From: Devajith V S <devajithvs@xxxxxxxxx>
kxcjk1013 devices have VDD and VDDIO power lines. Need
to make sure the regulators are enabled before any
communication with kxcjk1013. This patch introduces
vdd/vddio regulators for kxcjk1013.
Signed-off-by: Devajith V S <devajithvs@xxxxxxxxx>
---
drivers/iio/accel/kxcjk-1013.c | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/drivers/iio/accel/kxcjk-1013.c b/drivers/iio/accel/kxcjk-1013.c
index e92c7e676..67d3d8270 100644
--- a/drivers/iio/accel/kxcjk-1013.c
+++ b/drivers/iio/accel/kxcjk-1013.c
@@ -14,6 +14,7 @@
#include <linux/acpi.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/buffer.h>
@@ -133,6 +134,7 @@ enum kx_acpi_type {
};
struct kxcjk1013_data {
+ struct regulator_bulk_data regulators[2];
struct i2c_client *client;
struct iio_trigger *dready_trig;
struct iio_trigger *motion_trig;
@@ -1300,6 +1302,13 @@ static const char *kxcjk1013_match_acpi_device(struct device *dev,
return dev_name(dev);
}
+static void kxcjk1013_disable_regulators(void *d)
+{
+ struct kxcjk1013_data *data = d;
+
+ regulator_bulk_disable(ARRAY_SIZE(data->regulators), data->regulators);
+}
+
static int kxcjk1013_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -1330,6 +1339,28 @@ static int kxcjk1013_probe(struct i2c_client *client,
return ret;
}
+ data->regulators[0].supply = "vdd";
+ data->regulators[1].supply = "vddio";
+ ret = devm_regulator_bulk_get(&client->dev, ARRAY_SIZE(data->regulators),
+ data->regulators);
+ if (ret)
+ return dev_err_probe(&client->dev, ret, "Failed to get regulators\n");
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(data->regulators),
+ data->regulators);
+ if (ret)
+ return ret;
+
+ ret = devm_add_action_or_reset(&client->dev, kxcjk1013_disable_regulators, data);
+ if (ret)
+ return ret;
+
+ /*
+ * A typical delay of 10ms is required for powering up
+ * according to the data sheets of supported chips.
+ */
+ msleep(20);
+
if (id) {
data->chipset = (enum kx_chipset)(id->driver_data);
name = id->name;
--
2.17.1
