staging: iio: tsl2x7x: bugfixes

TAOS (version 9a) tsl2x7x driver change / bug fix.

Fixed - removed decimal multiplications.
        Added missing 'static' declarations
        Fixed _read_raw case logic to allow reading of _PROCESSED IIO_LIGHT
	Replaced udelay with mdelay to accomodate eabi.
Signed-off-by: Jon Brenner <jbrenner@taosinc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/iio/light/tsl2x7x_core.c

@@ -130,6 +130,8 @@
 		(IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING) | \
 		IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING)),
 
+#define TSL2X7X_MIN_ITIME 3
+
 /* TAOS txx2x7x Device family members */
 enum {
 	tsl2571,
@@ -277,7 +279,7 @@ enum {
 	ALSPRX2,
 };
 
-const u8 device_channel_config[] = {
+static const u8 device_channel_config[] = {
 	ALS,
 	PRX,
 	PRX,
@@ -778,7 +780,7 @@ static int tsl2x7x_chip_on(struct iio_dev *indio_dev)
 		}
 	}
 
-	udelay(3000);	/* Power-on settling time */
+	mdelay(3);	/* Power-on settling time */
 
 	/* NOW enable the ADC
 	 * initialize the desired mode of operation */
@@ -853,6 +855,7 @@ static int tsl2x7x_chip_off(struct iio_dev *indio_dev)
  * put device back into proper state, and unlock
  * resource.
  */
+static
 int tsl2x7x_invoke_change(struct iio_dev *indio_dev)
 {
 	struct tsl2X7X_chip *chip = iio_priv(indio_dev);
@@ -1021,7 +1024,7 @@ static ssize_t tsl2x7x_als_time_show(struct device *dev,
 	int y, z;
 
 	y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
-	z = y * 2.72;
+	z = y * TSL2X7X_MIN_ITIME;
 	y /= 1000;
 	z %= 1000;
 
@@ -1092,7 +1095,7 @@ static ssize_t tsl2x7x_als_persistence_show(struct device *dev,
 
 	/* Determine integration time */
 	y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
-	z = y * 2.72;
+	z = y * TSL2X7X_MIN_ITIME;
 	filter_delay = z * (chip->tsl2x7x_settings.persistence & 0x0F);
 	y = (filter_delay / 1000);
 	z = (filter_delay % 1000);
@@ -1114,7 +1117,7 @@ static ssize_t tsl2x7x_als_persistence_store(struct device *dev,
 
 	result.fract /= 1000;
 	y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
-	z = y * 2.72;
+	z = y * TSL2X7X_MIN_ITIME;
 
 	filter_delay =
 		DIV_ROUND_UP(((result.integer * 1000) + result.fract), z);
@@ -1138,7 +1141,7 @@ static ssize_t tsl2x7x_prox_persistence_show(struct device *dev,
 
 	/* Determine integration time */
 	y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.prx_time) + 1;
-	z = y * 2.72;
+	z = y * TSL2X7X_MIN_ITIME;
 	filter_delay = z * ((chip->tsl2x7x_settings.persistence & 0xF0) >> 4);
 	y = (filter_delay / 1000);
 	z = (filter_delay % 1000);
@@ -1160,7 +1163,7 @@ static ssize_t tsl2x7x_prox_persistence_store(struct device *dev,
 
 	result.fract /= 1000;
 	y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.prx_time) + 1;
-	z = y * 2.72;
+	z = y * TSL2X7X_MIN_ITIME;
 
 	filter_delay =
 		DIV_ROUND_UP(((result.integer * 1000) + result.fract), z);
@@ -1389,13 +1392,20 @@ static int tsl2x7x_read_raw(struct iio_dev *indio_dev,
 	struct tsl2X7X_chip *chip = iio_priv(indio_dev);
 
 	switch (mask) {
-	case IIO_CHAN_INFO_RAW:
+	case IIO_CHAN_INFO_PROCESSED:
 		switch (chan->type) {
 		case IIO_LIGHT:
 			tsl2x7x_get_lux(indio_dev);
 			*val = chip->als_cur_info.lux;
 			ret = IIO_VAL_INT;
 			break;
+		default:
+			return -EINVAL;
+			break;
+		}
+		break;
+	case IIO_CHAN_INFO_RAW:
+		switch (chan->type) {
 		case IIO_INTENSITY:
 			tsl2x7x_get_lux(indio_dev);
 			if (chan->channel == 0)