From mboxrd@z Thu Jan  1 00:00:00 1970
From: mark.langsdorf@calxeda.com (Mark Langsdorf)
Date: Mon, 05 Nov 2012 16:28:05 -0600
Subject: [PATCH 1/6 v2] arm: use devicetree to get smp_twd clock
In-Reply-To: <20121104100822.GY21164@n2100.arm.linux.org.uk>
References: <1351631056-25938-1-git-send-email-mark.langsdorf@calxeda.com>
 <1351882309-733-1-git-send-email-mark.langsdorf@calxeda.com>
 <1351882309-733-2-git-send-email-mark.langsdorf@calxeda.com>
 <20121104100822.GY21164@n2100.arm.linux.org.uk>
Message-ID: <50983D75.50009@calxeda.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On 11/04/2012 04:08 AM, Russell King - ARM Linux wrote:
> On Fri, Nov 02, 2012 at 01:51:44PM -0500, Mark Langsdorf wrote:
>> -static struct clk *twd_get_clock(void)
>> +static struct clk *twd_get_clock(struct device_node *np)
>>  {
>> -	struct clk *clk;
>> +	struct clk *clk = NULL;
>>  	int err;
>>  
>> -	clk = clk_get_sys("smp_twd", NULL);
>> +	if (np)
>> +		clk = of_clk_get(np, 0);
>> +	if (!clk)
> 
> What does a NULL return from of_clk_get() mean?  Where is this defined?

Well, it's a valid path if (np) is NULL. I'll add an IS_ERR(clk) and
resubmit.

>> @@ -349,6 +348,10 @@ int __init twd_local_timer_register(struct twd_local_timer *tlt)
>>  	if (!twd_base)
>>  		return -ENOMEM;
>>  
>> +	twd_clk = twd_get_clock(NULL);
>> +
>> +	twd_clk = twd_get_clock(NULL);
>> +
> 
> Why twice?

No good reason. I'll resubmit with it cleaned up. Thanks for the review.

--Mark Langsdorf
Calxeda, Inc.