brcmfmac: Avoid keeping power to SDIO card unless WOWL is used

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Keeping the power to the SDIO card during system wide suspend, consumes
energy. Especially on battery driven embedded systems, this can be a
problem. Therefore, let's change the behaviour into allowing the SDIO card
to be powered off, unless WOWL is supported and enabled.

Note that, the downside from this change, is that during system resume the
SDIO card needs to be re-initialized and the FW must be re-programmed. Even
if this may take some time to complete, it should we worth it, rather than
draining the battery.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Christophe Roullier <christophe.roullier@foss.st.com>
Reviewed-by: Yann Gautier <yann.gautier@foss.st.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220323083950.414783-1-ulf.hansson@linaro.org

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Ulf Hansson 2022-03-23 09:39:50 +01:00 • committed by Kalle Valo

parent 3e12968f6d

commit 92cadedd9d

1 changed files with 22 additions and 17 deletions

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drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c

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