linux-kernel - Re: [RFC PATCH 6/6] ARM: OMAP3: Enable Hardware Save and Restore for USB Host

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Date:	Thu, 20 Jun 2013 15:42:08 +0300
From:	Roger Quadros <rogerq@...com>
To:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
CC:	<stern@...land.harvard.edu>, <tony@...mide.com>, <balbi@...com>,
	<ruslan.bilovol@...com>, <linux-usb@...r.kernel.org>,
	<linux-omap@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [RFC PATCH 6/6] ARM: OMAP3: Enable Hardware Save and Restore
 for USB Host

On 06/19/2013 08:30 PM, Sergei Shtylyov wrote:
> Hello.
> 
> On 06/19/2013 06:05 PM, Roger Quadros wrote:
> 
>> To ensure hardware context is restored while resuming from
>> OFF mode we need to enable the Hardware SAR bit for the
>> USB Host power domain.
> 
>> Signed-off-by: Roger Quadros <rogerq@...com>
>> ---
>>   arch/arm/mach-omap2/powerdomains3xxx_data.c |    8 +-------
>>   1 files changed, 1 insertions(+), 7 deletions(-)
> 
>> diff --git a/arch/arm/mach-omap2/powerdomains3xxx_data.c b/arch/arm/mach-omap2/powerdomains3xxx_data.c
>> index f0e14e9..9554d2b 100644
>> --- a/arch/arm/mach-omap2/powerdomains3xxx_data.c
>> +++ b/arch/arm/mach-omap2/powerdomains3xxx_data.c
>> @@ -289,13 +289,7 @@ static struct powerdomain usbhost_pwrdm = {
>>       .prcm_offs      = OMAP3430ES2_USBHOST_MOD,
>>       .pwrsts          = PWRSTS_OFF_RET_ON,
>>       .pwrsts_logic_ret = PWRSTS_RET,
>> -    /*
>> -     * REVISIT: Enabling usb host save and restore mechanism seems to
>> -     * leave the usb host domain permanently in ACTIVE mode after
>> -     * changing the usb host power domain state from OFF to active once.
>> -     * Disabling for now.
>> -     */
>> -    /*.flags      = PWRDM_HAS_HDWR_SAR,*/ /* for USBHOST ctrlr only */
>> +    .flags      = PWRDM_HAS_HDWR_SAR, /* for USBHOST ctrlr only */
> 
>    Looks like you're not indenting = right, in accordance to the other fields...

Will fix. Thanks.

cheers,
-roger
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