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From: Heikki Krogerus <heikki.krogerus@linux.intel.com>
To: "Rafael J. Wysocki" <rafael@kernel.org>,
	Andy Shevchenko <andy@infradead.org>,
	Hans de Goede <hdegoede@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Darren Hart <dvhart@infradead.org>,
	linux-kernel@vger.kernel.org
Subject: [PATCH v2 2/3] usb: roles: intel_xhci: Supplying software node for the role mux
Date: Fri, 16 Aug 2019 13:45:14 +0300
Message-ID: <20190816104515.63613-3-heikki.krogerus@linux.intel.com> (raw)
In-Reply-To: <20190816104515.63613-1-heikki.krogerus@linux.intel.com>

The primary purpose for this node will be to allow linking
the users of the switch to it. The users will be for example
USB Type-C connectors. By supplying a reference to this
node in the software nodes representing the USB Type-C
controllers or connectors, the drivers for those devices can
access the switch.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
---
 .../usb/roles/intel-xhci-usb-role-switch.c    | 23 ++++++++++++++-----
 1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/drivers/usb/roles/intel-xhci-usb-role-switch.c b/drivers/usb/roles/intel-xhci-usb-role-switch.c
index 277de96181f9..2b1fe2700915 100644
--- a/drivers/usb/roles/intel-xhci-usb-role-switch.c
+++ b/drivers/usb/roles/intel-xhci-usb-role-switch.c
@@ -39,6 +39,10 @@ struct intel_xhci_usb_data {
 	void __iomem *base;
 };
 
+static const struct software_node intel_xhci_usb_node = {
+	"intel-xhci-usb-sw",
+};
+
 static int intel_xhci_usb_set_role(struct device *dev, enum usb_role role)
 {
 	struct intel_xhci_usb_data *data = dev_get_drvdata(dev);
@@ -122,17 +126,13 @@ static enum usb_role intel_xhci_usb_get_role(struct device *dev)
 	return role;
 }
 
-static const struct usb_role_switch_desc sw_desc = {
-	.set = intel_xhci_usb_set_role,
-	.get = intel_xhci_usb_get_role,
-	.allow_userspace_control = true,
-};
-
 static int intel_xhci_usb_probe(struct platform_device *pdev)
 {
+	struct usb_role_switch_desc sw_desc = { };
 	struct device *dev = &pdev->dev;
 	struct intel_xhci_usb_data *data;
 	struct resource *res;
+	int ret;
 
 	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
 	if (!data)
@@ -147,6 +147,15 @@ static int intel_xhci_usb_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, data);
 
+	ret = software_node_register(&intel_xhci_usb_node);
+	if (ret)
+		return ret;
+
+	sw_desc.set = intel_xhci_usb_set_role,
+	sw_desc.get = intel_xhci_usb_get_role,
+	sw_desc.allow_userspace_control = true,
+	sw_desc.fwnode = software_node_fwnode(&intel_xhci_usb_node);
+
 	data->role_sw = usb_role_switch_register(dev, &sw_desc);
 	if (IS_ERR(data->role_sw))
 		return PTR_ERR(data->role_sw);
@@ -164,6 +173,8 @@ static int intel_xhci_usb_remove(struct platform_device *pdev)
 	pm_runtime_disable(&pdev->dev);
 
 	usb_role_switch_unregister(data->role_sw);
+	fwnode_handle_put(software_node_fwnode(&intel_xhci_usb_node));
+
 	return 0;
 }
 
-- 
2.23.0.rc1


  parent reply index

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-16 10:45 [PATCH v2 0/3] software node: Introduce software_node_find_by_name() Heikki Krogerus
2019-08-16 10:45 ` [PATCH v2 1/3] software node: Add software_node_find_by_name() Heikki Krogerus
2019-08-16 13:42   ` Andy Shevchenko
2019-08-16 10:45 ` Heikki Krogerus [this message]
2019-08-16 13:45   ` [PATCH v2 2/3] usb: roles: intel_xhci: Supplying software node for the role mux Andy Shevchenko
2019-08-16 13:52     ` Heikki Krogerus
2019-08-16 19:43       ` Hans de Goede
2019-08-16 10:45 ` [PATCH v2 3/3] platform/x86: intel_cht_int33fe: Use new API to gain access to the role switch Heikki Krogerus

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