Commit c35aae74 authored by Linus Walleij's avatar Linus Walleij Committed by Jonathan Cameron
Browse files

iio: accel: bma180: Basic regulator support 



This brings up the VDD and VDDIO regulators using the
regulator framework. Platforms that do not use regulators
will provide stubs or dummy regulators.

Cc: Peter Meerwald <pmeerw@pmeerw.net>
Cc: Oleksandr Kravchenko <o.v.kravchenko@globallogic.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 96417256

drivers/iio/accel/bma180.c

+42 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 
#include <linux/of_device.h>

#include <linux/of.h>

#include <linux/bitops.h>

#include <linux/regulator/consumer.h>

#include <linux/slab.h>

#include <linux/string.h>

#include <linux/iio/iio.h>
@@ -110,6 +111,8 @@ struct bma180_part_info { 
#define BMA250_INT_RESET_MASK	BIT(7) /* Reset pending interrupts */



struct bma180_data {

	struct regulator *vdd_supply;

	struct regulator *vddio_supply;

	struct i2c_client *client;

	struct iio_trigger *trig;

	const struct bma180_part_info *part_info;
@@ -736,6 +739,40 @@ static int bma180_probe(struct i2c_client *client, 
	if (ret)

		return ret;



	data->vdd_supply = devm_regulator_get(dev, "vdd");

	if (IS_ERR(data->vdd_supply)) {

		if (PTR_ERR(data->vdd_supply) != -EPROBE_DEFER)

			dev_err(dev, "Failed to get vdd regulator %d\n",

				(int)PTR_ERR(data->vdd_supply));

		return PTR_ERR(data->vdd_supply);

	}

	data->vddio_supply = devm_regulator_get(dev, "vddio");

	if (IS_ERR(data->vddio_supply)) {

		if (PTR_ERR(data->vddio_supply) != -EPROBE_DEFER)

			dev_err(dev, "Failed to get vddio regulator %d\n",

				(int)PTR_ERR(data->vddio_supply));

		return PTR_ERR(data->vddio_supply);

	}

	/* Typical voltage 2.4V these are min and max */

	ret = regulator_set_voltage(data->vdd_supply, 1620000, 3600000);

	if (ret)

		return ret;

	ret = regulator_set_voltage(data->vddio_supply, 1200000, 3600000);

	if (ret)

		return ret;

	ret = regulator_enable(data->vdd_supply);

	if (ret) {

		dev_err(dev, "Failed to enable vdd regulator: %d\n", ret);

		return ret;

	}

	ret = regulator_enable(data->vddio_supply);

	if (ret) {

		dev_err(dev, "Failed to enable vddio regulator: %d\n", ret);

		goto err_disable_vdd;

	}

	/* Wait to make sure we started up properly (3 ms at least) */

	usleep_range(3000, 5000);



	ret = data->part_info->chip_config(data);

	if (ret < 0)

		goto err_chip_disable;
@@ -798,6 +835,9 @@ static int bma180_probe(struct i2c_client *client, 
	iio_trigger_free(data->trig);

err_chip_disable:

	data->part_info->chip_disable(data);

	regulator_disable(data->vddio_supply);

err_disable_vdd:

	regulator_disable(data->vdd_supply);



	return ret;

}
@@ -817,6 +857,8 @@ static int bma180_remove(struct i2c_client *client) 
	mutex_lock(&data->mutex);

	data->part_info->chip_disable(data);

	mutex_unlock(&data->mutex);

	regulator_disable(data->vddio_supply);

	regulator_disable(data->vdd_supply);



	return 0;

}