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Diffstat (limited to 'drivers/i2c/busses/i2c-designware-slave.c')
-rw-r--r--drivers/i2c/busses/i2c-designware-slave.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/i2c/busses/i2c-designware-slave.c b/drivers/i2c/busses/i2c-designware-slave.c
index 0548c7ea578c..78d8fb73927d 100644
--- a/drivers/i2c/busses/i2c-designware-slave.c
+++ b/drivers/i2c/busses/i2c-designware-slave.c
@@ -177,6 +177,8 @@ static int i2c_dw_reg_slave(struct i2c_client *slave)
return -EBUSY;
if (slave->flags & I2C_CLIENT_TEN)
return -EAFNOSUPPORT;
+ pm_runtime_get_sync(dev->dev);
+
/*
* Set slave address in the IC_SAR register,
* the address to which the DW_apb_i2c responds.
@@ -205,6 +207,7 @@ static int i2c_dw_unreg_slave(struct i2c_client *slave)
dev->disable_int(dev);
dev->disable(dev);
dev->slave = NULL;
+ pm_runtime_put(dev->dev);
return 0;
}
@@ -272,7 +275,7 @@ static int i2c_dw_irq_handler_slave(struct dw_i2c_dev *dev)
slave_activity = ((dw_readl(dev, DW_IC_STATUS) &
DW_IC_STATUS_SLAVE_ACTIVITY) >> 6);
- if (!enabled || !(raw_stat & ~DW_IC_INTR_ACTIVITY))
+ if (!enabled || !(raw_stat & ~DW_IC_INTR_ACTIVITY) || !dev->slave)
return 0;
dev_dbg(dev->dev,
@@ -382,7 +385,6 @@ int i2c_dw_probe_slave(struct dw_i2c_dev *dev)
ret = i2c_add_numbered_adapter(adap);
if (ret)
dev_err(dev->dev, "failure adding adapter: %d\n", ret);
- pm_runtime_put_noidle(dev->dev);
return ret;
}