usb: phy: nop: Handle power supply regulator for the PHY
authorRoger Quadros <rogerq@ti.com>
Tue, 12 Mar 2013 11:24:22 +0000 (13:24 +0200)
committerFelipe Balbi <balbi@ti.com>
Mon, 18 Mar 2013 09:14:46 +0000 (11:14 +0200)
We use "vcc" as the supply name for the PHY's power supply.
The power supply will be enabled during .init() and disabled
during .shutdown()

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
drivers/usb/otg/nop-usb-xceiv.c

index 17c174f..fbdcfef 100644 (file)
 #include <linux/usb/nop-usb-xceiv.h>
 #include <linux/slab.h>
 #include <linux/clk.h>
+#include <linux/regulator/consumer.h>
 
 struct nop_usb_xceiv {
        struct usb_phy          phy;
        struct device           *dev;
        struct clk              *clk;
+       struct regulator        *vcc;
 };
 
 static struct platform_device *pd;
@@ -70,6 +72,11 @@ static int nop_init(struct usb_phy *phy)
 {
        struct nop_usb_xceiv *nop = dev_get_drvdata(phy->dev);
 
+       if (!IS_ERR(nop->vcc)) {
+               if (regulator_enable(nop->vcc))
+                       dev_err(phy->dev, "Failed to enable power\n");
+       }
+
        if (!IS_ERR(nop->clk))
                clk_enable(nop->clk);
 
@@ -82,6 +89,11 @@ static void nop_shutdown(struct usb_phy *phy)
 
        if (!IS_ERR(nop->clk))
                clk_disable(nop->clk);
+
+       if (!IS_ERR(nop->vcc)) {
+               if (regulator_disable(nop->vcc))
+                       dev_err(phy->dev, "Failed to disable power\n");
+       }
 }
 
 static int nop_set_peripheral(struct usb_otg *otg, struct usb_gadget *gadget)
@@ -154,6 +166,12 @@ static int nop_usb_xceiv_probe(struct platform_device *pdev)
                }
        }
 
+       nop->vcc = devm_regulator_get(&pdev->dev, "vcc");
+       if (IS_ERR(nop->vcc)) {
+               dev_dbg(&pdev->dev, "Error getting vcc regulator: %ld\n",
+                                       PTR_ERR(nop->vcc));
+       }
+
        nop->dev                = &pdev->dev;
        nop->phy.dev            = nop->dev;
        nop->phy.label          = "nop-xceiv";