From 8a9947552d43b0d20d5fa23ac0ba435d526be454 Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Sat, 26 Nov 2005 20:28:06 +0100 Subject: [PATCH] i2c: Drop i2c_driver.flags, 2 of 3 Just about every i2c chip driver sets the I2C_DF_NOTIFY flag, so we can simply make it the default and drop the flag. If any driver really doesn't want to be notified when i2c adapters are added, that driver can simply omit to set .attach_adapter. This approach is also more robust as it prevents accidental NULL pointer dereferences. Signed-off-by: Jean Delvare Signed-off-by: Greg Kroah-Hartman --- drivers/i2c/i2c-dev.c | 1 - 1 file changed, 1 deletion(-) (limited to 'drivers/i2c/i2c-dev.c') diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c index 8af0bd1424d2..9da51eb37c06 100644 --- a/drivers/i2c/i2c-dev.c +++ b/drivers/i2c/i2c-dev.c @@ -484,7 +484,6 @@ static struct i2c_driver i2cdev_driver = { .owner = THIS_MODULE, .name = "dev_driver", .id = I2C_DRIVERID_I2CDEV, - .flags = I2C_DF_NOTIFY, .attach_adapter = i2cdev_attach_adapter, .detach_adapter = i2cdev_detach_adapter, .detach_client = i2cdev_detach_client, -- cgit v1.2.1 From 35d8b2e6b8e86b0d5126f36613b5202d4eb978b6 Mon Sep 17 00:00:00 2001 From: Laurent Riffard Date: Sat, 26 Nov 2005 20:34:05 +0100 Subject: [PATCH] i2c: Drop i2c_driver.{owner,name}, 1 of 11 We should use the i2c_driver.driver's .name and .owner fields instead of the i2c_driver's ones. This patch updates the core of the i2c drivers: it removes .name and .owner fields from the struct i2c_device and modify various functions to use struct device fields instead. Signed-off-by: Laurent Riffard Signed-off-by: Jean Delvare Signed-off-by: Greg Kroah-Hartman --- drivers/i2c/i2c-dev.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'drivers/i2c/i2c-dev.c') diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c index 9da51eb37c06..9715217a0343 100644 --- a/drivers/i2c/i2c-dev.c +++ b/drivers/i2c/i2c-dev.c @@ -481,8 +481,10 @@ static int i2cdev_command(struct i2c_client *client, unsigned int cmd, } static struct i2c_driver i2cdev_driver = { - .owner = THIS_MODULE, - .name = "dev_driver", + .driver = { + .owner = THIS_MODULE, + .name = "dev_driver", + }, .id = I2C_DRIVERID_I2CDEV, .attach_adapter = i2cdev_attach_adapter, .detach_adapter = i2cdev_detach_adapter, -- cgit v1.2.1 From 2b48716d1d2f2edb1e7cbc5ecf1cb2cb39373e33 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 6 Dec 2005 15:33:15 -0800 Subject: [PATCH] I2C: Remove .owner setting from i2c_driver as it's no longer needed Now that i2c_add_driver() doesn't need the module owner to be set by hand, we can delete it from the drivers. This patch catches all of the drivers that I found in the current tree (if a driver sets the .owner by hand, it's not a problem, just not needed.) Signed-off-by: Greg Kroah-Hartman Cc: Jean Delvare --- drivers/i2c/i2c-dev.c | 1 - 1 file changed, 1 deletion(-) (limited to 'drivers/i2c/i2c-dev.c') diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c index 9715217a0343..e140dd7d6a0c 100644 --- a/drivers/i2c/i2c-dev.c +++ b/drivers/i2c/i2c-dev.c @@ -482,7 +482,6 @@ static int i2cdev_command(struct i2c_client *client, unsigned int cmd, static struct i2c_driver i2cdev_driver = { .driver = { - .owner = THIS_MODULE, .name = "dev_driver", }, .id = I2C_DRIVERID_I2CDEV, -- cgit v1.2.1 From 79472132f555ae1e912699e116e5c82f338872f6 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 6 Dec 2005 15:33:15 -0800 Subject: [PATCH] I2C: move i2c-dev to use dynamic class devices i2c-dev doesn't use the reference counting logic of struct class_device so move it to the dynamic method. This makes the code paths simpler and the driver smaller. Signed-off-by: Greg Kroah-Hartman Cc: Jean Delvare --- drivers/i2c/i2c-dev.c | 50 ++++++++++++++++++++------------------------------ 1 file changed, 20 insertions(+), 30 deletions(-) (limited to 'drivers/i2c/i2c-dev.c') diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c index e140dd7d6a0c..ad6e04fc2c03 100644 --- a/drivers/i2c/i2c-dev.c +++ b/drivers/i2c/i2c-dev.c @@ -42,8 +42,7 @@ static struct i2c_client i2cdev_client_template; struct i2c_dev { int minor; struct i2c_adapter *adap; - struct class_device class_dev; - struct completion released; /* FIXME, we need a class_device_unregister() */ + struct class_device *class_dev; }; #define to_i2c_dev(d) container_of(d, struct i2c_dev, class_dev) @@ -105,7 +104,10 @@ static void return_i2c_dev(struct i2c_dev *i2c_dev) static ssize_t show_adapter_name(struct class_device *class_dev, char *buf) { - struct i2c_dev *i2c_dev = to_i2c_dev(class_dev); + struct i2c_dev *i2c_dev = i2c_dev_get_by_minor(MINOR(class_dev->devt)); + + if (!i2c_dev) + return -ENODEV; return sprintf(buf, "%s\n", i2c_dev->adap->name); } static CLASS_DEVICE_ATTR(name, S_IRUGO, show_adapter_name, NULL); @@ -408,21 +410,12 @@ static struct file_operations i2cdev_fops = { .release = i2cdev_release, }; -static void release_i2c_dev(struct class_device *dev) -{ - struct i2c_dev *i2c_dev = to_i2c_dev(dev); - complete(&i2c_dev->released); -} - -static struct class i2c_dev_class = { - .name = "i2c-dev", - .release = &release_i2c_dev, -}; +static struct class *i2c_dev_class; static int i2cdev_attach_adapter(struct i2c_adapter *adap) { struct i2c_dev *i2c_dev; - int retval; + struct device *dev; i2c_dev = get_free_i2c_dev(adap); if (IS_ERR(i2c_dev)) @@ -434,21 +427,20 @@ static int i2cdev_attach_adapter(struct i2c_adapter *adap) /* register this i2c device with the driver core */ i2c_dev->adap = adap; if (adap->dev.parent == &platform_bus) - i2c_dev->class_dev.dev = &adap->dev; + dev = &adap->dev; else - i2c_dev->class_dev.dev = adap->dev.parent; - i2c_dev->class_dev.class = &i2c_dev_class; - i2c_dev->class_dev.devt = MKDEV(I2C_MAJOR, i2c_dev->minor); - snprintf(i2c_dev->class_dev.class_id, BUS_ID_SIZE, "i2c-%d", i2c_dev->minor); - retval = class_device_register(&i2c_dev->class_dev); - if (retval) + dev = adap->dev.parent; + i2c_dev->class_dev = class_device_create(i2c_dev_class, NULL, + MKDEV(I2C_MAJOR, i2c_dev->minor), + dev, "i2c-%d", i2c_dev->minor); + if (!i2c_dev->class_dev) goto error; - class_device_create_file(&i2c_dev->class_dev, &class_device_attr_name); + class_device_create_file(i2c_dev->class_dev, &class_device_attr_name); return 0; error: return_i2c_dev(i2c_dev); kfree(i2c_dev); - return retval; + return -ENODEV; } static int i2cdev_detach_adapter(struct i2c_adapter *adap) @@ -459,10 +451,8 @@ static int i2cdev_detach_adapter(struct i2c_adapter *adap) if (!i2c_dev) return -ENODEV; - init_completion(&i2c_dev->released); return_i2c_dev(i2c_dev); - class_device_unregister(&i2c_dev->class_dev); - wait_for_completion(&i2c_dev->released); + class_device_destroy(i2c_dev_class, MKDEV(I2C_MAJOR, i2c_dev->minor)); kfree(i2c_dev); pr_debug("i2c-dev: adapter [%s] unregistered\n", adap->name); @@ -507,8 +497,8 @@ static int __init i2c_dev_init(void) if (res) goto out; - res = class_register(&i2c_dev_class); - if (res) + i2c_dev_class = class_create(THIS_MODULE, "i2c-dev"); + if (IS_ERR(i2c_dev_class)) goto out_unreg_chrdev; res = i2c_add_driver(&i2cdev_driver); @@ -518,7 +508,7 @@ static int __init i2c_dev_init(void) return 0; out_unreg_class: - class_unregister(&i2c_dev_class); + class_destroy(i2c_dev_class); out_unreg_chrdev: unregister_chrdev(I2C_MAJOR, "i2c"); out: @@ -529,7 +519,7 @@ out: static void __exit i2c_dev_exit(void) { i2c_del_driver(&i2cdev_driver); - class_unregister(&i2c_dev_class); + class_destroy(i2c_dev_class); unregister_chrdev(I2C_MAJOR,"i2c"); } -- cgit v1.2.1 From d564baee2984098c73fd0e55bc5c8a890878ef3b Mon Sep 17 00:00:00 2001 From: Laurent Riffard Date: Sun, 18 Dec 2005 16:49:30 +0100 Subject: [PATCH] i2c: drop empty i2c_driver.command implementations Given that implementing i2c_driver.command is optional, there is no point in an empty implementation thereof. Signed-off-by: Laurent Riffard Signed-off-by: Jean Delvare Cc: Michael Geng Cc: Petr Vandrovec Signed-off-by: Greg Kroah-Hartman --- drivers/i2c/i2c-dev.c | 7 ------- 1 file changed, 7 deletions(-) (limited to 'drivers/i2c/i2c-dev.c') diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c index ad6e04fc2c03..ed7eed388bae 100644 --- a/drivers/i2c/i2c-dev.c +++ b/drivers/i2c/i2c-dev.c @@ -464,12 +464,6 @@ static int i2cdev_detach_client(struct i2c_client *client) return 0; } -static int i2cdev_command(struct i2c_client *client, unsigned int cmd, - void *arg) -{ - return -1; -} - static struct i2c_driver i2cdev_driver = { .driver = { .name = "dev_driver", @@ -478,7 +472,6 @@ static struct i2c_driver i2cdev_driver = { .attach_adapter = i2cdev_attach_adapter, .detach_adapter = i2cdev_detach_adapter, .detach_client = i2cdev_detach_client, - .command = i2cdev_command, }; static struct i2c_client i2cdev_client_template = { -- cgit v1.2.1