Merge tag 'extcon-arizona-v3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc into char-misc-next

Mark writes:

	extcon: arizona: Updates for v3.10

	There's a bunch of different things in this series, I can split them out
	if need be:

	 - Support for configuring the button detection circuit to reflect the
	   accessories supplied with the system.
	 - Improvements in the HPDET based detection scheme.
	 - Additional robustness against more pathological use cases.
	 - A few small standalone fixes.

4 files changed, 320 insertions, 104 deletions

diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index b28927972128..7a1b4a7791ba 100644
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -33,12 +33,17 @@
 #include <linux/mfd/arizona/pdata.h>
 #include <linux/mfd/arizona/registers.h>
 
-#define ARIZONA_NUM_BUTTONS 6
+#define ARIZONA_MAX_MICD_RANGE 8
 
 #define ARIZONA_ACCDET_MODE_MIC 0
 #define ARIZONA_ACCDET_MODE_HPL 1
 #define ARIZONA_ACCDET_MODE_HPR 2
 
+#define ARIZONA_HPDET_MAX 10000
+
+#define HPDET_DEBOUNCE 500
+#define DEFAULT_MICD_TIMEOUT 2000
+
 struct arizona_extcon_info {
 	struct device *dev;
 	struct arizona *arizona;
@@ -46,17 +51,27 @@ struct arizona_extcon_info {
 	struct regulator *micvdd;
 	struct input_dev *input;
 
+	u16 last_jackdet;
+
 	int micd_mode;
 	const struct arizona_micd_config *micd_modes;
 	int micd_num_modes;
 
+	const struct arizona_micd_range *micd_ranges;
+	int num_micd_ranges;
+
+	int micd_timeout;
+
 	bool micd_reva;
 	bool micd_clamp;
 
 	struct delayed_work hpdet_work;
+	struct delayed_work micd_detect_work;
+	struct delayed_work micd_timeout_work;
 
 	bool hpdet_active;
 	bool hpdet_done;
+	bool hpdet_retried;
 
 	int num_hpdet_res;
 	unsigned int hpdet_res[3];
@@ -71,20 +86,25 @@ struct arizona_extcon_info {
 };
 
 static const struct arizona_micd_config micd_default_modes[] = {
-	{ 0,                  2 << ARIZONA_MICD_BIAS_SRC_SHIFT, 1 },
 	{ ARIZONA_ACCDET_SRC, 1 << ARIZONA_MICD_BIAS_SRC_SHIFT, 0 },
+	{ 0,                  2 << ARIZONA_MICD_BIAS_SRC_SHIFT, 1 },
 };
 
-static struct {
-	u16 status;
-	int report;
-} arizona_lvl_to_key[ARIZONA_NUM_BUTTONS] = {
-	{  0x1, BTN_0 },
-	{  0x2, BTN_1 },
-	{  0x4, BTN_2 },
-	{  0x8, BTN_3 },
-	{ 0x10, BTN_4 },
-	{ 0x20, BTN_5 },
+static const struct arizona_micd_range micd_default_ranges[] = {
+	{ .max =  11, .key = BTN_0 },
+	{ .max =  28, .key = BTN_1 },
+	{ .max =  54, .key = BTN_2 },
+	{ .max = 100, .key = BTN_3 },
+	{ .max = 186, .key = BTN_4 },
+	{ .max = 430, .key = BTN_5 },
+};
+
+static const int arizona_micd_levels[] = {
+	3, 6, 8, 11, 13, 16, 18, 21, 23, 26, 28, 31, 34, 36, 39, 41, 44, 46,
+	49, 52, 54, 57, 60, 62, 65, 67, 70, 73, 75, 78, 81, 83, 89, 94, 100,
+	105, 111, 116, 122, 127, 139, 150, 161, 173, 186, 196, 209, 220, 245,
+	270, 295, 321, 348, 375, 402, 430, 489, 550, 614, 681, 752, 903, 1071,
+	1257,
 };
 
 #define ARIZONA_CABLE_MECHANICAL 0
@@ -100,6 +120,8 @@ static const char *arizona_cable[] = {
 	NULL,
 };
 
