diff options
author | Hans de Goede <hdegoede@redhat.com> | 2021-05-23 19:00:57 +0200 |
---|---|---|
committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2021-06-09 20:51:19 +0100 |
commit | 42d1c1dc0f91cae51781b4c5ccdb26989d7521dc (patch) | |
tree | be12517289dcf4ffe6fee654c9f1c36c14f529b2 /drivers/iio | |
parent | f407e2dca0f559621114eeaf657880d83f237fbd (diff) | |
download | linux-42d1c1dc0f91cae51781b4c5ccdb26989d7521dc.tar.bz2 |
iio: accel: bmc150: Move check for second ACPI device into a separate function
Move the check for a second ACPI device for BOSC0200 ACPI fwnodes into
a new bmc150_acpi_dual_accel_probe() helper function.
This is a preparation patch for adding support for a new "DUAL250E" ACPI
Hardware-ID (HID) used on some devices.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20210523170103.176958-4-hdegoede@redhat.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio')
-rw-r--r-- | drivers/iio/accel/bmc150-accel-i2c.c | 80 |
1 files changed, 51 insertions, 29 deletions
diff --git a/drivers/iio/accel/bmc150-accel-i2c.c b/drivers/iio/accel/bmc150-accel-i2c.c index 2afaae0294ee..f7cb40f481ef 100644 --- a/drivers/iio/accel/bmc150-accel-i2c.c +++ b/drivers/iio/accel/bmc150-accel-i2c.c @@ -21,6 +21,52 @@ #include "bmc150-accel.h" +#ifdef CONFIG_ACPI +static const struct acpi_device_id bmc150_acpi_dual_accel_ids[] = { + {"BOSC0200"}, + { } +}; + +/* + * Some acpi_devices describe 2 accelerometers in a single ACPI device, + * try instantiating a second i2c_client for an I2cSerialBusV2 ACPI resource + * with index 1. + */ +static void bmc150_acpi_dual_accel_probe(struct i2c_client *client) +{ + struct acpi_device *adev = ACPI_COMPANION(&client->dev); + struct i2c_client *second_dev; + struct i2c_board_info board_info = { + .type = "bmc150_accel", + /* + * The 2nd accel sits in the base of 2-in-1s. Note this name is + * static, as there should never be more then 1 BOSC0200 ACPI + * node with 2 accelerometers in it. + */ + .dev_name = "BOSC0200:base", + .fwnode = client->dev.fwnode, + .irq = -ENOENT, + }; + + if (acpi_match_device_ids(adev, bmc150_acpi_dual_accel_ids)) + return; + + second_dev = i2c_acpi_new_device(&client->dev, 1, &board_info); + if (!IS_ERR(second_dev)) + bmc150_set_second_device(client, second_dev); +} + +static void bmc150_acpi_dual_accel_remove(struct i2c_client *client) +{ + struct i2c_client *second_dev = bmc150_get_second_device(client); + + i2c_unregister_device(second_dev); +} +#else +static void bmc150_acpi_dual_accel_probe(struct i2c_client *client) {} +static void bmc150_acpi_dual_accel_remove(struct i2c_client *client) {} +#endif + static int bmc150_accel_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -30,7 +76,6 @@ static int bmc150_accel_probe(struct i2c_client *client, i2c_check_functionality(client->adapter, I2C_FUNC_I2C) || i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_READ_I2C_BLOCK); - struct acpi_device __maybe_unused *adev; int ret; regmap = devm_regmap_init_i2c(client, &bmc150_regmap_conf); @@ -47,41 +92,18 @@ static int bmc150_accel_probe(struct i2c_client *client, return ret; /* - * Some BOSC0200 acpi_devices describe 2 accelerometers in a single ACPI - * device, try instantiating a second i2c_client for an I2cSerialBusV2 - * ACPI resource with index 1. The !id check avoids recursion when - * bmc150_accel_probe() gets called for the second client. + * The !id check avoids recursion when probe() gets called + * for the second client. */ -#ifdef CONFIG_ACPI - adev = ACPI_COMPANION(&client->dev); - if (!id && adev && strcmp(acpi_device_hid(adev), "BOSC0200") == 0) { - struct i2c_board_info board_info = { - .type = "bmc150_accel", - /* - * The 2nd accel sits in the base of 2-in-1s. Note this - * name is static, as there should never be more then 1 - * BOSC0200 ACPI node with 2 accelerometers in it. - */ - .dev_name = "BOSC0200:base", - .fwnode = client->dev.fwnode, - .irq = -ENOENT, - }; - struct i2c_client *second_dev; - - second_dev = i2c_acpi_new_device(&client->dev, 1, &board_info); - if (!IS_ERR(second_dev)) - bmc150_set_second_device(client, second_dev); - } -#endif + if (!id && has_acpi_companion(&client->dev)) + bmc150_acpi_dual_accel_probe(client); return 0; } static int bmc150_accel_remove(struct i2c_client *client) { - struct i2c_client *second_dev = bmc150_get_second_device(client); - - i2c_unregister_device(second_dev); + bmc150_acpi_dual_accel_remove(client); return bmc150_accel_core_remove(&client->dev); } |