linux-kernel - Re: [PATCH 2/3] iio: adc: ti-ads7950: Drop "ti-" prefix from module name

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Message-ID: <4dd9883a-5e50-36a9-135c-802dac4f93b8@kernel.org>
Date:   Sat, 14 Jan 2017 12:49:51 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     David Lechner <david@...hnology.com>, devicetree@...r.kernel.org,
        linux-iio@...r.kernel.org
Cc:     Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] iio: adc: ti-ads7950: Drop "ti-" prefix from module
 name

On 11/01/17 17:52, David Lechner wrote:
> This drops the "ti-" prefix from the module name. It makes the module name
> consistent with other iio ti-ads* drivers and it makes the driver work
> with device tree (the spi subsystem drops the "ti," prefix when matching
> compatible strings from device tree).
> 
> Tested working on LEGO MINDSTORMS EV3 with the following device tree node:
> 
> 	adc@3 {
> 		compatible = "ti,ads7957";
> 		reg = <3>;
> 		#io-channel-cells = <1>;
> 		spi-max-frequency = <10000000>;
> 		vref-supply = <&adc_ref>;
> 	};
> 
> Signed-off-by: David Lechner <david@...hnology.com>
What worries me here is that we might break existing setups.  I agree
we should have gotten this 'right' in the first place, but can we fix
it now.  Not so sure. We'd be better off perhaps adding an of_device_id
table with the write entries for device tree.
> ---
>  drivers/iio/adc/ti-ads7950.c | 26 +++++++++++++-------------
>  1 file changed, 13 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/iio/adc/ti-ads7950.c b/drivers/iio/adc/ti-ads7950.c
> index 0330361..b587fa6 100644
> --- a/drivers/iio/adc/ti-ads7950.c
> +++ b/drivers/iio/adc/ti-ads7950.c
> @@ -459,25 +459,25 @@ static int ti_ads7950_remove(struct spi_device *spi)
>  }
>  
>  static const struct spi_device_id ti_ads7950_id[] = {
> -	{"ti-ads7950", TI_ADS7950},
> -	{"ti-ads7951", TI_ADS7951},
> -	{"ti-ads7952", TI_ADS7952},
> -	{"ti-ads7953", TI_ADS7953},
> -	{"ti-ads7954", TI_ADS7954},
> -	{"ti-ads7955", TI_ADS7955},
> -	{"ti-ads7956", TI_ADS7956},
> -	{"ti-ads7957", TI_ADS7957},
> -	{"ti-ads7958", TI_ADS7958},
> -	{"ti-ads7959", TI_ADS7959},
> -	{"ti-ads7960", TI_ADS7960},
> -	{"ti-ads7961", TI_ADS7961},
> +	{ "ads7950", TI_ADS7950 },
> +	{ "ads7951", TI_ADS7951 },
> +	{ "ads7952", TI_ADS7952 },
> +	{ "ads7953", TI_ADS7953 },
> +	{ "ads7954", TI_ADS7954 },
> +	{ "ads7955", TI_ADS7955 },
> +	{ "ads7956", TI_ADS7956 },
> +	{ "ads7957", TI_ADS7957 },
> +	{ "ads7958", TI_ADS7958 },
> +	{ "ads7959", TI_ADS7959 },
> +	{ "ads7960", TI_ADS7960 },
> +	{ "ads7961", TI_ADS7961 },
>  	{ }
>  };
>  MODULE_DEVICE_TABLE(spi, ti_ads7950_id);
>  
>  static struct spi_driver ti_ads7950_driver = {
>  	.driver = {
> -		.name	= "ti-ads7950",
> +		.name	= "ads7950",
>  	},
>  	.probe		= ti_ads7950_probe,
>  	.remove		= ti_ads7950_remove,
>