+static void arizona_start_hpdet_acc_id(struct arizona_extcon_info *info);
+
 static void arizona_extcon_do_magic(struct arizona_extcon_info *info,
 				    unsigned int magic)
 {
@@ -153,6 +175,8 @@ static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode)
 {
 	struct arizona *arizona = info->arizona;
 
+	mode %= info->micd_num_modes;
+
 	if (arizona->pdata.micd_pol_gpio > 0)
 		gpio_set_value_cansleep(arizona->pdata.micd_pol_gpio,
 					info->micd_modes[mode].gpio);
@@ -379,7 +403,7 @@ static int arizona_hpdet_read(struct arizona_extcon_info *info)
 		/* If we go out of range report top of range */
 		if (val < 100 || val > 0x3fb) {
 			dev_dbg(arizona->dev, "Measurement out of range\n");
-			return 10000;
+			return ARIZONA_HPDET_MAX;
 		}
 
 		dev_dbg(arizona->dev, "HPDET read %d in range %d\n",
@@ -440,7 +464,8 @@ static int arizona_hpdet_read(struct arizona_extcon_info *info)
 	return val;
 }
 
-static int arizona_hpdet_do_id(struct arizona_extcon_info *info, int *reading)
+static int arizona_hpdet_do_id(struct arizona_extcon_info *info, int *reading,
+			       bool *mic)
 {
 	struct arizona *arizona = info->arizona;
 	int id_gpio = arizona->pdata.hpdet_id_gpio;
@@ -452,32 +477,8 @@ static int arizona_hpdet_do_id(struct arizona_extcon_info *info, int *reading)
 	if (arizona->pdata.hpdet_acc_id) {
 		info->hpdet_res[info->num_hpdet_res++] = *reading;
 
-		/*
-		 * If the impedence is too high don't measure the
-		 * second ground.
-		 */
-		if (info->num_hpdet_res == 1 && *reading >= 45) {
-			dev_dbg(arizona->dev, "Skipping ground flip\n");
-			info->hpdet_res[info->num_hpdet_res++] = *reading;
-		}
-
-		if (info->num_hpdet_res == 1) {
-			dev_dbg(arizona->dev, "Flipping ground\n");
-
-			regmap_update_bits(arizona->regmap,
-					   ARIZONA_ACCESSORY_DETECT_MODE_1,
-					   ARIZONA_ACCDET_SRC,
-					   ~info->micd_modes[0].src);
-
-			regmap_update_bits(arizona->regmap,
-					   ARIZONA_HEADPHONE_DETECT_1,
-					   ARIZONA_HP_POLL, ARIZONA_HP_POLL);
-			return -EAGAIN;
-		}
-
 		/* Only check the mic directly if we didn't already ID it */
-		if (id_gpio && info->num_hpdet_res == 2 &&
-		    !((info->hpdet_res[0] > info->hpdet_res[1] * 2))) {
+		if (id_gpio && info->num_hpdet_res == 1) {
 			dev_dbg(arizona->dev, "Measuring mic\n");
 
 			regmap_update_bits(arizona->regmap,
@@ -496,22 +497,28 @@ static int arizona_hpdet_do_id(struct arizona_extcon_info *info, int *reading)
 		}
 
 		/* OK, got both.  Now, compare... */
-		dev_dbg(arizona->dev, "HPDET measured %d %d %d\n",
-			info->hpdet_res[0], info->hpdet_res[1],
-			info->hpdet_res[2]);
-
+		dev_dbg(arizona->dev, "HPDET measured %d %d\n",
+			info->hpdet_res[0], info->hpdet_res[1]);
 
 		/* Take the headphone impedance for the main report */
 		*reading = info->hpdet_res[0];
 
