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Groups > linux.kernel > #1483481

[PATCH v5 3/6] regulator: core: Don't skip set_voltage_time when ramp delay disabled

From Matthias Kaehlcke <mka@chromium.org>
Newsgroups linux.kernel
Subject [PATCH v5 3/6] regulator: core: Don't skip set_voltage_time when ramp delay disabled
Date 2016-09-14 19:00 +0200
Message-ID <shlHs-3jX-13@gated-at.bofh.it> (permalink)
References <shlHs-3jX-7@gated-at.bofh.it>
Organization linux.* mail to news gateway

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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 <mka@chromium.org>
---
Changes in v5:
- This patch is new for v5.

 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 b0076cc..df3028b 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2804,9 +2804,7 @@ static int _regulator_do_set_voltage(struct regulator_dev *rdev,
 		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 *rdev,
 	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)
-- 
2.8.0.rc3.226.g39d4020

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Thread

[PATCH v5 1/6] regulator: core: Use local ops variable in _regulator_do_set_voltage() Matthias Kaehlcke <mka@chromium.org> - 2016-09-14 19:00 +0200
  [PATCH v5 3/6] regulator: core: Don't skip set_voltage_time when ramp delay disabled Matthias Kaehlcke <mka@chromium.org> - 2016-09-14 19:00 +0200
    Applied "regulator: core: Don't skip set_voltage_time when ramp delay disabled" to the regulator tree Mark Brown <broonie@kernel.org> - 2016-09-16 19:50 +0200
  [PATCH v5 4/6] regulator: core: Add set_voltage_time op Matthias Kaehlcke <mka@chromium.org> - 2016-09-14 19:00 +0200
    Applied "regulator: core: Add set_voltage_time op" to the regulator tree Mark Brown <broonie@kernel.org> - 2016-09-16 19:50 +0200
  [PATCH v5 6/6] regulator: core: Prevent falling too fast Matthias Kaehlcke <mka@chromium.org> - 2016-09-14 19:00 +0200
    Re: [PATCH v5 6/6] regulator: core: Prevent falling too fast kbuild test robot <lkp@intel.com> - 2016-09-14 23:40 +0200
  Applied "regulator: core: Use local ops variable in _regulator_do_set_voltage()" to the regulator tree Mark Brown <broonie@kernel.org> - 2016-09-14 19:20 +0200

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