motion: Add bh1730 as a motion sensor

    - Add ROHM ambient light sensor driver
    - Add als sensor to motion sensors

    BRANCH=glados
    BUG=b:67022366
    TEST=This driver is tested in caroline
    Signed-off-by: yb.ha <ybha@samsung.com>

Change-Id: Ic73c50e17b412975f7850b7348ce310180f7a6eb
Reviewed-on: https://chromium-review.googlesource.com/784659
Commit-Ready: YongBeum Ha <ybha@samsung.com>
Tested-by: YongBeum Ha <ybha@samsung.com>
Reviewed-by: Gwendal Grignou <gwendal@google.com>

1 files changed, 91 insertions, 0 deletions

diff --git a/driver/als_bh1730.h b/driver/als_bh1730.h
new file mode 100644
index 0000000000..3cd8757822
--- /dev/null
+++ b/driver/als_bh1730.h
@@ -0,0 +1,91 @@
+/* Copyright 2017 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.
+ *
+ * Rohm BH1730 Ambient light sensor driver
+ */
+
+#ifndef __CROS_EC_ALS_BH1730_H
+#define __CROS_EC_ALS_BH1730_H
+
+/* I2C interface */
+#define BH1730_I2C_ADDR		(0x29 << 1)
+
+/* BH1730 registers */
+#define BH1730_CONTROL		0x80
+#define BH1730_TIMING		0x81
+#define BH1730_INTERRUPT	0x82
+#define BH1730_THLLOW		0x83
+#define BH1730_THLHIGH		0x84
+#define BH1730_THHLOW		0x85
+#define BH1730_THHHIGH		0x86
+#define BH1730_GAIN		0x87
+#define BH1730_OPART_ID		0x92
+#define BH1730_DATA0LOW		0x94
+#define BH1730_DATA0HIGH	0x95
+#define BH1730_DATA1LOW		0x96
+#define BH1730_DATA1HIGH	0x97
+/* Software reset */
+#define BH1730_RESET		0xE4
+
+/* Registers bits */
+#define BH1730_CONTROL_ADC_INTR_INACTIVE	(0x00 << 5)
+#define BH1730_CONTROL_ADC_INTR_ACTIVE		(0x01 << 5)
+#define BH1730_CONTROL_ADC_VALID		(0x01 << 4)
+#define BH1730_CONTROL_ONE_TIME_CONTINOUS	(0x00 << 3)
+#define BH1730_CONTROL_ONE_TIME_ONETIME		(0x01 << 3)
+#define BH1730_CONTROL_DATA_SEL_TYPE0_AND_1	(0x00 << 2)
+#define BH1730_CONTROL_DATA_SEL_TYPE0		(0x01 << 2)
+#define BH1730_CONTROL_ADC_EN_DISABLE		(0x00 << 1)
+#define BH1730_CONTROL_ADC_EN_ENABLE		(0x01 << 1)
+#define BH1730_CONTROL_POWER_DISABLE		(0x00 << 0)
+#define BH1730_CONTROL_POWER_ENABLE		(0x01 << 0)
+
+#define BH1730_GAIN_GAIN_X1_GAIN		(0x00 << 0)
+#define BH1730_GAIN_GAIN_X2_GAIN		(0x01 << 0)
+#define BH1730_GAIN_GAIN_X64_GAIN		(0x02 << 0)
+#define BH1730_GAIN_GAIN_X128_GAIN		(0x03 << 0)
+
+/* Sensor configuration */
+/* Select Gain */
+#define BH1730_CONF_GAIN BH1730_GAIN_GAIN_X64_GAIN
+#define BH1730_GAIN_DIV 64
+
+/* Select Itime, 0xDA is 102.6ms = 38*2.7ms */
+#define BH1730_CONF_ITIME 0xDA
+#define ITIME_MS_X_10 ((256 - BH1730_CONF_ITIME) * 27)
+#define ITIME_MS_X_1K (ITIME_MS_X_10*100)
+
+/* default Itime is about 10Hz */
+#define BH1730_10000_MHZ (10*1000)
+
+/*
+ * Use default lux calculation formula parameters if board specific
+ * parameters are not defined.
+ */
+#ifndef CONFIG_ALS_BH1730_LUXTH_PARAMS
+#define BH1730_LUXTH1_1K                260
+#define BH1730_LUXTH1_D0_1K             1290
+#define BH1730_LUXTH1_D1_1K             2733
+#define BH1730_LUXTH2_1K                550
+#define BH1730_LUXTH2_D0_1K             797
+#define BH1730_LUXTH2_D1_1K             859
+#define BH1730_LUXTH3_1K                1090
+#define BH1730_LUXTH3_D0_1K             510
+#define BH1730_LUXTH3_D1_1K             345
+#define BH1730_LUXTH4_1K                2130
+#define BH1730_LUXTH4_D0_1K             276
+#define BH1730_LUXTH4_D1_1K             130
+#endif
+
+#define BH1730_GET_DATA(_s)    ((struct bh1730_drv_data_t *)(_s)->drv_data)
+
+struct bh1730_drv_data_t {
+	int rate;
+	int last_value;
+};
+
+extern const struct accelgyro_drv bh1730_drv;
+
+#endif	/* __CROS_EC_ALS_BH1730_H */
+