Some drivers open code handling of suspended adapters. It should be
handled by the core, though, to ensure generic handling. This patch adds
the flag and an accessor function.
Signed-off-by: Wolfram Sang <wsa+rene...@sang-engineering.com>
---
drivers/i2c/i2c-core-base.c | 1 +
include/linux/i2c.h | 9 +++++++++
2 files changed, 10 insertions(+)
diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
index 28460f6a60cc..9f89e258c8ff 100644
--- a/drivers/i2c/i2c-core-base.c
+++ b/drivers/i2c/i2c-core-base.c
@@ -1232,6 +1232,7 @@ static int i2c_register_adapter(struct i2c_adapter *adap)
if (!adap->lock_ops)
adap->lock_ops = &i2c_adapter_lock_ops;
+ adap->is_suspended = false;
rt_mutex_init(&adap->bus_lock);
rt_mutex_init(&adap->mux_lock);
mutex_init(&adap->userspace_clients_lock);
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 65b4eaed1d96..9852038ee3a7 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -680,6 +680,7 @@ struct i2c_adapter {
int timeout; /* in jiffies */
int retries;
struct device dev; /* the adapter device */
+ unsigned int is_suspended:1; /* owned by the I2C core */
int nr;
char name[48];
@@ -762,6 +763,14 @@ i2c_unlock_bus(struct i2c_adapter *adapter, unsigned int
flags)
adapter->lock_ops->unlock_bus(adapter, flags);
}
+static inline void i2c_mark_adapter_suspended(struct i2c_adapter *adap,
+ bool suspended)
+{
+ i2c_lock_bus(adap, I2C_LOCK_ROOT_ADAPTER);
+ adap->is_suspended = suspended;
+ i2c_unlock_bus(adap, I2C_LOCK_ROOT_ADAPTER);
+}
+
/*flags for the client struct: */
#define I2C_CLIENT_PEC 0x04 /* Use Packet Error Checking */
#define I2C_CLIENT_TEN 0x10 /* we have a ten bit chip address */
--
2.11.0
