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Message-ID: <20230913082919.1631287-4-wenst@chromium.org>
Date: Wed, 13 Sep 2023 16:29:18 +0800
From: Chen-Yu Tsai <wenst@...omium.org>
To: Lee Jones <lee@...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>,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org
Subject: [PATCH v3 3/3] regulator: mt6358: Add output voltage fine tuning to variable LDOs
Some of the LDO regulators in the MT6358/MT6366 have sparsely populated
voltage tables, supported by custom get/set operators. While it works,
it requires more code and an extra field to store the lookup table.
These LDOs also have fine voltage calibration settings that can slightly
boost the output voltage from 0 mV to 100 mV, in 10 mV increments.
These combined could be modeled as a pickable set of linear ranges. The
coarse voltage setting is modeled as the range selector, while each
range has 11 selectors, starting from the range's base voltage, up to
+100 mV, in 10mV increments.
Signed-off-by: Chen-Yu Tsai <wenst@...omium.org>
---
Changes since v2:
- selector values for all the linear ranges have been fixed.
I misinterpreted how the selector values for the pickable linear ranges
should be filled in.
Angelo's reviewed-by has been dropped as a result of the change.
drivers/regulator/mt6358-regulator.c | 275 +++++++++++----------------
1 file changed, 115 insertions(+), 160 deletions(-)
diff --git a/drivers/regulator/mt6358-regulator.c b/drivers/regulator/mt6358-regulator.c
index ecb2cd1eb34f..4a6ad0ccf03b 100644
--- a/drivers/regulator/mt6358-regulator.c
+++ b/drivers/regulator/mt6358-regulator.c
@@ -26,8 +26,6 @@ struct mt6358_regulator_info {
struct regulator_desc desc;
u32 status_reg;
u32 qi;
- const u32 *index_table;
- unsigned int n_table;
u32 da_vsel_reg;
u32 da_vsel_mask;
u32 modeset_reg;
@@ -64,9 +62,7 @@ struct mt6358_regulator_info {
.modeset_mask = BIT(_modeset_shift), \
}
-#define MT6358_LDO(match, vreg, ldo_volt_table, \
- ldo_index_table, enreg, enbit, vosel, \
- vosel_mask) \
+#define MT6358_LDO(match, vreg, volt_ranges, enreg, enbit, vosel, vosel_mask) \
[MT6358_ID_##vreg] = { \
.desc = { \
.name = #vreg, \
@@ -75,17 +71,19 @@ struct mt6358_regulator_info {
.type = REGULATOR_VOLTAGE, \
.id = MT6358_ID_##vreg, \
.owner = THIS_MODULE, \
- .n_voltages = ARRAY_SIZE(ldo_volt_table), \
- .volt_table = ldo_volt_table, \
- .vsel_reg = vosel, \
- .vsel_mask = vosel_mask, \
+ .n_voltages = ARRAY_SIZE(volt_ranges##_ranges) * 11, \
+ .linear_ranges = volt_ranges##_ranges, \
+ .linear_range_selectors_bitfield = volt_ranges##_selectors, \
+ .n_linear_ranges = ARRAY_SIZE(volt_ranges##_ranges), \
+ .vsel_range_reg = vosel, \
+ .vsel_range_mask = vosel_mask, \
+ .vsel_reg = MT6358_##vreg##_ANA_CON0, \
+ .vsel_mask = GENMASK(3, 0), \
.enable_reg = enreg, \
.enable_mask = BIT(enbit), \
}, \
.status_reg = MT6358_LDO_##vreg##_CON1, \
.qi = BIT(15), \
- .index_table = ldo_index_table, \
- .n_table = ARRAY_SIZE(ldo_index_table), \
}
#define MT6358_LDO1(match, vreg, min, max, step, \
@@ -163,9 +161,7 @@ struct mt6358_regulator_info {
.modeset_mask = BIT(_modeset_shift), \
}
-#define MT6366_LDO(match, vreg, ldo_volt_table, \
- ldo_index_table, enreg, enbit, vosel, \
- vosel_mask) \
+#define MT6366_LDO(match, vreg, volt_ranges, enreg, enbit, vosel, vosel_mask) \
[MT6366_ID_##vreg] = { \
.desc = { \
.name = #vreg, \
@@ -174,17 +170,19 @@ struct mt6358_regulator_info {
.type = REGULATOR_VOLTAGE, \
.id = MT6366_ID_##vreg, \
.owner = THIS_MODULE, \
- .n_voltages = ARRAY_SIZE(ldo_volt_table), \
