MMC: Add sysfs file cover_switch

Add sysfs cover_switch with the status of cover.

Signed-off-by: Francisco Alecrim <francisco.alecrim@indt.org.br>
Signed-off-by: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index b5931de..dc8a139 100644 (file)
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -174,6 +174,27 @@ static void send_init_stream(struct mmc_omap_host *host)
        enable_irq(host->irq);
 }
 
+static inline
+int mmc_omap_cover_is_closed(struct mmc_omap_host *host)
+{
+       if (host->pdata->slots[host->slot_id].get_cover_state)
+               return host->pdata->slots[host->slot_id].get_cover_state(host->dev, host->slot_id);
+       return 1;
+}
+
+static ssize_t
+mmc_omap_show_cover_switch(struct device *dev, struct device_attribute *attr,
+                          char *buf)
+{
+       struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev);
+       struct mmc_omap_host *host = mmc_priv(mmc);
+
+       return sprintf(buf, "%s\n", mmc_omap_cover_is_closed(host) ? "closed" :
+                      "open");
+}
+
+static DEVICE_ATTR(cover_switch, S_IRUGO, mmc_omap_show_cover_switch, NULL);
+
 static ssize_t
 mmc_omap_show_slot_name(struct device *dev, struct device_attribute *attr,
                        char *buf)
@@ -475,6 +496,7 @@ static void mmc_omap_detect(struct work_struct *work)
        struct mmc_omap_host *host = container_of(work, struct mmc_omap_host,
                                                mmc_carddetect_work);
 
+       sysfs_notify(&host->mmc->class_dev.kobj, NULL, "cover_switch");
        if (host->carddetect) {
                if (!(OMAP_HSMMC_READ(host->base, HCTL) & SDVSDET)) {
                        /*
@@ -925,9 +947,17 @@ static int __init omap_mmc_probe(struct platform_device *pdev)
                if (ret < 0)
                        goto err_slot_name;
        }
+       if (mmc_slot(host).card_detect_irq && mmc_slot(host).card_detect &&
+                       host->pdata->slots[host->slot_id].get_cover_state) {
+               ret = device_create_file(&mmc->class_dev, &dev_attr_cover_switch);
+               if (ret < 0)
+                       goto err_cover_switch;
+       }
 
        return 0;
 
+err_cover_switch:
+       device_remove_file(&mmc->class_dev, &dev_attr_cover_switch);
 err_slot_name:
        mmc_remove_host(mmc);
 err_irq_cd_init: