From: Mark Brown <broonie@kernel.org>
Date: Tue, 29 Mar 2016 23:33:42 +0000 (-0700)
Subject: UPSTREAM: regulator: core: Log when we bring constraints into range
X-Git-Tag: firefly_0821_release~471
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=c90bbfc477f92ea9df2925fbef6f3f47bc71b554;p=firefly-linux-kernel-4.4.55.git

UPSTREAM: regulator: core: Log when we bring constraints into range

This aids in debugging problems triggered by the regulator core applying
its constraints, we could potentially crash immediately after updating
the voltage if the constraints are buggy.

Signed-off-by: Mark Brown <broonie@kernel.org>
(cherry picked from commit 45a91e8f767afbbffff46bf7251f81d15d121136)

Change-Id: I8c3e4a856f05c13e6ce3db8a6d46686557109962
Signed-off-by: David Wu <david.wu@rock-chips.com>
---

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 59778a4801c0..0d57cd6c3f24 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -933,6 +933,8 @@ static int machine_constraints_voltage(struct regulator_dev *rdev,
 		}
 
 		if (target_min != current_uV || target_max != current_uV) {
+			rdev_info(rdev, "Bringing %duV into %d-%duV\n",
+				  current_uV, target_min, target_max);
 			ret = _regulator_do_set_voltage(
 				rdev, target_min, target_max);
 			if (ret < 0) {