From f67f129e519fa87f8ebd236b6336fe43f31ee141 Mon Sep 17 00:00:00 2001 From: Ming Lei Date: Sun, 1 Mar 2009 21:10:49 +0800 Subject: Driver core: implement uevent suppress in kobject This patch implements uevent suppress in kobject and removes it from struct device, based on the following ideas: 1,Uevent sending should be one attribute of kobject, so suppressing it in kobject layer is more natural than in device layer. By this way, we can do it for other objects embedded with kobject. 2,It may save several bytes for each instance of struct device.(On my omap3(32bit ARM) based box, can save 8bytes per device object) This patch also introduces dev_set|get_uevent_suppress() helpers to set and query uevent_suppress attribute in case to help kobject as private part of struct device in future. [This version is against the latest driver-core patch set of Greg,please ignore the last version.] Signed-off-by: Ming Lei Signed-off-by: Greg Kroah-Hartman --- drivers/i2c/i2c-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/i2c/i2c-core.c') diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index e7d984866de0..fbb9030b68a5 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -841,7 +841,7 @@ int i2c_attach_client(struct i2c_client *client) if (client->driver && !is_newstyle_driver(client->driver)) { client->dev.release = i2c_client_release; - client->dev.uevent_suppress = 1; + dev_set_uevent_suppress(&client->dev, 1); } else client->dev.release = i2c_client_dev_release; -- cgit v1.2.3 From acec211ca605d79083058e6037bbf131c3f993fc Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Sat, 28 Mar 2009 21:34:40 +0100 Subject: i2c: Clarify which clients are auto-removed The automatic removal of i2c clients only affects the clients which were created automatically in the first place. Add a comment saying that to avoid any confusion. Signed-off-by: Jean Delvare --- drivers/i2c/i2c-core.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'drivers/i2c/i2c-core.c') diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index fbb9030b68a5..456caa80bfd3 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -581,7 +581,8 @@ static int i2c_do_del_adapter(struct device_driver *d, void *data) struct i2c_client *client, *_n; int res; - /* Remove the devices we created ourselves */ + /* Remove the devices we created ourselves as the result of hardware + * probing (using a driver's detect method) */ list_for_each_entry_safe(client, _n, &driver->clients, detected) { if (client->adapter == adapter) { dev_dbg(&adapter->dev, "Removing %s at 0x%x\n", @@ -749,6 +750,8 @@ static int __detach_adapter(struct device *dev, void *data) struct i2c_driver *driver = data; struct i2c_client *client, *_n; + /* Remove the devices we created ourselves as the result of hardware + * probing (using a driver's detect method) */ list_for_each_entry_safe(client, _n, &driver->clients, detected) { dev_dbg(&adapter->dev, "Removing %s at 0x%x\n", client->name, client->addr); -- cgit v1.2.3 From 8fcfef6e65c5b58e6482eae0b793319c8d9efd44 Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Sat, 28 Mar 2009 21:34:43 +0100 Subject: i2c: Set a default timeout value for all adapters Setting a default timeout value on a per-algo basis doesn't make any sense. Move the default value setting to i2c-core. Individual adapter drivers can specify a different (non-zero) value if they wish. Also express the timeout value in a way which results in the same duration regarless of the value of HZ. Signed-off-by: Jean Delvare Acked-by: Wolfram Sang --- drivers/i2c/i2c-core.