linux-kernel - [PATCH 04/11] extcon: arizona: Allow configuration of MICBIAS rise time

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Date:	Thu, 10 Jan 2013 12:04:15 +0000
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	MyungJoo Ham <myungjoo.ham@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Samuel Ortiz <sameo@...ux.intel.com>,
	patches@...nsource.wolfsonmicro.com, linux-kernel@...r.kernel.org,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: [PATCH 04/11] 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@...nsource.wolfsonmicro.com>
Acked-by: MyungJoo Ham <myungjoo.ham@...sung.com>
---
 drivers/extcon/extcon-arizona.c   |    6 ++++++
 include/linux/mfd/arizona/pdata.h |    3 +++
 2 files changed, 9 insertions(+)

diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index 9e1d104..635b707 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 8b1d1da..5b05088 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;
-- 
1.7.10.4

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