linux-kernel - Re: [PATCH v3 5/6] iio: adc: ad7173: Add support for AD411x devices

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Date: Wed, 29 May 2024 15:59:54 -0500
From: David Lechner <dlechner@...libre.com>
To: "Ceclan, Dumitru" <mitrutzceclan@...il.com>,
 Nuno Sá <noname.nuno@...il.com>, dumitru.ceclan@...log.com
Cc: Lars-Peter Clausen <lars@...afoo.de>,
 Michael Hennerich <Michael.Hennerich@...log.com>,
 Jonathan Cameron <jic23@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, linux-iio@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 5/6] iio: adc: ad7173: Add support for AD411x devices

On 5/29/24 9:03 AM, Ceclan, Dumitru wrote:
> On 29/05/2024 15:46, Nuno Sá wrote:
>> On Mon, 2024-05-27 at 20:02 +0300, Dumitru Ceclan via B4 Relay wrote:
>>> From: Dumitru Ceclan <dumitru.ceclan@...log.com>
> 
> ...
> 
>>>  static const struct ad7173_device_info ad7173_device_info[] = {
>>> +	[ID_AD4111] = {
>>> +		.name = "ad4111",
>>> +		.id = AD7173_AD4111_AD4112_AD4114_ID,
>>> +		.num_voltage_inputs_with_divider = 8,
>>> +		.num_channels = 16,
>>> +		.num_configs = 8,
>>> +		.num_voltage_inputs = 8,
>>> +		.num_gpios = 2,
>>> +		.higher_gpio_bits = true,
>>> +		.has_temp = true,
>>> +		.has_vcom_input = true,
>>> +		.has_input_buf = true,
>>> +		.has_current_inputs = true,
>>> +		.has_int_ref = true,
>>> +		.clock = 2 * HZ_PER_MHZ,
>>> +		.sinc5_data_rates = ad7173_sinc5_data_rates,
>>> +		.num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
>>> +	},
>>
>> At some point it would be nice to drop the ad7173_device_info array...
>>
> What are good alternatives to this?

Drivers like ad7091r8 have individual static struct ad7091r_init_info
instead of putting them all in an array. I like doing it that
way because it makes less code to read compared to having the
array.

It would let us get rid of enum ad7173_ids, have one level less
indent on each static const struct ad7173_device_info and 

{ .compatible = "adi,ad7172-2", .data = &ad7173_device_info },

would now fit on one line since we no longer need the array
index.