regulator: Add helpers for low-level register access
Add helper functions that allow regulator consumers to obtain low-level
details about the regulator hardware, like the voltage selector register
address and such. These details can be useful when configuring hardware
or firmware that want to do low-level access to regulators, with no
involvement from the kernel.
The use-case for Tegra is a voltage-controlled oscillator clocksource
which has control logic to change the supply voltage via I2C to achieve
a desired output clock rate.
Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/consumer.h
index a2d9d81..0b1c8d0 100644
--- a/include/linux/regulator/consumer.h
+++ b/include/linux/regulator/consumer.h
@@ -37,6 +37,7 @@
struct device;
struct notifier_block;
+struct regmap;
/*
* Regulator operating modes.
@@ -215,6 +216,13 @@
int regulator_allow_bypass(struct regulator *regulator, bool allow);
+struct regmap *regulator_get_regmap(struct regulator *regulator);
+int regulator_get_hardware_vsel_register(struct regulator *regulator,
+ unsigned *vsel_reg,
+ unsigned *vsel_mask);
+int regulator_list_hardware_vsel(struct regulator *regulator,
+ unsigned selector);
+
/* regulator notifier block */
int regulator_register_notifier(struct regulator *regulator,
struct notifier_block *nb);
@@ -452,6 +460,24 @@
return 0;
}
+struct regmap *regulator_get_regmap(struct regulator *regulator)
+{
+ return ERR_PTR(-EOPNOTSUPP);
+}
+
+int regulator_get_hardware_vsel_register(struct regulator *regulator,
+ unsigned *vsel_reg,
+ unsigned *vsel_mask)
+{
+ return -EOPNOTSUPP;
+}
+
+int regulator_list_hardware_vsel(struct regulator *regulator,
+ unsigned selector)
+{
+ return -EOPNOTSUPP;
+}
+
static inline int regulator_register_notifier(struct regulator *regulator,
struct notifier_block *nb)
{