linux-kernel - Re:Re: [PATCH] rtc: pm8xxx: clear alarm register when alarm is not enabled

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Date:   Sat, 21 Mar 2020 21:53:08 +0800 (GMT+08:00)
From:   韩科才 <hankecai@...o.com>
To:     "alexandre.belloni" <alexandre.belloni@...tlin.com>
Cc:     "a.zummo" <a.zummo@...ertech.it>,
        linux-rtc <linux-rtc@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        trivial <trivial@...nel.org>, kernel <kernel@...o.com>
Subject: Re:Re: [PATCH] rtc: pm8xxx: clear alarm register when alarm is not enabled

Hi,
It's the same as https://patchwork.ozlabs.org/patch/1257381/, so both commit is fine.

thanks


发件人：Alexandre Belloni <alexandre.belloni@...tlin.com>
发送日期：2020-03-21 21:21:25
收件人："韩科才" <hankecai@...o.com>
抄送人：a.zummo@...ertech.it,linux-rtc@...r.kernel.org,linux-kernel@...r.kernel.org,trivial@...nel.org,kernel@...o.com
主题：Re: [PATCH] rtc: pm8xxx: clear alarm register when alarm is not enabled>Hi,
>
>Isn't that the same as:
>https://patchwork.ozlabs.org/patch/1257381/ ?
>
>On 21/03/2020 19:50:17+0800, 韩科才 wrote:
>> Clear alarm register when alarm is not enabled otherwise the consumer
>> may still start alarm timer if it find the alarm register is not zero.
>> 
>> Signed-off-by: hankecai <hankecai@...o.com>
>> ---
>>  drivers/rtc/rtc-pm8xxx.c | 11 +++++++++++
>>  1 file changed, 11 insertions(+)
>> 
>> diff --git a/drivers/rtc/rtc-pm8xxx.c b/drivers/rtc/rtc-pm8xxx.c
>> index 07ea1be3abb9..3fa5416ad90d 100644
>> --- a/drivers/rtc/rtc-pm8xxx.c
>> +++ b/drivers/rtc/rtc-pm8xxx.c
>> @@ -301,6 +301,7 @@ static int pm8xxx_rtc_alarm_irq_enable(struct device *dev, unsigned int enable)
>>  	struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev);
>>  	const struct pm8xxx_rtc_regs *regs = rtc_dd->regs;
>>  	unsigned int ctrl_reg;
>> +	u8 value[NUM_8_BIT_RTC_REGS] = {0};
>>  
>>  	spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags);
>>  
>> @@ -319,6 +320,16 @@ static int pm8xxx_rtc_alarm_irq_enable(struct device *dev, unsigned int enable)
>>  		goto rtc_rw_fail;
>>  	}
>>  
>> +	/* Clear Alarm register */
>> +	if (!enable) {
>> +		rc = regmap_bulk_write(rtc_dd->regmap, regs->alarm_rw, value,
>> +				sizeof(value));
>> +		if (rc) {
>> +			dev_err(dev, "Clear RTC ALARM register failed\n");
>> +			goto rtc_rw_fail;
>> +		}
>> +	}
>> +
>>  rtc_rw_fail:
>>  	spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags);
>>  	return rc;
>> -- 
>> 2.21.0
>> 
>> 
>> 
>
>-- 
>Alexandre Belloni, Bootlin
>Embedded Linux and Kernel engineering
>https://bootlin.com