linux-kernel - Re: [PATCHv6 4/4] ARM: mx51: Add support for low power suspend on MX51

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Message-ID: <20110325073054.GE7285@pengutronix.de>
Date:	Fri, 25 Mar 2011 08:30:54 +0100
From:	Sascha Hauer <s.hauer@...gutronix.de>
To:	Dinh.Nguyen@...escale.com
Cc:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux@....linux.org.uk, u.kleine-koenig@...gutronix.de,
	arnaud.patard@...-net.org, ra5478@...escale.com,
	xiao-lizhang@...escale.com, festevam@...il.com
Subject: Re: [PATCHv6 4/4] ARM: mx51: Add support for low power suspend on
 MX51

On Wed, Mar 23, 2011 at 04:27:56PM -0500, Dinh.Nguyen@...escale.com wrote:
> From: Dinh Nguyen <Dinh.Nguyen@...escale.com>
> 
> Adds initial low power suspend functionality to MX51.
> Supports "mem" and "standby" modes.
> 
> +
> +static int __init mx5_pm_init(void)
> +{
> +	if (gpc_dvfs_clk == NULL)
> +		gpc_dvfs_clk = clk_get(NULL, "gpc_dvfs");
> +
> +	if (!IS_ERR(gpc_dvfs_clk)) {
> +		if (cpu_is_mx51())
> +			suspend_set_ops(&mx5_suspend_ops);
> +	} else {
> +		printk(KERN_ERR "Cannot enter SRPG suspend -no gpc_dvfs clock!\n");
> +		return -EPERM;

This will print a warning on every non i.MX51 machine, not a good idea.
Please just bail out early on irrelevant machines.

Sascha

> +	}
> +
> +	return 0;
> +}
> +device_initcall(mx5_pm_init);
> -- 
> 1.6.0.4
> 
> 
> 

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