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: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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@ -18,6 +18,7 @@
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#include <linux/of_device.h>
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#include <linux/of.h>
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#include <linux/bitops.h>
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#include <linux/regulator/consumer.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/iio/iio.h>
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@ -110,6 +111,8 @@ struct bma180_part_info {
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#define BMA250_INT_RESET_MASK BIT(7) /* Reset pending interrupts */
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struct bma180_data {
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struct regulator *vdd_supply;
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struct regulator *vddio_supply;
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struct i2c_client *client;
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struct iio_trigger *trig;
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const struct bma180_part_info *part_info;
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@ -736,6 +739,40 @@ static int bma180_probe(struct i2c_client *client,
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if (ret)
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return ret;
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data->vdd_supply = devm_regulator_get(dev, "vdd");
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if (IS_ERR(data->vdd_supply)) {
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if (PTR_ERR(data->vdd_supply) != -EPROBE_DEFER)
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dev_err(dev, "Failed to get vdd regulator %d\n",
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(int)PTR_ERR(data->vdd_supply));
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return PTR_ERR(data->vdd_supply);
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}
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data->vddio_supply = devm_regulator_get(dev, "vddio");
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if (IS_ERR(data->vddio_supply)) {
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if (PTR_ERR(data->vddio_supply) != -EPROBE_DEFER)
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dev_err(dev, "Failed to get vddio regulator %d\n",
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(int)PTR_ERR(data->vddio_supply));
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return PTR_ERR(data->vddio_supply);
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}
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/* Typical voltage 2.4V these are min and max */
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ret = regulator_set_voltage(data->vdd_supply, 1620000, 3600000);
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if (ret)
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return ret;
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ret = regulator_set_voltage(data->vddio_supply, 1200000, 3600000);
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if (ret)
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return ret;
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ret = regulator_enable(data->vdd_supply);
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if (ret) {
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dev_err(dev, "Failed to enable vdd regulator: %d\n", ret);
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return ret;
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}
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ret = regulator_enable(data->vddio_supply);
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if (ret) {
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dev_err(dev, "Failed to enable vddio regulator: %d\n", ret);
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goto err_disable_vdd;
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}
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/* Wait to make sure we started up properly (3 ms at least) */
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usleep_range(3000, 5000);
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ret = data->part_info->chip_config(data);
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if (ret < 0)
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goto err_chip_disable;
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@ -798,6 +835,9 @@ err_trigger_free:
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iio_trigger_free(data->trig);
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err_chip_disable:
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data->part_info->chip_disable(data);
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regulator_disable(data->vddio_supply);
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err_disable_vdd:
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regulator_disable(data->vdd_supply);
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return ret;
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}
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@ -817,6 +857,8 @@ static int bma180_remove(struct i2c_client *client)
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mutex_lock(&data->mutex);
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data->part_info->chip_disable(data);
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mutex_unlock(&data->mutex);
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regulator_disable(data->vddio_supply);
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regulator_disable(data->vdd_supply);
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return 0;
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}
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