summaryrefslogtreecommitdiffstats
path: root/drivers/iio
diff options
context:
space:
mode:
authorLinus Walleij <linus.walleij@linaro.org>2014-08-07 08:16:00 +0100
committerJonathan Cameron <jic23@kernel.org>2014-07-11 21:09:49 +0100
commit2d7768a872b73a7105d6355948dae0acff72f061 (patch)
tree1605eb22aedafe0a30e7cac78177f16a4b80e703 /drivers/iio
parent3b1cae7c2c2b801b8530db07a02587bc1a41b3fe (diff)
downloadop-kernel-dev-2d7768a872b73a7105d6355948dae0acff72f061.zip
op-kernel-dev-2d7768a872b73a7105d6355948dae0acff72f061.tar.gz
iio: st_sensors: add devicetree probing support
The I2C devices that make up the STMicroelectronics MEMS sensors may be sneakily enabled by cleverly giving the device node the same name as a string match from the platform device ID table. However the right method is to use the compatible string. On detection, the ST sensors use the ID string to probe and instatiate the right sensor driver, so pass the kernel-internal ID string in the .data field of the OF match table, and set the I2C client name to this name when a compatible match is used. This avoids having misc Linux-specific strings floating around in the device tree. Cc: Lee Jones <lee.jones@linaro.org> Cc: Denis CIOCCA <denis.ciocca@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio')
-rw-r--r--drivers/iio/accel/st_accel_i2c.c51
-rw-r--r--drivers/iio/common/st_sensors/st_sensors_i2c.c30
-rw-r--r--drivers/iio/gyro/st_gyro_i2c.c39
-rw-r--r--drivers/iio/magnetometer/st_magn_i2c.c23
-rw-r--r--drivers/iio/pressure/st_pressure_i2c.c23
5 files changed, 166 insertions, 0 deletions
diff --git a/drivers/iio/accel/st_accel_i2c.c b/drivers/iio/accel/st_accel_i2c.c
index d7bedbd..7164aef 100644
--- a/drivers/iio/accel/st_accel_i2c.c
+++ b/drivers/iio/accel/st_accel_i2c.c
@@ -18,6 +18,55 @@
#include <linux/iio/common/st_sensors_i2c.h>
#include "st_accel.h"
+#ifdef CONFIG_OF
+static const struct of_device_id st_accel_of_match[] = {
+ {
+ .compatible = "st,lsm303dlh-accel",
+ .data = LSM303DLH_ACCEL_DEV_NAME,
+ },
+ {
+ .compatible = "st,lsm303dlhc-accel",
+ .data = LSM303DLHC_ACCEL_DEV_NAME,
+ },
+ {
+ .compatible = "st,lis3dh-accel",
+ .data = LIS3DH_ACCEL_DEV_NAME,
+ },
+ {
+ .compatible = "st,lsm330d-accel",
+ .data = LSM330D_ACCEL_DEV_NAME,
+ },
+ {
+ .compatible = "st,lsm330dl-accel",
+ .data = LSM330DL_ACCEL_DEV_NAME,
+ },
+ {
+ .compatible = "st,lsm330dlc-accel",
+ .data = LSM330DLC_ACCEL_DEV_NAME,
+ },
+ {
+ .compatible = "st,lis331dlh-accel",
+ .data = LIS331DLH_ACCEL_DEV_NAME,
+ },
+ {
+ .compatible = "st,lsm303dl-accel",
+ .data = LSM303DL_ACCEL_DEV_NAME,
+ },
+ {
+ .compatible = "st,lsm303dlm-accel",
+ .data = LSM303DLM_ACCEL_DEV_NAME,
+ },
+ {
+ .compatible = "st,lsm330-accel",
+ .data = LSM330_ACCEL_DEV_NAME,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, st_accel_of_match);
+#else
+#define st_accel_of_match NULL
+#endif
+
static int st_accel_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -31,6 +80,7 @@ static int st_accel_i2c_probe(struct i2c_client *client,
adata = iio_priv(indio_dev);
adata->dev = &client->dev;
