From: Pratyush Anand <pratyush.anand@xxxxxx>
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@xxxxxx>
Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
---
drivers/usb/dwc3/Kconfig | 7 +++++++
drivers/usb/dwc3/host.c | 14 ++++++++++++++
2 files changed, 21 insertions(+)
diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig
index 8eb996e..75a8af4 100644
--- a/drivers/usb/dwc3/Kconfig
+++ b/drivers/usb/dwc3/Kconfig
@@ -92,4 +92,11 @@ 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 32db328..dcb8ca0 100644
--- 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");
--
1.8.3.2
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