summaryrefslogtreecommitdiff
path: root/drivers/iio
diff options
context:
space:
mode:
authorLinus Walleij <linus.walleij@linaro.org>2019-12-12 00:38:17 +0300
committerJonathan Cameron <Jonathan.Cameron@huawei.com>2019-12-29 18:20:08 +0300
commitc35aae7443023c08d406c9077c9e842b48cdb22f (patch)
treeccd1f5f5d39b6080ad5ea3127fc4e5de100904c4 /drivers/iio
parent964172561ea65f92394ef823405c31f17c57cc90 (diff)
downloadlinux-c35aae7443023c08d406c9077c9e842b48cdb22f.tar.xz
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>
Diffstat (limited to 'drivers/iio')
-rw-r--r--drivers/iio/accel/bma180.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/iio/accel/bma180.c b/drivers/iio/accel/bma180.c
index 518efbe4eaf6..c2c15a4f9ee1 100644
--- a/drivers/iio/accel/bma180.c
+++ b/drivers/iio/accel/bma180.c
@@ -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 @@ err_trigger_free:
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;
}