usb: cdns3: Adds missing __iomem markers

Patch adds missing __iomem markers in core.h file
and makes some changes in drd.c file related with
these markers.

The lack of __iomem has reported by sparse checker
on parsic architecture.
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Pawel Laszczak <pawell@cadence.com>
Signed-off-by: Peter Chen <peter.chen@kernel.org>

drivers/usb/cdns3/core.h

@@ -87,11 +87,11 @@ struct cdns {
 	struct cdns3_usb_regs __iomem	*dev_regs;
 
 	struct resource				otg_res;
-	struct cdns3_otg_legacy_regs	*otg_v0_regs;
-	struct cdns3_otg_regs		*otg_v1_regs;
-	struct cdnsp_otg_regs		*otg_cdnsp_regs;
-	struct cdns_otg_common_regs	*otg_regs;
-	struct cdns_otg_irq_regs	*otg_irq_regs;
+	struct cdns3_otg_legacy_regs __iomem	*otg_v0_regs;
+	struct cdns3_otg_regs __iomem		*otg_v1_regs;
+	struct cdnsp_otg_regs __iomem		*otg_cdnsp_regs;
+	struct cdns_otg_common_regs __iomem	*otg_regs;
+	struct cdns_otg_irq_regs __iomem	*otg_irq_regs;
 #define CDNS3_CONTROLLER_V0	0
 #define CDNS3_CONTROLLER_V1	1
 #define CDNSP_CONTROLLER_V2	2

drivers/usb/cdns3/drd.c

@@ -27,7 +27,7 @@
  */
 static int cdns_set_mode(struct cdns *cdns, enum usb_dr_mode mode)
 {
-	u32 __iomem *override_reg;
+	void __iomem  *override_reg;
 	u32 reg;
 
 	switch (mode) {
@@ -406,7 +406,7 @@ int cdns_drd_init(struct cdns *cdns)
 		cdns->otg_v1_regs = NULL;
 		cdns->otg_cdnsp_regs = NULL;
 		cdns->otg_regs = regs;
-		cdns->otg_irq_regs = (struct cdns_otg_irq_regs *)
+		cdns->otg_irq_regs = (struct cdns_otg_irq_regs __iomem  *)
 				     &cdns->otg_v0_regs->ien;
 		writel(1, &cdns->otg_v0_regs->simulate);
 		dev_dbg(cdns->dev, "DRD version v0 (%08x)\n",
@@ -416,14 +416,14 @@ int cdns_drd_init(struct cdns *cdns)
 		cdns->otg_v1_regs = regs;
 		cdns->otg_cdnsp_regs = regs;
 
-		cdns->otg_regs = (void *)&cdns->otg_v1_regs->cmd;
+		cdns->otg_regs = (void __iomem *)&cdns->otg_v1_regs->cmd;
 
-		if (cdns->otg_cdnsp_regs->did == OTG_CDNSP_DID) {
-			cdns->otg_irq_regs = (struct cdns_otg_irq_regs *)
+		if (readl(&cdns->otg_cdnsp_regs->did) == OTG_CDNSP_DID) {
+			cdns->otg_irq_regs = (struct cdns_otg_irq_regs __iomem *)
 					      &cdns->otg_cdnsp_regs->ien;
 			cdns->version  = CDNSP_CONTROLLER_V2;
 		} else {
-			cdns->otg_irq_regs = (struct cdns_otg_irq_regs *)
+			cdns->otg_irq_regs = (struct cdns_otg_irq_regs __iomem *)
 					      &cdns->otg_v1_regs->ien;
 			writel(1, &cdns->otg_v1_regs->simulate);
 			cdns->version  = CDNS3_CONTROLLER_V1;