linux-kernel - Re: [PATCH 17/57] power: ab8500_bm: Added support for BATT

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Message-ID: <5065EB75.8040101@linaro.org>
Date:	Fri, 28 Sep 2012 12:24:53 -0600
From:	Mathieu Poirier <mathieu.poirier@...aro.org>
To:	Anton Vorontsov <anton.vorontsov@...aro.org>
CC:	linux-kernel@...r.kernel.org, dwmw2@...radead.org
Subject: Re: [PATCH 17/57] power: ab8500_bm: Added support for BATT_OVV

On 12-09-26 09:36 PM, Anton Vorontsov wrote:
> On Tue, Sep 25, 2012 at 10:12:14AM -0600, mathieu.poirier@...aro.org wrote:
>> From: Hakan Berg <hakan.berg@...ricsson.com>
>>
>> Add support for the battery over-voltage situation
>>
>> Signed-off-by: Hakan Berg <hakan.berg@...ricsson.com>
>> Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
>> Reviewed-by: Karl KOMIEROWSKI <karl.komierowski@...ricsson.com>
>> ---
>>  drivers/power/ab8500_fg.c |   32 ++++++++++++++++----------------
>>  1 files changed, 16 insertions(+), 16 deletions(-)
>>
>> diff --git a/drivers/power/ab8500_fg.c b/drivers/power/ab8500_fg.c
>> index c4d9307..8507254 100644
>> --- a/drivers/power/ab8500_fg.c
>> +++ b/drivers/power/ab8500_fg.c
>> @@ -1842,24 +1842,26 @@ static void ab8500_fg_check_hw_failure_work(struct work_struct *work)
>>  	 * If we have had a battery over-voltage situation,
>>  	 * check ovv-bit to see if it should be reset.
>>  	 */
>> -	if (di->flags.bat_ovv) {
>> -		ret = abx500_get_register_interruptible(di->dev,
>> -			AB8500_CHARGER, AB8500_CH_STAT_REG,
>> -			&reg_value);
>> -		if (ret < 0) {
>> -			dev_err(di->dev, "%s ab8500 read failed\n", __func__);
>> -			return;
>> -		}
>> -		if ((reg_value & BATT_OVV) != BATT_OVV) {
>> -			dev_dbg(di->dev, "Battery recovered from OVV\n");
>> -			di->flags.bat_ovv = false;
>> +	ret = abx500_get_register_interruptible(di->dev,
>> +		AB8500_CHARGER, AB8500_CH_STAT_REG,
>> +		&reg_value);
>> +	if (ret < 0) {
>> +		dev_err(di->dev, "%s ab8500 read failed\n", __func__);
>> +		return;
>> +	}
>> +	if ((reg_value & BATT_OVV) == BATT_OVV) {
>> +		if (!di->flags.bat_ovv) {
>> +			dev_dbg(di->dev, "Battery OVV\n");
>> +			di->flags.bat_ovv = true;
>>  			power_supply_changed(&di->fg_psy);
>> -			return;
>>  		}
>> -
>>  		/* Not yet recovered from ovv, reschedule this test */
>>  		queue_delayed_work(di->fg_wq, &di->fg_check_hw_failure_work,
>> -				   round_jiffies(HZ));
>> +			HZ);
> 
> Why this change? I.e. round_jiffies(HZ) -> HZ?
> 
> Yes, it seems like round_jiffies(HZ) is not needed since HZ itself is a
> full second.. But the change itself does not belong to this patch.

I agree with your point of view.  How do we fix it now ?  Do you think
it's worth crafting a one-line patch ?

> 
>> +		} else {
>> +			dev_dbg(di->dev, "Battery recovered from OVV\n");
>> +			di->flags.bat_ovv = false;
>> +			power_supply_changed(&di->fg_psy);
>>  	}
>>  }
>>  
>> @@ -2039,8 +2041,6 @@ static irqreturn_t ab8500_fg_batt_ovv_handler(int irq, void *_di)
>>  	struct ab8500_fg *di = _di;
>>  
>>  	dev_dbg(di->dev, "Battery OVV\n");
>> -	di->flags.bat_ovv = true;
>> -	power_supply_changed(&di->fg_psy);
>>  
>>  	/* Schedule a new HW failure check */
>>  	queue_delayed_work(di->fg_wq, &di->fg_check_hw_failure_work, 0);
>> -- 
>> 1.7.5.4

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