From patchwork Thu Jul 20 17:36:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sebastian Reichel X-Patchwork-Id: 13320930 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 91A8FC04FDF for ; Thu, 20 Jul 2023 17:36:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231669AbjGTRgw (ORCPT ); Thu, 20 Jul 2023 13:36:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36394 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231136AbjGTRgu (ORCPT ); Thu, 20 Jul 2023 13:36:50 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8B1241BB; Thu, 20 Jul 2023 10:36:48 -0700 (PDT) Received: from jupiter.universe (dyndsl-091-248-215-153.ewe-ip-backbone.de [91.248.215.153]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: sre) by madras.collabora.co.uk (Postfix) with ESMTPSA id DC7C2660708B; Thu, 20 Jul 2023 18:36:46 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1689874607; bh=x+aSJIr60rE8FgDa2xnKptMGufUUikneuDiI3dxwTPA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=n4AMs+zAwaq0pUK8X1771cErKK7Qn8Pa9yTCbLyI0ahf6aUsHLwUrPLhfOWk59Ypq Q7jkTCqIBDbKloXHLAvwxoWWBuUB9JFhH7/zA6hArPArEYUrIRf6tizPUzIutUvts3 jSoKyDs5y47jDLb2BtEwGez4Hq6G4uzu/889EX1KJ2XUV63ngj/3XImThTd2Nn3k6J G/FYbqL880cbWlUJzH100qujbo+vSVNRZfNI1HPgYu22ya3hb6hKYz6p7JurCGTVVw CCER8yzSjeifkdKyMGqgFvQ0rUAYbyLH/azEyx3MNnTu6NH78JBmhEfj7zmx97KG3w s+i3j0h6psbnA== Received: by jupiter.universe (Postfix, from userid 1000) id E76EA480E65; Thu, 20 Jul 2023 19:36:44 +0200 (CEST) From: Sebastian Reichel To: Heiko Stuebner , Greg Kroah-Hartman Cc: Thinh Nguyen , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-rockchip@lists.infradead.org, linux-usb@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Sebastian Reichel , kernel@collabora.com Subject: [PATCH v2 2/3] usb: dwc3: add optional PHY interface clocks Date: Thu, 20 Jul 2023 19:36:42 +0200 Message-Id: <20230720173643.69553-3-sebastian.reichel@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230720173643.69553-1-sebastian.reichel@collabora.com> References: <20230720173643.69553-1-sebastian.reichel@collabora.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org On Rockchip RK3588 one of the DWC3 cores is integrated weirdly and requires two extra clocks to be enabled. Without these extra clocks hot-plugging USB devices is broken. Signed-off-by: Sebastian Reichel --- drivers/usb/dwc3/core.c | 26 ++++++++++++++++++++++++++ drivers/usb/dwc3/core.h | 4 ++++ 2 files changed, 30 insertions(+) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index f6689b731718..0618fcc4d0af 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -817,8 +817,20 @@ static int dwc3_clk_enable(struct dwc3 *dwc) if (ret) goto disable_ref_clk; + ret = clk_prepare_enable(dwc->utmi_clk); + if (ret) + goto disable_susp_clk; + + ret = clk_prepare_enable(dwc->pipe_clk); + if (ret) + goto disable_utmi_clk; + return 0; +disable_utmi_clk: + clk_disable_unprepare(dwc->utmi_clk); +disable_susp_clk: + clk_disable_unprepare(dwc->susp_clk); disable_ref_clk: clk_disable_unprepare(dwc->ref_clk); disable_bus_clk: @@ -828,6 +840,8 @@ static int dwc3_clk_enable(struct dwc3 *dwc) static void dwc3_clk_disable(struct dwc3 *dwc) { + clk_disable_unprepare(dwc->pipe_clk); + clk_disable_unprepare(dwc->utmi_clk); clk_disable_unprepare(dwc->susp_clk); clk_disable_unprepare(dwc->ref_clk); clk_disable_unprepare(dwc->bus_clk); @@ -1764,6 +1778,18 @@ static int dwc3_get_clocks(struct dwc3 *dwc) } } + dwc->utmi_clk = devm_clk_get_optional(dev, "utmi"); + if (IS_ERR(dwc->utmi_clk)) { + return dev_err_probe(dev, PTR_ERR(dwc->utmi_clk), + "could not get utmi clock\n"); + } + + dwc->pipe_clk = devm_clk_get_optional(dev, "pipe"); + if (IS_ERR(dwc->pipe_clk)) { + return dev_err_probe(dev, PTR_ERR(dwc->pipe_clk), + "could not get pipe clock\n"); + } + return 0; } diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 8b1295e4dcdd..fa49a87025cf 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -994,6 +994,8 @@ struct dwc3_scratchpad_array { * @bus_clk: clock for accessing the registers * @ref_clk: reference clock * @susp_clk: clock used when the SS phy is in low power (S3) state + * @utmi_clk: clock used for USB2 PHY communication + * @pipe_clk: clock used for USB3 PHY communication * @reset: reset control * @regs: base address for our registers * @regs_size: address space size @@ -1159,6 +1161,8 @@ struct dwc3 { struct clk *bus_clk; struct clk *ref_clk; struct clk *susp_clk; + struct clk *utmi_clk; + struct clk *pipe_clk; struct reset_control *reset;