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usb: dwc2: add optional usb ecc reset bit 

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.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Dinh Nguyen 2017-11-01 10:34:53 -05:00 committed by Felipe Balbi
parent 5785e87a3d
commit f2830ad455
2 changed files with 11 additions and 0 deletions
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1
drivers/usb/dwc2/core.h
View File

@ -925,6 +925,7 @@ 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;

10
drivers/usb/dwc2/platform.c
View File

@ -221,6 +221,15 @@ 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;
@ -319,6 +328,7 @@ 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;
}