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usb: dwc2: platform: add generic PHY framework support

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Get PHY parameters from devicetree and power off usb PHY during
system suspend.

Acked-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Yunzhi Li <lyz@rock-chips.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Yunzhi Li 2014-12-08 17:46:26 +08:00 committed by Felipe Balbi
parent 46919a23ee
commit 135b3c4304
2 changed files with 46 additions and 23 deletions
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33
drivers/usb/dwc2/gadget.c
View file

@ -3410,8 +3410,6 @@ int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq)
{
struct device *dev = hsotg->dev;
struct s3c_hsotg_plat *plat = dev->platform_data;
struct phy *phy;
struct usb_phy *uphy;
struct s3c_hsotg_ep *eps;
int epnum;
int ret;
@ -3421,30 +3419,23 @@ int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq)
hsotg->phyif = GUSBCFG_PHYIF16;
/*
* Attempt to find a generic PHY, then look for an old style
* USB PHY, finally fall back to pdata
* If platform probe couldn't find a generic PHY or an old style
* USB PHY, fall back to pdata
*/
phy = devm_phy_get(dev, "usb2-phy");
if (IS_ERR(phy)) {
uphy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
if (IS_ERR(uphy)) {
/* Fallback for pdata */
plat = dev_get_platdata(dev);
if (!plat) {
dev_err(dev,
"no platform data or transceiver defined\n");
return -EPROBE_DEFER;
}
hsotg->plat = plat;
} else
hsotg->uphy = uphy;
} else {
hsotg->phy = phy;
if (IS_ERR_OR_NULL(hsotg->phy) && IS_ERR_OR_NULL(hsotg->uphy)) {
plat = dev_get_platdata(dev);
if (!plat) {
dev_err(dev,
"no platform data or transceiver defined\n");
return -EPROBE_DEFER;
}
hsotg->plat = plat;
} else if (hsotg->phy) {
/*
* If using the generic PHY framework, check if the PHY bus
* width is 8-bit and set the phyif appropriately.
*/
if (phy_get_bus_width(phy) == 8)
if (phy_get_bus_width(hsotg->phy) == 8)
hsotg->phyif = GUSBCFG_PHYIF8;
}

36
drivers/usb/dwc2/platform.c
View file

@ -155,6 +155,8 @@ static int dwc2_driver_probe(struct platform_device *dev)
struct dwc2_core_params defparams;
struct dwc2_hsotg *hsotg;
struct resource *res;
struct phy *phy;
struct usb_phy *uphy;
int retval;
int irq;
@ -212,6 +214,24 @@ static int dwc2_driver_probe(struct platform_device *dev)
hsotg->dr_mode = of_usb_get_dr_mode(dev->dev.of_node);
/*
* Attempt to find a generic PHY, then look for an old style
* USB PHY
*/
phy = devm_phy_get(&dev->dev, "usb2-phy");
if (IS_ERR(phy)) {
hsotg->phy = NULL;
uphy = devm_usb_get_phy(&dev->dev, USB_PHY_TYPE_USB2);
if (IS_ERR(uphy))
hsotg->uphy = NULL;
else
hsotg->uphy = uphy;
} else {
hsotg->phy = phy;
phy_power_on(hsotg->phy);
phy_init(hsotg->phy);
}
spin_lock_init(&hsotg->lock);
mutex_init(&hsotg->init_mutex);
retval = dwc2_gadget_init(hsotg, irq);
@ -231,8 +251,15 @@ static int __maybe_unused dwc2_suspend(struct device *dev)
struct dwc2_hsotg *dwc2 = dev_get_drvdata(dev);
int ret = 0;
if (dwc2_is_device_mode(dwc2))
if (dwc2_is_device_mode(dwc2)) {
ret = s3c_hsotg_suspend(dwc2);
} else {
if (dwc2->lx_state == DWC2_L0)
return 0;
phy_exit(dwc2->phy);
phy_power_off(dwc2->phy);
}
return ret;
}
@ -241,8 +268,13 @@ static int __maybe_unused dwc2_resume(struct device *dev)
struct dwc2_hsotg *dwc2 = dev_get_drvdata(dev);
int ret = 0;
if (dwc2_is_device_mode(dwc2))
if (dwc2_is_device_mode(dwc2)) {
ret = s3c_hsotg_resume(dwc2);
} else {
phy_power_on(dwc2->phy);
phy_init(dwc2->phy);
}
return ret;
}