diff options
| -rw-r--r-- | drivers/i2c/i2c-atr.c | 7 | ||||
| -rw-r--r-- | include/linux/i2c-atr.h | 2 |
2 files changed, 7 insertions, 2 deletions
diff --git a/drivers/i2c/i2c-atr.c b/drivers/i2c/i2c-atr.c index 19422df0fe37..01b1ba6a1b5a 100644 --- a/drivers/i2c/i2c-atr.c +++ b/drivers/i2c/i2c-atr.c @@ -394,6 +394,9 @@ static int i2c_atr_map_msgs(struct i2c_atr_chan *chan, struct i2c_msg *msgs, c2a = i2c_atr_get_mapping_by_addr(chan, msgs[i].addr); if (!c2a) { + if (atr->flags & I2C_ATR_F_PASSTHROUGH) + continue; + dev_err(atr->dev, "client 0x%02x not mapped!\n", msgs[i].addr); @@ -486,13 +489,13 @@ static int i2c_atr_smbus_xfer(struct i2c_adapter *adap, u16 addr, c2a = i2c_atr_get_mapping_by_addr(chan, addr); - if (!c2a) { + if (!c2a && !(atr->flags & I2C_ATR_F_PASSTHROUGH)) { dev_err(atr->dev, "client 0x%02x not mapped!\n", addr); mutex_unlock(&chan->alias_pairs_lock); return -ENXIO; } - alias = c2a->alias; + alias = c2a ? c2a->alias : addr; mutex_unlock(&chan->alias_pairs_lock); diff --git a/include/linux/i2c-atr.h b/include/linux/i2c-atr.h index 5aaab1598084..2bb54dc87c8e 100644 --- a/include/linux/i2c-atr.h +++ b/include/linux/i2c-atr.h @@ -26,9 +26,11 @@ struct i2c_atr; * devices being added or removed from a child bus. * The ATR pool will have to be big enough to accomodate all * devices expected to be added to the child buses. + * @I2C_ATR_F_PASSTHROUGH: Allow unmapped incoming addresses to pass through */ enum i2c_atr_flags { I2C_ATR_F_STATIC = BIT(0), + I2C_ATR_F_PASSTHROUGH = BIT(1), }; /** |