linux-kernel - Re: [PATCH v2 2/4] pinctrl: amd: Use amd_pinconf

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Date:   Thu, 6 Jul 2023 12:16:25 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Mario Limonciello <mario.limonciello@....com>
Cc:     Natikar Basavaraj <Basavaraj.Natikar@....com>,
        S-k Shyam-sundar <Shyam-sundar.S-k@....com>,
        linus.walleij@...aro.org, npliashechnikov@...il.com,
        nmschulte@...il.com, friedrich.vock@....de, dridri85@...il.com,
        Hans de Goede <hdegoede@...hat.com>,
        open list <linux-kernel@...r.kernel.org>,
        open list <linux-gpio@...r.kernel.org>
Subject: Re: [PATCH v2 2/4] pinctrl: amd: Use amd_pinconf_set() for all
 config options

On Wed, Jul 05, 2023 at 08:30:03AM -0500, Mario Limonciello wrote:
> On ASUS TUF A16 it is reported that the ITE5570 ACPI device connected to
> GPIO 7 is causing an interrupt storm.  This issue doesn't happen on
> Windows.
> 
> Comparing the GPIO register configuration between Windows and Linux
> bit 20 has been configured as a pull up on Windows, but not on Linux.
> Checking GPIO declaration from the firmware it is clear it *should* have
> been a pull up on Linux as well.
> 
> ```
> GpioInt (Level, ActiveLow, Exclusive, PullUp, 0x0000,
> 	 "\\_SB.GPIO", 0x00, ResourceConsumer, ,)
> {   // Pin list
> 0x0007
> }
> ```
> 
> On Linux amd_gpio_set_config() is currently only used for programming
> the debounce. Actually the GPIO core calls it with all the arguments
> that are supported by a GPIO, pinctrl-amd just responds `-ENOTSUPP`.
> 
> To solve this issue expand amd_gpio_set_config() to support the other
> arguments amd_pinconf_set() supports, namely `PIN_CONFIG_BIAS_PULL_DOWN`,
> `PIN_CONFIG_BIAS_PULL_UP`, and `PIN_CONFIG_DRIVE_STRENGTH`.

...

> @@ -782,7 +770,7 @@ static int amd_pinconf_get(struct pinctrl_dev *pctldev,
>  }
>  
>  static int amd_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
> -				unsigned long *configs, unsigned num_configs)
> +			   unsigned long *configs, unsigned int num_configs)

Seems like a stray change.

>  {
>  	int i;
>  	u32 arg;

Otherwise entire series looks good to me,
Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

-- 
With Best Regards,
Andy Shevchenko