usb: musb: am35x: give it a context structure

that structure currently only holds a device
pointer to our own platform_device and musb's
platform_device, but soon it will hold pointers
to our clock structures and glue-specific bits
and pieces.

Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 28 insertions, 9 deletions

diff --git a/drivers/usb/musb/am35x.c b/drivers/usb/musb/am35x.c
index 0ae01f57b3df..355883c5ffed 100644
--- a/drivers/usb/musb/am35x.c
+++ b/drivers/usb/musb/am35x.c
@@ -82,6 +82,11 @@
 
 #define USB_MENTOR_CORE_OFFSET  0x400
 
+struct am35x_glue {
+        struct device           *dev;
+        struct platform_device  *musb;
+};
+
 static inline void phy_on(void)
 {
         unsigned long timeout = jiffies + msecs_to_jiffies(100);
@@ -544,55 +549,69 @@ static int __init am35x_probe(struct platform_device *pdev)
 {
         struct musb_hdrc_platform_data  *pdata = pdev->dev.platform_data;
         struct platform_device          *musb;
+        struct am35x_glue               *glue;
 
         int                             ret = -ENOMEM;
 
+        glue = kzalloc(sizeof(*glue), GFP_KERNEL);
+        if (!glue) {
+                dev_err(&pdev->dev, "failed to allocate glue context\n");
+                goto err0;
+        }
+
         musb = platform_device_alloc("musb-hdrc", -1);
         if (!musb) {
                 dev_err(&pdev->dev, "failed to allocate musb device\n");
-                goto err0;
+                goto err1;
         }
 
         musb->dev.parent                = &pdev->dev;
         musb->dev.dma_mask              = &am35x_dmamask;
         musb->dev.coherent_dma_mask     = am35x_dmamask;
 
-        platform_set_drvdata(pdev, musb);
+        glue->dev                       = &pdev->dev;
+        glue->musb                      = musb;
+
+        platform_set_drvdata(pdev, glue);
 
         ret = platform_device_add_resources(musb, pdev->resource,
                         pdev->num_resources);
         if (ret) {
                 dev_err(&pdev->dev, "failed to add resources\n");
-                goto err1;
+                goto err2;
         }
 
         ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
         if (ret) {
                 dev_err(&pdev->dev, "failed to add platform_data\n");
-                goto err1;
+                goto err2;
         }
 
         ret = platform_device_add(musb);
         if (ret) {
                 dev_err(&pdev->dev, "failed to register musb device\n");
-                goto err1;
+                goto err2;
         }
 
         return 0;
 
-err1:
+err2:
         platform_device_put(musb);
 
+err1:
+        kfree(glue);
+
 err0:
         return ret;
 }
 
 static int __exit am35x_remove(struct platform_device *pdev)
 {
-        struct platform_device          *musb = platform_get_drvdata(pdev);
+        struct am35x_glue       *glue = platform_get_drvdata(pdev);
 
-        platform_device_del(musb);
-        platform_device_put(musb);
+        platform_device_del(glue->musb);
+        platform_device_put(glue->musb);
+        kfree(glue);
 
         return 0;
 }