[PATCH] Add write protection switch handling to the PXA MMC driver

Add a write protection switch handling code to the PXA MMC driver so
that platform specific code can provide it if available.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 12 insertions, 0 deletions

diff --git a/drivers/mmc/pxamci.c b/drivers/mmc/pxamci.c
index b78beb1b0159..e99a53b09e32 100644
--- a/drivers/mmc/pxamci.c
+++ b/drivers/mmc/pxamci.c
@@ -362,6 +362,16 @@ static void pxamci_request(struct mmc_host *mmc, struct mmc_request *mrq)
         pxamci_start_cmd(host, mrq->cmd, cmdat);
 }
 
+static int pxamci_get_ro(struct mmc_host *mmc)
+{
+        struct pxamci_host *host = mmc_priv(mmc);
+
+        if (host->pdata && host->pdata->get_ro)
+                return host->pdata->get_ro(mmc->dev);
+        /* Host doesn't support read only detection so assume writeable */
+        return 0;
+}
+
 static void pxamci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 {
         struct pxamci_host *host = mmc_priv(mmc);
@@ -401,6 +411,7 @@ static void pxamci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 
 static struct mmc_host_ops pxamci_ops = {
         .request        = pxamci_request,
+        .get_ro         = pxamci_get_ro,
         .set_ios        = pxamci_set_ios,
 };
 
diff --git a/include/asm-arm/arch-pxa/mmc.h b/include/asm-arm/arch-pxa/mmc.h
index 7492ea7ea614..9718063a2119 100644
--- a/include/asm-arm/arch-pxa/mmc.h
+++ b/include/asm-arm/arch-pxa/mmc.h
@@ -10,6 +10,7 @@ struct mmc_host;
 struct pxamci_platform_data {
         unsigned int ocr_mask;                  /* available voltages */
         int (*init)(struct device *, irqreturn_t (*)(int, void *, struct pt_regs *), void *);
+        int (*get_ro)(struct device *);
         void (*setpower)(struct device *, unsigned int);
         void (*exit)(struct device *, void *);
 };