MMC: S3C24XX: Add support to invert write protect line

Support for inverting the sense of the MMC driver's write protect detection line. Signed-off-by: Ben Dooks <[email protected]> Signed-off-by: Pierre Ossman <[email protected]>
cail · Jul 15, 2008 · cf0984c · cf0984c
1 parent edb5a98
commit cf0984c
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Showing 2 changed files with 11 additions and 2 deletions.
diff --git a/drivers/mmc/host/s3cmci.c b/drivers/mmc/host/s3cmci.c
@@ -1083,11 +1083,18 @@ static void s3cmci_reset(struct s3cmci_host *host)
 static int s3cmci_get_ro(struct mmc_host *mmc)
 {
 	struct s3cmci_host *host = mmc_priv(mmc);
+	struct s3c24xx_mci_pdata *pdata = host->pdata;
+	int ret;
 
-	if (host->pdata->gpio_wprotect == 0)
+	if (pdata->gpio_wprotect == 0)
 		return 0;
 
-	return s3c2410_gpio_getpin(host->pdata->gpio_wprotect);
+	ret = s3c2410_gpio_getpin(pdata->gpio_wprotect);
+
+	if (pdata->wprotect_invert)
+		ret = !ret;
+
+	return ret;
 }
 
 static struct mmc_host_ops s3cmci_ops = {

diff --git a/include/asm-arm/plat-s3c24xx/mci.h b/include/asm-arm/plat-s3c24xx/mci.h
@@ -2,6 +2,8 @@
 #define _ARCH_MCI_H
 
 struct s3c24xx_mci_pdata {
+	unsigned int	wprotect_invert : 1;
+
 	unsigned int	gpio_detect;
 	unsigned int	gpio_wprotect;
 	unsigned long	ocr_avail;