Add support for enumerating the device through ACPI.
Signed-off-by: Laurentiu Palcu <laurentiu.pa...@intel.com>
---
Changes in v2:
* fix the unnecessary casting from const char * to char * and back;
Thank you Jonathan for the reviews,
laurentiu
drivers/staging/iio/light/isl29018.c | 46 +++++++++++++++++++++++++++++++-----
1 file changed, 40 insertions(+), 6 deletions(-)
diff --git a/drivers/staging/iio/light/isl29018.c
b/drivers/staging/iio/light/isl29018.c
index b50f126..65a35da 100644
--- a/drivers/staging/iio/light/isl29018.c
+++ b/drivers/staging/iio/light/isl29018.c
@@ -30,6 +30,7 @@
#include <linux/slab.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
+#include <linux/acpi.h>
#define CONVERSION_TIME_MS 100
@@ -656,12 +657,28 @@ static const struct chip_info chip_info_tbl[] = {
},
};
+static const char *isl29018_match_acpi_device(struct device *dev, int *data)
+{
+ const struct acpi_device_id *id;
+
+ id = acpi_match_device(dev->driver->acpi_match_table, dev);
+
+ if (!id)
+ return NULL;
+
+ *data = (int) id->driver_data;
+
+ return dev_name(dev);
+}
+
static int isl29018_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct isl29018_chip *chip;
struct iio_dev *indio_dev;
int err;
+ const char *name = NULL;
+ int dev_id = 0;
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip));
if (indio_dev == NULL) {
@@ -673,9 +690,17 @@ static int isl29018_probe(struct i2c_client *client,
i2c_set_clientdata(client, indio_dev);
chip->dev = &client->dev;
+ if (id) {
+ name = id->name;
+ dev_id = id->driver_data;
+ }
+
+ if (ACPI_HANDLE(&client->dev))
+ name = isl29018_match_acpi_device(&client->dev, &dev_id);
+
mutex_init(&chip->lock);
- chip->type = id->driver_data;
+ chip->type = dev_id;
chip->lux_scale = 1;
chip->lux_uscale = 0;
chip->range = 1000;
@@ -683,7 +708,7 @@ static int isl29018_probe(struct i2c_client *client,
chip->suspended = false;
chip->regmap = devm_regmap_init_i2c(client,
- chip_info_tbl[id->driver_data].regmap_cfg);
+ chip_info_tbl[dev_id].regmap_cfg);
if (IS_ERR(chip->regmap)) {
err = PTR_ERR(chip->regmap);
dev_err(chip->dev, "regmap initialization failed: %d\n", err);
@@ -694,10 +719,10 @@ static int isl29018_probe(struct i2c_client *client,
if (err)
return err;
- indio_dev->info = chip_info_tbl[id->driver_data].indio_info;
- indio_dev->channels = chip_info_tbl[id->driver_data].channels;
- indio_dev->num_channels = chip_info_tbl[id->driver_data].num_channels;
- indio_dev->name = id->name;
+ indio_dev->info = chip_info_tbl[dev_id].indio_info;
+ indio_dev->channels = chip_info_tbl[dev_id].channels;
+ indio_dev->num_channels = chip_info_tbl[dev_id].num_channels;
+ indio_dev->name = name;
indio_dev->dev.parent = &client->dev;
indio_dev->modes = INDIO_DIRECT_MODE;
err = devm_iio_device_register(&client->dev, indio_dev);
@@ -747,6 +772,14 @@ static SIMPLE_DEV_PM_OPS(isl29018_pm_ops,
isl29018_suspend, isl29018_resume);
#define ISL29018_PM_OPS NULL
#endif
+static const struct acpi_device_id isl29018_acpi_match[] = {
+ {"ISL29018", isl29018},
+ {"ISL29023", isl29023},
+ {"ISL29035", isl29035},
+ {},
+};
+MODULE_DEVICE_TABLE(acpi, isl29018_acpi_match);
+
static const struct i2c_device_id isl29018_id[] = {
{"isl29018", isl29018},
{"isl29023", isl29023},
@@ -768,6 +801,7 @@ static struct i2c_driver isl29018_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "isl29018",
+ .acpi_match_table = ACPI_PTR(isl29018_acpi_match),
.pm = ISL29018_PM_OPS,
.owner = THIS_MODULE,
.of_match_table = isl29018_of_match,
--
1.9.1
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