Force use of Omnivision's SCCB protocol and make sure the I2c adapter supports protocol mangling during probe. Testing done on SH4 Migo-R board. As commit: [e789029761503f0cce03e8767a56ae099b88e1bd] "i2c: sh_mobile: don't send a stop condition by default inside transfers" makes the i2c adapter emit a stop bit between messages in a single transfer only when explicitly required, the ov772x driver fails to probe due to i2c transfer timeout without SCCB flag set. i2c-sh_mobile i2c-sh_mobile.0: Transfer request timed out ov772x 0-0021: Product ID error 92:92 With this patch applied: soc-camera-pdrv soc-camera-pdrv.0: Probing soc-camera-pdrv.0 ov772x 0-0021: ov7725 Product ID 77:21 Manufacturer ID 7f:a2 Signed-off-by: Jacopo Mondi <jacopo@xxxxxxxxxx> --- drivers/media/i2c/soc_camera/ov772x.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/media/i2c/soc_camera/ov772x.c b/drivers/media/i2c/soc_camera/ov772x.c index 985a367..8a4b29e 100644 --- a/drivers/media/i2c/soc_camera/ov772x.c +++ b/drivers/media/i2c/soc_camera/ov772x.c @@ -1067,6 +1067,7 @@ static int ov772x_probe(struct i2c_client *client, "I2C-Adapter doesn't support I2C_FUNC_SMBUS_BYTE_DATA\n"); return -EIO; } + client->flags |= I2C_CLIENT_SCCB; priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL); if (!priv) -- 2.7.4
