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From:   Benjamin Bara <bbara93@gmail.com>
Date:   Tue, 20 Jun 2023 22:02:57 +0200
Subject: [PATCH RFC v4 04/13] regulator: bd718x7: implement
 get_active_protections()
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Message-Id: <20230419-dynamic-vmon-v4-4-4d3734e62ada@skidata.com>
References: <20230419-dynamic-vmon-v4-0-4d3734e62ada@skidata.com>
In-Reply-To: <20230419-dynamic-vmon-v4-0-4d3734e62ada@skidata.com>
To:     Liam Girdwood <lgirdwood@gmail.com>,
        Mark Brown <broonie@kernel.org>
Cc:     support.opensource@diasemi.com,
        DLG-Adam.Ward.opensource@dm.renesas.com,
        Martin Fuzzey <martin.fuzzey@flowbird.group>,
        linux-kernel@vger.kernel.org,
        Matti Vaittinen <mazziesaccount@gmail.com>,
        Benjamin Bara <benjamin.bara@skidata.com>
Precedence: bulk

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

This is required as the mon_disable_reg_set_higher workaround property
requires the ops to find out if it the monitor is set without the
device-tree being aware of it.

Signed-off-by: Benjamin Bara <benjamin.bara@skidata.com>
---
 drivers/regulator/bd718x7-regulator.c | 74 ++++++++++++++++++++++++++++-------
 1 file changed, 60 insertions(+), 14 deletions(-)

diff --git a/drivers/regulator/bd718x7-regulator.c b/drivers/regulator/bd718x7-regulator.c
index b0b9938c20a1..fbf609d219fc 100644
--- a/drivers/regulator/bd718x7-regulator.c
+++ b/drivers/regulator/bd718x7-regulator.c
@@ -56,7 +56,7 @@
 
 #define BD718XX_OPS(name, _list_voltage, _map_voltage, _set_voltage_sel, \
 		   _get_voltage_sel, _set_voltage_time_sel, _set_ramp_delay, \
-		   _set_uvp, _set_ovp)				\
+		   _set_uvp, _set_ovp, _get_prot)		\
 static const struct regulator_ops name = {			\
 	.enable = regulator_enable_regmap,			\
 	.disable = regulator_disable_regmap,			\
@@ -69,6 +69,7 @@ static const struct regulator_ops name = {			\
 	.set_ramp_delay = (_set_ramp_delay),			\
 	.set_under_voltage_protection = (_set_uvp),		\
 	.set_over_voltage_protection = (_set_ovp),		\
+	.get_active_protections = (_get_prot),			\
 };								\
 								\
 static const struct regulator_ops BD718XX_HWOPNAME(name) = {	\
@@ -81,6 +82,7 @@ static const struct regulator_ops BD718XX_HWOPNAME(name) = {	\
 	.set_ramp_delay = (_set_ramp_delay),			\
 	.set_under_voltage_protection = (_set_uvp),		\
 	.set_over_voltage_protection = (_set_ovp),		\
+	.get_active_protections = (_get_prot),			\
 }								\
 
 /*
@@ -457,6 +459,23 @@ static int bd718x7_xvp_sanity_check(struct regulator_dev *rdev, int lim_uV,
 	return 0;
 }
 
+static int bd717x7_get_ldo_prot(struct regulator_dev *rdev, unsigned int *state)
+{
+	int ldo_offset = rdev->desc->id - BD718XX_LDO1;
+	int prot_bit = BD718XX_LDO1_VRMON80 << ldo_offset;
+	int ret;
+
+	ret = regmap_test_bits(rdev->regmap, BD718XX_REG_MVRFLTMASK2, prot_bit);
+	if (ret < 0)
+		return ret;
+
+	*state = REGULATOR_MONITOR_NONE;
+	if (ret)
+		*state = REGULATOR_MONITOR_UNDER_VOLTAGE;
+
+	return 0;
+}
+
 static int bd718x7_set_ldo_uvp(struct regulator_dev *rdev, int lim_uV,
 			       int severity, bool enable)
 {
@@ -519,6 +538,33 @@ static int bd718x7_get_buck_uvp_info(int id, int *reg, int *bit)
 	return 0;
 }
 
