On Fri, May 25, 2018 at 05:55:35PM +0800, bingbu.cao@xxxxxxxxx wrote:
> +static int ak7375_i2c_write(struct ak7375_device *ak7375,
> + u8 addr, u16 data, int size)
> +{
> + struct i2c_client *client = v4l2_get_subdevdata(&ak7375->sd);
> + int ret;
> + u8 buf[3];
> +
> + if (size != 1 && size != 2)
> + return -EINVAL;
> + buf[0] = addr;
> + buf[2] = data & 0xff;
> + if (size == 2)
> + buf[1] = data >> 8;
> + ret = i2c_master_send(client, (const char *)buf, size + 1);
I don't have a data datasheet for this thing, but it looks like buf[1] will
be undefined for writes the size of which is 1. And this what appears to be
written to the device as well...
> + if (ret < 0)
> + return ret;
> + if (ret != size + 1)
> + return -EIO;
> + return 0;
> +}
--
Sakari Ailus
sakari.ailus@xxxxxxxxxxxxxxx
