input: touchscreen: use polling mode in 88pm860x

index b3aebc2..fe12f61 100644
@@ -12,13 +12,25 @@
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/i2c.h>
+#include <linux/slab.h>
 #include <linux/input.h>
 #include <linux/mfd/88pm860x.h>
-#include <linux/slab.h>
 
 #define MEAS_LEN		(8)
 #define ACCURATE_BIT		(12)
 
+/*
+ * While 32KHz hardware timer is used for scheduler, we always assign HZ
+ * to 128. It means that 1 tick costs 7.8msec.
+ */
+#define MEASURE_INTERVAL_MS	(7)
+
+/* debounce register */
+#define DEBOUNCE		(0x0A)
+
+#define PD_DEBOUNCE_0MSEC	(0)
+#define PD_DEBOUNCE_MASK	(3)
+
 /* touch register */
 #define MEAS_EN3		(0x52)
 

@@ -39,22 +51,27 @@
 #define MEAS_TSIZ2_EN		(1 << 7)
 
 struct pm860x_touch {
-	struct input_dev *idev;
-	struct i2c_client *i2c;
-	struct pm860x_chip *chip;
-	int irq;
-	int res_x;		/* resistor of Xplate */
+	struct input_dev	*idev;
+	struct i2c_client	*i2c;
+	struct pm860x_chip	*chip;
+	struct delayed_work	poll_work;
+	struct mutex		lock;
+
+	int			irq;
+	int			res_x;		/* resistor of Xplate */
 };
 
-static irqreturn_t pm860x_touch_handler(int irq, void *data)
+static void pm860x_poll_work(struct work_struct *work)
 {
-	struct pm860x_touch *touch = data;
+	struct pm860x_touch *touch = container_of(work, struct pm860x_touch,
+						  poll_work.work);
 	struct pm860x_chip *chip = touch->chip;
+	int x, y, z1, z2, rt = 0;
+	int ret, pen_down, interval;
 	unsigned char buf[MEAS_LEN];
-	int x, y, pen_down;
-	int z1, z2, rt = 0;
-	int ret;
+	struct timeval start, end;
 
+	do_gettimeofday(&start);
 	ret = pm860x_bulk_read(touch->i2c, MEAS_TSIX_1, MEAS_LEN, buf);
 	if (ret < 0)
 		goto out;

@@ -77,30 +94,54 @@ static irqreturn_t pm860x_touch_handler(int irq, void *data)
 		input_report_abs(touch->idev, ABS_PRESSURE, rt);
 		input_report_key(touch->idev, BTN_TOUCH, 1);
 		dev_dbg(chip->dev, "pen down at [%d, %d].\n", x, y);
+
+		do_gettimeofday(&end);
+		interval = (end.tv_sec - start.tv_sec) * 1000000 +
+			(end.tv_usec - start.tv_usec) / 1000;
+		interval = (interval < MEASURE_INTERVAL_MS)
+			? (MEASURE_INTERVAL_MS - interval) : 0;
+		schedule_delayed_work(&touch->poll_work,
+				      msecs_to_jiffies(interval));
 	} else {
 		input_report_abs(touch->idev, ABS_PRESSURE, 0);
 		input_report_key(touch->idev, BTN_TOUCH, 0);
 		dev_dbg(chip->dev, "pen release\n");
+		mutex_unlock(&touch->lock);
 	}
 	input_sync(touch->idev);
 
 out:
+	return;
+}
+
+static irqreturn_t pm860x_touch_handler(int irq, void *data)
+{
+	struct pm860x_touch *touch = data;
+	int ret;
+
+	ret = pm860x_reg_read(touch->i2c, PM8607_STATUS_1);
+	dev_dbg(touch->chip->dev, "pen status:%d\n", (ret & PM8607_STATUS_PEN)
+		? 1 : 0);
+	if ((ret & PM8607_STATUS_PEN) == 0)
+		return IRQ_HANDLED;
+
+	mutex_lock(&touch->lock);
+	pm860x_poll_work(&touch->poll_work.work);
 	return IRQ_HANDLED;
 }
 
 static int pm860x_touch_open(struct input_dev *dev)
 {
 	struct pm860x_touch *touch = input_get_drvdata(dev);
-	int data, ret;
+	int data;
 
+	/* set debounce time with 0ms */
+	pm860x_set_bits(touch->i2c, DEBOUNCE, PD_DEBOUNCE_MASK,
+			PD_DEBOUNCE_0MSEC);
 	data = MEAS_PD_EN | MEAS_TSIX_EN | MEAS_TSIY_EN
 		| MEAS_TSIZ1_EN | MEAS_TSIZ2_EN;
-	ret = pm860x_set_bits(touch->i2c, MEAS_EN3, data, data);
-	if (ret < 0)
-		goto out;
+	pm860x_set_bits(touch->i2c, MEAS_EN3, data, data);
 	return 0;
-out:
-	return ret;
 }
 
 static void pm860x_touch_close(struct input_dev *dev)

