linux-kernel - Re: [PATCH 2/4] ACPI / PMIC: Add byt prefix to Crystal Cove PMIC OpRegion driver

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Date:   Fri, 25 Oct 2019 10:41:54 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Hans de Goede <hdegoede@...hat.com>
Cc:     "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>, Lee Jones <lee.jones@...aro.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4] ACPI / PMIC: Add byt prefix to Crystal Cove PMIC
 OpRegion driver

On Thu, Oct 24, 2019 at 11:38:25PM +0200, Hans de Goede wrote:
> Our current Crystal Cove OpRegion driver is only valid for the
> Crystal Cove PMIC variant found on Bay Trail (BYT) boards,
> Cherry Trail (CHT) based boards use another variant.
> 
> At least the regulator registers are different on CHT and these registers
> are one of the things controlled by the custom PMIC OpRegion.
> 
> Commit 4d9ed62ab142 ("mfd: intel_soc_pmic: Export separate mfd-cell
> configs for BYT and CHT") has disabled the intel_pmic_crc.c code for CHT
> devices by removing the "crystal_cove_pmic" MFD cell on CHT devices.
> 
> This commit renames the intel_pmic_crc.c driver and the cell to be
> prefixed with "byt" to indicate that this code is for BYT devices only.
> 
> This is a preparation patch for adding a separate PMIC OpRegion
> driver for the CHT variant of the Crystal Cove PMIC (sometimes called
> Crystal Cove Plus in Android kernel sources).

>  .../acpi/pmic/{intel_pmic_crc.c => intel_pmic_bytcrc.c}    | 4 ++--
>  drivers/mfd/intel_soc_pmic_crc.c                           | 2 +-

I would go with previously established pattern, i.e. intel_pmic_bytcc.c.

> +++ b/drivers/mfd/intel_soc_pmic_crc.c
> @@ -75,7 +75,7 @@ static struct mfd_cell crystal_cove_byt_dev[] = {
>  		.resources = gpio_resources,
>  	},
>  	{
> -		.name = "crystal_cove_pmic",
> +		.name = "byt_crystal_cove_pmic",
>  	},
>  	{
>  		.name = "crystal_cove_pwm",

I'm wondering shouldn't we rename the PWM and GPIO for the sake of consistency?
Yes, if a driver is used on both CHT and BYT, let it provide two names.

-- 
With Best Regards,
Andy Shevchenko