linux-kernel - Re: [RFC PATCH] of: base: add support to get machine model name

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Date:   Thu, 17 Nov 2016 14:50:13 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     Sudeep Holla <sudeep.holla@....com>, linux-kernel@...r.kernel.org,
        linux-mips@...ux-mips.org, devicetree@...r.kernel.org,
        linux-sh@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [RFC PATCH] of: base: add support to get machine model name

On Thursday, November 17, 2016 11:50:50 AM CET Sudeep Holla wrote:
> Currently platforms/drivers needing to get the machine model name are
> replicating the same snippet of code. In some case, the OF reference
> counting is either missing or incorrect.
> 
> This patch adds support to read the machine model name either using
> the "model" or the "compatible" property in the device tree root node.
> 
> Signed-off-by: Sudeep Holla <sudeep.holla@....com>

I like the idea. One small comment:

> +int of_machine_get_model_name(const char **model)
> +{
> +	int error;
> +	struct device_node *root;
> +
> +	root = of_find_node_by_path("/");
> +	if (!root)
> +		return -EINVAL;

The global of_root variable points ot this already, and is defined
in the same file, so I think we can just skip the lookup.

	Arnd