This patch series extend device_get_match_data() to struct bus_type, so that buses like I2C can get matched data. There is a plan to replace i2c_get_match_data()->device_get_match_data() later, once this patch hits mainline as it is redundant. v5->v6: * Cced linux-rtc and linux-iio as these subsytems uses i2c_get_match_ data() and this function become redundant once this patch series hits mainline. * Added Rb tag from Sakari for patch#1. * Moved patch#3 from v5 to patch#2 and patch#2 from v5 to patch#4. * Added Rb tag from Andy for patch#2 * Separate patch#3 to prepare for better difference for i2c_match_id() changes. * Merged patch#4 from v5 with patch#4. v4->v5: * Added const struct device_driver variable 'drv' in i2c_device_get_match _data(). * For code readability and maintenance perspective, added separate NULL check for drv and client variable and added comment for NULL check for drv variable. * Created separate patch for converting i2c_of_match_device_sysfs() to non-static. * Removed export symbol for i2c_of_match_device_sysfs(). * Replaced 'dev->driver'->'drv'. * Replaced return value data->NULL to avoid (potentially) stale pointers, if there is no match. v3->v4: * Documented corner case for device_get_match_data() * Dropped struct i2c_driver parameter from i2c_get_match_data_helper() * Split I2C sysfs handling in separate patch(patch#3) * Added space after of_device_id for i2c_of_match_device_sysfs() * Added const parameter for struct i2c_client, to prevent overriding it's pointer. * Moved declaration from public i2c.h->i2c-core.h v2->v3: * Added Rb tag from Andy for patch#1. * Extended to support i2c_of_match_device() as suggested by Andy. * Changed i2c_of_match_device_sysfs() as non-static function as it is needed for i2c_device_get_match_data(). * Added a TODO comment to use i2c_verify_client() when it accepts const pointer. * Added multiple returns to make code path for device_get_match_data() faster in i2c_get_match_data(). RFC v1->v2: * Replaced "Signed-off-by"->"Suggested-by" tag for Dmitry. * Documented device_get_match_data(). * Added multiple returns to make code path for generic fwnode-based lookup faster. * Fixed build warnings reported by kernel test robot <lkp@xxxxxxxxx> * Added const qualifier to return type and parameter struct i2c_driver in i2c_get_match_data_helper(). * Added const qualifier to struct i2c_driver in i2c_get_match_data() * Dropped driver variable from i2c_device_get_match_data() * Replaced to_i2c_client with logic for assigning verify_client as it returns non const pointer. Biju Das (4): drivers: fwnode: Extend device_get_match_data() to struct bus_type i2c: i2c-core-of: Convert i2c_of_match_device_sysfs() to non-static i2c: Enhance i2c_get_match_data() i2c: Add i2c_device_get_match_data() callback drivers/base/property.c | 27 ++++++++++++++++- drivers/i2c/i2c-core-base.c | 58 +++++++++++++++++++++++++++++++------ drivers/i2c/i2c-core-of.c | 4 +-- drivers/i2c/i2c-core.h | 9 ++++++ include/linux/device/bus.h | 3 ++ 5 files changed, 89 insertions(+), 12 deletions(-) -- 2.25.1
