mmc: mxs: use mmc_gpio_get_ro for detecting read-only status

This also fixes that the read-only gpio was used without being
requested.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Chris Ball <cjb@laptop.org>

diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c
index 3dd2f4c..13016e2 100644 (file)
--- a/drivers/mmc/host/mxs-mmc.c
+++ b/drivers/mmc/host/mxs-mmc.c
@@ -38,6 +38,7 @@
 #include <linux/mmc/host.h>
 #include <linux/mmc/mmc.h>
 #include <linux/mmc/sdio.h>
+#include <linux/mmc/slot-gpio.h>
 #include <linux/gpio.h>
 #include <linux/regulator/consumer.h>
 #include <linux/module.h>
@@ -69,26 +70,8 @@ struct mxs_mmc_host {
        unsigned char                   bus_width;
        spinlock_t                      lock;
        int                             sdio_irq_en;
-       int                             wp_gpio;
-       bool                            wp_inverted;
 };
 
-static int mxs_mmc_get_ro(struct mmc_host *mmc)
-{
-       struct mxs_mmc_host *host = mmc_priv(mmc);
-       int ret;
-
-       if (!gpio_is_valid(host->wp_gpio))
-               return -EINVAL;
-
-       ret = gpio_get_value(host->wp_gpio);
-
-       if (host->wp_inverted)
-               ret = !ret;
-
-       return ret;
-}
-
 static int mxs_mmc_get_cd(struct mmc_host *mmc)
 {
        struct mxs_mmc_host *host = mmc_priv(mmc);
@@ -551,7 +534,7 @@ static void mxs_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
 
 static const struct mmc_host_ops mxs_mmc_ops = {
        .request = mxs_mmc_request,
-       .get_ro = mxs_mmc_get_ro,
+       .get_ro = mmc_gpio_get_ro,
        .get_cd = mxs_mmc_get_cd,
        .set_ios = mxs_mmc_set_ios,
        .enable_sdio_irq = mxs_mmc_enable_sdio_irq,
@@ -585,7 +568,7 @@ static int mxs_mmc_probe(struct platform_device *pdev)
        struct mxs_mmc_host *host;
        struct mmc_host *mmc;
        struct resource *iores;
-       int ret = 0, irq_err;
+       int ret = 0, irq_err, gpio;
        struct regulator *reg_vmmc;
        enum of_gpio_flags flags;
        struct mxs_ssp *ssp;
@@ -659,9 +642,14 @@ static int mxs_mmc_probe(struct platform_device *pdev)
                mmc->caps |= MMC_CAP_NEEDS_POLL;
        if (of_property_read_bool(np, "non-removable"))
                mmc->caps |= MMC_CAP_NONREMOVABLE;
-       host->wp_gpio = of_get_named_gpio_flags(np, "wp-gpios", 0, &flags);
-       if (flags & OF_GPIO_ACTIVE_LOW)
-               host->wp_inverted = 1;
+       gpio = of_get_named_gpio_flags(np, "wp-gpios", 0, &flags);
+       if (gpio_is_valid(gpio)) {
+               ret = mmc_gpio_request_ro(mmc, gpio);
+               if (ret)
+                       goto out_clk_disable;
+               if (!(flags & OF_GPIO_ACTIVE_LOW))
+                       mmc->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
+       }
 
        if (of_property_read_bool(np, "cd-inverted"))
                mmc->caps2 |= MMC_CAP2_CD_ACTIVE_HIGH;