@@ -152,16 +193,17 @@ static int __devinit pm860x_touch_probe(struct platform_device *pdev)
 	}
 
 	touch->idev->name = "88pm860x-touch";
-	touch->idev->phys = "88pm860x/input0";
+	touch->idev->phys = "88pm860x/input1";
 	touch->idev->id.bustype = BUS_I2C;
 	touch->idev->dev.parent = &pdev->dev;
 	touch->idev->open = pm860x_touch_open;
 	touch->idev->close = pm860x_touch_close;
 	touch->chip = chip;
 	touch->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
-	touch->irq = irq + chip->irq_base;
+	touch->irq = irq;
 	touch->res_x = pdata->res_x;
 	input_set_drvdata(touch->idev, touch);
+	mutex_init(&touch->lock);
 
 	ret = request_threaded_irq(touch->irq, NULL, pm860x_touch_handler,
 				   IRQF_ONESHOT, "touch", touch);

@@ -188,6 +230,7 @@ static int __devinit pm860x_touch_probe(struct platform_device *pdev)
 	}
 
 	platform_set_drvdata(pdev, touch);
+	INIT_DELAYED_WORK(&touch->poll_work, pm860x_poll_work);
 	return 0;
 out_rg:
 	free_irq(touch->irq, touch);

@@ -202,6 +245,7 @@ static int __devexit pm860x_touch_remove(struct platform_device *pdev)
 {
 	struct pm860x_touch *touch = platform_get_drvdata(pdev);
 
+	flush_scheduled_work();
 	input_unregister_device(touch->idev);
 	free_irq(touch->irq, touch);
 	platform_set_drvdata(pdev, NULL);

index fe12f61..ea7abaa 100644
@@ -14,6 +14,7 @@
 #include <linux/i2c.h>
 #include <linux/slab.h>
 #include <linux/input.h>
+#include <linux/mfd/core.h>
 #include <linux/mfd/88pm860x.h>
 
 #define MEAS_LEN		(8)

@@ -154,11 +155,40 @@ static void pm860x_touch_close(struct input_dev *dev)
 	pm860x_set_bits(touch->i2c, MEAS_EN3, data, 0);
 }
 
+static void __devinit pm860x_gpadc_init(struct i2c_client *i2c,
+					struct pm860x_touch_pdata *pdata)
+{
+	int data;
+
+	/* set GPADC MISC1 register */
+	data = 0;
+	data |= (pdata->gpadc_prebias << 1) & PM8607_GPADC_PREBIAS_MASK;
+	data |= (pdata->slot_cycle << 3) & PM8607_GPADC_SLOT_CYCLE_MASK;
+	data |= (pdata->off_scale << 5) & PM8607_GPADC_OFF_SCALE_MASK;
+	data |= (pdata->sw_cal << 7) & PM8607_GPADC_SW_CAL_MASK;
+	if (data)
+		pm860x_reg_write(i2c, PM8607_GPADC_MISC1, data);
+
+	/* set tsi prebias time */
+	if (pdata->tsi_prebias) {
+		data = pdata->tsi_prebias;
+		pm860x_reg_write(i2c, PM8607_TSI_PREBIAS, data);
+	}
+
+	/* set prebias & prechg time of pen detect */
+	data = 0;
+	data |= pdata->pen_prebias & PM8607_PD_PREBIAS_MASK;
+	data |= (pdata->pen_prechg << 5) & PM8607_PD_PRECHG_MASK;
+	if (data)
+		pm860x_reg_write(i2c, PM8607_PD_PREBIAS, data);
+
+	pm860x_set_bits(i2c, PM8607_GPADC_MISC1,
+			PM8607_GPADC_EN, PM8607_GPADC_EN);
+}
+
 static int __devinit pm860x_touch_probe(struct platform_device *pdev)
 {
 	struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
-	struct pm860x_platform_data *pm860x_pdata =		\
-				pdev->dev.parent->platform_data;
 	struct pm860x_touch_pdata *pdata = NULL;
 	struct pm860x_touch *touch;
 	int irq, ret;

@@ -169,13 +199,8 @@ static int __devinit pm860x_touch_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	if (!pm860x_pdata) {
-		dev_err(&pdev->dev, "platform data is missing\n");
-		return -EINVAL;
-	}
-
-	pdata = pm860x_pdata->touch;
-	if (!pdata) {
+	pdata = mfd_get_data(pdev);
+	if (pdata == NULL) {
 		dev_err(&pdev->dev, "touchscreen data is missing\n");
 		return -EINVAL;
 	}

@@ -229,6 +254,7 @@ static int __devinit pm860x_touch_probe(struct platform_device *pdev)
 		goto out_rg;
 	}
 
+	pm860x_gpadc_init(touch->i2c, pdata);
 	platform_set_drvdata(pdev, touch);
 	INIT_DELAYED_WORK(&touch->poll_work, pm860x_poll_work);
 	return 0;

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index c73ffdf..63d1c54 100644
@@ -57,6 +57,10 @@ static struct resource regulator_resources[] __initdata = {
 	{PM8607_ID_LDO15, PM8607_ID_LDO15, "ldo-15", IORESOURCE_IO,},
 };
 
