Re: [PATCH v1] staging: iio: hmc5843: Set iio name dynamically based on i2c name

[Lars-Peter Clausen <lars@metafoo.de>]

On 08/12/2015 10:20 AM, sdliyong@gmail.com wrote:
> From: Yong Li <sdliyong@gmail.com>
> 
> Load the driver using the below command:
> echo hmc5983 0x1e > /sys/bus/i2c/devices/i2c-?/new_device
> 
> In sysfs, the iio name is hmc5843, however the i2c name is hmc5983,
> they are inconsistent.
> 
> With this patch, the iio name will be the same as the i2c device name
> 
> Signed-off-by: Yong Li <sdliyong@gmail.com>
> ---
>  drivers/staging/iio/magnetometer/hmc5843_i2c.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/staging/iio/magnetometer/hmc5843_i2c.c b/drivers/staging/iio/magnetometer/hmc5843_i2c.c
> index ff08667..3b03644 100644
> --- a/drivers/staging/iio/magnetometer/hmc5843_i2c.c
> +++ b/drivers/staging/iio/magnetometer/hmc5843_i2c.c
> @@ -59,6 +59,7 @@ static const struct regmap_config hmc5843_i2c_regmap_config = {
>  static int hmc5843_i2c_probe(struct i2c_client *cli,
>  			     const struct i2c_device_id *id)
>  {
> +	cli->dev.driver->name = id->name;

You are overwriting a the name of the driver, which is a struct that is
shared between all instances of the device which specific data from one
device. That is most certainly not correct.

Update hmc5843_common_probe() and add a parameter that takes the name for
the device and then pass the id->name when the function is called.

>  	return hmc5843_common_probe(&cli->dev,
>  			devm_regmap_init_i2c(cli, &hmc5843_i2c_regmap_config),
>  			id->driver_data);
>