+		/* Sometimes we get false readings due to slow insert */
+		if (*reading >= ARIZONA_HPDET_MAX && !info->hpdet_retried) {
+			dev_dbg(arizona->dev, "Retrying high impedance\n");
+			info->num_hpdet_res = 0;
+			info->hpdet_retried = true;
+			arizona_start_hpdet_acc_id(info);
+			pm_runtime_put(info->dev);
+			return -EAGAIN;
+		}
+
 		/*
-		 * Either the two grounds measure differently or we
-		 * measure the mic as high impedance.
+		 * If we measure the mic as 
 		 */
-		if ((info->hpdet_res[0] > info->hpdet_res[1] * 2) ||
-		    (id_gpio && info->hpdet_res[2] > 10)) {
+		if (!id_gpio || info->hpdet_res[1] > 50) {
 			dev_dbg(arizona->dev, "Detected mic\n");
-			info->mic = true;
+			*mic = true;
 			info->detecting = true;
 		} else {
 			dev_dbg(arizona->dev, "Detected headphone\n");
@@ -534,6 +541,7 @@ static irqreturn_t arizona_hpdet_irq(int irq, void *data)
 	int id_gpio = arizona->pdata.hpdet_id_gpio;
 	int report = ARIZONA_CABLE_HEADPHONE;
 	int ret, reading;
+	bool mic = false;
 
 	mutex_lock(&info->lock);
 
@@ -569,7 +577,7 @@ static irqreturn_t arizona_hpdet_irq(int irq, void *data)
 			   ARIZONA_HP_IMPEDANCE_RANGE_MASK | ARIZONA_HP_POLL,
 			   0);
 
-	ret = arizona_hpdet_do_id(info, &reading);
+	ret = arizona_hpdet_do_id(info, &reading, &mic);
 	if (ret == -EAGAIN) {
 		goto out;
 	} else if (ret < 0) {
@@ -599,7 +607,7 @@ done:
 			   ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC);
 
 	/* If we have a mic then reenable MICDET */
-	if (info->mic)
+	if (mic || info->mic)
 		arizona_start_mic(info);
 
 	if (info->hpdet_active) {
@@ -674,6 +682,8 @@ err:
 static void arizona_start_hpdet_acc_id(struct arizona_extcon_info *info)
 {
 	struct arizona *arizona = info->arizona;
+	int hp_reading = 32;
+	bool mic;
 	int ret;
 
 	dev_dbg(arizona->dev, "Starting identification via HPDET\n");
@@ -683,8 +693,6 @@ static void arizona_start_hpdet_acc_id(struct arizona_extcon_info *info)
 
 	info->hpdet_active = true;
 
-	arizona_extcon_pulse_micbias(info);
-
 	arizona_extcon_do_magic(info, 0x4000);
 
 	ret = regmap_update_bits(arizona->regmap,
@@ -697,12 +705,18 @@ static void arizona_start_hpdet_acc_id(struct arizona_extcon_info *info)
 		goto err;
 	}
 
-	ret = regmap_update_bits(arizona->regmap, ARIZONA_HEADPHONE_DETECT_1,
-				 ARIZONA_HP_POLL, ARIZONA_HP_POLL);
-	if (ret != 0) {
-		dev_err(arizona->dev, "Can't start HPDETL measurement: %d\n",
-			ret);
-		goto err;
+	if (arizona->pdata.hpdet_acc_id_line) {
+		ret = regmap_update_bits(arizona->regmap,
+					 ARIZONA_HEADPHONE_DETECT_1,
+					 ARIZONA_HP_POLL, ARIZONA_HP_POLL);
+		if (ret != 0) {
+			dev_err(arizona->dev,
+				"Can't start HPDETL measurement: %d\n",
+				ret);
+			goto err;
+		}
+	} else {
+		arizona_hpdet_do_id(info, &hp_reading, &mic);
 	}
 
 	return;
@@ -721,28 +735,58 @@ err:
 	info->hpdet_active = false;
 }
 
-static irqreturn_t arizona_micdet(int irq, void *data)
+static void arizona_micd_timeout_work(struct work_struct *work)
 {
-	struct arizona_extcon_info *info = data;
+	struct arizona_extcon_info *info = container_of(work,
+							struct arizona_extcon_info,
+							micd_timeout_work.work);
+
+	mutex_lock(&info->lock);
+
+	dev_dbg(info->arizona->dev, "MICD timed out, reporting HP\n");
+	arizona_identify_headphone(info);
+
+	info->detecting = false;
+
+	arizona_stop_mic(info);
+
+	mutex_unlock(&info->lock);
+}
+
+static void arizona_micd_detect(struct work_struct *work)
+{
+	struct arizona_extcon_info *info = container_of(work,
+							struct arizona_extcon_info,
+							micd_detect_work.work);
 	struct arizona *arizona = info->arizona;
-	unsigned int val, lvl;
-	int ret, i;
+	unsigned int val = 0, lvl;
+	int ret, i, key;
+
+	cancel_delayed_work_sync(&info->micd_timeout_work);
 
 	mutex_lock(&info->lock);
 
