summaryrefslogtreecommitdiffstats
path: root/drivers/i2c
diff options
context:
space:
mode:
authorWolfram Sang <wsa+renesas@sang-engineering.com>2015-12-16 20:05:18 +0100
committerWolfram Sang <wsa@the-dreams.de>2015-12-19 12:00:37 +0100
commitb4cd08aa1f53c831e67dc5c6bc9f9acff27abcba (patch)
tree58141870b6398365cb1a4b7a98e0b94161e0c0b3 /drivers/i2c
parente79e72c5a242fa21c971cfb40017f1039daf4d77 (diff)
downloadop-kernel-dev-b4cd08aa1f53c831e67dc5c6bc9f9acff27abcba.zip
op-kernel-dev-b4cd08aa1f53c831e67dc5c6bc9f9acff27abcba.tar.gz
i2c: rcar: disable runtime PM correctly in slave mode
When we also are I2C slave, we need to disable runtime PM because the address detection mechanism needs to be active all the time. However, we can reenable runtime PM once the slave instance was unregistered. So, use pm_runtime_get_sync/put to achieve this, since it has proper refcounting. pm_runtime_allow/forbid is like a global knob controllable from userspace which is unsuitable here. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Cc: stable@kernel.org
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/busses/i2c-rcar.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c
index b0ae560..599c0d7 100644
--- a/drivers/i2c/busses/i2c-rcar.c
+++ b/drivers/i2c/busses/i2c-rcar.c
@@ -576,7 +576,7 @@ static int rcar_reg_slave(struct i2c_client *slave)
if (slave->flags & I2C_CLIENT_TEN)
return -EAFNOSUPPORT;
- pm_runtime_forbid(rcar_i2c_priv_to_dev(priv));
+ pm_runtime_get_sync(rcar_i2c_priv_to_dev(priv));
priv->slave = slave;
rcar_i2c_write(priv, ICSAR, slave->addr);
@@ -598,7 +598,7 @@ static int rcar_unreg_slave(struct i2c_client *slave)
priv->slave = NULL;
- pm_runtime_allow(rcar_i2c_priv_to_dev(priv));
+ pm_runtime_put(rcar_i2c_priv_to_dev(priv));
return 0;
}
OpenPOWER on IntegriCloud