Add support to probe st_accel sensors on i2c bus using ACPI. Compatible
strings are not avaialable on ACPI based systems.
Signed-off-by: Shrirang Bagul <shrirang.ba...@canonical.com>
---
drivers/iio/accel/st_accel.h | 18 ++++++++++
drivers/iio/accel/st_accel_i2c.c | 73 +++++++++++++++++++++++++++-------------
2 files changed, 67 insertions(+), 24 deletions(-)
diff --git a/drivers/iio/accel/st_accel.h b/drivers/iio/accel/st_accel.h
index 7c23168..3ad44ce 100644
--- a/drivers/iio/accel/st_accel.h
+++ b/drivers/iio/accel/st_accel.h
@@ -14,6 +14,24 @@
#include <linux/types.h>
#include <linux/iio/common/st_sensors.h>
+enum st_accel_type {
+ LSM303DLH,
+ LSM303DLHC,
+ LIS3DH,
+ LSM330D,
+ LSM330DL,
+ LSM330DLC,
+ LIS331DLH,
+ LSM303DL,
+ LSM303DLM,
+ LSM330,
+ LSM303AGR,
+ LIS2DH12,
+ LIS3L02DQ,
+ LNG2DM,
+ ST_ACCEL_MAX,
+};
+
#define H3LIS331DL_DRIVER_NAME "h3lis331dl_accel"
#define LIS3LV02DL_ACCEL_DEV_NAME "lis3lv02dl_accel"
#define LSM303DLHC_ACCEL_DEV_NAME "lsm303dlhc_accel"
diff --git a/drivers/iio/accel/st_accel_i2c.c b/drivers/iio/accel/st_accel_i2c.c
index c0f8867..2840649 100644
--- a/drivers/iio/accel/st_accel_i2c.c
+++ b/drivers/iio/accel/st_accel_i2c.c
@@ -11,6 +11,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
+#include <linux/acpi.h>
#include <linux/i2c.h>
#include <linux/iio/iio.h>
@@ -95,25 +96,67 @@ MODULE_DEVICE_TABLE(of, st_accel_of_match);
#define st_accel_of_match NULL
#endif
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id st_accel_acpi_match[] = {
+ {"SMO8A90", LNG2DM},
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, st_accel_acpi_match);
+#else
+#define st_accel_acpi_match NULL
+#endif
+
+static const struct i2c_device_id st_accel_id_table[] = {
+ { LSM303DLH_ACCEL_DEV_NAME, LSM303DLH },
+ { LSM303DLHC_ACCEL_DEV_NAME, LSM303DLHC },
+ { LIS3DH_ACCEL_DEV_NAME, LIS3DH },
+ { LSM330D_ACCEL_DEV_NAME, LSM330D },
+ { LSM330DL_ACCEL_DEV_NAME, LSM330DL },
+ { LSM330DLC_ACCEL_DEV_NAME, LSM330DLC },
+ { LIS331DLH_ACCEL_DEV_NAME, LIS331DLH },
+ { LSM303DL_ACCEL_DEV_NAME, LSM303DL },
+ { LSM303DLM_ACCEL_DEV_NAME, LSM303DLM },
+ { LSM330_ACCEL_DEV_NAME, LSM330 },
+ { LSM303AGR_ACCEL_DEV_NAME, LSM303AGR },
+ { LIS2DH12_ACCEL_DEV_NAME, LIS2DH12 },
+ { LIS3L02DQ_ACCEL_DEV_NAME, LIS3L02DQ },
+ { LNG2DM_ACCEL_DEV_NAME, LNG2DM },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, st_accel_id_table);
+
static int st_accel_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct iio_dev *indio_dev;
struct st_sensor_data *adata;
- int err;
+ int ret;
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*adata));
if (!indio_dev)
return -ENOMEM;
adata = iio_priv(indio_dev);
- st_sensors_of_i2c_probe(client, st_accel_of_match);
+
+ if (client->dev.of_node) {
+ st_sensors_of_i2c_probe(client, st_accel_of_match);
+ } else if (ACPI_HANDLE(&client->dev)) {
+ ret = st_sensors_match_acpi_device(&client->dev);
+ if ((ret < 0) || (ret >= ST_ACCEL_MAX))
+ return -ENODEV;
+
+ strncpy(client->name, st_accel_id_table[ret].name,
+ sizeof(client->name));
+ client->name[sizeof(client->name) - 1] = '\0';
+ } else if (!id)
+ return -ENODEV;
+
st_sensors_i2c_configure(indio_dev, client, adata);
- err = st_accel_common_probe(indio_dev);
- if (err < 0)
- return err;
+ ret = st_accel_common_probe(indio_dev);
+ if (ret < 0)
+ return ret;
return 0;
}
@@ -125,29 +168,11 @@ static int st_accel_i2c_remove(struct i2c_client *client)
return 0;
}
-static const struct i2c_device_id st_accel_id_table[] = {
- { LSM303DLH_ACCEL_DEV_NAME },
- { LSM303DLHC_ACCEL_DEV_NAME },
- { LIS3DH_ACCEL_DEV_NAME },
- { LSM330D_ACCEL_DEV_NAME },
- { LSM330DL_ACCEL_DEV_NAME },
- { LSM330DLC_ACCEL_DEV_NAME },
- { LIS331DLH_ACCEL_DEV_NAME },
- { LSM303DL_ACCEL_DEV_NAME },
- { LSM303DLM_ACCEL_DEV_NAME },
- { LSM330_ACCEL_DEV_NAME },
- { LSM303AGR_ACCEL_DEV_NAME },
- { LIS2DH12_ACCEL_DEV_NAME },
- { LIS3L02DQ_ACCEL_DEV_NAME },
- { LNG2DM_ACCEL_DEV_NAME },
- {},
-};
-MODULE_DEVICE_TABLE(i2c, st_accel_id_table);
-
static struct i2c_driver st_accel_driver = {
.driver = {
.name = "st-accel-i2c",
.of_match_table = of_match_ptr(st_accel_of_match),
+ .acpi_match_table = ACPI_PTR(st_accel_acpi_match),
},
.probe = st_accel_i2c_probe,
.remove = st_accel_i2c_remove,
--
2.9.3
