* [PATCH v1 5/6] ASoC: codecs: msm8916-wcd-analog: add MBHC support
2017-07-26 0:35 [PATCH v1 0/6] ASoC: codecs: msm8916-wcd-analog: Add support to MBHC srinivas.kandagatla
@ 2017-07-26 0:35 ` srinivas.kandagatla
2017-07-28 13:51 ` Mark Brown
0 siblings, 1 reply; 5+ messages in thread
From: srinivas.kandagatla @ 2017-07-26 0:35 UTC (permalink / raw)
To: Mark Brown, Banajit Goswami, alsa-devel
Cc: Jaroslav Kysela, Takashi Iwai, Patrick Lai, linux-kernel,
Srinivas Kandagatla
From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
MBHC (MultiButton Headset Control) support is available in pm8921 in two
blocks, one to detect mechanical headset insertion and removal and other
block to support headset type detection and 5 button detection and othe
features like impedance calculation.
This patch adds support to:
1> Support to NC and NO type of headset Jacks.
2> Mechanical insertion and detection of headset jack.
3> Detect a 3 pole Headphone and a 4 pole Headset.
4> Detect 5 buttons.
Tested it on DB410c with Audio Mezz board with 4 pole and 3 pole
headset/headphones.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
.../bindings/sound/qcom,msm8916-wcd-analog.txt | 8 +
sound/soc/codecs/msm8916-wcd-analog.c | 323 +++++++++++++++++++++
sound/soc/codecs/msm8916-wcd.h | 12 +
3 files changed, 343 insertions(+)
create mode 100644 sound/soc/codecs/msm8916-wcd.h
diff --git a/Documentation/devicetree/bindings/sound/qcom,msm8916-wcd-analog.txt b/Documentation/devicetree/bindings/sound/qcom,msm8916-wcd-analog.txt
index 05b67a1..c46401c 100644
--- a/Documentation/devicetree/bindings/sound/qcom,msm8916-wcd-analog.txt
+++ b/Documentation/devicetree/bindings/sound/qcom,msm8916-wcd-analog.txt
@@ -34,6 +34,14 @@ Required properties
Optional Properties:
- qcom,micbias-lvl: Voltage (mV) for Mic Bias
+- qcom,hphl-jack-type-normally-open: boolean, present if hphl pin on jack is a
+ NO (Normally Open). If not specified, then
+ its assumed that hphl pin on jack is NC
+ (Normally Closed).
+- qcom,gnd-jack-type-normally-open: boolean, present if gnd pin on jack is
+ NO (Normally Open). If not specified, then
+ its assumed that gnd pin on jack is NC
+ (Normally Closed).
- qcom,micbias1-ext-cap: boolean, present if micbias1 has external capacitor
connected.
- qcom,micbias2-ext-cap: boolean, present if micbias2 has external capacitor
diff --git a/sound/soc/codecs/msm8916-wcd-analog.c b/sound/soc/codecs/msm8916-wcd-analog.c
index 69df0ee..4db2349 100644
--- a/sound/soc/codecs/msm8916-wcd-analog.c
+++ b/sound/soc/codecs/msm8916-wcd-analog.c
@@ -12,9 +12,21 @@
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/tlv.h>
+#include <sound/jack.h>
+#include "msm8916-wcd.h"
#define CDC_D_REVISION1 (0xf000)
