From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nicola Corna Subject: [RESEND PATCH 1/3] i2c: added FUNC flag for unsupported clock stretching Date: Wed, 16 Sep 2015 15:32:01 +0200 Message-ID: <1442410323-9833-1-git-send-email-nicola@corna.info> Return-path: Sender: linux-i2c-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Wolfram Sang , Jonathan Cameron , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald Cc: linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Nicola Corna List-Id: linux-i2c@vger.kernel.org Added I2C_FUNC_NO_CLK_STRETCH, to be used when clock stretching is not supported. Signed-off-by: Nicola Corna --- 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