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authorTuomas Tynkkynen <ttynkkynen@nvidia.com>2014-07-21 19:38:48 +0400
committerMark Brown <broonie@linaro.org>2014-07-25 21:43:48 +0400
commit04eca28cde52cdf9eb91e127cc358ad79a8ec53b (patch)
treecb4507f5e7f2430325312c86332fbe3ce887879b /include/linux/regulator/consumer.h
parent7171511eaec5bf23fb06078f59784a3a0626b38f (diff)
downloadlinux-04eca28cde52cdf9eb91e127cc358ad79a8ec53b.tar.xz
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>
Diffstat (limited to 'include/linux/regulator/consumer.h')
-rw-r--r--include/linux/regulator/consumer.h26
1 files changed, 26 insertions, 0 deletions
diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/consumer.h
index a2d9d81038d1..0b1c8d09a6b1 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_set_optimum_mode(struct regulator *regulator, int load_uA);
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 @@ static inline int regulator_allow_bypass(struct regulator *regulator,
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)
{