From: Chunfeng Yun <chunfeng.yun@mediatek.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Rob Herring <robh+dt@kernel.org>, Felipe Balbi <balbi@kernel.org>
Cc: Chunfeng Yun <chunfeng.yun@mediatek.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
Thinh Nguyen <Thinh.Nguyen@synopsys.com>,
<linux-usb@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mediatek@lists.infradead.org>,
<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: [PATCH v2 05/13] usb: common: add helper to get role-switch-default-mode
Date: Fri, 18 Jun 2021 17:29:10 +0800 [thread overview]
Message-ID: <1624008558-16949-6-git-send-email-chunfeng.yun@mediatek.com> (raw)
In-Reply-To: <1624008558-16949-1-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>
---
v2: no changes
---
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 347fb3d3894a..c9bdeb4ddcb5 100644
--- a/drivers/usb/common/common.c
+++ b/drivers/usb/common/common.c
@@ -200,6 +200,26 @@ 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 69f1b6328532..1550b8e5f039 100644
--- a/include/linux/usb/otg.h
+++ b/include/linux/usb/otg.h
@@ -128,5 +128,6 @@ enum usb_dr_mode {
* and returns the correspondig 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
next prev parent reply other threads:[~2021-06-18 9:30 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-18 9:29 [PATCH v2 00/13] Add support mtu3 gadget (runtime) PM Chunfeng Yun
2021-06-18 9:29 ` [PATCH v2 01/13] dt-bindings: usb: mtu3: remove support VBUS detection of extcon Chunfeng Yun
2021-07-12 19:07 ` Rob Herring
2021-06-18 9:29 ` [PATCH v2 02/13] dt-bindings: usb: mtu3: add optional property to disable usb2 ports Chunfeng Yun
2021-07-12 19:08 ` Rob Herring
2021-07-13 9:00 ` Chunfeng Yun
2021-06-18 9:29 ` [PATCH v2 03/13] dt-bindings: usb: mtu3: add support property role-switch-default-mode Chunfeng Yun
2021-07-12 19:08 ` Rob Herring
2021-06-18 9:29 ` [PATCH v2 04/13] dt-bindings: usb: mtu3: add wakeup interrupt Chunfeng Yun
2021-07-12 19:09 ` Rob Herring
2021-06-18 9:29 ` Chunfeng Yun [this message]
2021-06-18 9:29 ` [PATCH v2 06/13] usb: dwc3: drd: use helper to get role-switch-default-mode Chunfeng Yun
2021-06-18 9:29 ` [PATCH v2 07/13] usb: mtu3: support property role-switch-default-mode Chunfeng Yun
2021-06-18 9:29 ` [PATCH v2 08/13] usb: mtu3: support option to disable usb2 ports Chunfeng Yun
2021-06-18 9:29 ` [PATCH v2 09/13] usb: mtu3: add new helpers for host suspend/resume Chunfeng Yun
2021-06-18 9:29 ` [PATCH v2 10/13] usb: mtu3: support runtime PM for host mode Chunfeng Yun
2021-06-18 9:29 ` [PATCH v2 11/13] usb: mtu3: add helper to power on/down device Chunfeng Yun
2021-06-18 9:29 ` [PATCH v2 12/13] usb: mtu3: support suspend/resume for device mode Chunfeng Yun
2021-06-18 9:29 ` [PATCH v2 13/13] usb: mtu3: support suspend/resume for dual-role mode Chunfeng Yun
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