[PATCH 04/14] usb: phy: nop: Handle power supply regulator for the PHY

Roger Quadros
2013-01-10T16:52:01Z

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>
---
drivers/usb/otg/nop-usb-xceiv.c | 18 ++++++++++++++++++
1 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/drivers/usb/otg/nop-usb-xceiv.c b/drivers/usb/otg/nop-usb-xceiv.c
index 163f972..1c6db10 100644
--- a/drivers/usb/otg/nop-usb-xceiv.c
+++ b/drivers/usb/otg/nop-usb-xceiv.c
@@ -33,11 +33,13 @@
#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 (nop->vcc) {
+ if (regulator_enable(nop->vcc))
+ dev_err(phy->dev, "Failed to enable power\n");
+ }
+
if (nop->clk)
clk_enable(nop->clk);

@@ -82,6 +89,11 @@ static void nop_shutdown(struct usb_phy *phy)

if (nop->clk)
clk_disable(nop->clk);
+
+ if (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)
@@ -157,6 +169,12 @@ 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\n");
+ nop->vcc = NULL;
+ }
+
nop->dev = &pdev->dev;
nop->phy.dev = nop->dev;
nop->phy.label = "nop-xceiv";
--
1.7.4.1