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iio: accel: mc3230: add multiple devices support

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Refactor code to support multiple generations of MCUBE devices by
defining name, chip id and product code in mc3230_chip_info struct.

Signed-off-by: Vasiliy Doylov <nekodevelopper@gmail.com>
Link: https://patch.msgid.link/20250116-mainlining-mc3510c-v4-4-a41308b85ec2@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Vasiliy Doylov
2025-01-16 16:52:45 +03:00
committed by Jonathan Cameron
parent c7fee7653a
commit 4e78ce08db
1 changed files with 38 additions and 14 deletions
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52
drivers/iio/accel/mc3230.c
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@@ -22,20 +22,29 @@
#define MC3230_MODE_OPCON_STANDBY 0x03
#define MC3230_REG_CHIP_ID 0x18
#define MC3230_CHIP_ID 0x01
#define MC3230_REG_PRODUCT_CODE 0x3b
#define MC3230_PRODUCT_CODE 0x19
/*
* The accelerometer has one measurement range:
*
* -1.5g - +1.5g (8-bit, signed)
*
* scale = (1.5 + 1.5) * 9.81 / (2^8 - 1) = 0.115411765
*/
static const int mc3230_nscale = 115411765;
struct mc3230_chip_info {
const char *name;
const u8 chip_id;
const u8 product_code;
const int scale;
};
static const struct mc3230_chip_info mc3230_chip_info = {
.name = "mc3230",
.chip_id = 0x01,
.product_code = 0x19,
/* (1.5 + 1.5) * 9.81 / (2^8 - 1) = 0.115411765 */
.scale = 115411765,
};
#define MC3230_CHANNEL(reg, axis) { \
.type = IIO_ACCEL, \
@@ -48,6 +57,7 @@ static const int mc3230_nscale = 115411765;
}
struct mc3230_data {
const struct mc3230_chip_info *chip_info;
struct i2c_client *client;
struct iio_mount_matrix orientation;
};
@@ -111,7 +121,7 @@ static int mc3230_read_raw(struct iio_dev *indio_dev,
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
*val = 0;
*val2 = mc3230_nscale;
*val2 = data->chip_info->scale;
return IIO_VAL_INT_PLUS_NANO;
default:
return -EINVAL;
@@ -127,15 +137,28 @@ static int mc3230_probe(struct i2c_client *client)
int ret;
struct iio_dev *indio_dev;
struct mc3230_data *data;
const struct mc3230_chip_info *chip_info;
chip_info = i2c_get_match_data(client);
if (chip_info == NULL) {
dev_err(&client->dev, "failed to get match data");
return -ENODATA;
}
/* First check chip-id and product-id */
ret = i2c_smbus_read_byte_data(client, MC3230_REG_CHIP_ID);
if (ret != MC3230_CHIP_ID)
return (ret < 0) ? ret : -ENODEV;
if (ret != chip_info->chip_id) {
dev_info(&client->dev,
"chip id check fail: 0x%x != 0x%x !\n",
ret, chip_info->chip_id);
}
ret = i2c_smbus_read_byte_data(client, MC3230_REG_PRODUCT_CODE);
if (ret != MC3230_PRODUCT_CODE)
return (ret < 0) ? ret : -ENODEV;
if (ret != chip_info->product_code) {
dev_info(&client->dev,
"product code check fail: 0x%x != 0x%x !\n",
ret, chip_info->product_code);
}
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
if (!indio_dev) {
@@ -144,11 +167,12 @@ static int mc3230_probe(struct i2c_client *client)
}
data = iio_priv(indio_dev);
data->chip_info = chip_info;
data->client = client;
i2c_set_clientdata(client, indio_dev);
indio_dev->info = &mc3230_info;
indio_dev->name = "mc3230";
indio_dev->name = chip_info->name;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->channels = mc3230_channels;
indio_dev->num_channels = ARRAY_SIZE(mc3230_channels);
@@ -200,13 +224,13 @@ static int mc3230_resume(struct device *dev)
static DEFINE_SIMPLE_DEV_PM_OPS(mc3230_pm_ops, mc3230_suspend, mc3230_resume);
static const struct i2c_device_id mc3230_i2c_id[] = {
{ "mc3230" },
{}
{ "mc3230", (kernel_ulong_t)&mc3230_chip_info },
{ }
};
MODULE_DEVICE_TABLE(i2c, mc3230_i2c_id);
static const struct of_device_id mc3230_of_match[] = {
{ .compatible = "mcube,mc3230" },
{ .compatible = "mcube,mc3230", &mc3230_chip_info },
{ }
};
MODULE_DEVICE_TABLE(of, mc3230_of_match);