#include <linux/slab.h>
/* multiplexer per channel data */
-struct i2c_mux_priv_old {
- void *mux_priv;
- int (*select)(struct i2c_adapter *, void *mux_priv, u32 chan_id);
- int (*deselect)(struct i2c_adapter *, void *mux_priv, u32 chan_id);
-};
-
struct i2c_mux_priv {
struct i2c_adapter adap;
struct i2c_algorithm algo;
return class;
}
-static int i2c_mux_select(struct i2c_mux_core *muxc, u32 chan)
-{
- struct i2c_mux_priv_old *priv = i2c_mux_priv(muxc);
-
- return priv->select(muxc->parent, priv->mux_priv, chan);
-}
-
-static int i2c_mux_deselect(struct i2c_mux_core *muxc, u32 chan)
-{
- struct i2c_mux_priv_old *priv = i2c_mux_priv(muxc);
-
- return priv->deselect(muxc->parent, priv->mux_priv, chan);
-}
-
-struct i2c_adapter *i2c_add_mux_adapter(struct i2c_adapter *parent,
- struct device *mux_dev,
- void *mux_priv, u32 force_nr, u32 chan_id,
- unsigned int class,
- int (*select) (struct i2c_adapter *,
- void *, u32),
- int (*deselect) (struct i2c_adapter *,
- void *, u32))
-{
- struct i2c_mux_core *muxc;
- struct i2c_mux_priv_old *priv;
- int ret;
-
- muxc = i2c_mux_alloc(parent, mux_dev, 1, sizeof(*priv), 0,
- i2c_mux_select, i2c_mux_deselect);
- if (!muxc)
- return NULL;
-
- priv = i2c_mux_priv(muxc);
- priv->select = select;
- priv->deselect = deselect;
- priv->mux_priv = mux_priv;
-
- ret = i2c_mux_add_adapter(muxc, force_nr, chan_id, class);
- if (ret) {
- devm_kfree(mux_dev, muxc);
- return NULL;
- }
-
- return muxc->adapter[0];
-}
-EXPORT_SYMBOL_GPL(i2c_add_mux_adapter);
-
struct i2c_mux_core *i2c_mux_alloc(struct i2c_adapter *parent,
struct device *dev, int max_adapters,
int sizeof_priv, u32 flags,
}
EXPORT_SYMBOL_GPL(i2c_mux_del_adapters);
-void i2c_del_mux_adapter(struct i2c_adapter *adap)
-{
- struct i2c_mux_priv *priv = adap->algo_data;
- struct i2c_mux_core *muxc = priv->muxc;
-
- i2c_mux_del_adapters(muxc);
- devm_kfree(muxc->dev, muxc);
-}
-EXPORT_SYMBOL_GPL(i2c_del_mux_adapter);
-
MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
MODULE_DESCRIPTION("I2C driver for multiplexed I2C busses");
MODULE_LICENSE("GPL v2");
return muxc->priv;
}
-/*
- * Called to create a i2c bus on a multiplexed bus segment.
- * The mux_dev and chan_id parameters are passed to the select
- * and deselect callback functions to perform hardware-specific
- * mux control.
- */
-struct i2c_adapter *i2c_add_mux_adapter(struct i2c_adapter *parent,
- struct device *mux_dev,
- void *mux_priv, u32 force_nr, u32 chan_id,
- unsigned int class,
- int (*select) (struct i2c_adapter *,
- void *mux_dev, u32 chan_id),
- int (*deselect) (struct i2c_adapter *,
- void *mux_dev, u32 chan_id));
/*
* Called to create an i2c bus on a multiplexed bus segment.
* The chan_id parameter is passed to the select and deselect
u32 force_nr, u32 chan_id,
unsigned int class);
-void i2c_del_mux_adapter(struct i2c_adapter *adap);
void i2c_mux_del_adapters(struct i2c_mux_core *muxc);
#endif /* __KERNEL__ */