linux-kernel - [PATCH v4 1/2] i2c: Add I2C_AQ_NO_REP

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Message-ID: <20210331191921.1066172-2-bence98@sch.bme.hu>
Date:   Wed, 31 Mar 2021 19:19:20 +0000
From:   Bence Csókás <bence98@....bme.hu>
To:     <linux-i2c@...r.kernel.org>
CC:     Bence Csókás <bence98@....bme.hu>,
        <linux-kernel@...r.kernel.org>, Wolfram Sang <wsa@...-dreams.de>
Subject: [PATCH v4 1/2] i2c: Add I2C_AQ_NO_REP_START adapter quirk

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

Suggested-by: Wolfram Sang <wsa@...-dreams.de>
Signed-off-by: Bence Csókás <bence98@....bme.hu>
---
 include/linux/i2c.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 56622658b215..a670ae129f4b 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -687,6 +687,8 @@ 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
-- 
2.31.0