linux-kernel - Re: [PATCH 3/5] phy: miphy28lp: Provide support for the MiPHY28lp Generic PHY

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Date:	Thu, 14 Aug 2014 13:15:34 +0100
From:	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:	Gabriel FERNANDEZ <gabriel.fernandez@...com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Srinivas Kandagatla <srinivas.kandagatla@...il.com>,
	Maxime Coquelin <maxime.coquelin@...com>,
	Patrice Chotard <patrice.chotard@...com>,
	Russell King <linux@....linux.org.uk>,
	Kishon Vijay Abraham I <kishon@...com>,
	Grant Likely <grant.likely@...aro.org>
CC:	devicetree@...r.kernel.org,
	alexandre torgue <alexandre.torgue@...com>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Giuseppe Cavallaro <peppe.cavallaro@...com>,
	Gabriel Fernandez <gabriel.fernandez@...aro.org>,
	kernel@...inux.com
Subject: Re: [PATCH 3/5] phy: miphy28lp: Provide support for the MiPHY28lp
 Generic PHY

Hi Gabi,

I did not review the full patchset but this function caught my attention..

> +};
> +
> +static int miphy28lp_get_ressource_byname(struct device_node *child,
> +					  char *name, struct resource *res)
> +{

s/miphy28lp_get_ressource_byname/miphy28lp_get_resource_byname

> +	int index, ret = 0, count = 0;
> +	int reg_tuple_size;
> +	const __be32 *p;
> +
> +	reg_tuple_size = (of_n_addr_cells(child) +
> +			of_n_size_cells(child)) * sizeof(u32);
> +
> +	p = of_get_property(child, "reg", &count);
> +	if (count % reg_tuple_size != 0)
> +		ret = -EINVAL;
> +
> +	count /= reg_tuple_size;
> +
> +	for (index = 0; index < count; index++) {
> +		const char *rname = NULL;
> +
> +		ret = of_property_read_string_index(child, "reg-names",
> +						    index, &rname);
> +		if (!strcmp(name, rname))
> +			return of_address_to_resource(child, index, res);
> +	}
> +
> +	return 1;
This function looks bit complicated, can't we just use:

	index = of_property_match_string(np, "reg-names", rname);
	if (index < 0)
		return -ENODEV;

	return of_address_to_resource(child, index, res);



--srini
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