+static struct resource rtc_resources[] __initdata = {
+	{PM8607_IRQ_RTC, PM8607_IRQ_RTC, "rtc", IORESOURCE_IRQ,},
+};
+
 static struct resource touch_resources[] __initdata = {
 	{PM8607_IRQ_PEN, PM8607_IRQ_PEN, "touch", IORESOURCE_IRQ,},
 };

@@ -126,6 +130,10 @@ static struct mfd_cell regulator_devs[] __initdata = {
 	{"88pm860x-regulator", 17,},
 };
 
+static struct mfd_cell rtc_devs[] __initdata = {
+	{"88pm860x-rtc", -1,},
+};
+
 static struct mfd_cell touch_devs[] __initdata = {
 	{"88pm860x-touch", -1,},
 };

@@ -148,6 +156,7 @@ static struct pm860x_led_pdata led_pdata[ARRAY_SIZE(led_devs)];
 static struct regulator_init_data regulator_pdata[ARRAY_SIZE(regulator_devs)];
 static struct pm860x_touch_pdata touch_pdata;
 static struct pm860x_power_pdata power_pdata;
+static struct pm860x_rtc_pdata rtc_pdata;
 
 struct pm860x_irq_data {
 	int	reg;

@@ -585,6 +594,26 @@ out:
 	return;
 }
 
+static void __devinit device_rtc_init(struct pm860x_chip *chip,
+				      struct i2c_client *i2c,
+				      struct pm860x_platform_data *pdata)
+{
+	int ret;
+
+	if ((pdata == NULL) || (pdata->rtc == NULL))
+		return;
+
+	memcpy(&rtc_pdata, pdata->rtc, sizeof(struct pm860x_rtc_pdata));
+	rtc_devs[0].mfd_data = &rtc_pdata;
+	rtc_devs[0].num_resources = ARRAY_SIZE(rtc_resources);
+	rtc_devs[0].resources = &rtc_resources[0];
+	ret = mfd_add_devices(chip->dev, 0, &rtc_devs[0],
+			      ARRAY_SIZE(rtc_devs), &rtc_resources[0],
+			      chip->irq_base);
+	if (ret < 0)
+		dev_err(chip->dev, "Failed to add rtc subdev\n");
+}
+
 static void __devinit device_touch_init(struct pm860x_chip *chip,
 					struct i2c_client *i2c,
 					struct pm860x_platform_data *pdata)

@@ -713,6 +742,7 @@ static void __devinit device_8607_init(struct pm860x_chip *chip,
 		goto out;
 
 	device_regulator_init(chip, i2c, pdata);
+	device_rtc_init(chip, i2c, pdata);
 	device_onkey_init(chip, i2c, pdata);
 	device_touch_init(chip, i2c, pdata);
 	device_power_init(chip, i2c, pdata);

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index 8fba797..63b4fb8 100644
@@ -330,6 +330,11 @@ struct pm860x_led_pdata {
 	unsigned long	flags;
 };
 
+struct pm860x_rtc_pdata {
+	int		(*sync)(unsigned int ticks);
+	int		vrtc;
+};
+
 struct pm860x_touch_pdata {
 	int		gpadc_prebias;
 	int		slot_cycle;

@@ -349,6 +354,7 @@ struct pm860x_power_pdata {
 struct pm860x_platform_data {
 	struct pm860x_backlight_pdata	*backlight;
 	struct pm860x_led_pdata		*led;
+	struct pm860x_rtc_pdata		*rtc;
 	struct pm860x_touch_pdata	*touch;
 	struct pm860x_power_pdata	*power;
 	struct regulator_init_data	*regulator;

index 3dca3c1..1abc77e 100644
@@ -50,9 +50,6 @@ static irqreturn_t pm860x_onkey_handler(int irq, void *data)
 	ret &= ONKEY_STATUS;
 	input_report_key(info->idev, KEY_POWER, ret);
 	input_sync(info->idev);
-
-	/* Enable 8-second long onkey detection */
-	pm860x_set_bits(info->i2c, PM8607_WAKEUP, 3, LONG_ONKEY_EN);
 	return IRQ_HANDLED;
 }
 

@@ -105,6 +102,9 @@ static int __devinit pm860x_onkey_probe(struct platform_device *pdev)
 	}
 
 	platform_set_drvdata(pdev, info);
+
+	/* Enable 8-second long onkey detection */
+	pm860x_set_bits(info->i2c, PM8607_WAKEUP, 3, LONG_ONKEY_EN);
 	return 0;
 
 out_irq:

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index f3b636d..0f0b58c 100644
@@ -36,6 +36,9 @@
 #define W1_THERM_DS18B20 	0x28
 #define W1_EEPROM_DS2431	0x2D
 #define W1_FAMILY_DS2760	0x30
+#define W1_BATTMON_DS2780	0x32
+#define W1_BATTMON_DS2781	0x3D
+#define W1_BATTMON_DS2783	0x34
 
 #define MAXNAMELEN		32
 

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