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ARM: OMAP4: MMC: no regulator off during probe for eMMC

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eMMC does not handle power off when not in sleep state,
Skip regulator disable during probe when eMMC is
not in known state - state left by bootloader.

Resolves eMMC failure on OMAP4
mmc0: error -110 whilst initialising MMC card

Signed-off-by: Balaji T K <balajitk@ti.com>
Tested-by: Kishore Kadiyala <kishore.kadiyala@ti.com>
Acked-by: Kishore Kadiyala <kishore.kadiyala@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Balaji T K
2011-05-30 19:55:34 +05:30
committed by Tony Lindgren
parent e68273baf3
commit b1c1df7a7d
5 changed files with 11 additions and 0 deletions
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3
drivers/mmc/host/omap_hsmmc.c
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@ -435,6 +435,9 @@ static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host)
reg = regulator_get(host->dev, "vmmc_aux");
host->vcc_aux = IS_ERR(reg) ? NULL : reg;
/* For eMMC do not power off when not in sleep state */
if (mmc_slot(host).no_regulator_off_init)
return 0;
/*
* UGLY HACK: workaround regulator framework bugs.
* When the bootloader leaves a supply active, it's