mmc: mxcmmc: use slot-gpio API for write-protect detection
slot-gpio API suppors read-only detection when "wp-gpios"
property is present in the device tree mmc node. Use this
API for write-protect detection.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/drivers/mmc/host/mxcmmc.c b/drivers/mmc/host/mxcmmc.c
index 3f8d339..df28ebf 100644
--- a/drivers/mmc/host/mxcmmc.c
+++ b/drivers/mmc/host/mxcmmc.c
@@ -38,6 +38,7 @@
#include <linux/of_device.h>
#include <linux/of_dma.h>
#include <linux/of_gpio.h>
+#include <linux/mmc/slot-gpio.h>
#include <asm/dma.h>
#include <asm/irq.h>
@@ -917,10 +918,11 @@
if (host->pdata && host->pdata->get_ro)
return !!host->pdata->get_ro(mmc_dev(mmc));
/*
- * Board doesn't support read only detection; let the mmc core
- * decide what to do.
+ * If board doesn't support read only detection (no mmc_gpio
+ * context or gpio is invalid), then let the mmc core decide
+ * what to do.
*/
- return -ENOSYS;
+ return mmc_gpio_get_ro(mmc);
}
static void mxcmci_enable_sdio_irq(struct mmc_host *mmc, int enable)