+static int bd717x7_get_buck_prot(struct regulator_dev *rdev, unsigned int *state)
+{
+	int ret, reg, bit;
+
+	ret = bd718x7_get_buck_uvp_info(rdev->desc->id, &reg, &bit);
+	if (ret)
+		return ret;
+	ret = regmap_test_bits(rdev->regmap, reg, bit);
+	if (ret < 0)
+		return ret;
+
+	*state = REGULATOR_MONITOR_NONE;
+	if (ret)
+		*state = REGULATOR_MONITOR_UNDER_VOLTAGE;
+
+	ret = bd718x7_get_buck_ovp_info(rdev->desc->id, &reg, &bit);
+	if (ret)
+		return ret;
+	ret = regmap_test_bits(rdev->regmap, reg, bit);
+	if (ret < 0)
+		return ret;
+	if (ret)
+		*state |= REGULATOR_MONITOR_OVER_VOLTAGE;
+
+	return 0;
+}
+
 static int bd718x7_set_buck_uvp(struct regulator_dev *rdev, int lim_uV,
 				int severity, bool enable)
 {
@@ -566,7 +612,7 @@ BD718XX_OPS(bd718xx_pickable_range_ldo_ops,
 	    regulator_list_voltage_pickable_linear_range, NULL,
 	    bd718xx_set_voltage_sel_pickable_restricted,
 	    regulator_get_voltage_sel_pickable_regmap, NULL, NULL,
-	    bd718x7_set_ldo_uvp, NULL);
+	    bd718x7_set_ldo_uvp, NULL, bd717x7_get_ldo_prot);
 
 /* BD71847 and BD71850 LDO 5 is by default OFF at RUN state */
 static const struct regulator_ops bd718xx_ldo5_ops_hwstate = {
@@ -582,27 +628,27 @@ BD718XX_OPS(bd718xx_pickable_range_buck_ops,
 	    regulator_set_voltage_sel_pickable_regmap,
 	    regulator_get_voltage_sel_pickable_regmap,
 	    regulator_set_voltage_time_sel, NULL, bd718x7_set_buck_uvp,
-	    bd718x7_set_buck_ovp);
+	    bd718x7_set_buck_ovp, bd717x7_get_buck_prot);
 
 BD718XX_OPS(bd718xx_ldo_regulator_ops, regulator_list_voltage_linear_range,
 	    NULL, bd718xx_set_voltage_sel_restricted,
 	    regulator_get_voltage_sel_regmap, NULL, NULL, bd718x7_set_ldo_uvp,
-	    NULL);
+	    NULL, bd717x7_get_ldo_prot);
 
 BD718XX_OPS(bd718xx_ldo_regulator_nolinear_ops, regulator_list_voltage_table,
 	    NULL, bd718xx_set_voltage_sel_restricted,
 	    regulator_get_voltage_sel_regmap, NULL, NULL, bd718x7_set_ldo_uvp,
-	    NULL);
+	    NULL, bd717x7_get_ldo_prot);
 
 BD718XX_OPS(bd718xx_buck_regulator_ops, regulator_list_voltage_linear_range,
 	    NULL, regulator_set_voltage_sel_regmap,
 	    regulator_get_voltage_sel_regmap, regulator_set_voltage_time_sel,
-	    NULL, bd718x7_set_buck_uvp, bd718x7_set_buck_ovp);
+	    NULL, bd718x7_set_buck_uvp, bd718x7_set_buck_ovp, bd717x7_get_buck_prot);
 
