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authorLinus Walleij <linus.walleij@linaro.org>2014-04-13 20:08:00 +0100
committerJonathan Cameron <jic23@kernel.org>2014-04-26 11:52:42 +0100
commitea7e586bdd331fd6fba2b6f9fd3777928c2814d8 (patch)
tree3d7caff67e139ab25a01ccfd2fa26edafb0cd261 /drivers/iio/common
parent4f544ced19b3d300ac11414b68a676a2c42f6d06 (diff)
iio: st_sensors: move regulator retrieveal to coreiio-for-3.16a
Currently the pressure sensor has code to retrieve and enable two regulators for Vdd and Vdd IO, but actually these voltage inputs are found on all of these ST sensors, so move the regulator handling to the core and make sure all the ST sensors call these functions on probe() and remove() to enable/disable power. Here also mover over to obtaining the regulator from the *parent* device of the IIO device, as the IIO device is created on-the-fly in this very subsystem it very unlikely evert have any regulators attached to it whatsoever. It is much more likely that the parent is a platform device, possibly instantiated from a device tree, which in turn have Vdd and Vdd IO supplied assigned to it. Cc: Lee Jones <lee.jones@linaro.org> Cc: Denis CIOCCA <denis.ciocca@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/common')
-rw-r--r--drivers/iio/common/st_sensors/st_sensors_core.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/iio/common/st_sensors/st_sensors_core.c b/drivers/iio/common/st_sensors/st_sensors_core.c
index 7ba1ef270213..e8b932fed70e 100644
--- a/drivers/iio/common/st_sensors/st_sensors_core.c
+++ b/drivers/iio/common/st_sensors/st_sensors_core.c
@@ -13,6 +13,7 @@
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/iio/iio.h>
+#include <linux/regulator/consumer.h>
#include <asm/unaligned.h>
#include <linux/iio/common/st_sensors.h>
@@ -198,6 +199,42 @@ int st_sensors_set_axis_enable(struct iio_dev *indio_dev, u8 axis_enable)
}
EXPORT_SYMBOL(st_sensors_set_axis_enable);
+void st_sensors_power_enable(struct iio_dev *indio_dev)
+{
+ struct st_sensor_data *pdata = iio_priv(indio_dev);
+ int err;
+
+ /* Regulators not mandatory, but if requested we should enable them. */
+ pdata->vdd = devm_regulator_get_optional(indio_dev->dev.parent, "vdd");
+ if (!IS_ERR(pdata->vdd)) {
+ err = regulator_enable(pdata->vdd);
+ if (err != 0)
+ dev_warn(&indio_dev->dev,
+ "Failed to enable specified Vdd supply\n");
+ }
+
+ pdata->vdd_io = devm_regulator_get_optional(indio_dev->dev.parent, "vddio");
+ if (!IS_ERR(pdata->vdd_io)) {
+ err = regulator_enable(pdata->vdd_io);
+ if (err != 0)
+ dev_warn(&indio_dev->dev,
+ "Failed to enable specified Vdd_IO supply\n");
+ }
+}
+EXPORT_SYMBOL(st_sensors_power_enable);
+
+void st_sensors_power_disable(struct iio_dev *indio_dev)
+{
+ struct st_sensor_data *pdata = iio_priv(indio_dev);
+
+ if (!IS_ERR(pdata->vdd))
+ regulator_disable(pdata->vdd);
+
+ if (!IS_ERR(pdata->vdd_io))
+ regulator_disable(pdata->vdd_io);
+}
+EXPORT_SYMBOL(st_sensors_power_disable);
+
static int st_sensors_set_drdy_int_pin(struct iio_dev *indio_dev,
struct st_sensors_platform_data *pdata)
{