linux-kernel - Re: [PATCH v1 4/4] mfd: intel-ehl: Introduce Intel Elkhart Lake PSE GPIO and TIO

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Message-ID: <Z78VIjgkzf_GlauU@smile.fi.intel.com>
Date: Wed, 26 Feb 2025 15:20:34 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Raag Jadav <raag.jadav@...el.com>
Cc: lee@...nel.org, giometti@...eenne.com, gregkh@...uxfoundation.org,
	raymond.tan@...el.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 4/4] mfd: intel-ehl: Introduce Intel Elkhart Lake PSE
 GPIO and TIO

On Wed, Feb 26, 2025 at 11:45:27AM +0530, Raag Jadav wrote:
> Intel Elkhart Lake Programmable Service Engine (PSE) includes two PCI
> devices that expose two different capabilities of GPIO and Timed I/O
> as a single PCI function through shared MMIO.

...

> +config MFD_INTEL_EHL_PSE_GPIO
> +	tristate "Intel Elkhart Lake PSE GPIO MFD"
> +	depends on PCI && (X86 || COMPILE_TEST)
> +	select MFD_CORE
> +	help
> +	  This MFD provides support for GPIO and TIO that exist on Intel
> +	  Elkhart Lake PSE as a single PCI device. It splits the two I/O
> +	  devices to their respective I/O drivers.

Can you add a module name here?

...

> +++ b/drivers/mfd/intel-ehl-gpio.c

We are usually align the file name and Kconfig option, and I like Kconfig
choice, so intel_ehl_pse_gpio.c (also note the style with other intel_$SOC_*
files in the folder.

...

> +#include <linux/array_size.h>
> +#include <linux/ioport.h>
> +#include <linux/mfd/core.h>
> +#include <linux/mod_devicetable.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/pci.h>

+ stddef.h // for NULL

...

> +	return mfd_add_devices(&pci->dev, PLATFORM_DEVID_AUTO, ehl_pse_gpio_devs,
> +			       ARRAY_SIZE(ehl_pse_gpio_devs), &pci->resource[0],

We have a helper pci_resource_n().

> +			       pci_irq_vector(pci, 0), NULL);

-- 
With Best Regards,
Andy Shevchenko