-	ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_3, &val);
-	if (ret != 0) {
-		dev_err(arizona->dev, "Failed to read MICDET: %d\n", ret);
-		mutex_unlock(&info->lock);
-		return IRQ_NONE;
-	}
+	for (i = 0; i < 10 && !(val & 0x7fc); i++) {
+		ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_3, &val);
+		if (ret != 0) {
+			dev_err(arizona->dev, "Failed to read MICDET: %d\n", ret);
+			mutex_unlock(&info->lock);
+			return;
+		}
 
-	dev_dbg(arizona->dev, "MICDET: %x\n", val);
+		dev_dbg(arizona->dev, "MICDET: %x\n", val);
 
-	if (!(val & ARIZONA_MICD_VALID)) {
-		dev_warn(arizona->dev, "Microphone detection state invalid\n");
+		if (!(val & ARIZONA_MICD_VALID)) {
+			dev_warn(arizona->dev, "Microphone detection state invalid\n");
+			mutex_unlock(&info->lock);
+			return;
+		}
+	}
+
+	if (i == 10 && !(val & 0x7fc)) {
+		dev_err(arizona->dev, "Failed to get valid MICDET value\n");
 		mutex_unlock(&info->lock);
-		return IRQ_NONE;
+		return;
 	}
 
 	/* Due to jack detect this should never happen */
@@ -783,7 +827,7 @@ static irqreturn_t arizona_micdet(int irq, void *data)
 	 * impedence then give up and report headphones.
 	 */
 	if (info->detecting && (val & 0x3f8)) {
-		if (info->jack_flips >= info->micd_num_modes) {
+		if (info->jack_flips >= info->micd_num_modes * 10) {
 			dev_dbg(arizona->dev, "Detected HP/line\n");
 			arizona_identify_headphone(info);
 
@@ -813,12 +857,17 @@ static irqreturn_t arizona_micdet(int irq, void *data)
 			lvl = val & ARIZONA_MICD_LVL_MASK;
 			lvl >>= ARIZONA_MICD_LVL_SHIFT;
 
-			for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
-				if (lvl & arizona_lvl_to_key[i].status)
-					input_report_key(info->input,
-							 arizona_lvl_to_key[i].report,
-							 1);
-			input_sync(info->input);
+			for (i = 0; i < info->num_micd_ranges; i++)
+				input_report_key(info->input,
+						 info->micd_ranges[i].key, 0);
+
+			WARN_ON(!lvl);
+			WARN_ON(ffs(lvl) - 1 >= info->num_micd_ranges);
+			if (lvl && ffs(lvl) - 1 < info->num_micd_ranges) {
+				key = info->micd_ranges[ffs(lvl) - 1].key;
+				input_report_key(info->input, key, 1);
+				input_sync(info->input);
+			}
 
 		} else if (info->detecting) {
 			dev_dbg(arizona->dev, "Headphone detected\n");
@@ -832,16 +881,41 @@ static irqreturn_t arizona_micdet(int irq, void *data)
 		}
 	} else {
 		dev_dbg(arizona->dev, "Mic button released\n");
-		for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
+		for (i = 0; i < info->num_micd_ranges; i++)
 			input_report_key(info->input,
-					 arizona_lvl_to_key[i].report, 0);
+					 info->micd_ranges[i].key, 0);
 		input_sync(info->input);
 		arizona_extcon_pulse_micbias(info);
 	}
 
