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: 12402519 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=-17.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,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=unavailable 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 C4B91C4338F for ; Tue, 27 Jul 2021 10:57:14 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8F53561989 for ; Tue, 27 Jul 2021 10:57:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 8F53561989 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=wMQeFlGOUabs40tgxeQDbufeqAA4PEkHtZGggPJQWic=; b=Of/uKiXPdMhzHy 3jaK5OjTRDctprFas1AO1uMMvT033IYj1FKYQDcasaYG8XjFfxop4AH+KqhO4tnO785A7Zau9FIF7 OassITwWPd93CEWtiXbekcf/TadFMQaK3ecday+dENH9/VzZIPBy7aszoMalqAnVoIAW5a7WnI0je 81D+YlLWbl/T4LXXI1Z3ZpUeBoIFEeGCMbs3WRJua3+clqBOij7HXDRk0d9mQlpo/vcbFh+38+3E4 pnypVwLfgOgXA4VQhxC37vNl8/oNSwhOEjVbtOkarJdCBvS7FMYCf3kTsYn+lrXmN5vHj8ivJ9ES1 8+qM8mjtJxnCJW+T0WjA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1m8KjJ-00EVN1-DI; Tue, 27 Jul 2021 10:54:33 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1m8Kj4-00EVKK-NS; Tue, 27 Jul 2021 10:54:20 +0000 X-UUID: 85fb98d2fc3e4d209ddeda57dfecc95b-20210727 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:Content-Type:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=iiJ9TlMy1Y3hIWltnCNZ1n1OG+Lm6SmtBMcv7Xs9hlE=; b=JaJJLVZul2qP11T0A0VL90GfKtAmYZT+kkn1jHOxVMWb8VgJk8BgvSAX7tSyffLsx95b1lK0kBj9qkYld19Lbxw1Q7C3FWfdi+ZHsJfkIbln8ak3w/SVZ1XpQcTBHAbrokutcqHTWdxiHAovJngnVOo+a0elVdoiM1g3TwSqdho=; X-UUID: 85fb98d2fc3e4d209ddeda57dfecc95b-20210727 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1250745340; Tue, 27 Jul 2021 03:54:10 -0700 Received: from MTKMBS06N2.mediatek.inc (172.21.101.130) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 27 Jul 2021 03:50:45 -0700 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210727_035418_817646_0FE031E5 X-CRM114-Status: GOOD ( 13.20 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.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);