[RFC,v3,12/15] regulator: bd71828: Support in-kernel APIs to change run-level
diff mbox series

Message ID ba8e6186501e2a3b1ab6441bacdbe05d0aab0778.1572606437.git.matti.vaittinen@fi.rohmeurope.com
State New
Headers show
Series
  • Support ROHM BD71828 PMIC
Related show

Commit Message

Vaittinen, Matti Nov. 1, 2019, 11:45 a.m. UTC
Add exported functions bd71828_set_runlevel and
bd71828_get_runlevel for setting and getting the system run
level.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
---

Changes from v2 - no changes

 drivers/regulator/bd71828-regulator.c | 67 +++++++++++++++++++++++++++
 include/linux/mfd/rohm-bd71828.h      |  2 +
 2 files changed, 69 insertions(+)

Patch
diff mbox series

diff --git a/drivers/regulator/bd71828-regulator.c b/drivers/regulator/bd71828-regulator.c
index d9e1381b5964..eaff9b1b20f9 100644
--- a/drivers/regulator/bd71828-regulator.c
+++ b/drivers/regulator/bd71828-regulator.c
@@ -505,6 +505,73 @@  int bd71828_set_runlevel_voltage(struct regulator *regulator, unsigned int uv,
 }
 EXPORT_SYMBOL(bd71828_set_runlevel_voltage);
 
+/**
+ * bd71828_set_runlevel - change system run-level.
+ *
+ * @regulator:	pointer to one of the BD71828 regulators obtained by
+ *		call to regulator_get
+ * @level:	New run-level the system should enter
+ *
+ * Changes the system to run-level which was given as argument. This
+ * operation will change state of all regulators which are set to be
+ * controlled by run-levels. Note that 'regulator' must point to a
+ * regulator which is controlled by run-levels.
+ */
+int bd71828_set_runlevel(struct regulator *regulator, unsigned int level)
+{
+	struct regulator_dev *rdev = regulator->rdev;
+	struct bd71828_regulator_data *rd = rdev_get_drvdata(rdev);
+
+	if (!rd)
+		return -ENOENT;
+
+	if (!rd || !rd->allow_runlvl)
+		return -EINVAL;
+
+	if (rd->gps)
+		return bd71828_dvs_gpio_set_run_level(rd, level);
+
+	return bd71828_dvs_i2c_set_run_level(rd->regmap, level);
+}
+EXPORT_SYMBOL(bd71828_set_runlevel);
+
+/**
+ * bd71828_get_runlevel - get the current system run-level.
+ *
+ * @regulator:	pointer to one of the BD71828 regulators obtained by
+ *		call to regulator_get
+ * @level:	Pointer to value where current run-level is stored
+ *
+ * Returns the current system run-level. Note that 'regulator' must
+ * point to a regulator which is controlled by run-levels.
+ */
+int bd71828_get_runlevel(struct regulator *regulator, unsigned int *level)
+{
+	struct regulator_dev *rdev = regulator->rdev;
+	struct bd71828_regulator_data *rd = rdev_get_drvdata(rdev);
+	int ret;
+
+	if (!rd)
+		return -ENOENT;
+
+	if (!rd || !rd->allow_runlvl)
+		return -EINVAL;
+
+	if (!rd->gps)
+		ret = bd71828_dvs_i2c_get_run_level(rd->regmap, rd);
+	else
+		ret = bd71828_dvs_gpio_get_run_level(rd);
+
+	if (ret < 0)
+		return ret;
+
+	*level = (unsigned int) ret;
+
+	return 0;
+}
+EXPORT_SYMBOL(bd71828_get_runlevel);
+
+
 static const struct regulator_ops dvs_buck_gpio_ops = {
 	.is_enabled = bd71828_dvs_gpio_is_enabled,
 	.get_voltage = bd71828_dvs_gpio_get_voltage,
diff --git a/include/linux/mfd/rohm-bd71828.h b/include/linux/mfd/rohm-bd71828.h
index d2bb78427466..fc0955f0662c 100644
--- a/include/linux/mfd/rohm-bd71828.h
+++ b/include/linux/mfd/rohm-bd71828.h
@@ -420,5 +420,7 @@  enum {
 
 int bd71828_set_runlevel_voltage(struct regulator *regulator, unsigned int uv,
 				 unsigned int level);
+int bd71828_set_runlevel(struct regulator *regulator, unsigned int level);
+int bd71828_get_runlevel(struct regulator *regulator, unsigned int *level);
 
 #endif /* __LINUX_MFD_BD71828_H__ */