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Subject[PATCH v2 5/8] regulator: helpers: Add regmap set_pull_down helper
Date
Add a helper function regulator_set_pull_down_regmap to allow regmap
based regulators to easily enable pull down.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
---

Turns out I don't actually need this patch for the series, but since I
had gone to the effort of writing the code anyway, thought I might as
well keep it in. Will be useful if someone does want to use a pull down
on a regmap regulators and it is has been pretty well tested here.

Changes since v1:
- Added documentation for the new regulator_desc fields to the kernel doc.

drivers/regulator/helpers.c | 18 ++++++++++++++++++
include/linux/regulator/driver.h | 8 ++++++++
2 files changed, 26 insertions(+)

diff --git a/drivers/regulator/helpers.c b/drivers/regulator/helpers.c
index a75e7da..2ae7c3a 100644
--- a/drivers/regulator/helpers.c
+++ b/drivers/regulator/helpers.c
@@ -464,6 +464,24 @@ int regulator_set_soft_start_regmap(struct regulator_dev *rdev)
EXPORT_SYMBOL_GPL(regulator_set_soft_start_regmap);

/**
+ * regulator_set_pull_down_regmap - Default set_pull_down() using regmap
+ *
+ * @rdev: device to operate on.
+ */
+int regulator_set_pull_down_regmap(struct regulator_dev *rdev)
+{
+ unsigned int val;
+
+ val = rdev->desc->pull_down_val_on;
+ if (!val)
+ val = rdev->desc->pull_down_mask;
+
+ return regmap_update_bits(rdev->regmap, rdev->desc->pull_down_reg,
+ rdev->desc->pull_down_mask, val);
+}
+EXPORT_SYMBOL_GPL(regulator_set_pull_down_regmap);
+
+/**
* regulator_get_bypass_regmap - Default get_bypass() using regmap
*
* @rdev: device to operate on.
diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h
index 1054c03..8a9078d 100644
--- a/include/linux/regulator/driver.h
+++ b/include/linux/regulator/driver.h
@@ -296,6 +296,10 @@ enum regulator_type {
* @soft_start_mask: Mask for control when using regmap set_soft_start
* @soft_start_val_on: Enabling value for control when using regmap
* set_soft_start
+ * @pull_down_reg: Register for control when using regmap set_pull_down
+ * @pull_down_mask: Mask for control when using regmap set_pull_down
+ * @pull_down_val_on: Enabling value for control when using regmap
+ * set_pull_down
*
* @enable_time: Time taken for initial enable of regulator (in uS).
* @off_on_delay: guard time (in uS), before re-enabling a regulator
@@ -352,6 +356,9 @@ struct regulator_desc {
unsigned int soft_start_reg;
unsigned int soft_start_mask;
unsigned int soft_start_val_on;
+ unsigned int pull_down_reg;
+ unsigned int pull_down_mask;
+ unsigned int pull_down_val_on;

unsigned int enable_time;

@@ -484,6 +491,7 @@ int regulator_set_voltage_time_sel(struct regulator_dev *rdev,
int regulator_set_bypass_regmap(struct regulator_dev *rdev, bool enable);
int regulator_get_bypass_regmap(struct regulator_dev *rdev, bool *enable);
int regulator_set_soft_start_regmap(struct regulator_dev *rdev);
+int regulator_set_pull_down_regmap(struct regulator_dev *rdev);

int regulator_set_active_discharge_regmap(struct regulator_dev *rdev,
bool enable);
--
2.1.4
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