linux-kernel - [PATCH RFC v4 03/13] regulator: da9063: implement get_active

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Message-Id: <20230419-dynamic-vmon-v4-3-4d3734e62ada@skidata.com>
Date:   Tue, 20 Jun 2023 22:02:56 +0200
From:   Benjamin Bara <bbara93@...il.com>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>
Cc:     support.opensource@...semi.com,
        DLG-Adam.Ward.opensource@...renesas.com,
        Martin Fuzzey <martin.fuzzey@...wbird.group>,
        linux-kernel@...r.kernel.org,
        Matti Vaittinen <mazziesaccount@...il.com>,
        Benjamin Bara <benjamin.bara@...data.com>
Subject: [PATCH RFC v4 03/13] regulator: da9063: implement
 get_active_protections()

From: Benjamin Bara <benjamin.bara@...data.com>

Implement the new get_active_protections() op. This helps to find out if
a monitor is enabled and the DT is unaware of it. This could result to
an invalid state, as the !PWR_OK state might be triggered if the
regulator is turned off while the monitor stays active.

Signed-off-by: Benjamin Bara <benjamin.bara@...data.com>
---
 drivers/regulator/da9063-regulator.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/regulator/da9063-regulator.c b/drivers/regulator/da9063-regulator.c
index 308ad63fcf78..071b368f154f 100644
--- a/drivers/regulator/da9063-regulator.c
+++ b/drivers/regulator/da9063-regulator.c
@@ -207,6 +207,24 @@ static const unsigned int da9063_bmem_bio_merged_limits[] = {
 	4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
 };
 
+static int da9063_get_xvp(struct regulator_dev *rdev, unsigned int *state)
+{
+	struct da9063_regulator *regl = rdev_get_drvdata(rdev);
+	unsigned int val;
+	int ret;
+
+	ret = regmap_field_read(regl->vmon, &val);
+	if (ret)
+		return ret;
+
+	*state = REGULATOR_MONITOR_NONE;
+	if (val)
+		*state = REGULATOR_MONITOR_OVER_VOLTAGE |
+			 REGULATOR_MONITOR_UNDER_VOLTAGE;
+
+	return 0;
+}
+
 static int da9063_set_xvp(struct regulator_dev *rdev, int lim_uV, int severity, bool enable)
 {
 	struct da9063_regulator *regl = rdev_get_drvdata(rdev);
@@ -580,6 +598,7 @@ static const struct regulator_ops da9063_buck_ops = {
 	.set_suspend_mode		= da9063_buck_set_suspend_mode,
 	.set_over_voltage_protection	= da9063_set_xvp,
 	.set_under_voltage_protection	= da9063_set_xvp,
+	.get_active_protections		= da9063_get_xvp,
 };
 
 static const struct regulator_ops da9063_ldo_ops = {
@@ -598,6 +617,7 @@ static const struct regulator_ops da9063_ldo_ops = {
 	.set_suspend_mode		= da9063_ldo_set_suspend_mode,
 	.set_over_voltage_protection	= da9063_set_xvp,
 	.set_under_voltage_protection	= da9063_set_xvp,
+	.get_active_protections		= da9063_get_xvp,
 };
 
 /* Info of regulators for DA9063 */

-- 
2.34.1