From: Krzysztof Kozlowski <krzk@kernel.org>
To: Ulf Hansson <ulf.hansson@oss.qualcomm.com>,
linux-mmc@vger.kernel.org, Ulf Hansson <ulfh@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>,
Kamal Dasu <kamal.dasu@broadcom.com>,
Florian Fainelli <florian.fainelli@broadcom.com>,
Wolfram Sang <wsa+renesas@sang-engineering.com>,
Oleksij Rempel <o.rempel@pengutronix.de>,
linux-kernel@vger.kernel.org,
Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Subject: Re: [PATCH v10 2/6] dt-bindings: mmc: Add reset-card-at-resume property
Date: Tue, 27 Oct 2026 16:33:22 +0100 [thread overview]
Message-ID: <2a29cb8e-28eb-450a-afe9-df543f99b101@kernel.org> (raw)
In-Reply-To: <20261027144051.249211-3-ulf.hansson@oss.qualcomm.com>
On 27/10/2026 15:40, Ulf Hansson wrote:
> From: Kamal Dasu <kamal.dasu@broadcom.com>
>
> 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 <kamal.dasu@broadcom.com>
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Incomplete DCO, missing DT list, so not checked by automation.
Please kindly resend and include all necessary To/Cc entries.
Best regards,
Krzysztof
next prev parent reply other threads:[~2026-10-27 15:33 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-27 14:40 [PATCH v10 0/6] mmc: core: Keep the card powered across suspend when firmware needs it live Ulf Hansson
2026-10-27 14:40 ` [PATCH v10 1/6] dt-bindings: mmc: Extend keep-power-in-suspend beyond SDIO Ulf Hansson
2026-10-27 15:01 ` Shawn Lin
2026-10-27 19:46 ` Ulf Hansson
2026-10-28 0:36 ` Shawn Lin
2026-10-27 15:33 ` Krzysztof Kozlowski
2026-10-27 19:48 ` Ulf Hansson
2026-10-27 20:31 ` Kamal Dasu
2026-10-27 14:40 ` [PATCH v10 2/6] dt-bindings: mmc: Add reset-card-at-resume property Ulf Hansson
2026-10-27 15:33 ` Krzysztof Kozlowski [this message]
2026-10-27 14:40 ` [PATCH v10 3/6] mmc: core: Add option to keep an eMMC powered on at system suspend Ulf Hansson
2026-10-27 15:19 ` Shawn Lin
2026-10-27 14:40 ` [PATCH v10 4/6] mmc: core: Split sdio_set_host_pm_flags() Ulf Hansson
2026-10-27 15:12 ` Shawn Lin
2026-10-27 19:43 ` Ulf Hansson
2026-10-27 14:40 ` [PATCH v10 5/6] mmc: core: Move reset functions for eMMC Ulf Hansson
2026-10-27 15:19 ` Shawn Lin
2026-10-27 14:40 ` [PATCH v10 6/6] mmc: core: Add support for resetting an eMMC at system resume Ulf Hansson
2026-10-27 15:20 ` Shawn Lin
2026-10-27 20:00 ` Kamal Dasu
2026-10-27 19:53 ` [PATCH v10 0/6] mmc: core: Keep the card powered across suspend when firmware needs it live Kamal Dasu
2026-10-28 9:35 ` Ulf Hansson
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