linux-kernel - [PATCH RESEND v2 5/7] regulator: mt6358: Add output voltage fine tuning to fixed regulators

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Message-ID: <20230721082903.2038975-6-wenst@chromium.org>
Date:   Fri, 21 Jul 2023 16:28:57 +0800
From:   Chen-Yu Tsai <wenst@...omium.org>
To:     Lee Jones <lee@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     Chen-Yu Tsai <wenst@...omium.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH RESEND v2 5/7] regulator: mt6358: Add output voltage fine tuning to fixed regulators

The "fixed" LDO regulators found on the MT6358 and MT6366 PMICs have
either no voltage selection register, or only one valid setting.
However these do have a fine voltage calibration setting that can
slightly boost the output voltage from 0 mV to 100 mV, in 10 mV
increments.

Add support for this by changing these into linear range regulators.

Signed-off-by: Chen-Yu Tsai <wenst@...omium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
 drivers/regulator/mt6358-regulator.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/regulator/mt6358-regulator.c b/drivers/regulator/mt6358-regulator.c
index a1eae45f5fee..b34ad85db771 100644
--- a/drivers/regulator/mt6358-regulator.c
+++ b/drivers/regulator/mt6358-regulator.c
@@ -123,10 +123,13 @@ struct mt6358_regulator_info {
 		.type = REGULATOR_VOLTAGE,	\
 		.id = MT6358_ID_##vreg,	\
 		.owner = THIS_MODULE,	\
-		.n_voltages = 1,	\
+		.n_voltages = 11,	\
+		.vsel_reg = MT6358_##vreg##_ANA_CON0,	\
+		.vsel_mask = GENMASK(3, 0),	\
 		.enable_reg = enreg,	\
 		.enable_mask = BIT(enbit),	\
 		.min_uV = volt,	\
+		.uV_step = 10000, \
 	},	\
 	.status_reg = MT6358_LDO_##vreg##_CON1,	\
 	.qi = BIT(15),							\
@@ -219,10 +222,13 @@ struct mt6358_regulator_info {
 		.type = REGULATOR_VOLTAGE,	\
 		.id = MT6366_ID_##vreg,	\
 		.owner = THIS_MODULE,	\
-		.n_voltages = 1,	\
+		.n_voltages = 11,	\
+		.vsel_reg = MT6358_##vreg##_ANA_CON0,	\
+		.vsel_mask = GENMASK(3, 0),	\
 		.enable_reg = enreg,	\
 		.enable_mask = BIT(enbit),	\
 		.min_uV = volt,	\
+		.uV_step = 10000, \
 	},	\
 	.status_reg = MT6358_LDO_##vreg##_CON1,	\
 	.qi = BIT(15),							\
@@ -476,8 +482,13 @@ static const struct regulator_ops mt6358_volt_table_ops = {
 	.get_status = mt6358_get_status,
 };
 
+/* "Fixed" LDOs with output voltage calibration +0 ~ +10 mV */
 static const struct regulator_ops mt6358_volt_fixed_ops = {
 	.list_voltage = regulator_list_voltage_linear,
+	.map_voltage = regulator_map_voltage_linear,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+	.get_voltage_sel = mt6358_get_buck_voltage_sel,
+	.set_voltage_time_sel = regulator_set_voltage_time_sel,
 	.enable = regulator_enable_regmap,
 	.disable = regulator_disable_regmap,
 	.is_enabled = regulator_is_enabled_regmap,
-- 
2.41.0.487.g6d72f3e995-goog