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| author | Bartosz Golaszewski <bgolaszewski@baylibre.com> | 2016-09-16 18:02:42 +0200 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2016-09-24 10:48:18 +0200 |
| commit | 8dd1fe1594a712eb326e1607c694fbd1baf85f4b (patch) | |
| tree | 2058f58e44b3ecd72aac347e308fbcffbbd77625 /include/linux/i2c.h | |
| parent | 72cf8c565cf4e25312fb9fa65d306ae736104ade (diff) | |
| download | linux-8dd1fe1594a712eb326e1607c694fbd1baf85f4b.tar.gz linux-8dd1fe1594a712eb326e1607c694fbd1baf85f4b.tar.bz2 linux-8dd1fe1594a712eb326e1607c694fbd1baf85f4b.zip | |
i2c: export i2c_adapter_depth()
For crazy setups in which an i2c gpio expander is behind an i2c gpio
multiplexer controlled by a gpio provided a second expander using the
same device driver we need to explicitly tell lockdep how to handle
nested locking.
Export i2c_adapter_depth() as public API to be reused outside of i2c
core code.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Acked-by: Peter Rosin <peda@axentia.se>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'include/linux/i2c.h')
| -rw-r--r-- | include/linux/i2c.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/i2c.h b/include/linux/i2c.h index 4a4099d3a4b9..6422eef428c4 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -698,6 +698,7 @@ extern void i2c_clients_command(struct i2c_adapter *adap, extern struct i2c_adapter *i2c_get_adapter(int nr); extern void i2c_put_adapter(struct i2c_adapter *adap); +extern unsigned int i2c_adapter_depth(struct i2c_adapter *adapter); void i2c_parse_fw_timings(struct device *dev, struct i2c_timings *t, bool use_defaults); |