#define CDC_D_PERPH_SUBTYPE (0xf005)
+#define CDC_D_INT_EN_SET (0x015)
+#define CDC_D_INT_EN_CLR (0x016)
+#define MBHC_SWITCH_INT BIT(7)
+#define MBHC_MIC_ELECTRICAL_INS_REM_DET BIT(6)
+#define MBHC_BUTTON_PRESS_DET BIT(5)
+#define MBHC_BUTTON_RELEASE_DET BIT(4)
+#define CDC_DEF_INT_MASK (MBHC_SWITCH_INT | \
+ MBHC_MIC_ELECTRICAL_INS_REM_DET | \
+ MBHC_BUTTON_PRESS_DET | \
+ MBHC_BUTTON_RELEASE_DET)
#define CDC_D_CDC_RST_CTL (0xf046)
#define RST_CTL_DIG_SW_RST_N_MASK BIT(7)
#define RST_CTL_DIG_SW_RST_N_RESET 0
@@ -37,6 +49,8 @@
#define DIG_CLK_CTL_RXD1_CLK_EN BIT(0)
#define DIG_CLK_CTL_RXD2_CLK_EN BIT(1)
#define DIG_CLK_CTL_RXD3_CLK_EN BIT(2)
+#define DIG_CLK_CTL_D_MBHC_CLK_EN_MASK BIT(3)
+#define DIG_CLK_CTL_D_MBHC_CLK_EN BIT(3)
#define DIG_CLK_CTL_TXD_CLK_EN BIT(4)
#define DIG_CLK_CTL_NCP_CLK_EN_MASK BIT(6)
#define DIG_CLK_CTL_NCP_CLK_EN BIT(6)
@@ -133,8 +147,51 @@
#define MICB_1_INT_TX3_INT_PULLUP_EN_TX1N_TO_GND 0
#define CDC_A_MICB_2_EN (0xf144)
+#define CDC_A_MICB_2_EN_ENABLE BIT(7)
+#define CDC_A_MICB_2_PULL_DOWN_EN_MASK BIT(5)
+#define CDC_A_MICB_2_PULL_DOWN_EN BIT(5)
#define CDC_A_TX_1_2_ATEST_CTL_2 (0xf145)
#define CDC_A_MASTER_BIAS_CTL (0xf146)
+#define CDC_A_MBHC_DET_CTL_1 (0xf147)
+#define CDC_A_MBHC_DET_CTL_L_DET_EN BIT(7)
+#define CDC_A_MBHC_DET_CTL_GND_DET_EN BIT(6)
+#define CDC_A_MBHC_DET_CTL_MECH_DET_TYPE_INSERTION BIT(5)
+#define CDC_A_MBHC_DET_CTL_MECH_DET_TYPE_REMOVAL (0)
+#define CDC_A_MBHC_DET_CTL_MECH_DET_TYPE_MASK BIT(5)
+#define CDC_A_MBHC_DET_CTL_MECH_DET_TYPE_SHIFT (5)
+#define CDC_A_MBHC_DET_CTL_MIC_CLAMP_CTL_AUTO BIT(4)
+#define CDC_A_MBHC_DET_CTL_MIC_CLAMP_CTL_MANUAL BIT(3)
+#define CDC_A_MBHC_DET_CTL_MIC_CLAMP_CTL_MASK GENMASK(4, 3)
+#define CDC_A_MBHC_DET_CTL_MBHC_BIAS_EN BIT(2)
+#define CDC_A_MBHC_DET_CTL_2 (0xf150)
+#define CDC_A_MBHC_DET_CTL_HS_L_DET_PULL_UP_CTRL_I_3P0 (BIT(7) | BIT(6))
+#define CDC_A_MBHC_DET_CTL_HS_L_DET_COMPA_CTRL_V0P9_VDD BIT(5)
+#define CDC_A_PLUG_TYPE_MASK GENMASK(4, 3)
+#define CDC_A_HPHL_PLUG_TYPE_NO BIT(4)
+#define CDC_A_GND_PLUG_TYPE_NO BIT(3)
+#define CDC_A_MBHC_DET_CTL_HPHL_100K_TO_GND_EN_MASK BIT(0)
+#define CDC_A_MBHC_DET_CTL_HPHL_100K_TO_GND_EN BIT(0)
+#define CDC_A_MBHC_FSM_CTL (0xf151)
+#define CDC_A_MBHC_FSM_CTL_MBHC_FSM_EN BIT(7)
+#define CDC_A_MBHC_FSM_CTL_MBHC_FSM_EN_MASK BIT(7)
+#define CDC_A_MBHC_FSM_CTL_BTN_ISRC_CTRL_I_100UA (0x3 << 4)
+#define CDC_A_MBHC_FSM_CTL_BTN_ISRC_CTRL_MASK GENMASK(6, 4)
+#define CDC_A_MBHC_DBNC_TIMER (0xf152)
+#define CDC_A_MBHC_DBNC_TIMER_BTN_DBNC_T_16MS BIT(3)
+#define CDC_A_MBHC_DBNC_TIMER_INSREM_DBNC_T_256_MS (0x9 << 4)
+#define CDC_A_MBHC_BTN0_ZDET_CTL_0 (0xf153)
+#define CDC_A_MBHC_BTN1_ZDET_CTL_1 (0xf154)
+#define CDC_A_MBHC_BTN2_ZDET_CTL_2 (0xf155)
