On Wed, Sep 16, 2015 at 03:32:01PM +0200, Nicola Corna wrote:
> Added I2C_FUNC_NO_CLK_STRETCH, to be used when clock stretching is not
> supported.
>
> Signed-off-by: Nicola Corna <nicola@xxxxxxxxxx>
I think this should be rather a quirk than a functionality, i.e.
I2C_AQ_NO_CLK_STRETCH. Agree?
> ---
> Documentation/i2c/functionality | 1 +
> include/uapi/linux/i2c.h | 1 +
> 2 files changed, 2 insertions(+)
>
> diff --git a/Documentation/i2c/functionality b/Documentation/i2c/functionality
> index 4aae8ed..f53807e 100644
> --- a/Documentation/i2c/functionality
> +++ b/Documentation/i2c/functionality
> @@ -21,6 +21,7 @@ For the most up-to-date list of functionality constants, please check
> I2C_M_REV_DIR_ADDR and I2C_M_NO_RD_ACK
> flags (which modify the I2C protocol!)
> I2C_FUNC_NOSTART Can skip repeated start sequence
> + I2C_FUNC_NO_CLK_STRETCH Does NOT support clock stretching
> I2C_FUNC_SMBUS_QUICK Handles the SMBus write_quick command
> I2C_FUNC_SMBUS_READ_BYTE Handles the SMBus read_byte command
> I2C_FUNC_SMBUS_WRITE_BYTE Handles the SMBus write_byte command
> diff --git a/include/uapi/linux/i2c.h b/include/uapi/linux/i2c.h
> index b0a7dd6..59e4b43 100644
> --- a/include/uapi/linux/i2c.h
> +++ b/include/uapi/linux/i2c.h
> @@ -88,6 +88,7 @@ struct i2c_msg {
> #define I2C_FUNC_SMBUS_PEC 0x00000008
> #define I2C_FUNC_NOSTART 0x00000010 /* I2C_M_NOSTART */
> #define I2C_FUNC_SLAVE 0x00000020
> +#define I2C_FUNC_NO_CLK_STRETCH 0x00000040 /* No check for SCL low */
> #define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000 /* SMBus 2.0 */
> #define I2C_FUNC_SMBUS_QUICK 0x00010000
> #define I2C_FUNC_SMBUS_READ_BYTE 0x00020000
> --
> 2.5.1
>
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