On 19/03/14 16:56, Srinivas Pandruvada wrote:
Added capability so that this device can be enumerated via ACPI.
This is simple enough that I'm going to rely on my limited knowledge of ACPI and
take it as is.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxxxxxxxx>
Applied to the togreg branch of iio.git
Thanks,
Jonathan
---
drivers/iio/magnetometer/ak8975.c | 40 ++++++++++++++++++++++++++++++++++++---
1 file changed, 37 insertions(+), 3 deletions(-)
diff --git a/drivers/iio/magnetometer/ak8975.c b/drivers/iio/magnetometer/ak8975.c
index aa7682d..09ea5c4 100644
--- a/drivers/iio/magnetometer/ak8975.c
+++ b/drivers/iio/magnetometer/ak8975.c
@@ -31,6 +31,7 @@
#include <linux/bitops.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
+#include <linux/acpi.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
@@ -475,6 +476,27 @@ static const struct iio_info ak8975_info = {
.driver_module = THIS_MODULE,
};
+static const struct acpi_device_id ak_acpi_match[] = {
+ {"AK8975", AK8975},
+ {"AK8963", AK8963},
+ {"INVN6500", AK8963},
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, ak_acpi_match);
+
+static char *ak8975_match_acpi_device(struct device *dev,
+ enum asahi_compass_chipset *chipset)
+{
+ const struct acpi_device_id *id;
+
+ id = acpi_match_device(dev->driver->acpi_match_table, dev);
+ if (!id)
+ return NULL;
+ *chipset = (int)id->driver_data;
+
+ return (char *)dev_name(dev);
+}
+
static int ak8975_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -482,6 +504,7 @@ static int ak8975_probe(struct i2c_client *client,
struct iio_dev *indio_dev;
int eoc_gpio;
int err;
+ char *name = NULL;
/* Grab and set up the supplied GPIO. */
if (client->dev.platform_data)
@@ -519,8 +542,18 @@ static int ak8975_probe(struct i2c_client *client,
data->eoc_gpio = eoc_gpio;
data->eoc_irq = 0;
- data->chipset = (enum asahi_compass_chipset)(id->driver_data);
- dev_dbg(&client->dev, "Asahi compass chip %s\n", id->name);
+ /* id will be NULL when enumerated via ACPI */
+ if (id) {
+ data->chipset =
+ (enum asahi_compass_chipset)(id->driver_data);
+ name = (char *) id->name;
+ } else if (ACPI_HANDLE(&client->dev))
+ name = ak8975_match_acpi_device(&client->dev, &data->chipset);
+ else {
+ err = -ENOSYS;
+ goto exit_free_iio;
+ }
+ dev_dbg(&client->dev, "Asahi compass chip %s\n", name);
/* Perform some basic start-of-day setup of the device. */
err = ak8975_setup(client);
@@ -537,7 +570,7 @@ static int ak8975_probe(struct i2c_client *client,
indio_dev->num_channels = ARRAY_SIZE(ak8975_channels);
indio_dev->info = &ak8975_info;
indio_dev->modes = INDIO_DIRECT_MODE;
-
+ indio_dev->name = name;
err = iio_device_register(indio_dev);
if (err < 0)
goto exit_free_iio;
@@ -592,6 +625,7 @@ static struct i2c_driver ak8975_driver = {
.driver = {
.name = "ak8975",
.of_match_table = ak8975_of_match,
+ .acpi_match_table = ACPI_PTR(ak_acpi_match),
},
.probe = ak8975_probe,
.remove = ak8975_remove,
--
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