linux-kernel - [PATCH] i2c: davinci: add I2C_FUNC_PROTOCOL

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Message-Id: <20250326-i2c-v1-1-82409ebe9f2b@gmail.com>
Date: Wed, 26 Mar 2025 15:39:47 +0100
From: Marcus Folkesson <marcus.folkesson@...il.com>
To: Bartosz Golaszewski <brgl@...ev.pl>, Andi Shyti <andi.shyti@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org, linux-i2c@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Marcus Folkesson <marcus.folkesson@...il.com>
Subject: [PATCH] i2c: davinci: add I2C_FUNC_PROTOCOL_MANGLING to feature
 list

The driver do support I2C_M_IGNORE_NAK, so add
I2C_FUNC_PROTOCOL_MANGLING to the feature list.

Signed-off-by: Marcus Folkesson <marcus.folkesson@...il.com>
---
The driver do support I2C_M_IGNORE_NAK, so the
I2C_FUNC_PROTOCOL_MANGLING bit should be set.

I2C_M_IGNORE_NAK is the only supported "mangling-feature" though, but
other i2c bus drivers also seems to support only a subset of available
mangling-features, so I guess this is ok.
---
 drivers/i2c/busses/i2c-davinci.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-davinci.c b/drivers/i2c/busses/i2c-davinci.c
index 6a909d339681214ed4f382b62f8cd924f4295e69..6a3d4e9e07f45ecc228943e877cde1fd9d72e8cb 100644
--- a/drivers/i2c/busses/i2c-davinci.c
+++ b/drivers/i2c/busses/i2c-davinci.c
@@ -551,7 +551,8 @@ i2c_davinci_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num)
 
 static u32 i2c_davinci_func(struct i2c_adapter *adap)
 {
-	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
+	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL |
+		I2C_FUNC_PROTOCOL_MANGLING;
 }
 
 static void terminate_read(struct davinci_i2c_dev *dev)

---
base-commit: 1e26c5e28ca5821a824e90dd359556f5e9e7b89f
change-id: 20250326-i2c-5561bf853f8d

Best regards,
-- 
Marcus Folkesson <marcus.folkesson@...il.com>