wifi: ath11k: Suspend hardware before firmware mode off for WCN6750

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During rmmod, the ath11k host driver sends a QMI MODE OFF command
to firmware.
As part of this command, firmware initiates WLAN de-initialization
and accesses certain UMAC registers during this process.
Currently, on WCN6750 WLAN hardware, the system is in a sleep state when
firmware receives the QMI MODE OFF command.
This results in a firmware/hardware reset while accessing the UMAC hardware
registers during sleep state.

To avoid this, add logic to send WCN6750 hardware specific
WMI_PDEV_SUSPEND_AND_DISABLE_INTR command to firmware prior to sending
the QMI MODE OFF command.
This will cause firmware to cease all activities and put the device in
a powered-on state that prevents access to registers which have been
powered off.

Signed-off-by: Balaji Pothunoori <quic_bpothuno@quicinc.com>
Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://patch.msgid.link/20241029083340.3010798-1-quic_bpothuno@quicinc.com
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>

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This commit is contained in:

Balaji Pothunoori 2024-10-29 14:03:40 +05:30 • committed by Jeff Johnson

parent 2b94751626

commit 34cd3bdffa

2 changed files with 46 additions and 0 deletions

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45

drivers/net/wireless/ath/ath11k/core.c

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1

drivers/net/wireless/ath/ath11k/hw.h

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