 handled:
+	if (info->detecting)
+		schedule_delayed_work(&info->micd_timeout_work,
+				      msecs_to_jiffies(info->micd_timeout));
+
 	pm_runtime_mark_last_busy(info->dev);
 	mutex_unlock(&info->lock);
+}
+
+static irqreturn_t arizona_micdet(int irq, void *data)
+{
+	struct arizona_extcon_info *info = data;
+	struct arizona *arizona = info->arizona;
+	int debounce = arizona->pdata.micd_detect_debounce;
+
+	cancel_delayed_work_sync(&info->micd_detect_work);
+	cancel_delayed_work_sync(&info->micd_timeout_work);
+
+	mutex_lock(&info->lock);
+	if (!info->detecting)
+		debounce = 0;
+	mutex_unlock(&info->lock);
+
+	if (debounce)
+		schedule_delayed_work(&info->micd_detect_work,
+				      msecs_to_jiffies(debounce));
+	else
+		arizona_micd_detect(&info->micd_detect_work.work);
 
 	return IRQ_HANDLED;
 }
@@ -862,11 +936,13 @@ static irqreturn_t arizona_jackdet(int irq, void *data)
 	struct arizona_extcon_info *info = data;
 	struct arizona *arizona = info->arizona;
 	unsigned int val, present, mask;
+	bool cancelled_hp, cancelled_mic;
 	int ret, i;
 
-	pm_runtime_get_sync(info->dev);
+	cancelled_hp = cancel_delayed_work_sync(&info->hpdet_work);
+	cancelled_mic = cancel_delayed_work_sync(&info->micd_timeout_work);
 
-	cancel_delayed_work_sync(&info->hpdet_work);
+	pm_runtime_get_sync(info->dev);
 
 	mutex_lock(&info->lock);
 
@@ -887,7 +963,22 @@ static irqreturn_t arizona_jackdet(int irq, void *data)
 		return IRQ_NONE;
 	}
 
-	if ((val & mask) == present) {
+	val &= mask;
+	if (val == info->last_jackdet) {
+		dev_dbg(arizona->dev, "Suppressing duplicate JACKDET\n");
+		if (cancelled_hp)
+			schedule_delayed_work(&info->hpdet_work,
+					      msecs_to_jiffies(HPDET_DEBOUNCE));
+
+		if (cancelled_mic)
+			schedule_delayed_work(&info->micd_timeout_work,
+					      msecs_to_jiffies(info->micd_timeout));
+
+		goto out;
+	}
+	info->last_jackdet = val;
+
+	if (info->last_jackdet == present) {
 		dev_dbg(arizona->dev, "Detected jack\n");
 		ret = extcon_set_cable_state_(&info->edev,
 					      ARIZONA_CABLE_MECHANICAL, true);
@@ -904,7 +995,7 @@ static irqreturn_t arizona_jackdet(int irq, void *data)
 			arizona_start_mic(info);
 		} else {
 			schedule_delayed_work(&info->hpdet_work,
-					      msecs_to_jiffies(250));
+					      msecs_to_jiffies(HPDET_DEBOUNCE));
 		}
 
 		regmap_update_bits(arizona->regmap,
@@ -920,10 +1011,11 @@ static irqreturn_t arizona_jackdet(int irq, void *data)
 			info->hpdet_res[i] = 0;
 		info->mic = false;
 		info->hpdet_done = false;
+		info->hpdet_retried = false;
 
-		for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
+		for (i = 0; i < info->num_micd_ranges; i++)
 			input_report_key(info->input,
-					 arizona_lvl_to_key[i].report, 0);
+					 info->micd_ranges[i].key, 0);
 		input_sync(info->input);
 
 		ret = extcon_update_state(&info->edev, 0xffffffff, 0);
@@ -937,6 +1029,11 @@ static irqreturn_t arizona_jackdet(int irq, void *data)
 				   ARIZONA_MICD_CLAMP_DB | ARIZONA_JD1_DB);
 	}
 
+	if (arizona->pdata.micd_timeout)
+		info->micd_timeout = arizona->pdata.micd_timeout;
+	else
+		info->micd_timeout = DEFAULT_MICD_TIMEOUT;
+
 	/* Clear trig_sts to make sure DCVDD is not forced up */
 	regmap_write(arizona->regmap, ARIZONA_AOD_WKUP_AND_TRIG,
 		     ARIZONA_MICD_CLAMP_FALL_TRIG_STS |
@@ -944,6 +1041,7 @@ static irqreturn_t arizona_jackdet(int irq, void *data)
 		     ARIZONA_JD1_FALL_TRIG_STS |
 		     ARIZONA_JD1_RISE_TRIG_STS);
 