- .volt_table = ldo_volt_table, \
- .vsel_reg = vosel, \
- .vsel_mask = vosel_mask, \
+ .n_voltages = ARRAY_SIZE(volt_ranges##_ranges) * 11, \
+ .linear_ranges = volt_ranges##_ranges, \
+ .linear_range_selectors_bitfield = volt_ranges##_selectors, \
+ .n_linear_ranges = ARRAY_SIZE(volt_ranges##_ranges), \
+ .vsel_range_reg = vosel, \
+ .vsel_range_mask = vosel_mask, \
+ .vsel_reg = MT6358_##vreg##_ANA_CON0, \
+ .vsel_mask = GENMASK(3, 0), \
.enable_reg = enreg, \
.enable_mask = BIT(enbit), \
}, \
.status_reg = MT6358_LDO_##vreg##_CON1, \
.qi = BIT(15), \
- .index_table = ldo_index_table, \
- .n_table = ARRAY_SIZE(ldo_index_table), \
}
#define MT6366_LDO1(match, vreg, min, max, step, \
@@ -235,95 +233,95 @@ struct mt6358_regulator_info {
}
-static const unsigned int vdram2_voltages[] = {
- 600000, 1800000,
-};
-
-static const unsigned int vsim_voltages[] = {
- 1700000, 1800000, 2700000, 3000000, 3100000,
-};
-
-static const unsigned int vibr_voltages[] = {
- 1200000, 1300000, 1500000, 1800000,
- 2000000, 2800000, 3000000, 3300000,
+/* VDRAM2 voltage selector not shown in datasheet */
+static const unsigned int vdram2_selectors[] = { 0, 12 };
+static const struct linear_range vdram2_ranges[] = {
+ REGULATOR_LINEAR_RANGE(600000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(1800000, 0, 10, 10000),
};
-static const unsigned int vusb_voltages[] = {
- 3000000, 3100000,
+static const unsigned int vsim_selectors[] = { 3, 4, 8, 11, 12 };
+static const struct linear_range vsim_ranges[] = {
+ REGULATOR_LINEAR_RANGE(1700000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(1800000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(2700000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(3000000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(3100000, 0, 10, 10000),
};
-static const unsigned int vcamd_voltages[] = {
- 900000, 1000000, 1100000, 1200000,
- 1300000, 1500000, 1800000,
+static const unsigned int vibr_selectors[] = { 0, 1, 2, 4, 5, 9, 11, 13 };
+static const struct linear_range vibr_ranges[] = {
+ REGULATOR_LINEAR_RANGE(1200000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(1300000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(1500000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(1800000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(2000000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(2800000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(3000000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(3300000, 0, 10, 10000),
};
-static const unsigned int vefuse_voltages[] = {
- 1700000, 1800000, 1900000,
+/* VUSB voltage selector not shown in datasheet */
+static const unsigned int vusb_selectors[] = { 3, 4 };
+static const struct linear_range vusb_ranges[] = {
+ REGULATOR_LINEAR_RANGE(3000000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(3100000, 0, 10, 10000),
};
-static const unsigned int vmch_vemc_voltages[] = {
- 2900000, 3000000, 3300000,
+static const unsigned int vcamd_selectors[] = { 3, 4, 5, 6, 7, 9, 12 };
+static const struct linear_range vcamd_ranges[] = {
+ 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(1500000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(1800000, 0, 10, 10000),
};
-static const unsigned int vcama_voltages[] = {
- 1800000, 2500000, 2700000,
- 2800000, 2900000, 3000000,
+static const unsigned int vefuse_selectors[] = { 11, 12, 13 };
+static const struct linear_range vefuse_ranges[] = {
+ REGULATOR_LINEAR_RANGE(1700000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(1800000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(1900000, 0, 10, 10000),
