Merge "Removing auto-scaling on ALS integration time" into android-3.10-bringup

1 files changed, 44 insertions, 5 deletions

diff --git a/drivers/iio/light/cm3391.c b/drivers/iio/light/cm3391.c
index abe8b8e7f5c..8049446d98a 100644
--- a/drivers/iio/light/cm3391.c
+++ b/drivers/iio/light/cm3391.c
@@ -53,7 +53,7 @@
 
 #define CM3391_CMD_CS_IT_SHIFT		4
 #define CM3391_CMD_CS_IT_MASK		(BIT(4) | BIT(5) | BIT(6))
-#define CM3391_CMD_CS_IT_DEFAULT	(0x01 << CM3391_CMD_CS_IT_SHIFT)
+#define CM3391_CMD_CS_IT_DEFAULT	(0x04 << CM3391_CMD_CS_IT_SHIFT)
 
 #define CM3391_CMD_CS_HS_SHIFT		BIT(3)
 
@@ -69,7 +69,8 @@
 #define CM3391_THRESHOLD_PERCENT	10	/* 10 percent */
 
 #define CM3391_MLUX_PER_BIT_DEFAULT	550
-#define CM3391_MLUX_PER_BIT_BASE_IT	100000
+#define CM3391_MLUX_PER_BIT_BASE_IT	800000	
+
 
 static const struct {
 	int val;
@@ -90,6 +91,7 @@ static const int CM3391_cs_it_values[] = {
 struct cm3391_cs_info {
 	u32 id;
 	int regs_bmp;
+	int auto_it_enabled;
 	int calibscale;
 	int mlux_per_bit;
 	int mlux_per_bit_base_it;
@@ -102,8 +104,9 @@ struct cm3391_cs_info {
 static struct cm3391_cs_info cm3391_cs_info_default = {
 	.id = 3391,
 	.regs_bmp = 0x0F,
-	.calibscale = CM3391_CALIBSCALE_DEFAULT,
-	.mlux_per_bit = CM3391_MLUX_PER_BIT_DEFAULT,
+	.auto_it_enabled = 0,
+	.calibscale = 		CM3391_CALIBSCALE_DEFAULT,
+	.mlux_per_bit = 	CM3391_MLUX_PER_BIT_DEFAULT,
 	.mlux_per_bit_base_it = CM3391_MLUX_PER_BIT_BASE_IT,
 	.cs_it_bits = CM3391_cs_it_bits,
 	.cs_it_values = CM3391_cs_it_values,
@@ -299,6 +302,9 @@ void cm3391_autoit(struct cm3391_chip *chip, u16 als_raw)
 	int i;
 	int update;
 	s32 ret;
+	
+	if(!chip->cs_info->auto_it_enabled)
+		return;
 
 	cs_it = chip->conf_regs[CM3391_REG_ADDR_CMD];
 	cs_it &= CM3391_CMD_CS_IT_MASK;
@@ -321,6 +327,7 @@ void cm3391_autoit(struct cm3391_chip *chip, u16 als_raw)
 	}
 
 	if (update) {
+//printk(KERN_INFO "ALS readings are too high/low changing to:%i als_read:%i", i, als_raw)
 		cs_it = cm3391_cs_it_scales[i].it;
 		cs_it <<= CM3391_CMD_CS_IT_SHIFT;
 
@@ -433,7 +440,7 @@ static int cm3391_get_lux(struct cm3391_chip *chip)
 	cs_it = val * 1000000 + val2;
 	lux = (__force u64)cs_info->mlux_per_bit;
 	lux *= cs_info->mlux_per_bit_base_it;
-	lux = div_u64(lux, cs_it);
+	lux = div_u64(lux,cs_it);
 
 	/* Get als_raw */
 	ret = i2c_smbus_read_word_data(client, CM3391_REG_ADDR_ALS);
@@ -509,6 +516,34 @@ static int cm3391_write_raw(struct iio_dev *indio_dev,
 
 	return -EINVAL;
 }
+static ssize_t cm3391_set_enable_auto_it(struct device *dev,
+	  struct device_attribute *attr, const char *buf, size_t size)
+{
+	int ret;
+	int val;
+        struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct cm3391_chip *chip = iio_priv(indio_dev);
+	struct cm3391_cs_info *cs_info = chip->cs_info;
+	ret = sscanf(buf, "%i", &val);
+	if(ret != 1){
+	  return -EINVAL;
+	}
+
+	cs_info->auto_it_enabled = val;
+
+	return size;
+}
+
+static ssize_t cm3391_get_enable_auto_it(struct device *dev,
+			struct device_attribute *attr, char *buf)
+{
+        struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct cm3391_chip *chip = iio_priv(indio_dev);
+	struct cm3391_cs_info *cs_info = chip->cs_info;
+	int len;
+	len = sprintf(buf, "%i\n", cs_info->auto_it_enabled);
+	return len;
+}
 
 /**
  * cm3391_get_it_available() - Get available CS IT value
@@ -666,8 +701,12 @@ static const struct iio_chan_spec cm3391_channels[] = {
 static IIO_DEVICE_ATTR(in_illuminance_integration_time_available,
 			S_IRUGO, cm3391_get_it_available, NULL, 0);
 
+static IIO_DEVICE_ATTR(auto_it,
+			S_IRUGO | S_IWUGO, cm3391_get_enable_auto_it, cm3391_set_enable_auto_it, 0);
+
 static struct attribute *cm3391_attributes[] = {
 	&iio_dev_attr_in_illuminance_integration_time_available.dev_attr.attr,
+	&iio_dev_attr_auto_it.dev_attr.attr,
 	NULL,
 };