The hscdtd008a is similar to the AK8974:
Only the whoami value and some registers are different.
Signed-off-by: Nick Reitemeyer <nick.reitemeyer@xxxxxx>
---
drivers/iio/magnetometer/ak8974.c | 38 ++++++++++++++++++++++++-------
1 file changed, 30 insertions(+), 8 deletions(-)
diff --git a/drivers/iio/magnetometer/ak8974.c b/drivers/iio/magnetometer/ak8974.c
index d32996702110..ade4ed8f67d2 100644
--- a/drivers/iio/magnetometer/ak8974.c
+++ b/drivers/iio/magnetometer/ak8974.c
@@ -49,6 +49,7 @@
#define AK8974_WHOAMI_VALUE_AMI306 0x46
#define AK8974_WHOAMI_VALUE_AMI305 0x47
#define AK8974_WHOAMI_VALUE_AK8974 0x48
+#define AK8974_WHOAMI_VALUE_HSCDTD008A 0x49
#define AK8974_DATA_X 0x10
#define AK8974_DATA_Y 0x12
@@ -140,6 +141,12 @@
#define AK8974_INT_CTRL_PULSE BIT(1) /* 0 = latched; 1 = pulse (50 usec) */
#define AK8974_INT_CTRL_RESDEF (AK8974_INT_CTRL_XYZEN | AK8974_INT_CTRL_POL)
+/* HSCDTD008A-specific control register */
+#define HSCDTD008A_CTRL4 0x1E
+#define HSCDTD008A_CTRL4_MMD BIT(7) /* must be set to 1 */
+#define HSCDTD008A_CTRL4_RANGE BIT(4) /* 0 = 14-bit output; 1 = 15-bit output */
+#define HSCDTD008A_CTRL4_RESDEF (HSCDTD008A_CTRL4_MMD | HSCDTD008A_CTRL4_RANGE)
+
/* The AMI305 has elaborate FW version and serial number registers */
#define AMI305_VER 0xE8
#define AMI305_SN 0xEA
@@ -241,10 +248,17 @@ static int ak8974_reset(struct ak8974 *ak8974)
ret = regmap_write(ak8974->map, AK8974_CTRL3, AK8974_CTRL3_RESDEF);
if (ret)
return ret;
- ret = regmap_write(ak8974->map, AK8974_INT_CTRL,
- AK8974_INT_CTRL_RESDEF);
- if (ret)
- return ret;
+ if (ak8974->variant != AK8974_WHOAMI_VALUE_HSCDTD008A) {
+ ret = regmap_write(ak8974->map, AK8974_INT_CTRL,
+ AK8974_INT_CTRL_RESDEF);
+ if (ret)
+ return ret;
+ } else {
+ ret = regmap_write(ak8974->map, HSCDTD008A_CTRL4,
+ HSCDTD008A_CTRL4_RESDEF);
+ if (ret)
+ return ret;
+ }
/* After reset, power off is default state */
return ak8974_set_power(ak8974, AK8974_PWR_OFF);
@@ -267,6 +281,8 @@ static int ak8974_configure(struct ak8974 *ak8974)
if (ret)
return ret;
}
+ if (ak8974->variant == AK8974_WHOAMI_VALUE_HSCDTD008A)
+ return 0;
ret = regmap_write(ak8974->map, AK8974_INT_CTRL, AK8974_INT_CTRL_POL);
if (ret)
return ret;
@@ -495,6 +511,10 @@ static int ak8974_detect(struct ak8974 *ak8974)
name = "ak8974";
dev_info(&ak8974->i2c->dev, "detected AK8974\n");
break;
+ case AK8974_WHOAMI_VALUE_HSCDTD008A:
+ name = "hscdtd008a";
+ dev_info(&ak8974->i2c->dev, "detected hscdtd008a\n");
+ break;
default:
dev_err(&ak8974->i2c->dev, "unsupported device (%02x) ",
whoami);
@@ -674,18 +694,18 @@ static bool ak8974_writeable_reg(struct device *dev, unsigned int reg)
case AK8974_INT_CTRL:
case AK8974_INT_THRES:
case AK8974_INT_THRES + 1:
+ return true;
case AK8974_PRESET:
case AK8974_PRESET + 1:
- return true;
+ return ak8974->variant != AK8974_WHOAMI_VALUE_HSCDTD008A;
case AK8974_OFFSET_X:
case AK8974_OFFSET_X + 1:
case AK8974_OFFSET_Y:
case AK8974_OFFSET_Y + 1:
case AK8974_OFFSET_Z:
case AK8974_OFFSET_Z + 1:
- if (ak8974->variant == AK8974_WHOAMI_VALUE_AK8974)
- return true;
- return false;
+ return ak8974->variant == AK8974_WHOAMI_VALUE_AK8974 ||
+ ak8974->variant == AK8974_WHOAMI_VALUE_HSCDTD008A;
case AMI305_OFFSET_X:
case AMI305_OFFSET_X + 1:
case AMI305_OFFSET_Y:
@@ -926,12 +946,14 @@ static const struct i2c_device_id ak8974_id[] = {
{"ami305", 0 },
{"ami306", 0 },
{"ak8974", 0 },
+ {"hscdtd008a", 0 },
{}
};
MODULE_DEVICE_TABLE(i2c, ak8974_id);
static const struct of_device_id ak8974_of_match[] = {
{ .compatible = "asahi-kasei,ak8974", },
+ { .compatible = "alps,hscdtd008a", },
{}
};
MODULE_DEVICE_TABLE(of, ak8974_of_match);
--
2.26.0
