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From:   Dmitry Osipenko <digetx@gmail.com>
To:     Thierry Reding <thierry.reding@gmail.com>,
        Jonathan Hunter <jonathanh@nvidia.com>,
        Mark Brown <broonie@kernel.org>,
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        Ulf Hansson <ulf.hansson@linaro.org>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
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        Peter Geis <pgwipeout@gmail.com>,
        Nicolas Chauvet <kwizart@gmail.com>,
        Krzysztof Kozlowski <krzk@kernel.org>,
        "Rafael J. Wysocki" <rjw@rjwysocki.net>,
        Kevin Hilman <khilman@kernel.org>,
        Peter De Schrijver <pdeschrijver@nvidia.com>,
        Viresh Kumar <vireshk@kernel.org>,
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        Michael Turquette <mturquette@baylibre.com>
Cc:     devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org,
        devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org,
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Subject: [PATCH v2 08/48] regulator: Make regulator_sync_voltage() usable by coupled regulators
Date:   Thu, 17 Dec 2020 21:05:58 +0300
Message-Id: <20201217180638.22748-9-digetx@gmail.com>
In-Reply-To: <20201217180638.22748-1-digetx@gmail.com>
References: <20201217180638.22748-1-digetx@gmail.com>
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Make regulator_sync_voltage() to re-balance voltage state of a coupled
regulators instead of changing the voltage directly.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
 drivers/regulator/core.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index ca03d8e70bd1..576efb815eb8 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -4131,6 +4131,12 @@ int regulator_sync_voltage(struct regulator *regulator)
 	if (ret < 0)
 		goto out;
 
+	/* balance only if there are regulators coupled */
+	if (rdev->coupling_desc.n_coupled > 1) {
+		ret = regulator_balance_voltage(rdev, PM_SUSPEND_ON);
+		goto out;
+	}
+
 	ret = _regulator_do_set_voltage(rdev, min_uV, max_uV);
 
 out:
-- 
2.29.2