iio: accel: bmi088: Add support for bmi085 accel

Add supports for BMI085, an Inertial Measurement Unit,
with an accelerometer and gyroscope.
The commit adds the accelerometer driver for the SPI interface.
The gyroscope part is already supported by the BMG160 driver.
Unlike BMI088, the BMI085 accelerometer ranges are +/-2, 4, 6,
and 8g, the scales are calculated as 9.8/32768*pow(2,reg41+1).
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Signed-off-by: LI Qingwu <Qing-wu.Li@leica-geosystems.com.cn>
Link: https://lore.kernel.org/r/20220526133359.2261928-5-Qing-wu.Li@leica-geosystems.com.cnSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/accel/bmi088-accel-core.c

@@ -465,6 +465,13 @@ static const struct iio_chan_spec bmi088_accel_channels[] = {
 };
 
 static const struct bmi088_accel_chip_info bmi088_accel_chip_info_tbl[] = {
+	[BOSCH_BMI085] = {
+		.name = "bmi085-accel",
+		.chip_id = 0x1F,
+		.channels = bmi088_accel_channels,
+		.num_channels = ARRAY_SIZE(bmi088_accel_channels),
+		.scale_table = {{0, 598}, {0, 1196}, {0, 2393}, {0, 4785}},
+	},
 	[BOSCH_BMI088] = {
 		.name = "bmi088-accel",
 		.chip_id = 0x1E,

drivers/iio/accel/bmi088-accel-spi.c

@@ -62,12 +62,14 @@ static void bmi088_accel_remove(struct spi_device *spi)
 }
 
 static const struct of_device_id bmi088_of_match[] = {
+	{ .compatible = "bosch,bmi085-accel" },
 	{ .compatible = "bosch,bmi088-accel" },
 	{}
 };
 MODULE_DEVICE_TABLE(of, bmi088_of_match);
 
 static const struct spi_device_id bmi088_accel_id[] = {
+	{"bmi085-accel",  BOSCH_BMI085},
 	{"bmi088-accel",  BOSCH_BMI088},
 	{}
 };

drivers/iio/accel/bmi088-accel.h

@@ -9,6 +9,7 @@
 struct device;
 
 enum bmi_device_type {
+	BOSCH_BMI085,
 	BOSCH_BMI088,
 	BOSCH_UNKNOWN,
 };