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-rw-r--r--drivers/iio/accel/bmc150-accel-core.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/iio/accel/bmc150-accel-core.c b/drivers/iio/accel/bmc150-accel-core.c
index bf17aae66145..59b380dbf27f 100644
--- a/drivers/iio/accel/bmc150-accel-core.c
+++ b/drivers/iio/accel/bmc150-accel-core.c
@@ -67,6 +67,9 @@
#define BMC150_ACCEL_REG_PMU_BW 0x10
#define BMC150_ACCEL_DEF_BW 125
+#define BMC150_ACCEL_REG_RESET 0x14
+#define BMC150_ACCEL_RESET_VAL 0xB6
+
#define BMC150_ACCEL_REG_INT_MAP_0 0x19
#define BMC150_ACCEL_INT_MAP_0_BIT_SLOPE BIT(2)
@@ -1497,6 +1500,14 @@ static int bmc150_accel_chip_init(struct bmc150_accel_data *data)
int ret, i;
unsigned int val;
+ /*
+ * Reset chip to get it in a known good state. A delay of 1.8ms after
+ * reset is required according to the data sheets of supported chips.
+ */
+ regmap_write(data->regmap, BMC150_ACCEL_REG_RESET,
+ BMC150_ACCEL_RESET_VAL);
+ usleep_range(1800, 2500);
+
ret = regmap_read(data->regmap, BMC150_ACCEL_REG_CHIP_ID, &val);
if (ret < 0) {
dev_err(dev, "Error: Reading chip id\n");