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usb: misc: usb3503: Factor out I2C probe 

In preparation for supporting operation without an I2C control interface
factor out the I2C-specific parts of the probe routine from those that
don't do any register I/O.

Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Mark Brown 2013-08-09 11:41:53 +01:00 committed by Greg Kroah-Hartman
parent 68b14134be
commit 2487e3ee33
1 changed files with 43 additions and 34 deletions
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77
drivers/usb/misc/usb3503.c
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@ -156,31 +156,16 @@ static const struct regmap_config usb3503_regmap_config = {
.max_register = USB3503_RESET,
};
static int usb3503_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
static int usb3503_probe(struct usb3503 *hub)
{
struct usb3503_platform_data *pdata = dev_get_platdata(&i2c->dev);
struct device_node *np = i2c->dev.of_node;
struct usb3503 *hub;
int err = -ENOMEM;
struct device *dev = hub->dev;
struct usb3503_platform_data *pdata = dev_get_platdata(dev);
struct device_node *np = dev->of_node;
int err;
u32 mode = USB3503_MODE_UNKNOWN;
const u32 *property;
int len;
hub = devm_kzalloc(&i2c->dev, sizeof(struct usb3503), GFP_KERNEL);
if (!hub) {
dev_err(&i2c->dev, "private data alloc fail\n");
return err;
}
i2c_set_clientdata(i2c, hub);
hub->regmap = devm_regmap_init_i2c(i2c, &usb3503_regmap_config);
if (IS_ERR(hub->regmap)) {
err = PTR_ERR(hub->regmap);
dev_err(&i2c->dev, "Failed to initialise regmap: %d\n", err);
return err;
}
hub->dev = &i2c->dev;
if (pdata) {
hub->port_off_mask = pdata->port_off_mask;
hub->gpio_intn = pdata->gpio_intn;
@ -214,46 +199,70 @@ static int usb3503_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
}
if (gpio_is_valid(hub->gpio_intn)) {
err = devm_gpio_request_one(&i2c->dev, hub->gpio_intn,
err = devm_gpio_request_one(dev, hub->gpio_intn,
GPIOF_OUT_INIT_HIGH, "usb3503 intn");
if (err) {
dev_err(&i2c->dev,
"unable to request GPIO %d as connect pin (%d)\n",
hub->gpio_intn, err);
dev_err(dev,
"unable to request GPIO %d as connect pin (%d)\n",
hub->gpio_intn, err);
return err;
}
}
if (gpio_is_valid(hub->gpio_connect)) {
err = devm_gpio_request_one(&i2c->dev, hub->gpio_connect,
err = devm_gpio_request_one(dev, hub->gpio_connect,
GPIOF_OUT_INIT_LOW, "usb3503 connect");
if (err) {
dev_err(&i2c->dev,
"unable to request GPIO %d as connect pin (%d)\n",
hub->gpio_connect, err);
dev_err(dev,
"unable to request GPIO %d as connect pin (%d)\n",
hub->gpio_connect, err);
return err;
}
}
if (gpio_is_valid(hub->gpio_reset)) {
err = devm_gpio_request_one(&i2c->dev, hub->gpio_reset,
err = devm_gpio_request_one(dev, hub->gpio_reset,
GPIOF_OUT_INIT_LOW, "usb3503 reset");
if (err) {
dev_err(&i2c->dev,
"unable to request GPIO %d as reset pin (%d)\n",
hub->gpio_reset, err);
dev_err(dev,
"unable to request GPIO %d as reset pin (%d)\n",
hub->gpio_reset, err);
return err;
}
}
usb3503_switch_mode(hub, hub->mode);
dev_info(&i2c->dev, "%s: probed on %s mode\n", __func__,
dev_info(dev, "%s: probed on %s mode\n", __func__,
(hub->mode == USB3503_MODE_HUB) ? "hub" : "standby");
return 0;
}
static int usb3503_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct usb3503 *hub;
int err;
hub = devm_kzalloc(&i2c->dev, sizeof(struct usb3503), GFP_KERNEL);
if (!hub) {
dev_err(&i2c->dev, "private data alloc fail\n");
return -ENOMEM;
}
i2c_set_clientdata(i2c, hub);
hub->regmap = devm_regmap_init_i2c(i2c, &usb3503_regmap_config);
if (IS_ERR(hub->regmap)) {
err = PTR_ERR(hub->regmap);
dev_err(&i2c->dev, "Failed to initialise regmap: %d\n", err);
return err;
}
hub->dev = &i2c->dev;
return usb3503_probe(hub);
}
static const struct i2c_device_id usb3503_id[] = {
{ USB3503_I2C_NAME, 0 },
{ }
@ -273,7 +282,7 @@ static struct i2c_driver usb3503_driver = {
.name = USB3503_I2C_NAME,
.of_match_table = of_match_ptr(usb3503_of_match),
},
.probe = usb3503_probe,
.probe = usb3503_i2c_probe,
.id_table = usb3503_id,
};