From: Devajith V S <[email protected]> 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 <[email protected]> --- 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
