dwc3: host: Enable USB3 LPM capability

All dwc3 based xhci host controller supports USB3.0 LPM functionality.
Therefore enable it in platform data for all dwc3 based xhci device if
DWC3_HOST_USB3_LPM_ENABLE is selected in Kconfig.

Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-of-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig
index 261c3b428220c141ac263bb8ce93c550bace98ea..785510a0a0c3fdff54a8627472eb07c5de73a3df 100644 (file)
--- a/drivers/usb/dwc3/Kconfig
+++ b/drivers/usb/dwc3/Kconfig
@@ -93,4 +93,11 @@ config USB_DWC3_VERBOSE
        help
          Say Y here to enable verbose debugging messages on DWC3 Driver.
 
+config DWC3_HOST_USB3_LPM_ENABLE
+       bool "Enable USB3 LPM Capability"
+       depends on USB_DWC3_HOST=y || USB_DWC3_DUAL_ROLE=y
+       default n
+       help
+         Select this when you want to enable USB3 LPM with dwc3 xhci host.
+
 endif

diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
index 32db328cc769f54c5a5649715461d978af92089c..dcb8ca08459892a3979a56c83addce299aef13c0 100644 (file)
--- a/drivers/usb/dwc3/host.c
+++ b/drivers/usb/dwc3/host.c
@@ -16,12 +16,14 @@
  */
 
 #include <linux/platform_device.h>
+#include <linux/usb/xhci_pdriver.h>
 
 #include "core.h"
 
 int dwc3_host_init(struct dwc3 *dwc)
 {
        struct platform_device  *xhci;
+       struct usb_xhci_pdata   pdata;
        int                     ret;
 
        xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
@@ -46,6 +48,18 @@ int dwc3_host_init(struct dwc3 *dwc)
                goto err1;
        }
 
+       memset(&pdata, 0, sizeof(pdata));
+
+#ifdef CONFIG_DWC3_HOST_USB3_LPM_ENABLE
+       pdata.usb3_lpm_capable = 1;
+#endif
+
+       ret = platform_device_add_data(xhci, &pdata, sizeof(pdata));
+       if (ret) {
+               dev_err(dwc->dev, "couldn't add platform data to xHCI device\n");
+               goto err1;
+       }
+
        ret = platform_device_add(xhci);
        if (ret) {
                dev_err(dwc->dev, "failed to register xHCI device\n");