[v3,1/9] usb: cdns3: introduce cdns3_set_phy_power API

Commit Message

Peter Chen June 8, 2020, 7:10 a.m. UTC

Since we have both USB2 and USB3 PHYs for cdns3 controller, it is
better we have a unity API to handle both USB2 and USB3's power, it
could simplify code for error handling and further power management
implementation.

Reviewed-by: Jun Li <[e-mail]>
Signed-off-by: Peter Chen <[e-mail]>
---
 drivers/usb/cdns3/core.c | 44 ++++++++++++++++++++++++++--------------
 1 file changed, 29 insertions(+), 15 deletions(-)

Patch

diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c
index 19bbb5b7e6b6..bfd09aa98c12 100644
--- a/drivers/usb/cdns3/core.c
+++ b/drivers/usb/cdns3/core.c
@@ -384,6 +384,28 @@  static int cdns3_role_set(struct usb_role_switch *sw, enum usb_role role)
 	return ret;
 }
 
+static int cdns3_set_phy_power(struct cdns3 *cdns, bool on)
+{
+	int ret = 0;
+
+	if (on) {
+		ret = phy_power_on(cdns->usb2_phy);
+		if (ret)
+			return ret;
+
+		ret = phy_power_on(cdns->usb3_phy);
+		if (ret) {
+			phy_power_off(cdns->usb2_phy);
+			return ret;
+		}
+	} else {
+		phy_power_off(cdns->usb3_phy);
+		phy_power_off(cdns->usb2_phy);
+	}
+
+	return 0;
+}
+
 /**
  * cdns3_probe - probe for cdns3 core device
  * @pdev: Pointer to cdns3 core platform device
@@ -477,14 +499,10 @@  static int cdns3_probe(struct platform_device *pdev)
 	if (ret)
 		goto err1;
 
-	ret = phy_power_on(cdns->usb2_phy);
+	ret = cdns3_set_phy_power(cdns, true);
 	if (ret)
 		goto err2;
 
-	ret = phy_power_on(cdns->usb3_phy);
-	if (ret)
-		goto err3;
-
 	sw_desc.set = cdns3_role_set;
 	sw_desc.get = cdns3_role_get;
 	sw_desc.allow_userspace_control = true;
@@ -496,16 +514,16 @@  static int cdns3_probe(struct platform_device *pdev)
 	if (IS_ERR(cdns->role_sw)) {
 		ret = PTR_ERR(cdns->role_sw);
 		dev_warn(dev, "Unable to register Role Switch\n");
-		goto err4;
+		goto err3;
 	}
 
 	ret = cdns3_drd_init(cdns);
 	if (ret)
-		goto err5;
+		goto err4;
 
 	ret = cdns3_core_init_role(cdns);
 	if (ret)
-		goto err5;
+		goto err4;
 
 	device_set_wakeup_capable(dev, true);
 	pm_runtime_set_active(dev);
@@ -522,14 +540,11 @@  static int cdns3_probe(struct platform_device *pdev)
 	dev_dbg(dev, "Cadence USB3 core: probe succeed\n");
 
 	return 0;
-err5:
+err4:
 	cdns3_drd_exit(cdns);
 	usb_role_switch_unregister(cdns->role_sw);
-err4:
-	phy_power_off(cdns->usb3_phy);
-
 err3:
-	phy_power_off(cdns->usb2_phy);
+	cdns3_set_phy_power(cdns, false);
 err2:
 	phy_exit(cdns->usb3_phy);
 err1:
@@ -553,8 +568,7 @@  static int cdns3_remove(struct platform_device *pdev)
 	pm_runtime_put_noidle(&pdev->dev);
 	cdns3_exit_roles(cdns);
 	usb_role_switch_unregister(cdns->role_sw);
-	phy_power_off(cdns->usb2_phy);
-	phy_power_off(cdns->usb3_phy);
+	cdns3_set_phy_power(cdns, false);
 	phy_exit(cdns->usb2_phy);
 	phy_exit(cdns->usb3_phy);
 	return 0;