From patchwork Tue Jul 27 10:50:12 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Macpaul Lin X-Patchwork-Id: 12402449 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 23552C4338F for ; Tue, 27 Jul 2021 10:50:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0B4CF61378 for ; Tue, 27 Jul 2021 10:50:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236417AbhG0Kuu (ORCPT ); Tue, 27 Jul 2021 06:50:50 -0400 Received: from mailgw01.mediatek.com ([60.244.123.138]:52686 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S236293AbhG0Kuu (ORCPT ); Tue, 27 Jul 2021 06:50:50 -0400 X-UUID: cbe704db5b144178a1a6b3101c4e9843-20210727 X-UUID: cbe704db5b144178a1a6b3101c4e9843-20210727 Received: from mtkcas07.mediatek.inc [(172.21.101.84)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1000917277; Tue, 27 Jul 2021 18:50:45 +0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkmbs06n2.mediatek.inc (172.21.101.130) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 27 Jul 2021 18:50:44 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 27 Jul 2021 18:50:44 +0800 From: Macpaul Lin To: , Chunfeng Yun , Kishon Vijay Abraham I , Vinod Koul , Matthias Brugger CC: Ainge Hsu , Eddie Hung , Kuohong Wang , Mediatek WSD Upstream , Macpaul Lin , Macpaul Lin , , , , Subject: [PATCH 1/2] phy: introduce phy mode PHY_MODE_UART and phy_get_mode_ext() Date: Tue, 27 Jul 2021 18:50:12 +0800 Message-ID: <1627383013-4535-1-git-send-email-macpaul.lin@mediatek.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Some embedded platform shared PINs between USB and UART. For example, some phone will use special cable detection in boot loader to switch USB port function into UART mode. Hence Kernel need to query the hardware state from PHY registers to confirm the initialzation flow for PHY and USB driver. To support this kind of PIN switch, new PHY MODE and query API is required. Here we introduce a new PHY mode: PHY_MODE_UART. API phy_get_mode_ext() can be used to query the MODE from hardware instead of reading it from phy attributes. Signed-off-by: Macpaul Lin --- drivers/phy/phy-core.c | 17 +++++++++++++++++ include/linux/phy/phy.h | 3 +++ 2 files changed, 20 insertions(+) diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c index ccb575b..b8f6539 100644 --- a/drivers/phy/phy-core.c +++ b/drivers/phy/phy-core.c @@ -373,6 +373,23 @@ int phy_set_mode_ext(struct phy *phy, enum phy_mode mode, int submode) } EXPORT_SYMBOL_GPL(phy_set_mode_ext); +int phy_get_mode_ext(struct phy *phy) +{ + int ret; + + if (!phy || !phy->ops->get_mode_ext) + return 0; + + mutex_lock(&phy->mutex); + ret = phy->ops->get_mode_ext(phy); + if (!ret) + ret = phy->attrs.mode; + mutex_unlock(&phy->mutex); + + return ret; +} +EXPORT_SYMBOL_GPL(phy_get_mode_ext); + int phy_set_media(struct phy *phy, enum phy_media media) { int ret; diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h index 0ed434d..7d32c6b 100644 --- a/include/linux/phy/phy.h +++ b/include/linux/phy/phy.h @@ -34,6 +34,7 @@ enum phy_mode { PHY_MODE_USB_DEVICE_HS, PHY_MODE_USB_DEVICE_SS, PHY_MODE_USB_OTG, + PHY_MODE_UART, PHY_MODE_UFS_HS_A, PHY_MODE_UFS_HS_B, PHY_MODE_PCIE, @@ -70,6 +71,7 @@ enum phy_media { * @power_on: powering on the phy * @power_off: powering off the phy * @set_mode: set the mode of the phy + * @get_mode_ext: get the extented mode of the phy * @set_media: set the media type of the phy (optional) * @set_speed: set the speed of the phy (optional) * @reset: resetting the phy @@ -83,6 +85,7 @@ struct phy_ops { int (*power_on)(struct phy *phy); int (*power_off)(struct phy *phy); int (*set_mode)(struct phy *phy, enum phy_mode mode, int submode); + int (*get_mode_ext)(struct phy *phy); int (*set_media)(struct phy *phy, enum phy_media media); int (*set_speed)(struct phy *phy, int speed);