+ st_sensors_of_i2c_probe(client, st_accel_of_match);
st_sensors_i2c_configure(indio_dev, client, adata);
@@ -67,6 +117,7 @@ static struct i2c_driver st_accel_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "st-accel-i2c",
+ .of_match_table = of_match_ptr(st_accel_of_match),
},
.probe = st_accel_i2c_probe,
.remove = st_accel_i2c_remove,
diff --git a/drivers/iio/common/st_sensors/st_sensors_i2c.c b/drivers/iio/common/st_sensors/st_sensors_i2c.c
index 38af944..bb6f308 100644
--- a/drivers/iio/common/st_sensors/st_sensors_i2c.c
+++ b/drivers/iio/common/st_sensors/st_sensors_i2c.c
@@ -12,6 +12,7 @@
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/iio/iio.h>
+#include <linux/of_device.h>
#include <linux/iio/common/st_sensors_i2c.h>
@@ -76,6 +77,35 @@ void st_sensors_i2c_configure(struct iio_dev *indio_dev,
}
EXPORT_SYMBOL(st_sensors_i2c_configure);
+#ifdef CONFIG_OF
+/**
+ * st_sensors_of_i2c_probe() - device tree probe for ST I2C sensors
+ * @client: the I2C client device for the sensor
+ * @match: the OF match table for the device, containing compatible strings
+ * but also a .data field with the corresponding internal kernel name
+ * used by this sensor.
+ *
+ * In effect this function matches a compatible string to an internal kernel
+ * name for a certain sensor device, so that the rest of the autodetection can
+ * rely on that name from this point on. I2C client devices will be renamed
+ * to match the internal kernel convention.
+ */
+void st_sensors_of_i2c_probe(struct i2c_client *client,
+ const struct of_device_id *match)
+{
+ const struct of_device_id *of_id;
+
+ of_id = of_match_device(match, &client->dev);
+ if (!of_id)
+ return;
+
+ /* The name from the OF match takes precedence if present */
+ strncpy(client->name, of_id->data, sizeof(client->name));
+ client->name[sizeof(client->name) - 1] = '\0';
+}
+EXPORT_SYMBOL(st_sensors_of_i2c_probe);
+#endif
+
MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
MODULE_DESCRIPTION("STMicroelectronics ST-sensors i2c driver");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/gyro/st_gyro_i2c.c b/drivers/iio/gyro/st_gyro_i2c.c
index 23c12f3..8fa0ad2 100644
--- a/drivers/iio/gyro/st_gyro_i2c.c
+++ b/drivers/iio/gyro/st_gyro_i2c.c
@@ -18,6 +18,43 @@
#include <linux/iio/common/st_sensors_i2c.h>
#include "st_gyro.h"
+#ifdef CONFIG_OF
+static const struct of_device_id st_gyro_of_match[] = {
+ {
+ .compatible = "st,l3g4200d-gyro",
+ .data = L3G4200D_GYRO_DEV_NAME,
+ },
+ {
+ .compatible = "st,lsm330d-gyro",
+ .data = LSM330D_GYRO_DEV_NAME,
+ },
+ {
+ .compatible = "st,lsm330dl-gyro",
+ .data = LSM330DL_GYRO_DEV_NAME,
+ },
+ {
+ .compatible = "st,lsm330dlc-gyro",
+ .data = LSM330DLC_GYRO_DEV_NAME,
+ },
+ {
+ .compatible = "st,l3gd20-gyro",
+ .data = L3GD20_GYRO_DEV_NAME,
+ },
+ {
+ .compatible = "st,l3g4is-gyro",
+ .data = L3G4IS_GYRO_DEV_NAME,
+ },
+ {
+ .compatible = "st,lsm330-gyro",
+ .data = LSM330_GYRO_DEV_NAME,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, st_gyro_of_match);
+#else
+#define st_gyro_of_match NULL
+#endif
+
