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From:   Chen-Yu Tsai <wenst@chromium.org>
To:     Lee Jones <lee@kernel.org>, Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley <conor+dt@kernel.org>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>,
        Mark Brown <broonie@kernel.org>
Cc:     Chen-Yu Tsai <wenst@chromium.org>,
        Zhiyong Tao <zhiyong.tao@mediatek.com>,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org
Subject: [PATCH 6/9] regulator: mt6358: Make MT6366 vcn18 LDO configurable
Date:   Thu,  3 Aug 2023 15:42:44 +0800
Message-ID: <20230803074249.3065586-7-wenst@chromium.org>
In-Reply-To: <20230803074249.3065586-1-wenst@chromium.org>
References: <20230803074249.3065586-1-wenst@chromium.org>
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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@chromium.org>
---
 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 5a43a84c7a3e..f8cdfa992c23 100644
--- a/drivers/regulator/mt6358-regulator.c
+++ b/drivers/regulator/mt6358-regulator.c
@@ -324,6 +324,27 @@ static const struct linear_range vldo28_ranges[] = {
 	REGULATOR_LINEAR_RANGE(3000000, 11, 21, 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, 11, 21, 10000),
+	REGULATOR_LINEAR_RANGE(800000, 22, 32, 10000),
+	REGULATOR_LINEAR_RANGE(900000, 33, 43, 10000),
+	REGULATOR_LINEAR_RANGE(1000000, 44, 54, 10000),
+	REGULATOR_LINEAR_RANGE(1100000, 55, 65, 10000),
+	REGULATOR_LINEAR_RANGE(1200000, 66, 76, 10000),
+	REGULATOR_LINEAR_RANGE(1300000, 77, 87, 10000),
+	REGULATOR_LINEAR_RANGE(1400000, 88, 98, 10000),
+	REGULATOR_LINEAR_RANGE(1500000, 99, 109, 10000),
+	REGULATOR_LINEAR_RANGE(1600000, 110, 120, 10000),
+	REGULATOR_LINEAR_RANGE(1700000, 121, 131, 10000),
+	REGULATOR_LINEAR_RANGE(1800000, 132, 142, 10000),
+	REGULATOR_LINEAR_RANGE(1900000, 143, 153, 10000),
+	REGULATOR_LINEAR_RANGE(2000000, 154, 164, 10000),
+	REGULATOR_LINEAR_RANGE(2100000, 165, 175, 10000),
+};
+
 static unsigned int mt6358_map_mode(unsigned int mode)
 {
 	return mode == MT6358_BUCK_MODE_AUTO ?
@@ -558,7 +579,6 @@ 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),
@@ -591,6 +611,8 @@ 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,
-- 
2.41.0.585.gd2178a4bd4-goog