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[4.19,316/425] i2c: Add I2C_AQ_NO_REP_START adapter quirk

Message ID 20210520092141.819465740@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH May 20, 2021, 9:21 a.m. UTC 
From: Bence Csókás <bence98@sch.bme.hu>

[ Upstream commit aca01415e076aa96cca0f801f4420ee5c10c660d ]

This quirk signifies that the adapter cannot do a repeated
START, it always issues a STOP condition after transfers.

Suggested-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Bence Csókás <bence98@sch.bme.hu>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 include/linux/i2c.h | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 7e748648c7d3..6fda0458745d 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -662,6 +662,8 @@  struct i2c_adapter_quirks {
 #define I2C_AQ_NO_ZERO_LEN_READ		BIT(5)
 #define I2C_AQ_NO_ZERO_LEN_WRITE	BIT(6)
 #define I2C_AQ_NO_ZERO_LEN		(I2C_AQ_NO_ZERO_LEN_READ | I2C_AQ_NO_ZERO_LEN_WRITE)
+/* adapter cannot do repeated START */
+#define I2C_AQ_NO_REP_START		BIT(7)
 
 /*
  * i2c_adapter is the structure used to identify a physical i2c bus along