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| author |   Ingo Molnar <mingo@kernel.org> | 2017-07-30 11:15:13 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-07-30 11:15:13 +0200 |
| commit | f5db340f19f14a8df9dfd22d71fba1513e9f1f7e (patch) | |
| tree | 131d3345bc987aee3c922624de816492e7f323a4 /Documentation/i2c/dev-interface | |
| parent | Merge tag 'perf-core-for-mingo-4.14-20170725' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core (diff) | |
| parent | kprobes/x86: Release insn_slot in failure path (diff) | |
Merge branch 'perf/urgent' into perf/core, to pick up latest fixes and refresh the tree
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'Documentation/i2c/dev-interface')
| -rw-r--r-- | Documentation/i2c/dev-interface | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/Documentation/i2c/dev-interface b/Documentation/i2c/dev-interface index bcf919d8625c..5ff19447ac44 100644 --- a/Documentation/i2c/dev-interface +++ b/Documentation/i2c/dev-interface @@ -191,7 +191,7 @@ checking on future transactions.) 4* Other ioctl() calls are converted to in-kernel function calls by i2c-dev. Examples include I2C_FUNCS, which queries the I2C adapter functionality using i2c.h:i2c_get_functionality(), and I2C_SMBUS, which -performs an SMBus transaction using i2c-core.c:i2c_smbus_xfer(). +performs an SMBus transaction using i2c-core-smbus.c:i2c_smbus_xfer(). The i2c-dev driver is responsible for checking all the parameters that come from user-space for validity. After this point, there is no @@ -200,13 +200,13 @@ and calls that would have been performed by kernel I2C chip drivers directly. This means that I2C bus drivers don't need to implement anything special to support access from user-space. -5* These i2c-core.c/i2c.h functions are wrappers to the actual -implementation of your I2C bus driver. Each adapter must declare -callback functions implementing these standard calls. -i2c.h:i2c_get_functionality() calls i2c_adapter.algo->functionality(), -while i2c-core.c:i2c_smbus_xfer() calls either +5* These i2c.h functions are wrappers to the actual implementation of +your I2C bus driver. Each adapter must declare callback functions +implementing these standard calls. i2c.h:i2c_get_functionality() calls +i2c_adapter.algo->functionality(), while +i2c-core-smbus.c:i2c_smbus_xfer() calls either adapter.algo->smbus_xfer() if it is implemented, or if not, -i2c-core.c:i2c_smbus_xfer_emulated() which in turn calls +i2c-core-smbus.c:i2c_smbus_xfer_emulated() which in turn calls i2c_adapter.algo->master_xfer(). After your I2C bus driver has processed these requests, execution runs |