static int st_gyro_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -31,6 +68,7 @@ static int st_gyro_i2c_probe(struct i2c_client *client,
gdata = iio_priv(indio_dev);
gdata->dev = &client->dev;
+ st_sensors_of_i2c_probe(client, st_gyro_of_match);
st_sensors_i2c_configure(indio_dev, client, gdata);
@@ -65,6 +103,7 @@ static struct i2c_driver st_gyro_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "st-gyro-i2c",
+ .of_match_table = of_match_ptr(st_gyro_of_match),
},
.probe = st_gyro_i2c_probe,
.remove = st_gyro_i2c_remove,
diff --git a/drivers/iio/magnetometer/st_magn_i2c.c b/drivers/iio/magnetometer/st_magn_i2c.c
index 892e0fe..6892500 100644
--- a/drivers/iio/magnetometer/st_magn_i2c.c
+++ b/drivers/iio/magnetometer/st_magn_i2c.c
@@ -18,6 +18,27 @@
#include <linux/iio/common/st_sensors_i2c.h>
#include "st_magn.h"
+#ifdef CONFIG_OF
+static const struct of_device_id st_magn_of_match[] = {
+ {
+ .compatible = "st,lsm303dlhc-magn",
+ .data = LSM303DLHC_MAGN_DEV_NAME,
+ },
+ {
+ .compatible = "st,lsm303dlm-magn",
+ .data = LSM303DLM_MAGN_DEV_NAME,
+ },
+ {
+ .compatible = "st,lis3mdl-magn",
+ .data = LIS3MDL_MAGN_DEV_NAME,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, st_magn_of_match);
+#else
+#define st_magn_of_match NULL
+#endif
+
static int st_magn_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -31,6 +52,7 @@ static int st_magn_i2c_probe(struct i2c_client *client,
mdata = iio_priv(indio_dev);
mdata->dev = &client->dev;
+ st_sensors_of_i2c_probe(client, st_magn_of_match);
st_sensors_i2c_configure(indio_dev, client, mdata);
@@ -61,6 +83,7 @@ static struct i2c_driver st_magn_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "st-magn-i2c",
+ .of_match_table = of_match_ptr(st_magn_of_match),
},
.probe = st_magn_i2c_probe,
.remove = st_magn_i2c_remove,
diff --git a/drivers/iio/pressure/st_pressure_i2c.c b/drivers/iio/pressure/st_pressure_i2c.c
index 3cd73e3..acaf165 100644
--- a/drivers/iio/pressure/st_pressure_i2c.c
+++ b/drivers/iio/pressure/st_pressure_i2c.c
@@ -18,6 +18,27 @@
#include <linux/iio/common/st_sensors_i2c.h>
#include "st_pressure.h"
+#ifdef CONFIG_OF
+static const struct of_device_id st_press_of_match[] = {
+ {
+ .compatible = "st,lps001wp-press",
+ .data = LPS001WP_PRESS_DEV_NAME,
+ },
+ {
+ .compatible = "st,lps25h-press",
+ .data = LPS25H_PRESS_DEV_NAME,
+ },
+ {
+ .compatible = "st,lps331ap-press",
+ .data = LPS331AP_PRESS_DEV_NAME,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, st_press_of_match);
+#else
+#define st_press_of_match NULL
+#endif
+
static int st_press_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -31,6 +52,7 @@ static int st_press_i2c_probe(struct i2c_client *client,
pdata = iio_priv(indio_dev);
pdata->dev = &client->dev;
+ st_sensors_of_i2c_probe(client, st_press_of_match);
st_sensors_i2c_configure(indio_dev, client, pdata);
@@ -60,6 +82,7 @@ static struct i2c_driver st_press_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "st-press-i2c",
+ .of_match_table = of_match_ptr(st_press_of_match),
},
.probe = st_press_i2c_probe,
.remove = st_press_i2c_remove,
OpenPOWER on IntegriCloud