Re: [PATCH] extcon: max77693: Fix a bug occured at changing ADC debounce time.

jonghwa3.lee
2014-09-03T06:39:08Z

On 2014년 09월 03일 14:55, Chanwoo Choi wrote:

> On 09/03/2014 02:50 PM, Jonghwa Lee wrote:
>> When it writes some value other than 0 to BTLDset and JIGset, muic device
>> will be reset automatically. And it happens during updating ADC debounce time,
>> because it shares same register. To update ADC debounce time without reset,
>> set value only to ADCDbset and 0 to BTLDset and JIGset.
>>
>> Signed-off-by: Jonghwa Lee <jonghwa3.lee@samsung.com>
>> ---
>> drivers/extcon/extcon-max77693.c | 11 ++++++++---
>> 1 file changed, 8 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/extcon/extcon-max77693.c b/drivers/extcon/extcon-max77693.c
>> index 77460f2..661a3bb 100644
>> --- a/drivers/extcon/extcon-max77693.c
>> +++ b/drivers/extcon/extcon-max77693.c
>> @@ -255,10 +255,15 @@ static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
>> case ADC_DEBOUNCE_TIME_10MS:
>> case ADC_DEBOUNCE_TIME_25MS:
>> case ADC_DEBOUNCE_TIME_38_62MS:
>> - ret = regmap_update_bits(info->max77693->regmap_muic,
>> + /*
>> + * Don't touch BTLDset, JIGset when you want to change adc
>> + * debounce time. BTLDset, JIGset reflects actual pin status
>> + * and are not configurable.
>> + */
>> + ret = regmap_write_bits(info->max77693->regmap_muic,
>> MAX77693_MUIC_REG_CTRL3,
>> - CONTROL3_ADCDBSET_MASK,
>> - time << CONTROL3_ADCDBSET_SHIFT);
>> + (CONTROL3_ADCDBSET_MASK &
>> + time << CONTROL3_ADCDBSET_SHIFT));
>
> Do you make this patch on extcon-next branch?
>
> The max77693_muic_set_debounce_time() of extcon-max77693.c
> use regmap_update_bits instead of regmap_write_bits as following:

This patch intends to use 'regmap_write_bits()' not 'regmap_update_bits()'.
With using regmap_update_bits(), it would writes some value to BTLDset and
JIGset then muic device will loose current state.

Thanks,
Jonghwa

>
> switch (time) {
> case ADC_DEBOUNCE_TIME_5MS:
> case ADC_DEBOUNCE_TIME_10MS:
> case ADC_DEBOUNCE_TIME_25MS:
> case ADC_DEBOUNCE_TIME_38_62MS:
> ret = regmap_update_bits(info->max77693->regmap_muic,
> MAX77693_MUIC_REG_CTRL3,
> CONTROL3_ADCDBSET_MASK,
> time << CONTROL3_ADCDBSET_SHIFT);
> if (ret) {
> dev_err(info->dev, "failed to set ADC debounce time\n");
> return ret;
> }
>
>
> Thanks,
> Chanwoo Choi
>
>
>