usb: dwc3: allow forcing a maximum speed
this is mainly for testing. In order to be able
to test if we're enumerating correctly on all
speeds, let that be controlled by a module
parameter.
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 717ebc9..ca3b01f 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -59,6 +59,10 @@
#include "debug.h"
+static char *maximum_speed = "super";
+module_param(maximum_speed, charp, 0);
+MODULE_PARM_DESC(maximum_speed, "Maximum supported speed.");
+
/**
* dwc3_core_soft_reset - Issues core soft reset and PHY reset
* @dwc: pointer to our context structure
@@ -370,6 +374,17 @@
dwc->dev = &pdev->dev;
dwc->irq = irq;
+ if (!strncmp("super", maximum_speed, 5))
+ dwc->maximum_speed = DWC3_DCFG_SUPERSPEED;
+ else if (!strncmp("high", maximum_speed, 4))
+ dwc->maximum_speed = DWC3_DCFG_HIGHSPEED;
+ else if (!strncmp("full", maximum_speed, 4))
+ dwc->maximum_speed = DWC3_DCFG_FULLSPEED1;
+ else if (!strncmp("low", maximum_speed, 3))
+ dwc->maximum_speed = DWC3_DCFG_LOWSPEED;
+ else
+ dwc->maximum_speed = DWC3_DCFG_SUPERSPEED;
+
pm_runtime_enable(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
pm_runtime_forbid(&pdev->dev);