From: I Viswanath <viswanathiyyappan@gmail.com>
To: wsa+renesas@sang-engineering.com
Cc: linux-i2c@vger.kernel.org, viswanathiyyappan@gmail.com
Subject: [PATCH v3] i2c: Clarify behavior of I2C_M_RD flag
Date: Wed, 9 Jul 2025 20:37:18 +0530 [thread overview]
Message-ID: <20250709151402.7811-2-viswanathiyyappan@gmail.com> (raw)
In-Reply-To: <20250709151402.7811-1-viswanathiyyappan@gmail.com>
Update the description of I2C_M_RD to clarify that not setting it
signals a write transaction
Signed-off-by: I Viswanath <viswanathiyyappan@gmail.com>
---
include/uapi/linux/i2c.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/uapi/linux/i2c.h b/include/uapi/linux/i2c.h
index 92326ebde350..a2db2a56c8b0 100644
--- a/include/uapi/linux/i2c.h
+++ b/include/uapi/linux/i2c.h
@@ -21,7 +21,8 @@
*
* @flags:
* Supported by all adapters:
- * %I2C_M_RD: read data (from slave to master). Guaranteed to be 0x0001!
+ * %I2C_M_RD: read data (from slave to master). Guaranteed to be 0x0001! If
+ * not set, the transaction is interpreted as write.
*
* Optional:
* %I2C_M_DMA_SAFE: the buffer of this message is DMA safe. Makes only sense
--
2.49.0
next prev parent reply other threads:[~2025-07-09 15:14 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-10 21:27 [PATCH v2] i2c: Clarify behavior of I2C_M_RD flag Viswanath
2025-05-19 16:45 ` Wolfram Sang
2025-07-09 15:00 ` I Viswanath
2025-07-09 15:00 ` [PATCH v3] i2c: Clarify behavior of I2C_M_RD flag I Viswanath
2025-07-09 15:07 ` [PATCH v2] " I Viswanath
2025-07-09 15:07 ` I Viswanath [this message]
2025-07-14 7:17 ` [PATCH v3] " Wolfram Sang
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