linux-kernel - [PATCH] mfd: arizona: Support configuring MICBIASes into bypass mode

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Message-Id: <1362452813-29158-1-git-send-email-broonie@opensource.wolfsonmicro.com>
Date:	Tue,  5 Mar 2013 11:06:53 +0800
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Samuel Ortiz <sameo@...ux.intel.com>
Cc:	linux-kernel@...r.kernel.org, patches@...nsource.wolfsonmicro.com,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: [PATCH] mfd: arizona: Support configuring MICBIASes into bypass mode

Signed-off-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>
---
 drivers/mfd/arizona-core.c        |   12 +++++++++++-
 include/linux/mfd/arizona/pdata.h |    1 +
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
index d12f21b..07fc2c1 100644
--- a/drivers/mfd/arizona-core.c
+++ b/drivers/mfd/arizona-core.c
@@ -532,10 +532,16 @@ int __devinit arizona_dev_init(struct arizona *arizona)
 	}
 
 	for (i = 0; i < ARIZONA_MAX_MICBIAS; i++) {
-		if (!arizona->pdata.micbias[i].mV)
+		if (!arizona->pdata.micbias[i].mV &&
+		    !arizona->pdata.micbias[i].bypass)
 			continue;
 
+		/* Apply default for bypass mode */
+		if (!arizona->pdata.micbias[i].mV)
+			arizona->pdata.micbias[i].mV = 2800;
+
 		val = (arizona->pdata.micbias[i].mV - 1500) / 100;
+
 		val <<= ARIZONA_MICB1_LVL_SHIFT;
 
 		if (arizona->pdata.micbias[i].ext_cap)
@@ -547,10 +553,14 @@ int __devinit arizona_dev_init(struct arizona *arizona)
 		if (arizona->pdata.micbias[i].fast_start)
 			val |= ARIZONA_MICB1_RATE;
 
+		if (arizona->pdata.micbias[i].bypass)
+			val |= ARIZONA_MICB1_BYPASS;
+
 		regmap_update_bits(arizona->regmap,
 				   ARIZONA_MIC_BIAS_CTRL_1 + i,
 				   ARIZONA_MICB1_LVL_MASK |
 				   ARIZONA_MICB1_DISCH |
+				   ARIZONA_MICB1_BYPASS |
 				   ARIZONA_MICB1_RATE, val);
 	}
 
diff --git a/include/linux/mfd/arizona/pdata.h b/include/linux/mfd/arizona/pdata.h
index d27fbd7..b09fa93 100644
--- a/include/linux/mfd/arizona/pdata.h
+++ b/include/linux/mfd/arizona/pdata.h
@@ -85,6 +85,7 @@ struct arizona_micbias {
 	unsigned int ext_cap:1;    /** External capacitor fitted */
 	unsigned int discharge:1;  /** Actively discharge */
 	unsigned int fast_start:1; /** Enable aggressive startup ramp rate */
+	unsigned int bypass:1;     /** Use bypass mode */
 };
 
 struct arizona_micd_config {
-- 
1.7.10.4

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