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i2c: add i2c quirk flag for unsupported clock stretching 

Add I2C_AQ_NO_CLK_STRETCH quirk flag, to be used when clock stretching is
not supported.

Signed-off-by: Nicola Corna <nicola@corna.info>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Nicola Corna 2015-10-29 12:34:23 +01:00 committed by Wolfram Sang
parent 77c6801967
commit 749de3dac5
1 changed files with 2 additions and 0 deletions
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2
include/linux/i2c.h
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@ -493,6 +493,8 @@ struct i2c_adapter_quirks {
/* convenience macro for typical write-then read case */ /* convenience macro for typical write-then read case */
#define I2C_AQ_COMB_WRITE_THEN_READ (I2C_AQ_COMB | I2C_AQ_COMB_WRITE_FIRST | \ #define I2C_AQ_COMB_WRITE_THEN_READ (I2C_AQ_COMB | I2C_AQ_COMB_WRITE_FIRST | \
I2C_AQ_COMB_READ_SECOND | I2C_AQ_COMB_SAME_ADDR) I2C_AQ_COMB_READ_SECOND | I2C_AQ_COMB_SAME_ADDR)
/* clock stretching is not supported */
#define I2C_AQ_NO_CLK_STRETCH BIT(4)
/* /*
* i2c_adapter is the structure used to identify a physical i2c bus along * i2c_adapter is the structure used to identify a physical i2c bus along