usb: musb: split am35x to its own platform_driver

Just adding its own platform_driver, not really
using it yet.

When all HW glue layers are converted, more patches
will come to split power management code from musb_core
and move it completely to HW glue layer.

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

3 files changed, 86 insertions, 1 deletions

diff --git a/arch/arm/mach-omap2/usb-musb.c b/arch/arm/mach-omap2/usb-musb.c
index 542387a598ed..9107883287f6 100644
--- a/arch/arm/mach-omap2/usb-musb.c
+++ b/arch/arm/mach-omap2/usb-musb.c
@@ -93,6 +93,7 @@ void __init usb_musb_init(struct omap_musb_board_data *board_data)
         if (cpu_is_omap243x()) {
                 musb_resources[0].start = OMAP243X_HS_BASE;
         } else if (cpu_is_omap3517() || cpu_is_omap3505()) {
+                musb_device.name = "musb-am35x";
                 musb_resources[0].start = AM35XX_IPSS_USBOTGSS_BASE;
                 musb_resources[1].start = INT_35XX_USBOTG_IRQ;
         } else if (cpu_is_omap34xx()) {
diff --git a/drivers/usb/musb/Makefile b/drivers/usb/musb/Makefile
index 4792001a3d06..a48c86d9b4d0 100644
--- a/drivers/usb/musb/Makefile
+++ b/drivers/usb/musb/Makefile
@@ -17,10 +17,10 @@ musb_hdrc-$(CONFIG_DEBUG_FS)			+= musb_debugfs.o
 musb_hdrc-$(CONFIG_USB_MUSB_DAVINCI)            += davinci.o
 musb_hdrc-$(CONFIG_USB_MUSB_DA8XX)              += da8xx.o
 musb_hdrc-$(CONFIG_USB_MUSB_TUSB6010)           += tusb6010.o
-musb_hdrc-$(CONFIG_USB_MUSB_AM35X)              += am35x.o
 musb_hdrc-$(CONFIG_USB_MUSB_BLACKFIN)           += blackfin.o
 
 obj-$(CONFIG_USB_MUSB_OMAP2PLUS)                += omap2430.o
+obj-$(CONFIG_USB_MUSB_AM35X)                    += am35x.o
 
 # the kconfig must guarantee that only one of the
 # possible I/O schemes will be enabled at a time ...
diff --git a/drivers/usb/musb/am35x.c b/drivers/usb/musb/am35x.c
index be17610d7fc2..0ae01f57b3df 100644
--- a/drivers/usb/musb/am35x.c
+++ b/drivers/usb/musb/am35x.c
@@ -29,6 +29,8 @@
 #include <linux/init.h>
 #include <linux/clk.h>
 #include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
 
 #include <plat/control.h>
 #include <plat/usb.h>
@@ -535,3 +537,85 @@ const struct musb_platform_ops musb_ops = {
 
         .set_vbus       = am35x_musb_set_vbus,
 };
+
+static u64 am35x_dmamask = DMA_BIT_MASK(32);
+
+static int __init am35x_probe(struct platform_device *pdev)
+{
+        struct musb_hdrc_platform_data  *pdata = pdev->dev.platform_data;
+        struct platform_device          *musb;
+
+        int                             ret = -ENOMEM;
+
+        musb = platform_device_alloc("musb-hdrc", -1);
+        if (!musb) {
+                dev_err(&pdev->dev, "failed to allocate musb device\n");
+                goto err0;
+        }
+
+        musb->dev.parent                = &pdev->dev;
+        musb->dev.dma_mask              = &am35x_dmamask;
+        musb->dev.coherent_dma_mask     = am35x_dmamask;
+
+        platform_set_drvdata(pdev, musb);
+
+        ret = platform_device_add_resources(musb, pdev->resource,
+                        pdev->num_resources);
+        if (ret) {
+                dev_err(&pdev->dev, "failed to add resources\n");
+                goto err1;
+        }
+
+        ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
+        if (ret) {
+                dev_err(&pdev->dev, "failed to add platform_data\n");
+                goto err1;
+        }
+
+        ret = platform_device_add(musb);
+        if (ret) {
+                dev_err(&pdev->dev, "failed to register musb device\n");
+                goto err1;
+        }
+
+        return 0;
+
+err1:
+        platform_device_put(musb);
+
+err0:
+        return ret;
+}
+
+static int __exit am35x_remove(struct platform_device *pdev)
+{
+        struct platform_device          *musb = platform_get_drvdata(pdev);
+
+        platform_device_del(musb);
+        platform_device_put(musb);
+
+        return 0;
+}
+
+static struct platform_driver am35x_driver = {
+        .remove         = __exit_p(am35x_remove),
+        .driver         = {
+                .name   = "musb-am35x",
+        },
+};
+
+MODULE_DESCRIPTION("AM35x MUSB Glue Layer");
+MODULE_AUTHOR("Ajay Kumar Gupta <ajay.gupta@ti.com>");
+MODULE_LICENSE("GPL v2");
+
+static int __init am35x_init(void)
+{
+        return platform_driver_probe(&am35x_driver, am35x_probe);
+}
+subsys_initcall(am35x_init);
+
+static void __exit am35x_exit(void)
+{
+        platform_driver_unregister(&am35x_driver);
+}
+module_exit(am35x_exit);