[PATCH v4 4/4] iio: magnetometer: ak8975: Add AK09118 support

Barnabás Czémán
2024-08-18T22:29:51Z

From: Danila Tikhonov <danila@jiaxyga.com>

Add additional AK09118 to the magnetometer driver which has the same
register mapping and scaling as the AK09112 device.

Signed-off-by: Danila Tikhonov <danila@jiaxyga.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
---
drivers/iio/magnetometer/Kconfig | 2 +-
drivers/iio/magnetometer/ak8975.c | 37 +++++++++++++++++++++++++++++++++++++
2 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/magnetometer/Kconfig b/drivers/iio/magnetometer/Kconfig
index cd2917d71904..8eb718f5e50f 100644
--- a/drivers/iio/magnetometer/Kconfig
+++ b/drivers/iio/magnetometer/Kconfig
@@ -39,7 +39,7 @@ config AK8975
select IIO_TRIGGERED_BUFFER
help
Say yes here to build support for Asahi Kasei AK8975, AK8963,
- AK09911, AK09912 or AK09916 3-Axis Magnetometer.
+ AK09911, AK09912, AK09916 or AK09918 3-Axis Magnetometer.

To compile this driver as a module, choose M here: the module
will be called ak8975.
diff --git a/drivers/iio/magnetometer/ak8975.c b/drivers/iio/magnetometer/ak8975.c
index 2fa6721aa66f..0eb0da9d6787 100644
--- a/drivers/iio/magnetometer/ak8975.c
+++ b/drivers/iio/magnetometer/ak8975.c
@@ -78,6 +78,7 @@
*/
#define AK09912_REG_WIA1 0x00
#define AK09912_REG_WIA2 0x01
+#define AK09918_DEVICE_ID 0x0C
#define AK09916_DEVICE_ID 0x09
#define AK09912_DEVICE_ID 0x04
#define AK09911_DEVICE_ID 0x05
@@ -209,6 +210,7 @@ enum asahi_compass_chipset {
AK09911,
AK09912,
AK09916,
+ AK09918,
};

enum ak_ctrl_reg_addr {
@@ -371,6 +373,34 @@ static const struct ak_def ak_def_array[] = {
AK09912_REG_HXL,
AK09912_REG_HYL,
AK09912_REG_HZL},
+ },
+ [AK09918] = {
+ /* ak09918 is register compatible with ak09912 this is for avoid
+ * unknown id messages.
+ */
+ .type = AK09918,
+ .raw_to_gauss = ak09912_raw_to_gauss,
+ .range = 32752,
+ .ctrl_regs = {
+ AK09912_REG_ST1,
+ AK09912_REG_ST2,
+ AK09912_REG_CNTL2,
+ AK09912_REG_ASAX,
+ AK09912_MAX_REGS},
+ .ctrl_masks = {
+ AK09912_REG_ST1_DRDY_MASK,
+ AK09912_REG_ST2_HOFL_MASK,
+ 0,
+ AK09912_REG_CNTL2_MODE_MASK},
+ .ctrl_modes = {
+ AK09912_REG_CNTL_MODE_POWER_DOWN,
+ AK09912_REG_CNTL_MODE_ONCE,
+ AK09912_REG_CNTL_MODE_SELF_TEST,
+ AK09912_REG_CNTL_MODE_FUSE_ROM},
+ .data_regs = {
+ AK09912_REG_HXL,
+ AK09912_REG_HYL,
+ AK09912_REG_HZL},
}
};

@@ -452,6 +482,7 @@ static int ak8975_who_i_am(struct i2c_client *client,
/*
* Signature for each device:
* Device | WIA1 | WIA2
+ * AK09918 | DEVICE_ID_| AK09918_DEVICE_ID
* AK09916 | DEVICE_ID_| AK09916_DEVICE_ID
* AK09912 | DEVICE_ID | AK09912_DEVICE_ID
* AK09911 | DEVICE_ID | AK09911_DEVICE_ID
@@ -484,6 +515,10 @@ static int ak8975_who_i_am(struct i2c_client *client,
if (wia_val[1] == AK09916_DEVICE_ID)
return 0;
break;
+ case AK09918:
+ if (wia_val[1] == AK09918_DEVICE_ID)
+ return 0;
+ break;
}

dev_info(&client->dev, "Device ID %x is unknown.\n", wia_val[1]);
@@ -1070,6 +1105,7 @@ static const struct i2c_device_id ak8975_id[] = {
{"ak09911", (kernel_ulong_t)&ak_def_array[AK09911] },
{"ak09912", (kernel_ulong_t)&ak_def_array[AK09912] },
{"ak09916", (kernel_ulong_t)&ak_def_array[AK09916] },
+ {"ak09918", (kernel_ulong_t)&ak_def_array[AK09918] },
{}
};
MODULE_DEVICE_TABLE(i2c, ak8975_id);
@@ -1084,6 +1120,7 @@ static const struct of_device_id ak8975_of_match[] = {
{ .compatible = "asahi-kasei,ak09912", .data = &ak_def_array[AK09912] },
{ .compatible = "ak09912", .data = &ak_def_array[AK09912] },
{ .compatible = "asahi-kasei,ak09916", .data = &ak_def_array[AK09916] },
+ { .compatible = "asahi-kasei,ak09918", .data = &ak_def_array[AK09918] },
{}
};
MODULE_DEVICE_TABLE(of, ak8975_of_match);

--
2.46.0