From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: "Bence Csókás" <bence98@sch.bme.hu>,
"Wolfram Sang" <wsa@kernel.org>,
"Sasha Levin" <sashal@kernel.org>,
linux-i2c@vger.kernel.org
Subject: [PATCH AUTOSEL 5.11 041/104] i2c: Add I2C_AQ_NO_REP_START adapter quirk
Date: Wed, 5 May 2021 12:33:10 -0400 [thread overview]
Message-ID: <20210505163413.3461611-41-sashal@kernel.org> (raw)
In-Reply-To: <20210505163413.3461611-1-sashal@kernel.org>
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(+)
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
--
2.30.2
next prev parent reply other threads:[~2021-05-05 16:46 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20210505163413.3461611-1-sashal@kernel.org>
2021-05-05 16:32 ` [PATCH AUTOSEL 5.11 018/104] i2c: bail out early when RDWR parameters are wrong Sasha Levin
2021-05-05 16:33 ` Sasha Levin [this message]
2021-05-05 16:33 ` [PATCH AUTOSEL 5.11 058/104] i2c: imx: Fix PM reference leak in i2c_imx_reg_slave() Sasha Levin
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