From patchwork Tue May 25 08:59:24 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?Q2h1bmZlbmcgWXVuICjkupHmmKXls7Ap?= X-Patchwork-Id: 447785 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 C916FC4707F for ; Tue, 25 May 2021 08:59:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A8DC76141B for ; Tue, 25 May 2021 08:59:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232137AbhEYJBI (ORCPT ); Tue, 25 May 2021 05:01:08 -0400 Received: from Mailgw01.mediatek.com ([1.203.163.78]:22024 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S232251AbhEYJBI (ORCPT ); Tue, 25 May 2021 05:01:08 -0400 X-UUID: 12e204deaa60458a880660ae7dbcd3de-20210525 X-UUID: 12e204deaa60458a880660ae7dbcd3de-20210525 Received: from mtkcas36.mediatek.inc [(172.27.4.253)] by mailgw01.mediatek.com (envelope-from ) (mailgw01.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1574218279; Tue, 25 May 2021 16:59:35 +0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by MTKMBS31N1.mediatek.inc (172.27.4.69) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 25 May 2021 16:59:29 +0800 Received: from localhost.localdomain (10.17.3.153) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 25 May 2021 16:59:28 +0800 From: Chunfeng Yun To: Greg Kroah-Hartman , Felipe Balbi CC: Matthias Brugger , Chunfeng Yun , Thinh Nguyen , , , , Subject: [PATCH 2/3] usb: common: add helper to get role-switch-default-mode Date: Tue, 25 May 2021 16:59:24 +0800 Message-ID: <1621933165-9661-2-git-send-email-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1621933165-9661-1-git-send-email-chunfeng.yun@mediatek.com> References: <1621933165-9661-1-git-send-email-chunfeng.yun@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: 8C0FE68DFA6589FCA3D9D34402D9CDF0EA656AD0BA301A1EC48A81BDD66D13B32000:8 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Add helper to get "role-switch-default-mode", and convert it to the corresponding enum usb_dr_mode Signed-off-by: Chunfeng Yun --- drivers/usb/common/common.c | 20 ++++++++++++++++++++ include/linux/usb/otg.h | 1 + 2 files changed, 21 insertions(+) diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c index fff318597337..78a625a4e526 100644 --- a/drivers/usb/common/common.c +++ b/drivers/usb/common/common.c @@ -207,6 +207,26 @@ enum usb_dr_mode usb_get_dr_mode(struct device *dev) } EXPORT_SYMBOL_GPL(usb_get_dr_mode); +/** + * usb_get_role_switch_default_mode - Get default mode for given device + * @dev: Pointer to the given device + * + * The function gets string from property 'role-switch-default-mode', + * and returns the corresponding enum usb_dr_mode. + */ +enum usb_dr_mode usb_get_role_switch_default_mode(struct device *dev) +{ + const char *str; + int ret; + + ret = device_property_read_string(dev, "role-switch-default-mode", &str); + if (ret < 0) + return USB_DR_MODE_UNKNOWN; + + return usb_get_dr_mode_from_string(str); +} +EXPORT_SYMBOL_GPL(usb_get_role_switch_default_mode); + /** * usb_decode_interval - Decode bInterval into the time expressed in 1us unit * @epd: The descriptor of the endpoint diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h index a86ee6aad51b..bde313c97fb6 100644 --- a/include/linux/usb/otg.h +++ b/include/linux/usb/otg.h @@ -121,5 +121,6 @@ enum usb_dr_mode { }; extern enum usb_dr_mode usb_get_dr_mode(struct device *dev); +extern enum usb_dr_mode usb_get_role_switch_default_mode(struct device *dev); #endif /* __LINUX_USB_OTG_H */