The patch

   regulator: core: Don't skip set_voltage_time when ramp delay disabled

has been applied to the regulator tree at


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>From d89564efe79419a093e966a959bf5ba2c94e693f Mon Sep 17 00:00:00 2001
From: Matthias Kaehlcke <>
Date: Wed, 14 Sep 2016 09:52:07 -0700
Subject: [PATCH] regulator: core: Don't skip set_voltage_time when ramp delay

The current code assumes that only the ramp_delay is used to determine
the time needed for the voltage to stabilize. This may be true for the
calculation done by regulator_set_voltage_time_sel(), however regulators
can implement their own set_voltage_time_sel() op which would be skipped
if no ramp delay is specified. Remove the check in
_regulator_do_set_voltage(), the functions calculating the ramp delay
return 0 anyway when the ramp delay is not configured.

Signed-off-by: Matthias Kaehlcke <>
Signed-off-by: Mark Brown <>
 drivers/regulator/core.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index b0076ccf896b..df3028b2a8e9 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2804,9 +2804,7 @@ static int _regulator_do_set_voltage(struct regulator_dev 
                goto out;
        /* Call set_voltage_time_sel if successfully obtained old_selector */
-       if (!rdev->constraints->ramp_disable && old_selector >= 0
-               && old_selector != selector) {
+       if (!old_selector >= 0 && old_selector != selector) {
                delay = ops->set_voltage_time_sel(rdev,
                                                old_selector, selector);
                if (delay < 0) {
@@ -3051,10 +3049,8 @@ int regulator_set_voltage_time_sel(struct regulator_dev 
        else if (rdev->desc->ramp_delay)
                ramp_delay = rdev->desc->ramp_delay;
-       if (ramp_delay == 0) {
-               rdev_warn(rdev, "ramp_delay not set\n");
+       if (ramp_delay == 0)
                return 0;
-       }
        /* sanity check */
        if (!rdev->desc->ops->list_voltage)

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