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[2620:137:e000::1:20]) by mx.google.com with ESMTP id n15-20020a170902d2cf00b001a2445dd0fasi14895343plc.381.2023.04.18.04.32.58; Tue, 18 Apr 2023 04:33:14 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@sberdevices.ru header.s=mail header.b=brqLeNnH; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=sberdevices.ru Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231428AbjDRLSZ (ORCPT + 99 others); Tue, 18 Apr 2023 07:18:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59732 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231302AbjDRLSX (ORCPT ); Tue, 18 Apr 2023 07:18:23 -0400 Received: from mx.sberdevices.ru (mx.sberdevices.ru [45.89.227.171]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8896619AA; Tue, 18 Apr 2023 04:17:36 -0700 (PDT) Received: from s-lin-edge02.sberdevices.ru (localhost [127.0.0.1]) by mx.sberdevices.ru (Postfix) with ESMTP id F24565FD78; Tue, 18 Apr 2023 14:16:20 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sberdevices.ru; s=mail; t=1681816581; bh=MDzMe5CZfB1jJP7T11BEyo9k6M0Db32prO+SmusTuWw=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type; b=brqLeNnHFhrcMVFs0R8yx2+7mwYyq+eOWHy5gKsQDSSPFOT7vG87eoE21J0MCPUtj /ZDLMSEpazMaB90uVs0YZdxxHZ7tOmH1cTT114+/ioSqRj/FsNG0Sp6dXxdFAaa1OX rKSIS8T9C8d5kkEeelMcSH88IvZqE4VcFgSF9189TzLEDVJ49KX/mNmRM7CNd7BN4s z/Qv7rzi2lLNjo+HKfZ4RDa7QP25N+bNu+y5IyVdZcn9ztNZXrPxytrGFO3+Vj+p6H G8OSARnLw0zTmHuJdvWWGWSFpibgD/h+oSUZaKgWAADMczYKrHxgbQgkD6xSvatfc7 UTNN778qGqelw== Received: from S-MS-EXCH01.sberdevices.ru (S-MS-EXCH01.sberdevices.ru [172.16.1.4]) by mx.sberdevices.ru (Postfix) with ESMTP; Tue, 18 Apr 2023 14:16:20 +0300 (MSK) From: Dmitry Rokosov To: , , , , , , , , , , , CC: , , , , , , , , , , Dmitry Rokosov Subject: [PATCH v2 1/5] phy: amlogic: enable/disable clkin during Amlogic USB PHY init/exit Date: Tue, 18 Apr 2023 14:16:08 +0300 Message-ID: <20230418111612.19479-2-ddrokosov@sberdevices.ru> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20230418111612.19479-1-ddrokosov@sberdevices.ru> References: <20230418111612.19479-1-ddrokosov@sberdevices.ru> MIME-Version: 1.0 X-Originating-IP: [172.16.1.6] X-ClientProxiedBy: S-MS-EXCH01.sberdevices.ru (172.16.1.4) To S-MS-EXCH01.sberdevices.ru (172.16.1.4) X-KSMG-Rule-ID: 4 X-KSMG-Message-Action: clean X-KSMG-AntiSpam-Status: not scanned, disabled by settings X-KSMG-AntiSpam-Interceptor-Info: not scanned X-KSMG-AntiPhishing: not scanned, disabled by settings X-KSMG-AntiVirus: Kaspersky Secure Mail Gateway, version 1.1.2.30, bases: 2023/04/18 05:44:00 #21123121 X-KSMG-AntiVirus-Status: Clean, skipped X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS, T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1763513565299784783?= X-GMAIL-MSGID: =?utf-8?q?1763513565299784783?= Previously, all Amlogic boards used the XTAL clock as the default board clock for the USB PHY input, so there was no need to enable it. However, with the introduction of new Amlogic SoCs like the A1 family, the USB PHY now uses a gated clock. Hence, it is necessary to enable this gated clock during the PHY initialization sequence, or disable it during the PHY exit, as appropriate. Signed-off-by: Dmitry Rokosov Reviewed-by: Neil Armstrong --- drivers/phy/amlogic/phy-meson-g12a-usb2.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/phy/amlogic/phy-meson-g12a-usb2.c b/drivers/phy/amlogic/phy-meson-g12a-usb2.c index 9d1efa0d9394..80938751da4f 100644 --- a/drivers/phy/amlogic/phy-meson-g12a-usb2.c +++ b/drivers/phy/amlogic/phy-meson-g12a-usb2.c @@ -172,10 +172,16 @@ static int phy_meson_g12a_usb2_init(struct phy *phy) int ret; unsigned int value; - ret = reset_control_reset(priv->reset); + ret = clk_prepare_enable(priv->clk); if (ret) return ret; + ret = reset_control_reset(priv->reset); + if (ret) { + clk_disable_unprepare(priv->clk); + return ret; + } + udelay(RESET_COMPLETE_TIME); /* usb2_otg_aca_en == 0 */ @@ -277,8 +283,11 @@ static int phy_meson_g12a_usb2_init(struct phy *phy) static int phy_meson_g12a_usb2_exit(struct phy *phy) { struct phy_meson_g12a_usb2_priv *priv = phy_get_drvdata(phy); + int ret = reset_control_reset(priv->reset); + + clk_disable_unprepare(priv->clk); - return reset_control_reset(priv->reset); + return ret; } /* set_mode is not needed, mode setting is handled via the UTMI bus */