 BD718XX_OPS(bd718xx_buck_regulator_nolinear_ops, regulator_list_voltage_table,
 	    regulator_map_voltage_ascend, regulator_set_voltage_sel_regmap,
 	    regulator_get_voltage_sel_regmap, regulator_set_voltage_time_sel,
-	    NULL, bd718x7_set_buck_uvp, bd718x7_set_buck_ovp);
+	    NULL, bd718x7_set_buck_uvp, bd718x7_set_buck_ovp, bd717x7_get_buck_prot);
 
 /*
  * OPS for BD71837
@@ -611,34 +657,34 @@ BD718XX_OPS(bd71837_pickable_range_ldo_ops,
 	    regulator_list_voltage_pickable_linear_range, NULL,
 	    bd71837_set_voltage_sel_pickable_restricted,
 	    regulator_get_voltage_sel_pickable_regmap, NULL, NULL,
-	    bd718x7_set_ldo_uvp, NULL);
+	    bd718x7_set_ldo_uvp, NULL, bd717x7_get_ldo_prot);
 
 BD718XX_OPS(bd71837_pickable_range_buck_ops,
 	    regulator_list_voltage_pickable_linear_range, NULL,
 	    bd71837_set_voltage_sel_pickable_restricted,
 	    regulator_get_voltage_sel_pickable_regmap,
 	    regulator_set_voltage_time_sel, NULL, bd718x7_set_buck_uvp,
-	    bd718x7_set_buck_ovp);
+	    bd718x7_set_buck_ovp, bd717x7_get_buck_prot);
 
 BD718XX_OPS(bd71837_ldo_regulator_ops, regulator_list_voltage_linear_range,
 	    NULL, rohm_regulator_set_voltage_sel_restricted,
 	    regulator_get_voltage_sel_regmap, NULL, NULL, bd718x7_set_ldo_uvp,
-	    NULL);
+	    NULL, bd717x7_get_ldo_prot);
 
 BD718XX_OPS(bd71837_ldo_regulator_nolinear_ops, regulator_list_voltage_table,
 	    NULL, rohm_regulator_set_voltage_sel_restricted,
 	    regulator_get_voltage_sel_regmap, NULL, NULL, bd718x7_set_ldo_uvp,
-	    NULL);
+	    NULL, bd717x7_get_ldo_prot);
 
 BD718XX_OPS(bd71837_buck_regulator_ops, regulator_list_voltage_linear_range,
 	    NULL, rohm_regulator_set_voltage_sel_restricted,
 	    regulator_get_voltage_sel_regmap, regulator_set_voltage_time_sel,
-	    NULL, bd718x7_set_buck_uvp, bd718x7_set_buck_ovp);
+	    NULL, bd718x7_set_buck_uvp, bd718x7_set_buck_ovp, bd717x7_get_buck_prot);
 
 BD718XX_OPS(bd71837_buck_regulator_nolinear_ops, regulator_list_voltage_table,
 	    regulator_map_voltage_ascend, rohm_regulator_set_voltage_sel_restricted,
 	    regulator_get_voltage_sel_regmap, regulator_set_voltage_time_sel,
-	    NULL, bd718x7_set_buck_uvp, bd718x7_set_buck_ovp);
+	    NULL, bd718x7_set_buck_uvp, bd718x7_set_buck_ovp, bd717x7_get_buck_prot);
 /*
  * BD71837 bucks 3 and 4 support defining their enable/disable state also
  * when buck enable state is under HW state machine control. In that case the
@@ -662,7 +708,7 @@ BD718XX_OPS(bd718xx_dvs_buck_regulator_ops, regulator_list_voltage_linear_range,
 	    NULL, regulator_set_voltage_sel_regmap,
 	    regulator_get_voltage_sel_regmap, regulator_set_voltage_time_sel,
 	    regulator_set_ramp_delay_regmap, bd718x7_set_buck_uvp,
-	    bd718x7_set_buck_ovp);
+	    bd718x7_set_buck_ovp, bd717x7_get_buck_prot);
 
 
 

-- 
2.34.1