extcon: arizona: Allow configuration of MICBIAS rise time

Allow configuration of the rise time for MICBIAS via platform data, the
delay required depends on things like the external component selection.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>

2 files changed, 9 insertions, 0 deletions

diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index 9e1d104803e7..635b7078ce5e 100644
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -417,6 +417,12 @@ static int arizona_extcon_probe(struct platform_device *pdev)
                 }
         }
 
+        if (arizona->pdata.micd_bias_start_time)
+                regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
+                                   ARIZONA_MICD_BIAS_STARTTIME_MASK,
+                                   arizona->pdata.micd_bias_start_time
+                                   << ARIZONA_MICD_BIAS_STARTTIME_SHIFT);
+
         arizona_extcon_set_mode(info, 0);
 
         info->input = devm_input_allocate_device(&pdev->dev);
diff --git a/include/linux/mfd/arizona/pdata.h b/include/linux/mfd/arizona/pdata.h
index 8b1d1daaae16..5b0508853290 100644
--- a/include/linux/mfd/arizona/pdata.h
+++ b/include/linux/mfd/arizona/pdata.h
@@ -99,6 +99,9 @@ struct arizona_pdata {
         /** GPIO for mic detection polarity */
         int micd_pol_gpio;
 
+        /** Mic detect ramp rate */
+        int micd_bias_start_time;
+
         /** Headset polarity configurations */
         struct arizona_micd_config *micd_configs;
         int num_micd_configs;