diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/i2c/i2c-dev.c | 33 |
1 files changed, 8 insertions, 25 deletions
diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c index 58ccddd5c23..6e90dec0256 100644 --- a/drivers/i2c/i2c-dev.c +++ b/drivers/i2c/i2c-dev.c @@ -34,17 +34,14 @@ #include <linux/init.h> #include <linux/i2c.h> #include <linux/i2c-dev.h> -#include <linux/platform_device.h> #include <asm/uaccess.h> static struct i2c_client i2cdev_client_template; struct i2c_dev { - int minor; struct i2c_adapter *adap; struct class_device *class_dev; }; -#define to_i2c_dev(d) container_of(d, struct i2c_dev, class_dev) #define I2C_MINORS 256 static struct i2c_dev *i2c_dev_array[I2C_MINORS]; @@ -60,18 +57,6 @@ static struct i2c_dev *i2c_dev_get_by_minor(unsigned index) return i2c_dev; } -static struct i2c_dev *i2c_dev_get_by_adapter(struct i2c_adapter *adap) -{ - struct i2c_dev *i2c_dev = NULL; - - spin_lock(&i2c_dev_array_lock); - if ((i2c_dev_array[adap->nr]) && - (i2c_dev_array[adap->nr]->adap == adap)) - i2c_dev = i2c_dev_array[adap->nr]; - spin_unlock(&i2c_dev_array_lock); - return i2c_dev; -} - static struct i2c_dev *get_free_i2c_dev(struct i2c_adapter *adap) { struct i2c_dev *i2c_dev; @@ -86,7 +71,7 @@ static struct i2c_dev *get_free_i2c_dev(struct i2c_adapter *adap) dev_err(&adap->dev, "i2c-dev already has a device assigned to this adapter\n"); goto error; } - i2c_dev->minor = adap->nr; + i2c_dev->adap = adap; i2c_dev_array[adap->nr] = i2c_dev; spin_unlock(&i2c_dev_array_lock); return i2c_dev; @@ -98,7 +83,7 @@ error: static void return_i2c_dev(struct i2c_dev *i2c_dev) { spin_lock(&i2c_dev_array_lock); - i2c_dev_array[i2c_dev->minor] = NULL; + i2c_dev_array[i2c_dev->adap->nr] = NULL; spin_unlock(&i2c_dev_array_lock); } @@ -415,21 +400,19 @@ static struct class *i2c_dev_class; static int i2cdev_attach_adapter(struct i2c_adapter *adap) { struct i2c_dev *i2c_dev; - struct device *dev; i2c_dev = get_free_i2c_dev(adap); if (IS_ERR(i2c_dev)) return PTR_ERR(i2c_dev); pr_debug("i2c-dev: adapter [%s] registered as minor %d\n", - adap->name, i2c_dev->minor); + adap->name, adap->nr); /* register this i2c device with the driver core */ - i2c_dev->adap = adap; - dev = &adap->dev; i2c_dev->class_dev = class_device_create(i2c_dev_class, NULL, - MKDEV(I2C_MAJOR, i2c_dev->minor), - dev, "i2c-%d", i2c_dev->minor); + MKDEV(I2C_MAJOR, adap->nr), + &adap->dev, "i2c-%d", + adap->nr); if (!i2c_dev->class_dev) goto error; class_device_create_file(i2c_dev->class_dev, &class_device_attr_name); @@ -444,12 +427,12 @@ static int i2cdev_detach_adapter(struct i2c_adapter *adap) { struct i2c_dev *i2c_dev; - i2c_dev = i2c_dev_get_by_adapter(adap); + i2c_dev = i2c_dev_get_by_minor(adap->nr); if (!i2c_dev) return -ENODEV; return_i2c_dev(i2c_dev); - class_device_destroy(i2c_dev_class, MKDEV(I2C_MAJOR, i2c_dev->minor)); + class_device_destroy(i2c_dev_class, MKDEV(I2C_MAJOR, adap->nr)); kfree(i2c_dev); pr_debug("i2c-dev: adapter [%s] unregistered\n", adap->name); |