From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754803AbdKAPfC (ORCPT ); Wed, 1 Nov 2017 11:35:02 -0400 Received: from mail.kernel.org ([198.145.29.99]:59872 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751738AbdKAPfA (ORCPT ); Wed, 1 Nov 2017 11:35:00 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org F00FD218AC Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dinguyen@kernel.org From: Dinh Nguyen To: johnyoun@synopsys.com Cc: dinguyen@kernel.org, felipe.balbi@linux.intel.com, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] usb: dwc2: add optional usb ecc reset bit Date: Wed, 1 Nov 2017 10:34:53 -0500 Message-Id: <1509550493-1924-1-git-send-email-dinguyen@kernel.org> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- 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