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authorStephen Boyd <sboyd@codeaurora.org>2015-06-12 03:37:05 +0300
committerMark Brown <broonie@kernel.org>2015-06-12 15:16:57 +0300
commit57f66b78860968fc7eddc9ce25f8e57f7e5000bd (patch)
tree5ee90fa99fdd1277706faa3bef39522d26ebc4bc /include/linux/regulator
parent23c779b9f9161d6568d3b2fca06e70ad182c480c (diff)
downloadlinux-57f66b78860968fc7eddc9ce25f8e57f7e5000bd.tar.xz
regulator: Add soft start support
Some regulators support a "soft start" feature where the voltage ramps up slowly when the regulator is enabled. Add an op (set_soft_start) and a DT property + constraint to support this. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/linux/regulator')
-rw-r--r--include/linux/regulator/driver.h2
-rw-r--r--include/linux/regulator/machine.h1
2 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h
index 76144a337ff7..e0635d0894aa 100644
--- a/include/linux/regulator/driver.h
+++ b/include/linux/regulator/driver.h
@@ -161,6 +161,8 @@ struct regulator_ops {
unsigned int old_selector,
unsigned int new_selector);
+ int (*set_soft_start) (struct regulator_dev *);
+
/* report regulator status ... most other accessors report
* control inputs, this reports results of combining inputs
* from Linux (and other sources) with the actual load.
diff --git a/include/linux/regulator/machine.h b/include/linux/regulator/machine.h
index 8ffb0619a03c..7f7d0a3fe1e1 100644
--- a/include/linux/regulator/machine.h
+++ b/include/linux/regulator/machine.h
@@ -142,6 +142,7 @@ struct regulation_constraints {
unsigned boot_on:1; /* bootloader/firmware enabled regulator */
unsigned apply_uV:1; /* apply uV constraint if min == max */
unsigned ramp_disable:1; /* disable ramp delay */
+ unsigned soft_start:1; /* ramp voltage slowly */
unsigned pull_down:1; /* pull down resistor when regulator off */
};