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ARM: OMAP3: mmc-twl4030 add cover switch 

Allow a cover switch to be used to cause a rescan of the
MMC slot.

Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Adrian Hunter 2009-03-23 18:23:48 -07:00 committed by Tony Lindgren
parent 034ae7b417
commit 8d75e98b58
2 changed files with 13 additions and 1 deletions
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11
arch/arm/mach-omap2/mmc-twl4030.c
View File

@ -100,6 +100,14 @@ static int twl_mmc_get_ro(struct device *dev, int slot)
return gpio_get_value_cansleep(mmc->slots[0].gpio_wp);
}
static int twl_mmc_get_cover_state(struct device *dev, int slot)
{
struct omap_mmc_platform_data *mmc = dev->platform_data;
/* NOTE: assumes card detect signal is active-low */
return !gpio_get_value_cansleep(mmc->slots[0].switch_pin);
}
/*
* MMC Slot Initialization.
*/
@ -411,6 +419,9 @@ void __init twl4030_mmc_init(struct twl4030_hsmmc_info *controllers)
mmc->slots[0].switch_pin = c->gpio_cd;
mmc->slots[0].card_detect_irq = gpio_to_irq(c->gpio_cd);
if (c->cover_only)
mmc->slots[0].get_cover_state = twl_mmc_get_cover_state;
else
mmc->slots[0].card_detect = twl_mmc_card_detect;
} else
mmc->slots[0].switch_pin = -EINVAL;

1
arch/arm/mach-omap2/mmc-twl4030.h
View File

@ -11,6 +11,7 @@ struct twl4030_hsmmc_info {
u8 wires; /* 1/4/8 wires */
bool transceiver; /* MMC-2 option */
bool ext_clock; /* use external pin for input clock */
bool cover_only; /* No card detect - just cover switch */
int gpio_cd; /* or -EINVAL */
int gpio_wp; /* or -EINVAL */
struct device *dev; /* returned: pointer to mmc adapter */