONZ-1
> 
> Signed-off-by: Sowmiya Sree Elavalagan <quic_ssreeela@...cinc.com>
> Co-developed-by: Raj Kumar Bhagat <quic_rajkbhag@...cinc.com>
> Signed-off-by: Raj Kumar Bhagat <quic_rajkbhag@...cinc.com>

Reviewed-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@....qualcomm.com>