linux-kernel - [PATCH 3/5] mfd: arizona: Add simple microphone detection device tree bindings

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Date:	Mon, 23 Sep 2013 19:30:41 +0100
From:	Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
To:	lee.jones@...aro.org
Cc:	sameo@...ux.intel.com, rob.herring@...xeda.com, pawel.moll@....com,
	mark.rutland@....com, swarren@...dotorg.org,
	ijc+devicetree@...lion.org.uk, rob@...dley.net, broonie@...nel.org,
	patches@...nsource.wolfsonmicro.com, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
Subject: [PATCH 3/5] mfd: arizona: Add simple microphone detection device tree bindings

Add device tree bindings for several of simpler microphone detection
pdata fields.

Signed-off-by: Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
---
 Documentation/devicetree/bindings/mfd/arizona.txt |   23 +++++++++++++++++++++
 drivers/mfd/arizona-core.c                        |   22 ++++++++++++++++++++
 2 files changed, 45 insertions(+), 0 deletions(-)

diff --git a/Documentation/devicetree/bindings/mfd/arizona.txt b/Documentation/devicetree/bindings/mfd/arizona.txt
index 9eeef62..3ee659d 100644
--- a/Documentation/devicetree/bindings/mfd/arizona.txt
+++ b/Documentation/devicetree/bindings/mfd/arizona.txt
@@ -34,6 +34,22 @@ Optional properties:
   - wlf,reset : GPIO specifier for the GPIO controlling /RESET
   - wlf,ldoena : GPIO specifier for the GPIO controlling LDOENA
 
+  - wlf,micd-detect-debounce : Additional software microphone detection
+    debounce specified in milliseconds
+  - wlf,micd-pol-gpio : GPIO specifier for the GPIO controlling the headset
+    polarity if one exists
+  - wlf,micd-bias-start-time : Time allowed for MICBIAS to startup prior to
+    performing microphone detection, specified as per the MICD_BIAS_STARTTIME
+    bits in the register MIC_DETECT_1
+  - wlf,micd-rate : Delay between successive microphone detection measurements,
+    specified as per the MICD_RATE bits in the register MIC_DETECT_1
+  - wlf,micd-dbtime : Microphone detection hardware debounce level, specified
+    as per the MICD_DBTIME bits in the register MIC_DETECT_1
+  - wlf,micd-timeout : Timeout for microphone detection, specified in
+    milliseconds
+  - wlf,micd-force-micbias : Force MICBIAS continuously on during microphone
+    detection
+
   - wlf,gpio-defaults : A list of GPIO configuration register values. If
     absent, no configuration of these registers is performed. If any
     entry has a value that is out of range for a 16 bit register then
@@ -57,6 +73,13 @@ codec: wm5102@1a {
 	gpio-controller;
 	#gpio-cells = <2>;
 
+	wlf,micd-detect-debounce = <10>;
+	wlf,micd-bias-start-time = <0x1>;
+	wlf,micd-rate = <0x1>;
+	wlf,micd-dbtime = <0x1>;
+	wlf,micd-timeout = <10>;
+	wlf,micd-force-micbias;
+
 	wlf,gpio-defaults = <
 		0x00000000 /* AIF1TXLRCLK */
 		0xffffffff
diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
index b3337ee..1cc6aa0 100644
--- a/drivers/mfd/arizona-core.c
+++ b/drivers/mfd/arizona-core.c
@@ -603,6 +603,28 @@ static int arizona_of_get_core_pdata(struct arizona *arizona)
 	arizona_of_get_named_gpio(arizona, "wlf,reset", true, &pdata->reset);
 	arizona_of_get_named_gpio(arizona, "wlf,ldoena", true, &pdata->ldoena);
 
+	arizona_of_read_u32(arizona, "wlf,micd-detect-debounce", false,
+			    &pdata->micd_detect_debounce);
+
+	arizona_of_get_named_gpio(arizona, "wlf,micd-pol-gpio", false,
+				  &pdata->micd_pol_gpio);
+
+	arizona_of_read_u32(arizona, "wlf,micd-bias-start-time", false,
+			    &pdata->micd_bias_start_time);
+
+	arizona_of_read_u32(arizona, "wlf,micd-rate", false,
+			    &pdata->micd_rate);
+
+	arizona_of_read_u32(arizona, "wlf,micd-dbtime", false,
+			    &pdata->micd_dbtime);
+
+	arizona_of_read_u32(arizona, "wlf,micd-timeout", false,
+			    &pdata->micd_timeout);
+
+	pdata->micd_force_micbias =
+		of_property_read_bool(arizona->dev->of_node,
+				      "wlf,micd-force-micbias");
+
 	arizona_of_get_gpio_defaults(arizona, "wlf,gpio-defaults");
 
 	arizona_of_read_u32_array(arizona, "wlf,max-channels-clocked",
-- 
1.7.2.5

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