+out:
 	mutex_unlock(&info->lock);
 
 	pm_runtime_mark_last_busy(info->dev);
@@ -952,13 +1050,34 @@ static irqreturn_t arizona_jackdet(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
+/* Map a level onto a slot in the register bank */
+static void arizona_micd_set_level(struct arizona *arizona, int index,
+				   unsigned int level)
+{
+	int reg;
+	unsigned int mask;
+
+	reg = ARIZONA_MIC_DETECT_LEVEL_4 - (index / 2);
+
+	if (!(index % 2)) {
+		mask = 0x3f00;
+		level <<= 8;
+	} else {
+		mask = 0x3f;
+	}
+
+	/* Program the level itself */
+	regmap_update_bits(arizona->regmap, reg, mask, level);
+}
+
 static int arizona_extcon_probe(struct platform_device *pdev)
 {
 	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
 	struct arizona_pdata *pdata;
 	struct arizona_extcon_info *info;
+	unsigned int val;
 	int jack_irq_fall, jack_irq_rise;
-	int ret, mode, i;
+	int ret, mode, i, j;
 
 	if (!arizona->dapm || !arizona->dapm->card)
 		return -EPROBE_DEFER;
@@ -982,7 +1101,10 @@ static int arizona_extcon_probe(struct platform_device *pdev)
 	mutex_init(&info->lock);
 	info->arizona = arizona;
 	info->dev = &pdev->dev;
+	info->last_jackdet = ~(ARIZONA_MICD_CLAMP_STS | ARIZONA_JD1_STS);
 	INIT_DELAYED_WORK(&info->hpdet_work, arizona_hpdet_work);
+	INIT_DELAYED_WORK(&info->micd_detect_work, arizona_micd_detect);
+	INIT_DELAYED_WORK(&info->micd_timeout_work, arizona_micd_timeout_work);
 	platform_set_drvdata(pdev, info);
 
 	switch (arizona->type) {
@@ -1011,6 +1133,17 @@ static int arizona_extcon_probe(struct platform_device *pdev)
 		goto err;
 	}
 
+	info->input = devm_input_allocate_device(&pdev->dev);
+	if (!info->input) {
+		dev_err(arizona->dev, "Can't allocate input dev\n");
+		ret = -ENOMEM;
+		goto err_register;
+	}
+
+	info->input->name = "Headset";
+	info->input->phys = "arizona/extcon";
+	info->input->dev.parent = &pdev->dev;
+
 	if (pdata->num_micd_configs) {
 		info->micd_modes = pdata->micd_configs;
 		info->micd_num_modes = pdata->num_micd_configs;
@@ -1066,15 +1199,79 @@ static int arizona_extcon_probe(struct platform_device *pdev)
 				   arizona->pdata.micd_dbtime
 				   << ARIZONA_MICD_DBTIME_SHIFT);
 
