linux-kernel - [PATCH 4.19 316/425] i2c: Add I2C_AQ_NO_REP

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Message-Id: <20210520092141.819465740@linuxfoundation.org>
Date:   Thu, 20 May 2021 11:21:25 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Wolfram Sang <wsa@...nel.org>,
        Bence Csókás <bence98@....bme.hu>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 316/425] i2c: Add I2C_AQ_NO_REP_START adapter quirk

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

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
-- 
2.30.2