ARM: 6307/1: mmci: allow the card detect GPIO value not to be inverted

On some platforms, the GPIO value from the gpio_cd pin doesn't need to
be inverted to get it active high.  Add a cd_invert platform data
parameter and change existing platforms using GPIO for CD (only
Realview) to enable it.

Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

drivers/mmc/host/mmci.c

@@ -570,12 +570,13 @@ static int mmci_get_ro(struct mmc_host *mmc)
 static int mmci_get_cd(struct mmc_host *mmc)
 {
 	struct mmci_host *host = mmc_priv(mmc);
+	struct mmci_platform_data *plat = host->plat;
 	unsigned int status;
 
 	if (host->gpio_cd == -ENOSYS)
-		status = host->plat->status(mmc_dev(host->mmc));
+		status = plat->status(mmc_dev(host->mmc));
 	else
-		status = !gpio_get_value(host->gpio_cd);
+		status = !!gpio_get_value(host->gpio_cd) ^ plat->cd_invert;
 
 	/*
 	 * Use positive logic throughout - status is zero for no card,