linux-kernel - [PATCH v2 5/7] extcon: arizona: Add support for headphone detection on wm5110 rev D

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Date:	Thu, 14 Nov 2013 14:11:35 +0000
From:	Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
To:	cw00.choi@...sung.com
Cc:	myungjoo.ham@...sung.com, sameo@...ux.intel.com,
	lee.jones@...aro.org, patches@...nsource.wolfsonmicro.com,
	linux-kernel@...r.kernel.org,
	Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
Subject: [PATCH v2 5/7] extcon: arizona: Add support for headphone detection on wm5110 rev D

wm5110 rev D is the first chip to use headphone detection IP 2, specify
such and make a small correction as the impedance value is actually read
in 0.5 ohm increments now.

Signed-off-by: Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
---
 drivers/extcon/extcon-arizona.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index 1a48b10..f4fe2d1 100644
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -435,6 +435,8 @@ static int arizona_hpdet_read(struct arizona_extcon_info *info)
 		}
 
 		val &= ARIZONA_HP_LVL_B_MASK;
+		/* Convert to ohms, the value is in 0.5 ohm increments */
+		val /= 2;
 
 		regmap_read(arizona->regmap, ARIZONA_HEADPHONE_DETECT_1,
 			    &range);
@@ -1146,6 +1148,16 @@ static int arizona_extcon_probe(struct platform_device *pdev)
 			break;
 		}
 		break;
+	case WM5110:
+		switch (arizona->rev) {
+		case 0 ... 2:
+			break;
+		default:
+			info->micd_clamp = true;
+			info->hpdet_ip = 2;
+			break;
+		}
+		break;
 	default:
 		break;
 	}
-- 
1.7.2.5

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