On 2021-10-11 14:30, Kalle Valo wrote:
Baochen Qiang <bqiang@xxxxxxxxxxxxxx> writes:
Inform firmware that host is capable of triggering a global reset.
This is requested by firmware team.
Why?
https://wireless.wiki.kernel.org/en/users/drivers/ath10k/submittingpatches#answer_to_why
In some scenarios like rmmod/insmod, HW target needs to be completely
reset. On ARM platforms we can rely on WL_EN pin and other power
regulators to do this. However on x86 or some third party platforms,
this has to be done by ath11k host by writing HW register
PCIE_SOC_GLOBAL_RESET. But the problem is that some HW registers can not
be cleared/restored. With this flag PLATFORM_CAP_PCIE_GLOBAL_RESET in
QMI host_cap message, firmware can do some platform specific operations
to fix this issue.
