AT91 MMC 2 : Use platform resources

Use the I/O base-address and IRQ passed to the driver via the
platform_device resources instead of using hardcoded values.

Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

1 files changed, 34 insertions, 7 deletions

diff --git a/drivers/mmc/at91_mci.c b/drivers/mmc/at91_mci.c
index cc0546998367..9a6251a7815d 100644
--- a/drivers/mmc/at91_mci.c
+++ b/drivers/mmc/at91_mci.c
@@ -101,6 +101,7 @@ struct at91mci_host
         struct mmc_request *request;
 
         void __iomem *baseaddr;
+        int irq;
 
         struct at91_mmc_data *board;
         int present;
@@ -792,13 +793,22 @@ static int at91_mci_probe(struct platform_device *pdev)
 {
         struct mmc_host *mmc;
         struct at91mci_host *host;
+        struct resource *res;
         int ret;
 
         pr_debug("Probe MCI devices\n");
 
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res)
+                return -ENXIO;
+
+        if (!request_mem_region(res->start, res->end - res->start + 1, DRIVER_NAME))
+                return -EBUSY;
+
         mmc = mmc_alloc_host(sizeof(struct at91mci_host), &pdev->dev);
         if (!mmc) {
                 pr_debug("Failed to allocate mmc host\n");
+                release_mem_region(res->start, res->end - res->start + 1);
                 return -ENOMEM;
         }
 
@@ -828,27 +838,40 @@ static int at91_mci_probe(struct platform_device *pdev)
         if (IS_ERR(mci_clk)) {
                 printk(KERN_ERR "AT91 MMC: no clock defined.\n");
                 mmc_free_host(mmc);
+                release_mem_region(res->start, res->end - res->start + 1);
                 return -ENODEV;
         }
-        clk_enable(mci_clk);                    /* Enable the peripheral clock */
 
-        host->baseaddr = (void __iomem *)AT91_VA_BASE_MCI;
+        /*
+         * Map I/O region
+         */
+        host->baseaddr = ioremap(res->start, res->end - res->start + 1);
+        if (!host->baseaddr) {
+                clk_put(mci_clk);
+                mmc_free_host(mmc);
+                release_mem_region(res->start, res->end - res->start + 1);
+                return -ENOMEM;
+        }
 
         /*
          * Reset hardware
          */
+        clk_enable(mci_clk);                    /* Enable the peripheral clock */
         at91_mci_disable(host);
         at91_mci_enable(host);
 
         /*
          * Allocate the MCI interrupt
          */
-        ret = request_irq(AT91RM9200_ID_MCI, at91_mci_irq, IRQF_SHARED, DRIVER_NAME, host);
+        host->irq = platform_get_irq(pdev, 0);
+        ret = request_irq(host->irq, at91_mci_irq, IRQF_SHARED, DRIVER_NAME, host);
         if (ret) {
                 printk(KERN_ERR "Failed to request MCI interrupt\n");
                 clk_disable(mci_clk);
                 clk_put(mci_clk);
                 mmc_free_host(mmc);
+                iounmap(host->baseaddr);
+                release_mem_region(res->start, res->end - res->start + 1);
                 return ret;
         }
 
@@ -886,6 +909,7 @@ static int at91_mci_remove(struct platform_device *pdev)
 {
         struct mmc_host *mmc = platform_get_drvdata(pdev);
         struct at91mci_host *host;
+        struct resource *res;
 
         if (!mmc)
                 return -1;
@@ -897,16 +921,19 @@ static int at91_mci_remove(struct platform_device *pdev)
                 cancel_delayed_work(&host->mmc->detect);
         }
 
-        mmc_remove_host(mmc);
         at91_mci_disable(host);
-        free_irq(AT91RM9200_ID_MCI, host);
-        mmc_free_host(mmc);
+        mmc_remove_host(mmc);
+        free_irq(host->irq, host);
 
         clk_disable(mci_clk);                           /* Disable the peripheral clock */
         clk_put(mci_clk);
 
-        platform_set_drvdata(pdev, NULL);
+        iounmap(host->baseaddr);
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        release_mem_region(res->start, res->end - res->start + 1);
 
+        mmc_free_host(mmc);
+        platform_set_drvdata(pdev, NULL);
         pr_debug("MCI Removed\n");
 
         return 0;