[PATCH] extcon: arizona: Disable mic detect if running when driver is removed

[PATCH] extcon: arizona: Disable mic detect if running when driver is removed

[Charles Keepax]

Microphone detection provides the button detection features on the
Arizona CODECs as such it will be running if the jack is currently
inserted. If the driver is unbound whilst the jack is still inserted
this will cause warnings from the regulator framework as the MICVDD
regulator is put but was never disabled.

Correct this by disabling microphone detection on driver removal and if
the microphone detection was running disable the regulator and put the
runtime reference that was currently held.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
---
 drivers/extcon/extcon-arizona.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index da0e9bc4262fa..9327479c719c2 100644
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -1726,6 +1726,16 @@ static int arizona_extcon_remove(struct platform_device *pdev)
 	struct arizona_extcon_info *info = platform_get_drvdata(pdev);
 	struct arizona *arizona = info->arizona;
 	int jack_irq_rise, jack_irq_fall;
+	bool change;
+
+	regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
+				 ARIZONA_MICD_ENA, 0,
+				 &change);
+
+	if (change) {
+		regulator_disable(info->micvdd);
+		pm_runtime_put(info->dev);
+	}
 
 	gpiod_put(info->micd_pol_gpio);
 
-- 
2.11.0

Re: [PATCH] extcon: arizona: Disable mic detect if running when driver is removed

[Chanwoo Choi]

Hi Charles,

On 19. 4. 5. 오전 1:33, Charles Keepax wrote:
> Microphone detection provides the button detection features on the
> Arizona CODECs as such it will be running if the jack is currently
> inserted. If the driver is unbound whilst the jack is still inserted
> this will cause warnings from the regulator framework as the MICVDD
> regulator is put but was never disabled.
> 
> Correct this by disabling microphone detection on driver removal and if
> the microphone detection was running disable the regulator and put the
> runtime reference that was currently held.
> 
> Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
> ---
>  drivers/extcon/extcon-arizona.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
> index da0e9bc4262fa..9327479c719c2 100644
> --- a/drivers/extcon/extcon-arizona.c
> +++ b/drivers/extcon/extcon-arizona.c
> @@ -1726,6 +1726,16 @@ static int arizona_extcon_remove(struct platform_device *pdev)
>  	struct arizona_extcon_info *info = platform_get_drvdata(pdev);
>  	struct arizona *arizona = info->arizona;
>  	int jack_irq_rise, jack_irq_fall;
> +	bool change;
> +
> +	regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
> +				 ARIZONA_MICD_ENA, 0,
> +				 &change);
> +
> +	if (change) {
> +		regulator_disable(info->micvdd);
> +		pm_runtime_put(info->dev);
> +	}>  
>  	gpiod_put(info->micd_pol_gpio);
>  
> 

Applied it.


IMO, I think that this driver have to handle the exception handling
when regmap_update_bits_check() returns error or 'change' value
is not changed. This driver have same issue about exception handling
on multiple places. Please take it on separate patche.

-- 
Best Regards,
Chanwoo Choi
Samsung Electronics