+#define CDC_A_MBHC_BTN3_CTL (0xf156)
+#define CDC_A_MBHC_BTN4_CTL (0xf157)
+#define CDC_A_MBHC_BTN_VREF_FINE_SHIFT (2)
+#define CDC_A_MBHC_BTN_VREF_FINE_MASK GENMASK(4, 2)
+#define CDC_A_MBHC_BTN_VREF_COARSE_MASK GENMASK(7, 5)
+#define CDC_A_MBHC_BTN_VREF_COARSE_SHIFT (5)
+#define CDC_A_MBHC_BTN_VREF_MASK (CDC_A_MBHC_BTN_VREF_COARSE_MASK | \
+ CDC_A_MBHC_BTN_VREF_FINE_MASK)
+#define CDC_A_MBHC_RESULT_1 (0xf158)
+#define CDC_A_MBHC_RESULT_1_BTN_RESULT_MASK GENMASK(4, 0)
#define CDC_A_TX_1_EN (0xf160)
#define CDC_A_TX_2_EN (0xf161)
#define CDC_A_TX_1_2_TEST_CTL_1 (0xf162)
@@ -226,8 +283,18 @@ static const char * const supply_names[] = {
struct pm8916_wcd_analog_priv {
u16 pmic_rev;
u16 codec_version;
+ int mbhc_sw_irq;
+ int mbhc_btn_press_irq;
+ int mbhc_btn_release_irq;
+ /* special event to detect accessory type */
+ bool mbhc_btn0_pressed;
struct clk *mclk;
+ struct snd_soc_codec *codec;
struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
+ struct snd_soc_jack *jack;
+ bool hphl_jack_type_normally_open;
+ bool gnd_jack_type_normally_open;
+ struct msm8916_wcd_mbhc_data mbhc_data;
unsigned int micbias1_cap_mode;
unsigned int micbias2_cap_mode;
unsigned int micbias_mv;
@@ -365,6 +432,92 @@ static int pm8916_wcd_analog_enable_micbias_int1(struct
wcd->micbias1_cap_mode);
}
+static void pm8916_wcd_setup_mbhc(struct pm8916_wcd_analog_priv *wcd)
+{
+ struct snd_soc_codec *codec = wcd->codec;
+ u32 plug_type = 0;
+
+ snd_soc_write(codec, CDC_A_MBHC_DET_CTL_1,
+ CDC_A_MBHC_DET_CTL_L_DET_EN |
+ CDC_A_MBHC_DET_CTL_MECH_DET_TYPE_INSERTION |
+ CDC_A_MBHC_DET_CTL_MIC_CLAMP_CTL_AUTO |
+ CDC_A_MBHC_DET_CTL_MBHC_BIAS_EN);
+
+ if (wcd->hphl_jack_type_normally_open)
+ plug_type = CDC_A_HPHL_PLUG_TYPE_NO;
+
+ if (wcd->gnd_jack_type_normally_open)
+ plug_type |= CDC_A_GND_PLUG_TYPE_NO;
+
+ snd_soc_write(codec, CDC_A_MBHC_DET_CTL_2,
+ CDC_A_MBHC_DET_CTL_HS_L_DET_PULL_UP_CTRL_I_3P0 |
+ CDC_A_MBHC_DET_CTL_HS_L_DET_COMPA_CTRL_V0P9_VDD |
+ plug_type |
+ CDC_A_MBHC_DET_CTL_HPHL_100K_TO_GND_EN);
+
+
+ snd_soc_write(codec, CDC_A_MBHC_DBNC_TIMER,
+ CDC_A_MBHC_DBNC_TIMER_INSREM_DBNC_T_256_MS |
+ CDC_A_MBHC_DBNC_TIMER_BTN_DBNC_T_16MS);
+
+ /* enable MBHC clock */
+ snd_soc_update_bits(codec, CDC_D_CDC_DIG_CLK_CTL,
+ DIG_CLK_CTL_D_MBHC_CLK_EN_MASK,
+ DIG_CLK_CTL_D_MBHC_CLK_EN);
+
+ snd_soc_update_bits(codec, CDC_D_INT_EN_CLR, CDC_DEF_INT_MASK, 0);
+ snd_soc_update_bits(codec, CDC_D_INT_EN_SET, CDC_DEF_INT_MASK,
+ CDC_DEF_INT_MASK);
+ wcd->mbhc_btn0_pressed = false;
+}
+
+static int pm8916_mbhc_configure_bias(struct pm8916_wcd_analog_priv *priv,
+ bool micbias2_enabled)
+{
+ struct snd_soc_codec *codec = priv->codec;
+ u32 coarse, fine, reg_val, reg_addr;
+ int *vrefs, i;
