Drivers do this in various ways, let's use one standard way of doing it.
Note: I2C_M_RD is bit 0, so the code could be simplified. To be extremly
robust and to advertise good coding practices, I still use the ternary
operator and let the compilers do the optimizing job.
Signed-off-by: Wolfram Sang <wsa@xxxxxxxxxxxxx>
---
include/linux/i2c.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 200cf13b00f620..c30833b7b0730d 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -654,6 +654,11 @@ static inline int i2c_adapter_id(struct i2c_adapter *adap)
return adap->nr;
}
+static inline u8 i2c_8bit_addr_from_msg(const struct i2c_msg *msg)
+{
+ return (msg->addr << 1) | (msg->flags & I2C_M_RD ? 1 : 0);
+}
+
/**
* module_i2c_driver() - Helper macro for registering a modular I2C driver
* @__i2c_driver: i2c_driver struct
--
2.7.0
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