diff options
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/imu/kmx61.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/drivers/iio/imu/kmx61.c b/drivers/iio/imu/kmx61.c index 5231d8f3b167..efb2f8b450c1 100644 --- a/drivers/iio/imu/kmx61.c +++ b/drivers/iio/imu/kmx61.c @@ -13,10 +13,13 @@ #include <linux/module.h> #include <linux/i2c.h> +#include <linux/acpi.h> +#include <linux/gpio/consumer.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #define KMX61_DRV_NAME "kmx61" +#define KMX61_GPIO_NAME "kmx61_int" #define KMX61_REG_WHO_AM_I 0x00 @@ -573,6 +576,44 @@ static const struct iio_info kmx61_mag_info = { .attrs = &kmx61_mag_attribute_group, }; +static const char *kmx61_match_acpi_device(struct device *dev) +{ + const struct acpi_device_id *id; + + id = acpi_match_device(dev->driver->acpi_match_table, dev); + if (!id) + return NULL; + return dev_name(dev); +} + +static int kmx61_gpio_probe(struct i2c_client *client, struct kmx61_data *data) +{ + struct device *dev; + struct gpio_desc *gpio; + int ret; + + if (!client) + return -EINVAL; + + dev = &client->dev; + + /* data ready gpio interrupt pin */ + gpio = devm_gpiod_get_index(dev, KMX61_GPIO_NAME, 0); + if (IS_ERR(gpio)) { + dev_err(dev, "acpi gpio get index failed\n"); + return PTR_ERR(gpio); + } + + ret = gpiod_direction_input(gpio); + if (ret) + return ret; + + ret = gpiod_to_irq(gpio); + + dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret); + return ret; +} + static struct iio_dev *kmx61_indiodev_setup(struct kmx61_data *data, const struct iio_info *info, const struct iio_chan_spec *chan, @@ -613,6 +654,13 @@ static int kmx61_probe(struct i2c_client *client, mutex_init(&data->lock); + if (id) + name = id->name; + else if (ACPI_HANDLE(&client->dev)) + name = kmx61_match_acpi_device(&client->dev); + else + return -ENODEV; + data->acc_indio_dev = kmx61_indiodev_setup(data, &kmx61_acc_info, kmx61_acc_channels, @@ -633,6 +681,9 @@ static int kmx61_probe(struct i2c_client *client, if (ret < 0) return ret; + if (client->irq < 0) + client->irq = kmx61_gpio_probe(client, data); + ret = iio_device_register(data->acc_indio_dev); if (ret < 0) { dev_err(&client->dev, "Failed to register acc iio device\n"); @@ -668,6 +719,13 @@ static int kmx61_remove(struct i2c_client *client) return 0; } +static const struct acpi_device_id kmx61_acpi_match[] = { + {"KMX61021", 0}, + {} +}; + +MODULE_DEVICE_TABLE(acpi, kmx61_acpi_match); + static const struct i2c_device_id kmx61_id[] = { {"kmx611021", 0}, {} @@ -678,6 +736,7 @@ MODULE_DEVICE_TABLE(i2c, kmx61_id); static struct i2c_driver kmx61_driver = { .driver = { .name = KMX61_DRV_NAME, + .acpi_match_table = ACPI_PTR(kmx61_acpi_match), }, .probe = kmx61_probe, .remove = kmx61_remove, |