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Tue, 25 May 2021 02:09:37 -0700 Received: from MTKMBS31N1.mediatek.inc (172.27.4.69) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 25 May 2021 01:59:35 -0700 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210525_020946_097277_5CE41C2F X-CRM114-Status: GOOD ( 13.54 ) 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 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 */