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Subject[PATCH v4 05/11] drivers: usb: twl6030: Add dt support for twl6030 usb
Date
Add device tree support for twl6030 usb driver.
Update the Documentation with device tree binding information.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
.../devicetree/bindings/usb/twlxxxx-usb.txt | 22 +++++++++++
drivers/usb/otg/twl6030-usb.c | 39 +++++++++++++-------
2 files changed, 48 insertions(+), 13 deletions(-)
create mode 100644 Documentation/devicetree/bindings/usb/twlxxxx-usb.txt

diff --git a/Documentation/devicetree/bindings/usb/twlxxxx-usb.txt b/Documentation/devicetree/bindings/usb/twlxxxx-usb.txt
new file mode 100644
index 0000000..e3f6d73
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/twlxxxx-usb.txt
@@ -0,0 +1,22 @@
+USB COMPARATOR OF TWL CHIPS
+
+TWL6030 USB COMPARATOR
+ - compatible : Should be "ti,twl6030-usb"
+ - interrupts : Two interrupt numbers to the cpu should be specified. First
+ interrupt number is the otg interrupt number that raises ID interrupts when
+ the controller has to act as host and the second interrupt number is the
+ usb interrupt number that raises VBUS interrupts when the controller has to
+ act as device
+ - usb-supply : phandle to the regulator device tree node. It should be vusb
+ if it is twl6030 or ldousb if it is twl6025 subclass.
+
+twl6030-usb {
+ compatible = "ti,twl6030-usb";
+ interrupts = < 4 10 >;
+ regulator = "vusb";
+};
+
+Board specific device node entry
+&twl6030-usb {
+ usb-supply = <&vusb>;
+};
diff --git a/drivers/usb/otg/twl6030-usb.c b/drivers/usb/otg/twl6030-usb.c
index 9994dd22..6b0d0a1 100644
--- a/drivers/usb/otg/twl6030-usb.c
+++ b/drivers/usb/otg/twl6030-usb.c
@@ -105,7 +105,7 @@ struct twl6030_usb {
u8 asleep;
bool irq_enabled;
bool vbus_enable;
- unsigned long features;
+ const char *regulator;
};

#define comparator_to_twl(x) container_of((x), struct twl6030_usb, comparator)
@@ -153,13 +153,6 @@ static int twl6030_start_srp(struct phy_companion *comparator)

static int twl6030_usb_ldo_init(struct twl6030_usb *twl)
{
- char *regulator_name;
-
- if (twl->features & TWL6025_SUBCLASS)
- regulator_name = "ldousb";
- else
- regulator_name = "vusb";
-
/* Set to OTG_REV 1.3 and turn on the ID_WAKEUP_COMP */
twl6030_writeb(twl, TWL6030_MODULE_ID0 , 0x1, TWL6030_BACKUP_REG);

@@ -169,7 +162,7 @@ static int twl6030_usb_ldo_init(struct twl6030_usb *twl)
/* Program MISC2 register and set bit VUSB_IN_VBAT */
twl6030_writeb(twl, TWL6030_MODULE_ID0 , 0x10, TWL6030_MISC2);

- twl->usb3v3 = regulator_get(twl->dev, regulator_name);
+ twl->usb3v3 = regulator_get(twl->dev, twl->regulator);
if (IS_ERR(twl->usb3v3))
return -ENODEV;

@@ -321,9 +314,9 @@ static int __devinit twl6030_usb_probe(struct platform_device *pdev)
{
struct twl6030_usb *twl;
int status, err;
- struct twl4030_usb_data *pdata;
- struct device *dev = &pdev->dev;
- pdata = dev->platform_data;
+ struct device_node *np = pdev->dev.of_node;
+ struct device *dev = &pdev->dev;
+ struct twl4030_usb_data *pdata = dev->platform_data;

twl = devm_kzalloc(dev, sizeof *twl, GFP_KERNEL);
if (!twl)
@@ -332,13 +325,24 @@ static int __devinit twl6030_usb_probe(struct platform_device *pdev)
twl->dev = &pdev->dev;
twl->irq1 = platform_get_irq(pdev, 0);
twl->irq2 = platform_get_irq(pdev, 1);
- twl->features = pdata->features;
twl->linkstat = OMAP_MUSB_UNKNOWN;

twl->comparator.set_vbus = twl6030_set_vbus;
twl->comparator.start_srp = twl6030_start_srp;
omap_usb2_set_comparator(&twl->comparator);

+ if (np) {
+ twl->regulator = "usb";
+ } else if (pdata) {
+ if (pdata->features & TWL6025_SUBCLASS)
+ twl->regulator = "ldousb";
+ else
+ twl->regulator = "vusb";
+ } else {
+ dev_err(&pdev->dev, "twl6030 initialized without pdata\n");
+ return -EINVAL;
+ }
+
/* init spinlock for workqueue */
spin_lock_init(&twl->lock);

@@ -400,12 +404,21 @@ static int __exit twl6030_usb_remove(struct platform_device *pdev)
return 0;
}

+#ifdef CONFIG_OF
+static const struct of_device_id twl6030_usb_id_table[] = {
+ { .compatible = "ti,twl6030-usb" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, twl6030_usb_id_table);
+#endif
+
static struct platform_driver twl6030_usb_driver = {
.probe = twl6030_usb_probe,
.remove = __exit_p(twl6030_usb_remove),
.driver = {
.name = "twl6030_usb",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(twl6030_usb_id_table),
},
};

--
1.7.5.4


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