+
+ if (!micbias2_enabled) { /* use internal 100uA Current source */
+ /* Enable internal 2.2k Internal Rbias Resistor */
+ snd_soc_update_bits(codec, CDC_A_MICB_1_INT_RBIAS,
+ MICB_1_INT_TX2_INT_RBIAS_EN_MASK,
+ MICB_1_INT_TX2_INT_RBIAS_EN_ENABLE);
+ /* Remove pull down on MIC BIAS2 */
+ snd_soc_update_bits(codec, CDC_A_MICB_2_EN,
+ CDC_A_MICB_2_PULL_DOWN_EN_MASK,
+ 0);
+ /* enable 100uA internal current source */
+ snd_soc_update_bits(codec, CDC_A_MBHC_FSM_CTL,
+ CDC_A_MBHC_FSM_CTL_BTN_ISRC_CTRL_MASK,
+ CDC_A_MBHC_FSM_CTL_BTN_ISRC_CTRL_I_100UA);
+ }
+ snd_soc_update_bits(codec, CDC_A_MBHC_FSM_CTL,
+ CDC_A_MBHC_FSM_CTL_MBHC_FSM_EN_MASK,
+ CDC_A_MBHC_FSM_CTL_MBHC_FSM_EN);
+
+ if (micbias2_enabled)
+ vrefs = &priv->mbhc_data.vref_btn_micb[0];
+ else
+ vrefs = &priv->mbhc_data.vref_btn_cs[0];
+
+ /* program vref ranges for all the buttons */
+ reg_addr = CDC_A_MBHC_BTN0_ZDET_CTL_0;
+ for (i = 0; i < MBHC_MAX_BUTTONS; i++) {
+ /* split mv in to coarse parts of 100mv & fine parts of 12mv */
+ coarse = (vrefs[i] / 100);
+ fine = ((vrefs[i] % 100) / 12);
+ reg_val = (coarse << CDC_A_MBHC_BTN_VREF_COARSE_SHIFT) |
+ (fine << CDC_A_MBHC_BTN_VREF_FINE_SHIFT);
+ snd_soc_update_bits(codec, reg_addr,
+ CDC_A_MBHC_BTN_VREF_MASK,
+ reg_val);
+ reg_addr++;
+ }
+
+ return 0;
+}
+
static int pm8916_wcd_analog_enable_micbias_int2(struct
snd_soc_dapm_widget
*w, struct snd_kcontrol
@@ -373,6 +526,15 @@ static int pm8916_wcd_analog_enable_micbias_int2(struct
struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
struct pm8916_wcd_analog_priv *wcd = snd_soc_codec_get_drvdata(codec);
+ switch (event) {
+ case SND_SOC_DAPM_POST_PMU:
+ pm8916_mbhc_configure_bias(wcd, true);
+ break;
+ case SND_SOC_DAPM_POST_PMD:
+ pm8916_mbhc_configure_bias(wcd, false);
+ break;
+ }
+
return pm8916_wcd_analog_enable_micbias_int(codec, event, w->reg,
wcd->micbias2_cap_mode);
}
@@ -540,9 +702,14 @@ static int pm8916_wcd_analog_probe(struct snd_soc_codec *codec)
snd_soc_write(codec, wcd_reg_defaults_2_0[reg].reg,
wcd_reg_defaults_2_0[reg].def);
+ priv->codec = codec;
+
snd_soc_update_bits(codec, CDC_D_CDC_RST_CTL,
RST_CTL_DIG_SW_RST_N_MASK,
RST_CTL_DIG_SW_RST_N_REMOVE_RESET);
+
+ pm8916_wcd_setup_mbhc(priv);
+
return 0;
}
@@ -741,11 +908,110 @@ static const struct snd_soc_dapm_widget pm8916_wcd_analog_dapm_widgets[] = {
SND_SOC_DAPM_SUPPLY("A_MCLK2", CDC_D_CDC_TOP_CLK_CTL, 3, 0, NULL, 0),
};
+static int pm8916_wcd_analog_set_jack(struct snd_soc_codec *codec,
+ struct snd_soc_jack *jack,
+ void *data)
+{
+ struct msm8916_wcd_mbhc_data *d = data;
+ struct pm8916_wcd_analog_priv *wcd = snd_soc_codec_get_drvdata(codec);
+
+ wcd->jack = jack;
+ wcd->mbhc_data = *d;
+
+ return 0;
+}
+
