1 files changed, 49 insertions, 0 deletions
diff --git a/driver/als_al3010.c b/driver/als_al3010.c
new file mode 100644
index 0000000000..b129dc2f57
--- /dev/null
+++ b/driver/als_al3010.c
@@ -0,0 +1,49 @@
+/* Copyright 2015 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ * Dyna-Image AL3010 light sensor driver
+ */
+
+#include "driver/als_al3010.h"
+#include "i2c.h"
+
+/**
+ * Initialise AL3010 light sensor.
+ */
+int al3010_init(void)
+{
+	int ret;
+
+	ret = i2c_write8(I2C_PORT_ALS, AL3010_I2C_ADDR,
+			 AL3010_REG_CONFIG, AL3010_GAIN << 4);
+	if (ret)
+		return ret;
+
+	return i2c_write8(I2C_PORT_ALS, AL3010_I2C_ADDR,
+			  AL3010_REG_SYSTEM, AL3010_ENABLE);
+}
+
+/**
+ * Read AL3010 light sensor data.
+ */
+int al3010_read_lux(int *lux, int af)
+{
+	int ret;
+	int val;
+	long long val64;
+
+	ret = i2c_read16(I2C_PORT_ALS, AL3010_I2C_ADDR,
+			 AL3010_REG_DATA_LOW, &val);
+
+	if (ret)
+		return ret;
+
+	val64 = val;
+	val64 = (val64 * AL3010_GAIN_SCALE) / 10000;
+	val = val64 * af / 100;
+
+	*lux = val;
+
+	return EC_SUCCESS;
+}