Messages in this thread Patch in this message | | | From | Julia Lawall <> | Subject | [PATCH 1/13] include/linux/i2c.h: introduce macros for i2c_msg initialization | Date | Sun, 7 Oct 2012 17:38:31 +0200 |
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From: Julia Lawall <Julia.Lawall@lip6.fr>
This patch introduces some macros for describing how an i2c_msg is being initialized. There are three macros: I2C_MSG_READ, for a read message, I2C_MSG_WRITE, for a write message, and I2C_MSG_OP, for some other kind of message, which is expected to be very rarely used.
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
--- include/linux/i2c.h | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/include/linux/i2c.h b/include/linux/i2c.h index 94aed0c..885ebea 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -556,6 +556,12 @@ struct i2c_msg { __u8 *buf; /* pointer to msg data */ }; +#define I2C_MSG_OP(_addr, _buf, _len, _flags) \ + { .addr = _addr, .buf = _buf, .len = _len, .flags = _flags } + +#define I2C_MSG_WRITE(addr, buf, len) I2C_MSG_OP(addr, buf, len, 0) +#define I2C_MSG_READ(addr, buf, len) I2C_MSG_OP(addr, buf, len, I2C_M_RD) + /* To determine what functionality is present */ #define I2C_FUNC_I2C 0x00000001
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