diff mbox

mmc: sdio: reset card during power_restore

Message ID BANLkTimhPWxQ57L0JD_r8wXp6o8FdpqJ8w@mail.gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Ohad Ben Cohen June 9, 2011, 3:23 a.m. UTC 
On Wed, Jun 8, 2011 at 11:58 PM, Daniel Drake <dsd@laptop.org> wrote:
>> Please reboot, and immediately after booting (without insmoding the
>> driver) tell me what's the output of :
>>
>> mount -t debugfs none /sys/kernel/debug
>> cat /sys/kernel/debug/mmc1/ios
>
> Which base kernel setup should I run these tests on?

Vanilla, with your temporary patch below.

Without this patch, mmc1 (I assume this what drives sd8686 in your
setup) should be powered on. With it, it should be powered off.

 		host->flags |= SDHCI_AUTO_CMD12;
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diff mbox

Patch

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 58d5436..ce3e2e2 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2488,7 +2488,7 @@  int sdhci_add_host(struct sdhci_host *host)
 	} else
 		mmc->f_min = host->max_clk / SDHCI_MAX_DIV_SPEC_200;

-	mmc->caps |= MMC_CAP_SDIO_IRQ | MMC_CAP_ERASE | MMC_CAP_CMD23;
+	mmc->caps |= MMC_CAP_SDIO_IRQ | MMC_CAP_ERASE | MMC_CAP_CMD23 |
MMC_CAP_POWER_OFF_CARD;

 	if (host->quirks & SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12)