linux-kernel - [PATCH 3/3] usb: dwc3: Remove generic PHY calibrate() calls

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Date:   Thu, 27 Jun 2019 09:17:26 +0200
From:   Marek Szyprowski <m.szyprowski@...sung.com>
To:     linux-usb@...r.kernel.org, linux-samsung-soc@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Felipe Balbi <balbi@...nel.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Jochen Sprickerhof <jochen@...ickerhof.de>,
        Anand Moon <linux.amoon@...il.com>
Subject: [PATCH 3/3] usb: dwc3: Remove generic PHY calibrate() calls

Calls to USB2 generic PHY calibrate() method were added by commit
d8c80bb3b55b ("phy: exynos5-usbdrd: Calibrate LOS levels for
exynos5420/5800"), but it turned out that the mentioned patch worked only
by the pure luck and fixed only one use case. To fix the issues with PHY
calibration it has been moved to XHCI HCD driver, what allows to perform
calibration in the proper time window. This patch removes those calls
from DWC3 driver, as they are no longer needed there.

Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>
---
 drivers/usb/dwc3/core.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index baa029ceede9..f62e8442c614 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -168,7 +168,6 @@ static void __dwc3_set_mode(struct work_struct *work)
 				otg_set_vbus(dwc->usb2_phy->otg, true);
 			phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST);
 			phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST);
-			phy_calibrate(dwc->usb2_generic_phy);
 		}
 		break;
 	case DWC3_GCTL_PRTCAP_DEVICE:
@@ -1166,7 +1165,6 @@ static int dwc3_core_init_mode(struct dwc3 *dwc)
 				dev_err(dev, "failed to initialize host\n");
 			return ret;
 		}
-		phy_calibrate(dwc->usb2_generic_phy);
 		break;
 	case USB_DR_MODE_OTG:
 		INIT_WORK(&dwc->drd_work, __dwc3_set_mode);
-- 
2.17.1