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Message-Id: <1418031988-2700-4-git-send-email-lyz@rock-chips.com>
Date: Mon, 8 Dec 2014 17:46:26 +0800
From: Yunzhi Li <lyz@...k-chips.com>
To: heiko@...ech.de, dianders@...omium.org, romain.perier@...il.com
Cc: olof@...om.net, huangtao@...k-chips.com, zyw@...k-chips.com,
cf@...k-chips.com, linux-rockchip@...ts.infradead.org,
Yunzhi Li <lyz@...k-chips.com>,
Paul Zimmerman <paulz@...opsys.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3 3/5] usb: dwc2: add generic PHY framework support for dwc2 usb controler platform driver.
Get PHY parameters from devicetree and power off usb PHY during
system suspend.
Signed-off-by: Yunzhi Li <lyz@...k-chips.com>
---
Changes in v3:
- Fix coding style: both branches of the if() which only one
branch of the conditional statement is a single statement should
have braces.
- No need to test dwc2->phy for NULL before calling generic phy
APIs.
drivers/usb/dwc2/gadget.c | 33 ++++++++++++---------------------
drivers/usb/dwc2/platform.c | 36 ++++++++++++++++++++++++++++++++++--
2 files changed, 46 insertions(+), 23 deletions(-)
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 200168e..2601c61 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -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;
}
diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
index 6a795aa..ae095f0 100644
--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c
@@ -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;
}
--
2.0.0
--
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