[linux-yocto] [PATCH 5/5] iio: adc: ti-ads1015: add support for acpi

[tuomas . katila]

From: Tuomas Katila <tuomas.kat...@intel.com>

Add support for acpi platform configuration.

Signed-off-by: Tuomas Katila <tuomas.kat...@intel.com>
---
 drivers/iio/adc/ti-ads1015.c | 34 +++++++++++++++++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/adc/ti-ads1015.c b/drivers/iio/adc/ti-ads1015.c
index 6f75a4aa67c1..4a4463f74098 100644
--- a/drivers/iio/adc/ti-ads1015.c
+++ b/drivers/iio/adc/ti-ads1015.c
@@ -21,6 +21,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/mutex.h>
 #include <linux/delay.h>
+#include <linux/acpi.h>
 
 #include <linux/i2c/ads1015.h>
 
@@ -568,11 +569,23 @@ static void ads1015_get_channels_config(struct i2c_client 
*client)
        }
 }
 
+static const int ads1015_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 0;
+
+        return id->driver_data;
+}
+
 static int ads1015_probe(struct i2c_client *client,
                         const struct i2c_device_id *id)
 {
        struct iio_dev *indio_dev;
        struct ads1015_data *data;
+       int driver_data;
        int ret;
 
        indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
@@ -589,7 +602,13 @@ static int ads1015_probe(struct i2c_client *client,
        indio_dev->name = ADS1015_DRV_NAME;
        indio_dev->modes = INDIO_DIRECT_MODE;
 
-       switch (id->driver_data) {
+       if (ACPI_HANDLE(&client->dev)) {
+               driver_data = ads1015_match_acpi_device(&client->dev);
+       } else {
+               driver_data = id->driver_data;
+       }
+
+       switch (driver_data) {
        case ADS1015:
                indio_dev->channels = ads1015_channels;
                indio_dev->num_channels = ARRAY_SIZE(ads1015_channels);
@@ -620,6 +639,7 @@ static int ads1015_probe(struct i2c_client *client,
                dev_err(&client->dev, "iio triggered buffer setup failed\n");
                return ret;
        }
+
        ret = pm_runtime_set_active(&client->dev);
        if (ret)
                goto err_buffer_cleanup;
@@ -687,6 +707,15 @@ static const struct dev_pm_ops ads1015_pm_ops = {
                           ads1015_runtime_resume, NULL)
 };
 
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id ads1015_acpi_match[] = {
+       {"ADS1015", ADS1015},
+       {"ADS1115", ADS1115},
+       {}
+};
+MODULE_DEVICE_TABLE(acpi, ads1015_acpi_match);
+#endif
+
 static const struct i2c_device_id ads1015_id[] = {
        {"ads1015", ADS1015},
        {"ads1115", ADS1115},
@@ -698,6 +727,9 @@ static struct i2c_driver ads1015_driver = {
        .driver = {
                .name = ADS1015_DRV_NAME,
                .pm = &ads1015_pm_ops,
+#ifdef CONFIG_ACPI
+               .acpi_match_table = ACPI_PTR(ads1015_acpi_match),
+#endif
        },
        .probe          = ads1015_probe,
        .remove         = ads1015_remove,
-- 
2.11.0

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