static struct regmap *pm8916_get_regmap(struct device *dev)
{
return dev_get_regmap(dev->parent, NULL);
}
+static irqreturn_t mbhc_btn_release_irq_handler(int irq, void *arg)
+{
+ struct pm8916_wcd_analog_priv *priv = arg;
+ struct snd_soc_codec *codec = priv->codec;
+ u32 btn_result;
+
+ btn_result = snd_soc_read(codec, CDC_A_MBHC_RESULT_1) &
+ CDC_A_MBHC_RESULT_1_BTN_RESULT_MASK;
+
+ if (!btn_result)
+ priv->mbhc_btn0_pressed = false;
+
+ snd_jack_report(priv->jack->jack, 0);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t mbhc_btn_press_irq_handler(int irq, void *arg)
+{
+ struct pm8916_wcd_analog_priv *priv = arg;
+ struct snd_soc_codec *codec = priv->codec;
+ u32 btn_result;
+
+ btn_result = snd_soc_read(codec, CDC_A_MBHC_RESULT_1) &
+ CDC_A_MBHC_RESULT_1_BTN_RESULT_MASK;
+
+ switch (btn_result) {
+ case 0xf:
+ snd_jack_report(priv->jack->jack, SND_JACK_BTN_4);
+ break;
+ case 0x7:
+ snd_jack_report(priv->jack->jack, SND_JACK_BTN_3);
+ break;
+ case 0x3:
+ snd_jack_report(priv->jack->jack, SND_JACK_BTN_2);
+ break;
+ case 0x1:
+ snd_jack_report(priv->jack->jack, SND_JACK_BTN_1);
+ break;
+ case 0:
+ priv->mbhc_btn0_pressed = true;
+ snd_jack_report(priv->jack->jack, SND_JACK_BTN_0);
+ break;
+ }
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t pm8916_mbhc_switch_irq_handler(int irq, void *arg)
+{
+ struct pm8916_wcd_analog_priv *priv = arg;
+ struct snd_soc_codec *codec = priv->codec;
+ bool micbias_enabled = false;
+ bool ins = false;
+
+ if (snd_soc_read(codec, CDC_A_MBHC_DET_CTL_1) &
+ CDC_A_MBHC_DET_CTL_MECH_DET_TYPE_MASK)
+ ins = true;
+
+ /* Set the detection type appropriately */
+ snd_soc_update_bits(codec, CDC_A_MBHC_DET_CTL_1,
+ CDC_A_MBHC_DET_CTL_MECH_DET_TYPE_MASK,
+ (!ins << CDC_A_MBHC_DET_CTL_MECH_DET_TYPE_SHIFT));
+ if (ins) { /* hs insertion */
+ if (snd_soc_read(codec, CDC_A_MICB_2_EN) &
+ CDC_A_MICB_2_EN_ENABLE)
+ micbias_enabled = true;
+
+ pm8916_mbhc_configure_bias(priv, micbias_enabled);
+
+ /*
+ * if only a btn press event is receive just before
+ * insert event then its a 3 pole headphone
+ */
+ if (priv->mbhc_btn0_pressed)
+ snd_jack_report(priv->jack->jack, SND_JACK_HEADPHONE);
+ else
+ snd_jack_report(priv->jack->jack, SND_JACK_HEADSET);
+
+ } else { /* removal */
+ snd_jack_report(priv->jack->jack, 0);
+ }
+
+ return IRQ_HANDLED;
+}
+
static struct snd_soc_dai_driver pm8916_wcd_analog_dai[] = {
[0] = {
.name = "pm8916_wcd_analog_pdm_rx",
@@ -774,6 +1040,7 @@ static struct snd_soc_dai_driver pm8916_wcd_analog_dai[] = {
static struct snd_soc_codec_driver pm8916_wcd_analog = {
.probe = pm8916_wcd_analog_probe,
.remove = pm8916_wcd_analog_remove,
+ .set_jack = pm8916_wcd_analog_set_jack,
.get_regmap = pm8916_get_regmap,
.component_driver = {
