[PATCH] ASoC: codecs: msm8916-wcd-analog: add MBHC support

From: Srinivas Kandagatla
Date: Thu Aug 17 2017 - 04:02:10 EST

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@xxxxxxxxxx>
Tested-by: Damien Riegel <damien.riegel@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
---
.../bindings/sound/qcom,msm8916-wcd-analog.txt | 17 +-
sound/soc/codecs/msm8916-wcd-analog.c | 373 ++++++++++++++++++++-
2 files changed, 388 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/qcom,msm8916-wcd-analog.txt b/Documentation/devicetree/bindings/sound/qcom,msm8916-wcd-analog.txt
index 05b67a1d4851..551ecab67efe 100644
--- a/Documentation/devicetree/bindings/sound/qcom,msm8916-wcd-analog.txt
+++ b/Documentation/devicetree/bindings/sound/qcom,msm8916-wcd-analog.txt
@@ -31,9 +31,22 @@ Required properties
- vdd-cdc-io-supply: phandle to VDD_CDC_IO regulator DT node.
- vdd-cdc-tx-rx-cx-supply: phandle to VDD_CDC_TX/RX/CX regulator DT node.
- vdd-micbias-supply: phandle of VDD_MICBIAS supply's regulator DT node.
-
Optional Properties:
+ - qcom,mbhc-vthreshold-low: Array of 5 threshold voltages in mV for 5 buttons
+ detection on headset when the mbhc is powered up
+ by internal current source, this is a low power.
+ - qcom,mbhc-vthreshold-high: Array of 5 thresold voltages in mV for 5 buttons
+ detection on headset when mbhc is powered up
+ from micbias.
- 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
@@ -49,6 +62,8 @@ spmi_bus {
reg-names = "pmic-codec-core";
clocks = <&gcc GCC_CODEC_DIGCODEC_CLK>;
clock-names = "mclk";
+ qcom,mbhc-vthreshold-low = <75 150 237 450 500>;
+ qcom,mbhc-vthreshold-high = <75 150 237 450 500>;
interrupt-parent = <&spmi_bus>;
interrupts = <0x1 0xf0 0x0 IRQ_TYPE_NONE>,
<0x1 0xf0 0x1 IRQ_TYPE_NONE>,
diff --git a/sound/soc/codecs/msm8916-wcd-analog.c b/sound/soc/codecs/msm8916-wcd-analog.c
index 8633524b1961..f834a639b350 100644
--- a/sound/soc/codecs/msm8916-wcd-analog.c
+++ b/sound/soc/codecs/msm8916-wcd-analog.c
@@ -12,9 +12,16 @@
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/tlv.h>
+#include <sound/jack.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_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 +44,8 @@
#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)
@@ -132,8 +141,51 @@
#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)
@@ -217,16 +269,34 @@
#define MSM8916_WCD_ANALOG_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\
SNDRV_PCM_FMTBIT_S24_LE)

+static int btn_mask = SND_JACK_BTN_0 | SND_JACK_BTN_1 |
+ SND_JACK_BTN_2 | SND_JACK_BTN_3 | SND_JACK_BTN_4;
+static int hs_jack_mask = SND_JACK_HEADPHONE | SND_JACK_HEADSET;
+
static const char * const supply_names[] = {
"vdd-cdc-io",
"vdd-cdc-tx-rx-cx",
};

+#define MBHC_MAX_BUTTONS (5)
+
struct pm8916_wcd_analog_priv {
u16 pmic_rev;
u16 codec_version;
+ bool mbhc_btn_enabled;
+ /* special event to detect accessory type */
+ bool mbhc_btn0_pressed;
+ bool detect_accessory_type;
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;
+ /* Voltage threshold when internal current source of 100uA is used */
+ u32 vref_btn_cs[MBHC_MAX_BUTTONS];
+ /* Voltage threshold when microphone bias is ON */
+ u32 vref_btn_micb[MBHC_MAX_BUTTONS];
unsigned int micbias1_cap_mode;
unsigned int micbias2_cap_mode;
unsigned int micbias_mv;
@@ -373,6 +443,97 @@ 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;
+ u32 int_en_mask;
+
+ 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);
+
+ int_en_mask = MBHC_SWITCH_INT;
+ if (wcd->mbhc_btn_enabled)
+ int_en_mask |= MBHC_BUTTON_PRESS_DET | MBHC_BUTTON_RELEASE_DET;
+
+ snd_soc_update_bits(codec, CDC_D_INT_EN_CLR, int_en_mask, 0);
+ snd_soc_update_bits(codec, CDC_D_INT_EN_SET, int_en_mask, int_en_mask);
+ wcd->mbhc_btn0_pressed = false;
+ wcd->detect_accessory_type = true;
+}
+
+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->vref_btn_micb[0];
+ else
+ vrefs = &priv->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
@@ -381,6 +542,15 @@ 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);
}
@@ -548,9 +718,14 @@ 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;
}

