extcon: arizona: Use microphone clamp function if available

Newer Arizona devices include a microphone clamp function which is tied to
jack detect. Activate this feature when present in order to ensure best
performance of the subsystem.

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

1 files changed, 19 insertions, 0 deletions

diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index 635b7078ce5e..3ef3bee7d1e6 100644
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -45,6 +45,7 @@ struct arizona_extcon_info {
         int micd_num_modes;
 
         bool micd_reva;
+        bool micd_clamp;
 
         bool mic;
         bool detecting;
@@ -375,6 +376,7 @@ static int arizona_extcon_probe(struct platform_device *pdev)
                         info->micd_reva = true;
                         break;
                 default:
+                        info->micd_clamp = true;
                         break;
                 }
                 break;
@@ -423,6 +425,19 @@ static int arizona_extcon_probe(struct platform_device *pdev)
                                    arizona->pdata.micd_bias_start_time
                                    << ARIZONA_MICD_BIAS_STARTTIME_SHIFT);
 
+        /*
+         * If we have a clamp use it.
+         */
+        if (info->micd_clamp) {
+                regmap_update_bits(arizona->regmap,
+                                   ARIZONA_MICD_CLAMP_CONTROL,
+                                   ARIZONA_MICD_CLAMP_MODE_MASK, 4);
+                regmap_update_bits(arizona->regmap,
+                                   ARIZONA_JACK_DETECT_DEBOUNCE,
+                                   ARIZONA_MICD_CLAMP_DB,
+                                   ARIZONA_MICD_CLAMP_DB);
+        }
+
         arizona_extcon_set_mode(info, 0);
 
         info->input = devm_input_allocate_device(&pdev->dev);
@@ -529,6 +544,10 @@ static int arizona_extcon_remove(struct platform_device *pdev)
 
         pm_runtime_disable(&pdev->dev);
 
+        regmap_update_bits(arizona->regmap,
+                           ARIZONA_MICD_CLAMP_CONTROL,
+                           ARIZONA_MICD_CLAMP_MODE_MASK, 0);
+
         arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 0);
         arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 0);
         arizona_free_irq(arizona, ARIZONA_IRQ_MICDET, info);