.controls = pm8916_wcd_analog_snd_controls,
@@ -803,6 +1070,18 @@ static int pm8916_wcd_analog_parse_dt(struct device *dev,
&priv->micbias_mv))
priv->micbias_mv = MICB_DEFAULT_VAL;
+ if (of_property_read_bool(dev->of_node,
+ "qcom,hphl-jack-type-normally-open"))
+ priv->hphl_jack_type_normally_open = true;
+ else
+ priv->hphl_jack_type_normally_open = false;
+
+ if (of_property_read_bool(dev->of_node,
+ "qcom,gnd-jack-type-normally-open"))
+ priv->gnd_jack_type_normally_open = true;
+ else
+ priv->gnd_jack_type_normally_open = false;
+
return 0;
}
@@ -842,6 +1121,50 @@ static int pm8916_wcd_analog_spmi_probe(struct platform_device *pdev)
return ret;
}
+ priv->mbhc_sw_irq = platform_get_irq_byname(pdev, "mbhc_switch_int");
+ if (priv->mbhc_sw_irq < 0) {
+ dev_err(dev, "failed to get mbhc switch irq\n");
+ return priv->mbhc_sw_irq;
+ }
+
+ priv->mbhc_btn_press_irq = platform_get_irq_byname(pdev,
+ "mbhc_but_press_det");
+ if (priv->mbhc_btn_press_irq < 0) {
+ dev_err(dev, "failed to get button press irq\n");
+ return priv->mbhc_btn_press_irq;
+ }
+
+ priv->mbhc_btn_release_irq = platform_get_irq_byname(pdev,
+ "mbhc_but_rel_det");
+ if (priv->mbhc_btn_release_irq < 0) {
+ dev_err(dev, "failed to get button release irq\n");
+ return priv->mbhc_btn_release_irq;
+ }
+
+ ret = devm_request_irq(dev, priv->mbhc_btn_release_irq,
+ mbhc_btn_release_irq_handler,
+ IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ "mbhc btn release irq", priv);
+ if (ret)
+ dev_err(dev, "cannot request mbhc button release irq\n");
+
+ ret = devm_request_irq(dev, priv->mbhc_btn_press_irq,
+ mbhc_btn_press_irq_handler,
+ IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ "mbhc btn press irq", priv);
+ if (ret)
+ dev_err(dev, "cannot request mbhc button press irq\n");
+
+ ret = devm_request_irq(dev, priv->mbhc_sw_irq,
+ pm8916_mbhc_switch_irq_handler,
+ IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ "mbhc switch irq", priv);
+ if (ret)
+ dev_err(dev, "cannot request mbhc switch irq\n");
+
dev_set_drvdata(dev, priv);
return snd_soc_register_codec(dev, &pm8916_wcd_analog,
diff --git a/sound/soc/codecs/msm8916-wcd.h b/sound/soc/codecs/msm8916-wcd.h
new file mode 100644
index 0000000..23f1d7a
--- /dev/null
+++ b/sound/soc/codecs/msm8916-wcd.h
@@ -0,0 +1,12 @@
+#ifndef _MSM8916_WCD_H_
+#define _MSM8916_WCD_H_
+
+#define MBHC_MAX_BUTTONS (5)
+struct msm8916_wcd_mbhc_data {
+ /* Voltage threshold when internal current source of 100uA is used */
+ int vref_btn_cs[MBHC_MAX_BUTTONS];
+ /* Voltage threshold when microphone bias is ON */
+ int vref_btn_micb[MBHC_MAX_BUTTONS];
+};
+
+#endif /* _MSM8916_WCD_H_ */
--
2.9.3
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