+	BUILD_BUG_ON(ARRAY_SIZE(arizona_micd_levels) != 0x40);
+
+	if (arizona->pdata.num_micd_ranges) {
+		info->micd_ranges = pdata->micd_ranges;
+		info->num_micd_ranges = pdata->num_micd_ranges;
+	} else {
+		info->micd_ranges = micd_default_ranges;
+		info->num_micd_ranges = ARRAY_SIZE(micd_default_ranges);
+	}
+
+	if (arizona->pdata.num_micd_ranges > ARIZONA_MAX_MICD_RANGE) {
+		dev_err(arizona->dev, "Too many MICD ranges: %d\n",
+			arizona->pdata.num_micd_ranges);
+	}
+
+	if (info->num_micd_ranges > 1) {
+		for (i = 1; i < info->num_micd_ranges; i++) {
+			if (info->micd_ranges[i - 1].max >
+			    info->micd_ranges[i].max) {
+				dev_err(arizona->dev,
+					"MICD ranges must be sorted\n");
+				ret = -EINVAL;
+				goto err_input;
+			}
+		}
+	}
+
+	/* Disable all buttons by default */
+	regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_2,
+			   ARIZONA_MICD_LVL_SEL_MASK, 0x81);
+
+	/* Set up all the buttons the user specified */
+	for (i = 0; i < info->num_micd_ranges; i++) {
+		for (j = 0; j < ARRAY_SIZE(arizona_micd_levels); j++)
+			if (arizona_micd_levels[j] >= info->micd_ranges[i].max)
+				break;
+
+		if (j == ARRAY_SIZE(arizona_micd_levels)) {
+			dev_err(arizona->dev, "Unsupported MICD level %d\n",
+				info->micd_ranges[i].max);
+			ret = -EINVAL;
+			goto err_input;
+		}
+
+		dev_dbg(arizona->dev, "%d ohms for MICD threshold %d\n",
+			arizona_micd_levels[j], i);
+
+		arizona_micd_set_level(arizona, i, j);
+		input_set_capability(info->input, EV_KEY,
+				     info->micd_ranges[i].key);
+
+		/* Enable reporting of that range */
+		regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_2,
+				   1 << i, 1 << i);
+	}
+
+	/* Set all the remaining keys to a maximum */
+	for (; i < ARIZONA_MAX_MICD_RANGE; i++)
+		arizona_micd_set_level(arizona, i, 0x3f);
+
 	/*
 	 * If we have a clamp use it, activating in conjunction with
 	 * GPIO5 if that is connected for jack detect operation.
 	 */
 	if (info->micd_clamp) {
 		if (arizona->pdata.jd_gpio5) {
-			/* Put the GPIO into input mode */
+			/* Put the GPIO into input mode with optional pull */
+			val = 0xc101;
+			if (arizona->pdata.jd_gpio5_nopull)
+				val &= ~ARIZONA_GPN_PU;
+
 			regmap_write(arizona->regmap, ARIZONA_GPIO5_CTRL,
-				     0xc101);
+				     val);
 
 			regmap_update_bits(arizona->regmap,
 					   ARIZONA_MICD_CLAMP_CONTROL,
@@ -1093,20 +1290,6 @@ static int arizona_extcon_probe(struct platform_device *pdev)
 
 	arizona_extcon_set_mode(info, 0);
 
-	info->input = devm_input_allocate_device(&pdev->dev);
-	if (!info->input) {
-		dev_err(arizona->dev, "Can't allocate input dev\n");
-		ret = -ENOMEM;
-		goto err_register;
-	}
-
-	for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
-		input_set_capability(info->input, EV_KEY,
-				     arizona_lvl_to_key[i].report);
-	info->input->name = "Headset";
-	info->input->phys = "arizona/extcon";
-	info->input->dev.parent = &pdev->dev;
-
 	pm_runtime_enable(&pdev->dev);
 	pm_runtime_idle(&pdev->dev);
 	pm_runtime_get_sync(&pdev->dev);
diff --git a/drivers/mfd/wm5102-tables.c b/drivers/mfd/wm5102-tables.c
index a433f580aa4c..ca2aed6bc830 100644
--- a/drivers/mfd/wm5102-tables.c
+++ b/drivers/mfd/wm5102-tables.c
@@ -331,6 +331,10 @@ static const struct reg_default wm5102_reg_default[] = {
 	{ 0x000002A3, 0x1102 },   /* R675   - Mic Detect 1 */ 
 	{ 0x000002A4, 0x009F },   /* R676   - Mic Detect 2 */ 
 	{ 0x000002A5, 0x0000 },   /* R677   - Mic Detect 3 */ 
+	{ 0x000002A6, 0x3737 },   /* R678   - Mic Detect Level 1 */
+	{ 0x000002A7, 0x372C },   /* R679   - Mic Detect Level 2 */
+	{ 0x000002A8, 0x1422 },   /* R680   - Mic Detect Level 3 */
+	{ 0x000002A9, 0x030A },   /* R681   - Mic Detect Level 4 */
 	{ 0x000002C3, 0x0000 },   /* R707   - Mic noise mix control 1 */ 
 	{ 0x000002CB, 0x0000 },   /* R715   - Isolation control */ 
 	{ 0x000002D3, 0x0000 },   /* R723   - Jack detect analogue */ 
@@ -1090,6 +1094,10 @@ static bool wm5102_readable_register(struct device *dev, unsigned int reg)
 	case ARIZONA_MIC_DETECT_1:
 	case ARIZONA_MIC_DETECT_2:
 	case ARIZONA_MIC_DETECT_3:
+	case ARIZONA_MIC_DETECT_LEVEL_1:
+	case ARIZONA_MIC_DETECT_LEVEL_2:
+	case ARIZONA_MIC_DETECT_LEVEL_3:
+	case ARIZONA_MIC_DETECT_LEVEL_4:
 	case ARIZONA_MIC_NOISE_MIX_CONTROL_1:
 	case ARIZONA_ISOLATION_CONTROL:
 	case ARIZONA_JACK_DETECT_ANALOGUE:
diff --git a/include/linux/mfd/arizona/pdata.h b/include/linux/mfd/arizona/pdata.h
index 455c51d22d6b..a0f940987a3e 100644
--- a/include/linux/mfd/arizona/pdata.h
+++ b/include/linux/mfd/arizona/pdata.h
@@ -86,6 +86,11 @@ struct arizona_micd_config {
 	bool gpio;
 };
 
