diff options
| author |   Peter Rosin <peda@axentia.se> | 2016-05-04 22:15:28 +0200 |
|---|---|---|
| committer |   Wolfram Sang <wsa@the-dreams.de> | 2016-05-04 22:28:31 +0200 |
| commit | fa96f0cb9b37a1a296d18f7bde63b0910852303e (patch) | |
| tree | 648fadf4d45091fb4e92fcf6e7f6f50e51bb13b1 /drivers/i2c/i2c-mux.c | |
| parent | i2c: allow adapter drivers to override the adapter locking (diff) | |
| download | wireguard-linux-fa96f0cb9b37a1a296d18f7bde63b0910852303e.tar.xz wireguard-linux-fa96f0cb9b37a1a296d18f7bde63b0910852303e.zip | |
i2c: muxes always lock the parent adapter
Instead of checking for i2c parent adapters for every lock/unlock, simply
override the locking for muxes to always lock/unlock the parent adapter
directly.
Signed-off-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c/i2c-mux.c')
| -rw-r--r-- | drivers/i2c/i2c-mux.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/i2c/i2c-mux.c b/drivers/i2c/i2c-mux.c index 25e9336b0e6e..5fa8af715e24 100644 --- a/drivers/i2c/i2c-mux.c +++ b/drivers/i2c/i2c-mux.c @@ -98,6 +98,33 @@ static unsigned int i2c_mux_parent_classes(struct i2c_adapter *parent) return class; } +static void i2c_parent_lock_bus(struct i2c_adapter *adapter, + unsigned int flags) +{ + struct i2c_mux_priv *priv = adapter->algo_data; + struct i2c_adapter *parent = priv->muxc->parent; + + parent->lock_bus(parent, flags); +} + +static int i2c_parent_trylock_bus(struct i2c_adapter *adapter, + unsigned int flags) +{ + struct i2c_mux_priv *priv = adapter->algo_data; + struct i2c_adapter *parent = priv->muxc->parent; + + return parent->trylock_bus(parent, flags); +} + +static void i2c_parent_unlock_bus(struct i2c_adapter *adapter, + unsigned int flags) +{ + struct i2c_mux_priv *priv = adapter->algo_data; + struct i2c_adapter *parent = priv->muxc->parent; + + parent->unlock_bus(parent, flags); +} + struct i2c_mux_core *i2c_mux_alloc(struct i2c_adapter *parent, struct device *dev, int max_adapters, int sizeof_priv, u32 flags, @@ -165,6 +192,9 @@ int i2c_mux_add_adapter(struct i2c_mux_core *muxc, priv->adap.retries = parent->retries; priv->adap.timeout = parent->timeout; priv->adap.quirks = parent->quirks; + priv->adap.lock_bus = i2c_parent_lock_bus; + priv->adap.trylock_bus = i2c_parent_trylock_bus; + priv->adap.unlock_bus = i2c_parent_unlock_bus; /* Sanity check on class */ if (i2c_mux_parent_classes(parent) & class) |