public inbox for linux-mediatek@lists.infradead.org
 help / color / mirror / Atom feed
From: Chunfeng Yun <chunfeng.yun@mediatek.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Felipe Balbi <balbi@kernel.org>
Cc: Matthias Brugger <matthias.bgg@gmail.com>,
	Chunfeng Yun <chunfeng.yun@mediatek.com>,
	Thinh Nguyen <Thinh.Nguyen@synopsys.com>,
	<linux-usb@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-mediatek@lists.infradead.org>
Subject: [PATCH 2/3] usb: common: add helper to get role-switch-default-mode
Date: Tue, 25 May 2021 16:59:24 +0800	[thread overview]
Message-ID: <1621933165-9661-2-git-send-email-chunfeng.yun@mediatek.com> (raw)
In-Reply-To: <1621933165-9661-1-git-send-email-chunfeng.yun@mediatek.com>

Add helper to get "role-switch-default-mode", and convert it
to the corresponding enum usb_dr_mode

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
 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 */
-- 
2.18.0
_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek

  reply	other threads:[~2021-05-25  9:09 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-25  8:59 [PATCH 1/3] usb: common: move usb_get_dr_mode() kerneldoc next to its definition Chunfeng Yun
2021-05-25  8:59 ` Chunfeng Yun [this message]
2021-05-27  7:28   ` [PATCH 2/3] usb: common: add helper to get role-switch-default-mode Greg Kroah-Hartman
2021-05-27  9:43     ` Chunfeng Yun
2021-05-27 10:01       ` Greg Kroah-Hartman
2021-05-28  2:07         ` Chunfeng Yun
2021-05-25  8:59 ` [PATCH 3/3] usb: dwc3: drd: use " Chunfeng Yun
2021-05-27  7:29 ` [PATCH 1/3] usb: common: move usb_get_dr_mode() kerneldoc next to its definition Greg Kroah-Hartman

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1621933165-9661-2-git-send-email-chunfeng.yun@mediatek.com \
    --to=chunfeng.yun@mediatek.com \
    --cc=Thinh.Nguyen@synopsys.com \
    --cc=balbi@kernel.org \
    --cc=gregkh@linuxfoundation.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mediatek@lists.infradead.org \
    --cc=linux-usb@vger.kernel.org \
    --cc=matthias.bgg@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox