linux-kernel - Re: [PATCH v1 14/43] power: reset: Add a driver for the ep93xx reset

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Date:   Sat, 3 Jun 2023 23:24:54 +0300
From:   andy.shevchenko@...il.com
To:     Nikita Shubin <nikita.shubin@...uefel.me>
Cc:     Alexander Sverdlin <alexander.sverdlin@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Sebastian Reichel <sre@...nel.org>,
        Michael Peters <mpeters@...eddedts.com>,
        Kris Bahnsen <kris@...eddedts.com>,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Subject: Re: [PATCH v1 14/43] power: reset: Add a driver for the ep93xx reset

Thu, Jun 01, 2023 at 08:34:05AM +0300, Nikita Shubin kirjoitti:
> Implement the reset behaviour of the various EP93xx SoCS in drivers/power/reset.
> 
> It used to be located in arch/arm/mach-ep93xx.

...

> +config POWER_RESET_EP93XX
> +	bool "Cirrus EP93XX reset driver" if COMPILE_TEST

Can you elaborate this construction, please?

> +	depends on MFD_SYSCON
> +	default ARCH_EP93XX
> +	help
> +	  This driver provides restart support for Cirrus EP93XX SoC.
> +
> +	  Say Y here if you have a Cirrus EP93XX SoC and you wish
> +	  to have restart support.

...

Missing bits.h

> +#include <linux/delay.h>
> +#include <linux/notifier.h>

> +#include <linux/of_device.h>

Wrong header. One is mod_devicetable.h, dunno what other implicit dependencies
you have in mind when added this.

> +#include <linux/platform_device.h>
> +#include <linux/reboot.h>

> +#include <linux/soc/cirrus/ep93xx.h>

...

> +	struct notifier_block *res_han;
> +	struct device *dev = &pdev->dev;

Longer lines first?

> +	int err;
> +
> +	res_han = devm_kzalloc(&pdev->dev, sizeof(*res_han), GFP_KERNEL);

You have dev, use it.

> +	if (!res_han)
> +		return -ENOMEM;

...

> +	err = register_restart_handler(res_han);
> +	if (err)
> +		dev_err(dev, "can't register restart notifier (err=%d)\n", err);

		return dev_err_probe(...);

> +	return err;
> +}

-- 
With Best Regards,
Andy Shevchenko