+struct arizona_micd_range {
+	int max;  /** Ohms */
+	int key;  /** Key to report to input layer */
+};
+
 struct arizona_pdata {
 	int reset;      /** GPIO controlling /RESET, if any */
 	int ldoena;     /** GPIO controlling LODENA, if any */
@@ -117,12 +122,21 @@ struct arizona_pdata {
 	/** GPIO5 is used for jack detection */
 	bool jd_gpio5;
 
+	/** Internal pull on GPIO5 is disabled when used for jack detection */
+	bool jd_gpio5_nopull;
+
 	/** Use the headphone detect circuit to identify the accessory */
 	bool hpdet_acc_id;
 
+	/** Check for line output with HPDET method */
+	bool hpdet_acc_id_line;
+
 	/** GPIO used for mic isolation with HPDET */
 	int hpdet_id_gpio;
 
+	/** Extra debounce timeout used during initial mic detection (ms) */
+	int micd_detect_debounce;
+
 	/** GPIO for mic detection polarity */
 	int micd_pol_gpio;
 
@@ -135,9 +149,16 @@ struct arizona_pdata {
 	/** Mic detect debounce level */
 	int micd_dbtime;
 
+	/** Mic detect timeout (ms) */
+	int micd_timeout;
+
 	/** Force MICBIAS on for mic detect */
 	bool micd_force_micbias;
 
+	/** Mic detect level parameters */
+	const struct arizona_micd_range *micd_ranges;
+	int num_micd_ranges;
+
 	/** Headset polarity configurations */
 	struct arizona_micd_config *micd_configs;
 	int num_micd_configs;
diff --git a/include/linux/mfd/arizona/registers.h b/include/linux/mfd/arizona/registers.h
index 340355136069..f43aa7c8d040 100644
--- a/include/linux/mfd/arizona/registers.h
+++ b/include/linux/mfd/arizona/registers.h
@@ -124,6 +124,10 @@
 #define ARIZONA_MIC_DETECT_1                     0x2A3
 #define ARIZONA_MIC_DETECT_2                     0x2A4
 #define ARIZONA_MIC_DETECT_3                     0x2A5
+#define ARIZONA_MIC_DETECT_LEVEL_1		 0x2A6
+#define ARIZONA_MIC_DETECT_LEVEL_2		 0x2A7
+#define ARIZONA_MIC_DETECT_LEVEL_3		 0x2A8
+#define ARIZONA_MIC_DETECT_LEVEL_4		 0x2A9
 #define ARIZONA_MIC_NOISE_MIX_CONTROL_1          0x2C3
 #define ARIZONA_ISOLATION_CONTROL                0x2CB
 #define ARIZONA_JACK_DETECT_ANALOGUE             0x2D3