@@ -749,11 +924,130 @@ 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 pm8916_wcd_analog_priv *wcd = snd_soc_codec_get_drvdata(codec);
+
+ wcd->jack = jack;
+
+ 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;
+
+ if (priv->detect_accessory_type) {
+ struct snd_soc_codec *codec = priv->codec;
+ u32 val = snd_soc_read(codec, CDC_A_MBHC_RESULT_1);
+
+ /* check if its BTN0 thats released */
+ if ((val >= 0) && !(val & CDC_A_MBHC_RESULT_1_BTN_RESULT_MASK))
+ priv->mbhc_btn0_pressed = false;
+
+ } else {
+ snd_soc_jack_report(priv->jack, 0, btn_mask);
+ }
+
+ 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_soc_jack_report(priv->jack, SND_JACK_BTN_4, btn_mask);
+ break;
+ case 0x7:
+ snd_soc_jack_report(priv->jack, SND_JACK_BTN_3, btn_mask);
+ break;
+ case 0x3:
+ snd_soc_jack_report(priv->jack, SND_JACK_BTN_2, btn_mask);
+ break;
+ case 0x1:
+ snd_soc_jack_report(priv->jack, SND_JACK_BTN_1, btn_mask);
+ break;
+ case 0x0:
+ /* handle BTN_0 specially for type detection */
+ if (priv->detect_accessory_type)
+ priv->mbhc_btn0_pressed = true;
+ else
+ snd_soc_jack_report(priv->jack,
+ SND_JACK_BTN_0, btn_mask);
+ break;
+ default:
+ dev_err(codec->dev,
+ "Unexpected button press result (%x)", btn_result);
+ 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 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 */
+ bool micbias_enabled = false;
+
+ 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 btn0 press event is receive just before
+ * insert event then its a 3 pole headphone else if
+ * both press and release event received then its
+ * a headset.
+ */
+ if (priv->mbhc_btn0_pressed)
+ snd_soc_jack_report(priv->jack,
+ SND_JACK_HEADPHONE, hs_jack_mask);
+ else
+ snd_soc_jack_report(priv->jack,
+ SND_JACK_HEADSET, hs_jack_mask);
+
+ priv->detect_accessory_type = false;
+
+ } else { /* removal */
+ snd_soc_jack_report(priv->jack, 0, hs_jack_mask);
+ priv->detect_accessory_type = true;
+ priv->mbhc_btn0_pressed = false;
+ }
+
+ return IRQ_HANDLED;
+}
+
static struct snd_soc_dai_driver pm8916_wcd_analog_dai[] = {
[0] = {
.name = "pm8916_wcd_analog_pdm_rx",
@@ -782,6 +1076,7 @@ static struct snd_soc_dai_driver pm8916_wcd_analog_dai[] = {
static const 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,
@@ -796,6 +1091,7 @@ static const struct snd_soc_codec_driver pm8916_wcd_analog = {
static int pm8916_wcd_analog_parse_dt(struct device *dev,
struct pm8916_wcd_analog_priv *priv)
{
+ int rval;

if (of_property_read_bool(dev->of_node, "qcom,micbias1-ext-cap"))
priv->micbias1_cap_mode = MICB_1_EN_EXT_BYP_CAP;
@@ -810,6 +1106,39 @@ static int pm8916_wcd_analog_parse_dt(struct device *dev,
of_property_read_u32(dev->of_node, "qcom,micbias-lvl",
&priv->micbias_mv);

+ 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;
+
+ priv->mbhc_btn_enabled = true;
+ rval = of_property_read_u32_array(dev->of_node,
+ "qcom,mbhc-vthreshold-low",
+ &priv->vref_btn_cs[0],
+ MBHC_MAX_BUTTONS);
+ if (rval < 0) {
+ priv->mbhc_btn_enabled = false;
+ } else {
+ rval = of_property_read_u32_array(dev->of_node,
+ "qcom,mbhc-vthreshold-high",
+ &priv->vref_btn_micb[0],
+ MBHC_MAX_BUTTONS);
+ if (rval < 0)
+ priv->mbhc_btn_enabled = false;
+ }
+
+ if (!priv->mbhc_btn_enabled)
+ dev_err(dev,
+ "DT property missing, MBHC btn detection disabled\n");
+
+
return 0;
}

@@ -817,7 +1146,7 @@ static int pm8916_wcd_analog_spmi_probe(struct platform_device *pdev)
{
struct pm8916_wcd_analog_priv *priv;
struct device *dev = &pdev->dev;
- int ret, i;
+ int ret, i, irq;

priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
@@ -849,6 +1178,48 @@ static int pm8916_wcd_analog_spmi_probe(struct platform_device *pdev)
return ret;
}

+ irq = platform_get_irq_byname(pdev, "mbhc_switch_int");
+ if (irq < 0) {
+ dev_err(dev, "failed to get mbhc switch irq\n");
+ return irq;
+ }
+
+ ret = devm_request_irq(dev, 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");
+
+ if (priv->mbhc_btn_enabled) {
+ irq = platform_get_irq_byname(pdev, "mbhc_but_press_det");
+ if (irq < 0) {
+ dev_err(dev, "failed to get button press irq\n");
+ return irq;
+ }
+
+ ret = devm_request_irq(dev, 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");
+
+ irq = platform_get_irq_byname(pdev, "mbhc_but_rel_det");
+ if (irq < 0) {
+ dev_err(dev, "failed to get button release irq\n");
+ return irq;
+ }
+
+ ret = devm_request_irq(dev, 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");
+
+ }
+
dev_set_drvdata(dev, priv);

return snd_soc_register_codec(dev, &pm8916_wcd_analog,
--
2.13.3