From mboxrd@z Thu Jan  1 00:00:00 1970
From: grygorii.strashko@ti.com (Grygorii Strashko)
Date: Fri, 26 Sep 2014 19:40:40 +0300
Subject: [RFC PATCH 2/4] ARM: keystone: pm: switch to use generic pm
 domains
In-Reply-To: <7hlhp79w6p.fsf@deeprootsystems.com>
References: <1411657537-25238-1-git-send-email-grygorii.strashko@ti.com>	<1411657537-25238-3-git-send-email-grygorii.strashko@ti.com>
 <7hlhp79w6p.fsf@deeprootsystems.com>
Message-ID: <54259708.1030801@ti.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On 09/26/2014 01:23 AM, Kevin Hilman wrote:
> Grygorii Strashko <grygorii.strashko@ti.com> writes:
>
>> This patch switches Keystone 2 PM code to use Generic PM domains
>> instead of PM  clock domains because of the lack of DT support
>> for the last.
>>
>> Keystone 2 PM domain should be specified per device for which
>> Runtime PM has to be enabled and handles the list of functional clocks
>> to enable/disable device.
>>
>> Example:
>>   qmss_domain: qmss_pm_controller {
>> 	compatible = "ti,keystone-pm-controller";
>> 	clocks = <&chipclk13>;
>> 	#power-domain-cells = <0>;
>>   };
>>
>>   qmss: qmss at 2a40000 {
>> 	compatible = "ti,keystone-navigator-qmss";
>> 	...
>> 	power-domains = <&qmss_domain>;
>>
>> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
>
> [...]
>
>> +static int keystone_pm_domain_power_off(struct generic_pm_domain *genpd)
>> +{
>> +	int ret;
>> +	struct keystone_domain *dm = container_of(genpd,
>> +						  struct keystone_domain,
>> +						  base);
>> +
>> +	/* Enable reset clocks for all devices in the PU domain */
>
> This says enable clocks...
>
>> +	ret = pm_clk_suspend(dm->dev);
>
> ...but this calls clk_disable().
>
>> +	if (ret)
>> +		dev_err(dm->dev, "can't turn off clocks %d\n", ret);
>> +
>> +	return ret;
>> +}
>> +
>> +static int keystone_pm_domain_power_on(struct generic_pm_domain *genpd)
>> +{
>> +	int ret;
>> +	struct keystone_domain *dm = container_of(genpd,
>> +						  struct keystone_domain,
>> +						  base);
>> +
>> +	/* Disable reset clocks for all devices in the PU domain */
>
> And this says disable clocks...
>
>> +	ret = pm_clk_resume(dm->dev);
>
> ...but this calls clk_enable().
>
> -ECONFUSED.
>

Will update.

Thanks you for comments.

Regards,
-grygorii