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| author |   Phil Carmody <phil.carmody@partner.samsung.com> | 2013-06-26 10:56:35 +0300 |
|---|---|---|
| committer |   Wolfram Sang <wsa@the-dreams.de> | 2013-08-07 16:58:08 +0200 |
| commit | 3923172b3d700486c1ca24df9c4c5405a83e2309 (patch) | |
| tree | b7f9ec98c0f30b21c7cf08874ae2f2fce2309f66 /include/linux/i2c.h | |
| parent | i2c: designware: Manually set RESTART bit between messages (diff) | |
| download | linux-dev-3923172b3d700486c1ca24df9c4c5405a83e2309.tar.xz linux-dev-3923172b3d700486c1ca24df9c4c5405a83e2309.zip | |
i2c: reduce parent checking to a NOOP in non-I2C_MUX case
In 0826374 - i2c: Multiplexed I2C bus core support
core i2c code increased in size and complexity even when I2C_MUX
wasn't selected.
Turning this check into a constant NULL in the n case lets the
client functions in be simplified too, not needing to include
never-called calls to the mux-specific helpers.
Signed-off-by: Phil Carmody <phil.carmody@partner.samsung.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'include/linux/i2c.h')
| -rw-r--r-- | include/linux/i2c.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/i2c.h b/include/linux/i2c.h index e988fa935b3c..b3c4b8dac1ce 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -447,11 +447,13 @@ static inline void i2c_set_adapdata(struct i2c_adapter *dev, void *data) static inline struct i2c_adapter * i2c_parent_is_i2c_adapter(const struct i2c_adapter *adapter) { +#if IS_ENABLED(I2C_MUX) struct device *parent = adapter->dev.parent; if (parent != NULL && parent->type == &i2c_adapter_type) return to_i2c_adapter(parent); else +#endif return NULL; } |