usb: dwc3: core: cache GHWPARAMS* registers

cache the contents of GHWPARAMS* registers in
our device structure for easy access.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index cfb074548124..d35f90527c38 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -229,6 +229,21 @@ static void dwc3_event_buffers_cleanup(struct dwc3 *dwc)
         }
 }
 
+static void __devinit dwc3_cache_hwparams(struct dwc3 *dwc)
+{
+        struct dwc3_hwparams    *parms = &dwc->hwparams;
+
+        parms->hwparams0 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS0);
+        parms->hwparams1 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS1);
+        parms->hwparams2 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS2);
+        parms->hwparams3 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS3);
+        parms->hwparams4 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS4);
+        parms->hwparams5 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS5);
+        parms->hwparams6 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS6);
+        parms->hwparams7 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS7);
+        parms->hwparams8 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS8);
+}
+
 /**
  * dwc3_core_init - Low-level initialization of DWC3 Core
  * @dwc: Pointer to our controller context structure
@@ -283,6 +298,8 @@ static int __devinit dwc3_core_init(struct dwc3 *dwc)
                 goto err1;
         }
 
+        dwc3_cache_hwparams(dwc);
+
         return 0;
 
 err1: