linux-kernel - [PATCH v3 09/12] regulator: mt6358: Make MT6366 vcn18 LDO configurable

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Message-ID: <20230919104357.3971512-10-wenst@chromium.org>
Date:   Tue, 19 Sep 2023 18:43:52 +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>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Mark Brown <broonie@...nel.org>
Cc:     Chen-Yu Tsai <wenst@...omium.org>,
        Zhiyong Tao <zhiyong.tao@...iatek.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: [PATCH v3 09/12] regulator: mt6358: Make MT6366 vcn18 LDO configurable

The VCN18 regulator on the MT6366 (only) actually has a wide
configurable range of voltages, even though its name suggests a fixed
output voltage.

Convert it from a fixed LDO to a configurable LDO. Its range of settings
is the same as the VM18 regulator, which is missing and will be added in
a subsequent patch.

Signed-off-by: Chen-Yu Tsai <wenst@...omium.org>
---
Changes since v2:
- Linear range selector values fixed

Angelo's reviewed-by was dropped.

 drivers/regulator/mt6358-regulator.c | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/drivers/regulator/mt6358-regulator.c b/drivers/regulator/mt6358-regulator.c
index 7122ad43be6e..fdd4710d57d8 100644
--- a/drivers/regulator/mt6358-regulator.c
+++ b/drivers/regulator/mt6358-regulator.c
@@ -325,6 +325,27 @@ static const struct linear_range vldo28_ranges[] = {
 	REGULATOR_LINEAR_RANGE(3000000, 0, 10, 10000),
 };
 
+static const unsigned int mt6366_vcn18_vm18_selectors[] = {
+	0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };
+static const struct linear_range mt6366_vcn18_vm18_ranges[] = {
+	REGULATOR_LINEAR_RANGE(600000, 0, 10, 10000),
+	REGULATOR_LINEAR_RANGE(700000, 0, 10, 10000),
+	REGULATOR_LINEAR_RANGE(800000, 0, 10, 10000),
+	REGULATOR_LINEAR_RANGE(900000, 0, 10, 10000),
+	REGULATOR_LINEAR_RANGE(1000000, 0, 10, 10000),
+	REGULATOR_LINEAR_RANGE(1100000, 0, 10, 10000),
+	REGULATOR_LINEAR_RANGE(1200000, 0, 10, 10000),
+	REGULATOR_LINEAR_RANGE(1300000, 0, 10, 10000),
+	REGULATOR_LINEAR_RANGE(1400000, 0, 10, 10000),
+	REGULATOR_LINEAR_RANGE(1500000, 0, 10, 10000),
+	REGULATOR_LINEAR_RANGE(1600000, 0, 10, 10000),
+	REGULATOR_LINEAR_RANGE(1700000, 0, 10, 10000),
+	REGULATOR_LINEAR_RANGE(1800000, 0, 10, 10000),
+	REGULATOR_LINEAR_RANGE(1900000, 0, 10, 10000),
+	REGULATOR_LINEAR_RANGE(2000000, 0, 10, 10000),
+	REGULATOR_LINEAR_RANGE(2100000, 0, 10, 10000),
+};
+
 static unsigned int mt6358_map_mode(unsigned int mode)
 {
 	return mode == MT6397_BUCK_MODE_AUTO ?
@@ -553,7 +574,6 @@ static const struct mt6358_regulator_info mt6366_regulators[] = {
 			 MT6358_LDO_VRF12_CON0, 0, 1200000),
 	MT6366_REG_FIXED("vio18", VIO18,
 			 MT6358_LDO_VIO18_CON0, 0, 1800000),
-	MT6366_REG_FIXED("vcn18", VCN18, MT6358_LDO_VCN18_CON0, 0, 1800000),
 	MT6366_REG_FIXED("vfe28", VFE28, MT6358_LDO_VFE28_CON0, 0, 2800000),
 	MT6366_REG_FIXED("vcn28", VCN28, MT6358_LDO_VCN28_CON0, 0, 2800000),
 	MT6366_REG_FIXED("vxo22", VXO22, MT6358_LDO_VXO22_CON0, 0, 2200000),
@@ -586,6 +606,8 @@ static const struct mt6358_regulator_info mt6366_regulators[] = {
 		   MT6358_LDO_VMC_CON0, 0, MT6358_VMC_ANA_CON0, 0xf00),
 	MT6366_LDO("vsim2", VSIM2, vsim,
 		   MT6358_LDO_VSIM2_CON0, 0, MT6358_VSIM2_ANA_CON0, 0xf00),
+	MT6366_LDO("vcn18", VCN18, mt6366_vcn18_vm18,
+		   MT6358_LDO_VCN18_CON0, 0, MT6358_VCN18_ANA_CON0, 0xf00),
 	MT6366_LDO1("vsram-proc11", VSRAM_PROC11, 500000, 1293750, 6250,
 		    MT6358_LDO_VSRAM_PROC11_DBG0, 0x7f00, MT6358_LDO_VSRAM_CON0, 0x7f),
 	MT6366_LDO1("vsram-others", VSRAM_OTHERS, 500000, 1293750, 6250,
-- 
2.42.0.459.ge4e396fd5e-goog