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/i2c/i2c-core.c') diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 456caa80bfd3..e361033815d3 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -459,6 +459,11 @@ static int i2c_register_adapter(struct i2c_adapter *adap) pr_debug("I2C adapter driver [%s] forgot to specify " "physical device\n", adap->name); } + + /* Set default timeout to 1 second if not already set */ + if (adap->timeout == 0) + adap->timeout = HZ; + dev_set_name(&adap->dev, "i2c-%d", adap->nr); adap->dev.release = &i2c_adapter_dev_release; adap->dev.class = &i2c_adapter_class; -- cgit v1.2.3 From 09b8ce0a691d8e76f14a16ac6cbfde899f6c68e3 Mon Sep 17 00:00:00 2001 From: Zhenwen Xu Date: Sat, 28 Mar 2009 21:34:46 +0100 Subject: i2c-core: Some style cleanups Some lines over 80. The printk(KERN_ERR ... ) should be dev_err. And some blankspace should be deleted. Signed-off-by: Zhenwen Xu Signed-off-by: Jean Delvare --- drivers/i2c/i2c-core.c | 26 +++++++++++++------------- 1 file changed, 13 insertions(+), 13 deletions(-) (limited to 'drivers/i2c/i2c-core.c') diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index e361033815d3..b6f3a0de6ca2 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -152,7 +152,7 @@ static void i2c_device_shutdown(struct device *dev) driver->shutdown(to_i2c_client(dev)); } -static int i2c_device_suspend(struct device * dev, pm_message_t mesg) +static int i2c_device_suspend(struct device *dev, pm_message_t mesg) { struct i2c_driver *driver; @@ -164,7 +164,7 @@ static int i2c_device_suspend(struct device * dev, pm_message_t mesg) return driver->suspend(to_i2c_client(dev), mesg); } -static int i2c_device_resume(struct device * dev) +static int i2c_device_resume(struct device *dev) { struct i2c_driver *driver; @@ -187,13 +187,15 @@ static void i2c_client_dev_release(struct device *dev) kfree(to_i2c_client(dev)); } -static ssize_t show_client_name(struct device *dev, struct device_attribute *attr, char *buf) +static ssize_t +show_client_name(struct device *dev, struct device_attribute *attr, char *buf) { struct i2c_client *client = to_i2c_client(dev); return sprintf(buf, "%s\n", client->name); } -static ssize_t show_modalias(struct device *dev, struct device_attribute *attr, char *buf) +static ssize_t +show_modalias(struct device *dev, struct device_attribute *attr, char *buf) { struct i2c_client *client = to_i2c_client(dev); return sprintf(buf, "%s%s\n", I2C_MODULE_PREFIX, client->name); @@ -365,8 +367,7 @@ static struct i2c_driver dummy_driver = { * This returns the new i2c client, which should be saved for later use with * i2c_unregister_device(); or NULL to indicate an error. */ -struct i2c_client * -i2c_new_dummy(struct i2c_adapter *adapter, u16 address) +struct i2c_client *i2c_new_dummy(struct i2c_adapter *adapter, u16 address) { struct i2c_board_info info = { I2C_BOARD_INFO("dummy", address), @@ -413,8 +414,8 @@ static void i2c_scan_static_board_info(struct i2c_adapter *adapter) if (devinfo->busnum == adapter->nr && !i2c_new_device(adapter, &devinfo->board_info)) - printk(KERN_ERR "i2c-core: can't create i2c%d-%04x\n", - i2c_adapter_id(adapter), + dev_err(&adapter->dev, + "Can't create device at 0x%02x\n", devinfo->board_info.addr); } mutex_unlock(&__i2c_board_lock); @@ -1020,7 +1021,7 @@ module_exit(i2c_exit); * Note that there is no requirement that each message be sent to * the same slave address, although that is the most common model. */ -int i2c_transfer(struct i2c_adapter * adap, struct i2c_msg *msgs, int num) +int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) { int ret; @@ -1527,8 +1528,7 @@ EXPORT_SYMBOL(i2c_put_adapter); /* The SMBus parts */ #define POLY (0x1070U << 3) -static u8 -crc8(u16 data) +static u8 crc8(u16 data) { int i; @@ -1992,9 +1992,9 @@ static s32 i2c_smbus_xfer_emulated(struct i2c_adapter * adapter, u16 addr, * This executes an SMBus protocol operation, and returns a negative * errno code else zero on success. */ -s32 i2c_smbus_xfer(struct i2c_adapter * adapter, u16 addr, unsigned short flags, +s32 i2c_smbus_xfer(struct i2c_adapter *adapter, u16 addr, unsigned short flags, char read_write, u8 command, int protocol, - union i2c_smbus_data * data) + union i2c_smbus_data *data) { s32 res; -- cgit v1.2.3