This is a note to let you know that I've just added the patch titled
mmc: sdhci: Set SDHCI_POWER_ON with external vmmc
to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mmc-sdhci-set-sdhci_power_on-with-external-vmmc.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3cbc6123a93dc91b99b58f7ea37d267fe93e1cad Mon Sep 17 00:00:00 2001
From: Tim Kryger <tim.kryger@xxxxxxxxx>
Date: Wed, 14 Jan 2015 07:24:12 +0100
Subject: mmc: sdhci: Set SDHCI_POWER_ON with external vmmc
From: Tim Kryger <tim.kryger@xxxxxxxxx>
commit 3cbc6123a93dc91b99b58f7ea37d267fe93e1cad upstream.
Host controllers lacking the required internal vmmc regulator may still
follow the spec with regard to the LSB of SDHCI_POWER_CONTROL. Set the
SDHCI_POWER_ON bit when vmmc is enabled to encourage the controller to
to drive CMD, DAT, SDCLK.
This fixes a regression observed on some Qualcomm and Nvidia boards
caused by 5222161 mmc: sdhci: Improve external VDD regulator support.
Fixes: 52221610dd84 (mmc: sdhci: Improve external VDD regulator support)
Signed-off-by: Tim Kryger <tim.kryger@xxxxxxxxx>
Tested-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxxxxxx>
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/mmc/host/sdhci.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1239,6 +1239,12 @@ static void sdhci_set_power(struct sdhci
spin_unlock_irq(&host->lock);
mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);
spin_lock_irq(&host->lock);
+
+ if (mode != MMC_POWER_OFF)
+ sdhci_writeb(host, SDHCI_POWER_ON, SDHCI_POWER_CONTROL);
+ else
+ sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
+
return;
}
Patches currently in stable-queue which might be from tim.kryger@xxxxxxxxx are
queue-3.18/mmc-sdhci-set-sdhci_power_on-with-external-vmmc.patch
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