};
-static const unsigned int vcn33_voltages[] = {
- 3300000, 3400000, 3500000,
+static const unsigned int vmch_vemc_selectors[] = { 2, 3, 5 };
+static const struct linear_range vmch_vemc_ranges[] = {
+ REGULATOR_LINEAR_RANGE(2900000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(3000000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(3300000, 0, 10, 10000),
};
-static const unsigned int vmc_voltages[] = {
- 1800000, 2900000, 3000000, 3300000,
+static const unsigned int vcama_selectors[] = { 0, 7, 9, 10, 11, 12 };
+static const struct linear_range vcama_ranges[] = {
+ REGULATOR_LINEAR_RANGE(1800000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(2500000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(2700000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(2800000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(2900000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(3000000, 0, 10, 10000),
};
-static const unsigned int vldo28_voltages[] = {
- 2800000, 3000000,
+static const unsigned int vcn33_selectors[] = { 1, 2, 3 };
+static const struct linear_range vcn33_ranges[] = {
+ REGULATOR_LINEAR_RANGE(3300000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(3400000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(3500000, 0, 10, 10000),
};
-static const u32 vdram2_idx[] = {
- 0, 12,
+static const unsigned int vmc_selectors[] = { 4, 10, 11, 13 };
+static const struct linear_range vmc_ranges[] = {
+ REGULATOR_LINEAR_RANGE(1800000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(2900000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(3000000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(3300000, 0, 10, 10000),
};
-static const u32 vsim_idx[] = {
- 3, 4, 8, 11, 12,
-};
-
-static const u32 vibr_idx[] = {
- 0, 1, 2, 4, 5, 9, 11, 13,
-};
-
-static const u32 vusb_idx[] = {
- 3, 4,
-};
-
-static const u32 vcamd_idx[] = {
- 3, 4, 5, 6, 7, 9, 12,
-};
-
-static const u32 vefuse_idx[] = {
- 11, 12, 13,
-};
-
-static const u32 vmch_vemc_idx[] = {
- 2, 3, 5,
-};
-
-static const u32 vcama_idx[] = {
- 0, 7, 9, 10, 11, 12,
-};
-
-static const u32 vcn33_idx[] = {
- 1, 2, 3,
-};
-
-static const u32 vmc_idx[] = {
- 4, 10, 11, 13,
-};
-
-static const u32 vldo28_idx[] = {
- 1, 3,
+static const unsigned int vldo28_selectors[] = { 1, 3 };
+static const struct linear_range vldo28_ranges[] = {
+ REGULATOR_LINEAR_RANGE(2800000, 0, 10, 10000),
+ REGULATOR_LINEAR_RANGE(3000000, 0, 10, 10000),
};
static unsigned int mt6358_map_mode(unsigned int mode)
@@ -332,49 +330,6 @@ static unsigned int mt6358_map_mode(unsigned int mode)
REGULATOR_MODE_NORMAL : REGULATOR_MODE_FAST;
}
-static int mt6358_set_voltage_sel(struct regulator_dev *rdev,
- unsigned int selector)
-{
- const struct mt6358_regulator_info *info = to_regulator_info(rdev->desc);
- int idx, ret;
- const u32 *pvol;
-
- pvol = info->index_table;
-
- idx = pvol[selector];
- idx <<= ffs(info->desc.vsel_mask) - 1;
- ret = regmap_update_bits(rdev->regmap, info->desc.vsel_reg,
- info->desc.vsel_mask, idx);
-
- return ret;
-}
-
-static int mt6358_get_voltage_sel(struct regulator_dev *rdev)
-{
- const struct mt6358_regulator_info *info = to_regulator_info(rdev->desc);
- int idx, ret;
- u32 selector;
- const u32 *pvol;
-
- ret = regmap_read(rdev->regmap, info->desc.vsel_reg, &selector);
- if (ret != 0) {
- dev_info(&rdev->dev,
- "Failed to get mt6358 %s vsel reg: %d\n",
- info->desc.name, ret);
- return ret;
- }
-
- selector = (selector & info->desc.vsel_mask) >>
