linux-kernel - Re: [PATCH V2 3/3] reset: hi6220: Reset driver for hisilicon hi6220 SoC

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Date:	Fri, 11 Sep 2015 10:41:24 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Chen Feng <puck.chen@...ilicon.com>
Cc:	p.zabel@...gutronix.de, linux-kernel@...r.kernel.org,
	robh+dt@...nel.org, pawel.moll@....com, xuwei5@...ilicon.com,
	haojian.zhuang@...aro.org, zhangfei.gao@...mail.com,
	xuyiping@...ilicon.com, bintian.wang@...wei.com,
	devicetree@...r.kernel.org, dan.zhao@...ilicon.com,
	suzhuangluan@...ilicon.com, w.f@...wei.com
Subject: Re: [PATCH V2 3/3] reset: hi6220: Reset driver for hisilicon hi6220 SoC

On Friday 11 September 2015 16:18:38 Chen Feng wrote:
> +static int __init hi6220_reset_init(void)
> +{
> +	int ret;
> +	struct device_node *np;
> +	struct hi6220_reset_data *data;
> +
> +	data = kzalloc(sizeof(*data), GFP_KERNEL);
> +	if (!data)
> +		return -ENOMEM;
> +
> +	np = of_find_compatible_node(NULL, NULL, "hisilicon,hi6220_reset_ctl");
> +	if (!np) {
> +		ret = -ENXIO;
> +		goto err_alloc;
> +	}

Why is this not a platform driver?

> +	if (IS_ENABLED(CONFIG_RESET_CONTROLLER))
> +		reset_controller_register(&data->rc_dev);
> +
> +	return 0;

The Kconfig symbol already depends on RESET_CONTROLLER, so
the IS_ENABLED() check looks redundant.

	Arnd
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