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charset="utf-8" Add post-power-off-delay-ms property to MMC controller common. This property shall be used to specify delay if needed after deasserting power during MMC power cycles. Signed-off-by: Judith Mendez --- .../devicetree/bindings/mmc/mmc-controller-common.yaml | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Documentation/devicetree/bindings/mmc/mmc-controller-common.ya= ml b/Documentation/devicetree/bindings/mmc/mmc-controller-common.yaml index 3d7195e9461c3..3ff68d32a308f 100644 --- a/Documentation/devicetree/bindings/mmc/mmc-controller-common.yaml +++ b/Documentation/devicetree/bindings/mmc/mmc-controller-common.yaml @@ -275,6 +275,14 @@ properties: not available. default: 10 =20 + post-power-off-delay-ms: + description: + The presence of this property indicates that the card requires a + delay (in milliseconds) after power off before the next power on. + $ref: /schemas/types.yaml#/definitions/uint32 + minimum: 0 + maximum: 10000 + supports-cqe: $ref: /schemas/types.yaml#/definitions/flag description: --=20 2.54.0 From nobody Sat Jul 25 06:09:17 2026 Received: from mx0a-0002e601.pphosted.com (mx0a-0002e601.pphosted.com [148.163.150.75]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D81173C09E2; 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charset="utf-8" Add support for post-power-off-delay-ms which shall be used to insert a configurable delay post MMC power off. Signed-off-by: Judith Mendez --- drivers/mmc/core/core.c | 8 ++++++-- drivers/mmc/core/host.c | 8 ++++++++ include/linux/mmc/host.h | 1 + 3 files changed, 15 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 29e80e5f928e9..f9049aaf44394 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -1394,8 +1394,12 @@ void mmc_power_off(struct mmc_host *host) void mmc_power_cycle(struct mmc_host *host, u32 ocr) { mmc_power_off(host); - /* Wait at least 1 ms according to SD spec */ - mmc_delay(1); + if (host->post_power_off_delay_ms) { + mmc_delay(host->post_power_off_delay_ms); + } else { + /* Wait at least 1 ms according to SD spec */ + mmc_delay(1); + } mmc_power_up(host, ocr); } =20 diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index b7ce3137d4529..ea8f36827e41c 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -421,6 +421,14 @@ int mmc_of_parse(struct mmc_host *host) device_property_read_u32(dev, "post-power-on-delay-ms", &host->ios.power_delay_ms); =20 + device_property_read_u32(dev, "post-power-off-delay-ms", + &host->post_power_off_delay_ms); + if (host->post_power_off_delay_ms > 10000) { + dev_err(dev, "post-power-off-delay-ms %u exceeds max 10000, setting 1000= 0\n", + host->post_power_off_delay_ms); + host->post_power_off_delay_ms =3D 10000; + } + return mmc_pwrseq_alloc(host); } =20 diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index ba84f02c2a101..b751b61b1116e 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -578,6 +578,7 @@ struct mmc_host { =20 u32 err_stats[MMC_ERR_MAX]; u32 max_sd_hs_hz; + u32 post_power_off_delay_ms; unsigned long private[] ____cacheline_aligned; }; =20 --=20 2.54.0