MMC: S3C24XX: Allow card-detect on non-IRQ capable pin

Add support to the S3C24XX MMC driver to have the card detect be on
a pin that is not IRQ capable.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

1 files changed, 17 insertions, 11 deletions

diff --git a/drivers/mmc/host/s3cmci.c b/drivers/mmc/host/s3cmci.c
index ffd9269a1874..aa9a8b44b5ea 100644
--- a/drivers/mmc/host/s3cmci.c
+++ b/drivers/mmc/host/s3cmci.c
@@ -1150,8 +1150,6 @@ static int __devinit s3cmci_probe(struct platform_device *pdev, int is2440)
         host->pio_active        = XFER_NONE;
 
         host->dma               = S3CMCI_DMA;
-        host->irq_cd = s3c2410_gpio_getirq(host->pdata->gpio_detect);
-        s3c2410_gpio_cfgpin(host->pdata->gpio_detect, S3C2410_GPIO_IRQ);
 
         host->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         if (!host->mem) {
@@ -1197,14 +1195,20 @@ static int __devinit s3cmci_probe(struct platform_device *pdev, int is2440)
 
         disable_irq(host->irq);
 
-        s3c2410_gpio_cfgpin(host->pdata->gpio_detect, S3C2410_GPIO_IRQ);
-        set_irq_type(host->irq_cd, IRQT_BOTHEDGE);
+        host->irq_cd = s3c2410_gpio_getirq(host->pdata->gpio_detect);
 
-        if (request_irq(host->irq_cd, s3cmci_irq_cd, 0, DRIVER_NAME, host)) {
-                dev_err(&pdev->dev,
-                        "failed to request card detect interrupt.\n");
-                ret = -ENOENT;
-                goto probe_free_irq;
+        if (host->irq_cd >= 0) {
+                if (request_irq(host->irq_cd, s3cmci_irq_cd,
+                                IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+                                DRIVER_NAME, host)) {
+                        dev_err(&pdev->dev, "can't get card detect irq.\n");
+                        ret = -ENOENT;
+                        goto probe_free_irq;
+                }
+        } else {
+                dev_warn(&pdev->dev, "host detect has no irq available\n");
+                s3c2410_gpio_cfgpin(host->pdata->gpio_detect,
+                                    S3C2410_GPIO_INPUT);
         }
 
         if (host->pdata->gpio_wprotect)
@@ -1273,7 +1277,8 @@ static int __devinit s3cmci_probe(struct platform_device *pdev, int is2440)
         clk_put(host->clk);
 
  probe_free_irq_cd:
-        free_irq(host->irq_cd, host);
+        if (host->irq_cd >= 0)
+                free_irq(host->irq_cd, host);
 
  probe_free_irq:
         free_irq(host->irq, host);
@@ -1303,7 +1308,8 @@ static int __devexit s3cmci_remove(struct platform_device *pdev)
         tasklet_disable(&host->pio_tasklet);
         s3c2410_dma_free(S3CMCI_DMA, &s3cmci_dma_client);
 
-        free_irq(host->irq_cd, host);
+        if (host->irq_cd >= 0)
+                free_irq(host->irq_cd, host);
         free_irq(host->irq, host);
 
         iounmap(host->base);