The dwc2 USB controller in Stratix10 has an additional ECC reset bit that
needs to get de-asserted in order for the controller to work properly.
Signed-off-by: Dinh Nguyen <dingu...@kernel.org>
---
drivers/usb/dwc2/core.h | 1 +
drivers/usb/dwc2/platform.c | 10 ++++++++++
2 files changed, 11 insertions(+)
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index 8367d4f9..a4b5f4e 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -920,6 +920,7 @@ struct dwc2_hsotg {
int irq;
struct clk *clk;
struct reset_control *reset;
+ struct reset_control *reset_ecc;
unsigned int queuing_high_bandwidth:1;
unsigned int srp_success:1;
diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
index daf0d37..d466e03 100644
--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c
@@ -220,6 +220,15 @@ static int dwc2_lowlevel_hw_init(struct dwc2_hsotg *hsotg)
reset_control_deassert(hsotg->reset);
+ hsotg->reset_ecc = devm_reset_control_get_optional(hsotg->dev,
"dwc2-ecc");
+ if (IS_ERR(hsotg->reset_ecc)) {
+ ret = PTR_ERR(hsotg->reset_ecc);
+ dev_err(hsotg->dev, "error getting reset control for ecc %d\n",
ret);
+ return ret;
+ }
+
+ reset_control_deassert(hsotg->reset_ecc);
+
/* Set default UTMI width */
hsotg->phyif = GUSBCFG_PHYIF16;
@@ -318,6 +327,7 @@ static int dwc2_driver_remove(struct platform_device *dev)
dwc2_lowlevel_hw_disable(hsotg);
reset_control_assert(hsotg->reset);
+ reset_control_assert(hsotg->reset_ecc);
return 0;
}
--
2.7.4
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