Re: [PATCH v6 2/3] dt-bindings: mmc: Add reset-card-at-resume property
Krzysztof Kozlowski <[email protected]> Wed, 5 Aug 2026 08:58:20 +0200
| Newsgroups | org.kernel.vger.linux-mmc,org.kernel.vger.linux-devicetree,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <20260805-lorikeet-of-marvelous-wholeness-ca84e6@quoll> |
On Tue, Aug 04, 2026 at 04:38:17PM -0400, Kamal Dasu wrote: > On some platforms, firmware or other hardware accesses the card > during suspend/resume, before the kernel's own resume path has run, > leaving the card in a state the kernel can no longer assume it knows. > Add a flag property so such boards can tell the mmc core the card > needs to be reset before it can be used again. > > This is expected to be paired with keep-power-in-suspend on boards > whose firmware needs the card to stay powered and live throughout > suspend: since the card is never power-cycled, nothing else would > force it back to a known state on resume. > > Signed-off-by: Kamal Dasu <[email protected]> Reviewed-by: Krzysztof Kozlowski <[email protected]> Best regards, Krzysztof