netdev - Re: [PATCH net-next 5/5] net: dsa: felix: update regmap requests to be string-based

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Date:   Tue, 27 Sep 2022 13:28:40 -0700
From:   Colin Foster <colin.foster@...advantage.com>
To:     Vladimir Oltean <vladimir.oltean@....com>
Cc:     netdev@...r.kernel.org, Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        UNGLinuxDriver@...rochip.com,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Maxim Kochetkov <fido_max@...ox.ru>
Subject: Re: [PATCH net-next 5/5] net: dsa: felix: update regmap requests to
 be string-based

On Tue, Sep 27, 2022 at 10:15:21PM +0300, Vladimir Oltean wrote:
> +static struct regmap *felix_request_regmap_by_name(struct felix *felix,
> +						   const char *resource_name)
> +{
> +	struct ocelot *ocelot = &felix->ocelot;
> +	struct resource res;
> +	int i;
> +

I like it. And a simple:

if (!felix->resources)
    return dev_get_regmap(ocelot->dev->parent, resource_name);

here (with an appropriate comment) would be all I need in the MFD
scenario.


I'll share the names via macros for "reg", "ana", etc. by way of
linux/mfd/ocelot.h, unless you think felix / seville also want them.

Thanks Vladimir!

> +	for (i = 0; i < felix->info->num_resources; i++) {
> +		if (strcmp(resource_name, felix->info->resources[i].name))
> +			continue;
> +
> +		memcpy(&res, &felix->info->resources[i], sizeof(res));
> +		res.start += felix->switch_base;
> +		res.end += felix->switch_base;
> +
> +		return ocelot_regmap_init(ocelot, &res);
> +	}
> +
> +	return ERR_PTR(-ENOENT);
> +}