usb: dwc3: omap: remove x_major calculation from revision register

Remove the x_major calculation logic from the wrapper revision register
to differentiate between OMAP5 and AM437x. This was done to find the
register offsets of wrapper register. Now that We do it using dt
compatible, remove the whole logic.

Signed-off-by: George Cherian <george.cherian@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 7 insertions, 32 deletions

diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
index 4af4c3567656..25a6075ef319 100644
--- a/drivers/usb/dwc3/dwc3-omap.c
+++ b/drivers/usb/dwc3/dwc3-omap.c
@@ -77,10 +77,6 @@
 #define USBOTGSS_DEV_EBC_EN                     0x0110
 #define USBOTGSS_DEBUG_OFFSET                   0x0600
 
-/* REVISION REGISTER */
-#define USBOTGSS_REVISION_XMAJOR(reg)           ((reg >> 8) & 0x7)
-#define USBOTGSS_REVISION_XMAJOR1               1
-#define USBOTGSS_REVISION_XMAJOR2               2
 /* SYSCONFIG REGISTER */
 #define USBOTGSS_SYSCONFIG_DMADISABLE           (1 << 16)
 
@@ -129,7 +125,6 @@ struct dwc3_omap {
         u32                     irq_eoi_offset;
         u32                     debug_offset;
         u32                     irq0_offset;
-        u32                     revision;
 
         u32                     dma_status:1;
 
@@ -397,7 +392,6 @@ static int dwc3_omap_probe(struct platform_device *pdev)
         int                     irq;
 
         int                     utmi_mode = 0;
-        int                     x_major;
 
         u32                     reg;
 
@@ -448,32 +442,13 @@ static int dwc3_omap_probe(struct platform_device *pdev)
                 goto err0;
         }
 
-        reg = dwc3_omap_readl(omap->base, USBOTGSS_REVISION);
-        omap->revision = reg;
-        x_major = USBOTGSS_REVISION_XMAJOR(reg);
-
-        /* Differentiate between OMAP5 and AM437x */
-        switch (x_major) {
-        case USBOTGSS_REVISION_XMAJOR1:
-        case USBOTGSS_REVISION_XMAJOR2:
-                omap->irq_eoi_offset = 0;
-                omap->irq0_offset = 0;
-                omap->irqmisc_offset = 0;
-                omap->utmi_otg_offset = 0;
-                omap->debug_offset = 0;
-                break;
-        default:
-                /* Default to the latest revision */
-                omap->irq_eoi_offset = USBOTGSS_EOI_OFFSET;
-                omap->irq0_offset = USBOTGSS_IRQ0_OFFSET;
-                omap->irqmisc_offset = USBOTGSS_IRQMISC_OFFSET;
-                omap->utmi_otg_offset = USBOTGSS_UTMI_OTG_OFFSET;
-                omap->debug_offset = USBOTGSS_DEBUG_OFFSET;
-                break;
-        }
-
-        /* For OMAP5(ES2.0) and AM437x x_major is 2 even though there are
-         * changes in wrapper registers, Using dt compatible for aegis
+        /*
+         * Differentiate between OMAP5 and AM437x.
+         *
+         * For OMAP5(ES2.0) and AM437x wrapper revision is same, even
+         * though there are changes in wrapper register offsets.
+         *
+         * Using dt compatible to differentiate AM437x.
          */
 
         if (of_device_is_compatible(node, "ti,am437x-dwc3")) {