diff options
| author | Devajith V S <devajithvs@gmail.com> | 2020-12-13 22:54:36 +0530 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2021-01-22 08:52:01 +0000 |
| commit | 1d2e91a2db664fa5c0b935fe45314759f6f1fdc5 (patch) | |
| tree | 61c8aa6fc8396a3c981e2f029b4027d52aea4889 /drivers/iio | |
| parent | da6336e2484a382b8d080fd9ede1114b5c98b7b0 (diff) | |
iio: accel: kxcjk1013: Add rudimentary regulator support
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@gmail.com>
Link: https://lore.kernel.org/r/20201213172437.2779-2-devajithvs@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/accel/kxcjk-1013.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/iio/accel/kxcjk-1013.c b/drivers/iio/accel/kxcjk-1013.c index e92c7e6766e1..2fadafc860fd 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 +1339,29 @@ 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. + * Hence double that to play safe. + */ + msleep(20); + if (id) { data->chipset = (enum kx_chipset)(id->driver_data); name = id->name; |