- (ffs(info->desc.vsel_mask) - 1);
- pvol = info->index_table;
- for (idx = 0; idx < info->desc.n_voltages; idx++) {
- if (pvol[idx] == selector)
- return idx;
- }
-
- return -EINVAL;
-}
-
static int mt6358_get_buck_voltage_sel(struct regulator_dev *rdev)
{
const struct mt6358_regulator_info *info = to_regulator_info(rdev->desc);
@@ -477,10 +432,10 @@ static const struct regulator_ops mt6358_volt_range_ops = {
};
static const struct regulator_ops mt6358_volt_table_ops = {
- .list_voltage = regulator_list_voltage_table,
- .map_voltage = regulator_map_voltage_iterate,
- .set_voltage_sel = mt6358_set_voltage_sel,
- .get_voltage_sel = mt6358_get_voltage_sel,
+ .list_voltage = regulator_list_voltage_pickable_linear_range,
+ .map_voltage = regulator_map_voltage_pickable_linear_range,
+ .set_voltage_sel = regulator_set_voltage_sel_pickable_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_pickable_regmap,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
@@ -540,34 +495,34 @@ static const struct mt6358_regulator_info mt6358_regulators[] = {
MT6358_REG_FIXED("ldo_vrf18", VRF18, MT6358_LDO_VRF18_CON0, 0, 1800000),
MT6358_REG_FIXED("ldo_vaud28", VAUD28,
MT6358_LDO_VAUD28_CON0, 0, 2800000),
- MT6358_LDO("ldo_vdram2", VDRAM2, vdram2_voltages, vdram2_idx,
+ MT6358_LDO("ldo_vdram2", VDRAM2, vdram2,
MT6358_LDO_VDRAM2_CON0, 0, MT6358_LDO_VDRAM2_ELR0, 0xf),
- MT6358_LDO("ldo_vsim1", VSIM1, vsim_voltages, vsim_idx,
+ MT6358_LDO("ldo_vsim1", VSIM1, vsim,
MT6358_LDO_VSIM1_CON0, 0, MT6358_VSIM1_ANA_CON0, 0xf00),
- MT6358_LDO("ldo_vibr", VIBR, vibr_voltages, vibr_idx,
+ MT6358_LDO("ldo_vibr", VIBR, vibr,
MT6358_LDO_VIBR_CON0, 0, MT6358_VIBR_ANA_CON0, 0xf00),
- MT6358_LDO("ldo_vusb", VUSB, vusb_voltages, vusb_idx,
+ MT6358_LDO("ldo_vusb", VUSB, vusb,
MT6358_LDO_VUSB_CON0_0, 0, MT6358_VUSB_ANA_CON0, 0x700),
- MT6358_LDO("ldo_vcamd", VCAMD, vcamd_voltages, vcamd_idx,
+ MT6358_LDO("ldo_vcamd", VCAMD, vcamd,
MT6358_LDO_VCAMD_CON0, 0, MT6358_VCAMD_ANA_CON0, 0xf00),
- MT6358_LDO("ldo_vefuse", VEFUSE, vefuse_voltages, vefuse_idx,
+ MT6358_LDO("ldo_vefuse", VEFUSE, vefuse,
MT6358_LDO_VEFUSE_CON0, 0, MT6358_VEFUSE_ANA_CON0, 0xf00),
- MT6358_LDO("ldo_vmch", VMCH, vmch_vemc_voltages, vmch_vemc_idx,
+ MT6358_LDO("ldo_vmch", VMCH, vmch_vemc,
MT6358_LDO_VMCH_CON0, 0, MT6358_VMCH_ANA_CON0, 0x700),
- MT6358_LDO("ldo_vcama1", VCAMA1, vcama_voltages, vcama_idx,
+ MT6358_LDO("ldo_vcama1", VCAMA1, vcama,
MT6358_LDO_VCAMA1_CON0, 0, MT6358_VCAMA1_ANA_CON0, 0xf00),
- MT6358_LDO("ldo_vemc", VEMC, vmch_vemc_voltages, vmch_vemc_idx,
+ MT6358_LDO("ldo_vemc", VEMC, vmch_vemc,
MT6358_LDO_VEMC_CON0, 0, MT6358_VEMC_ANA_CON0, 0x700),
- MT6358_LDO("ldo_vcn33", VCN33, vcn33_voltages, vcn33_idx,
+ MT6358_LDO("ldo_vcn33", VCN33, vcn33,
MT6358_LDO_VCN33_CON0_0, 0, MT6358_VCN33_ANA_CON0, 0x300),
- MT6358_LDO("ldo_vcama2", VCAMA2, vcama_voltages, vcama_idx,
+ MT6358_LDO("ldo_vcama2", VCAMA2, vcama,
MT6358_LDO_VCAMA2_CON0, 0, MT6358_VCAMA2_ANA_CON0, 0xf00),
- MT6358_LDO("ldo_vmc", VMC, vmc_voltages, vmc_idx,
+ MT6358_LDO("ldo_vmc", VMC, vmc,
MT6358_LDO_VMC_CON0, 0, MT6358_VMC_ANA_CON0, 0xf00),
- MT6358_LDO("ldo_vldo28", VLDO28, vldo28_voltages, vldo28_idx,
+ MT6358_LDO("ldo_vldo28", VLDO28, vldo28,
MT6358_LDO_VLDO28_CON0_0, 0,
MT6358_VLDO28_ANA_CON0, 0x300),
- MT6358_LDO("ldo_vsim2", VSIM2, vsim_voltages, vsim_idx,
+ MT6358_LDO("ldo_vsim2", VSIM2, vsim,
MT6358_LDO_VSIM2_CON0, 0, MT6358_VSIM2_ANA_CON0, 0xf00),
MT6358_LDO1("ldo_vsram_proc11", VSRAM_PROC11, 500000, 1293750, 6250,
MT6358_LDO_VSRAM_PROC11_DBG0, 0x7f00, MT6358_LDO_VSRAM_CON0, 0x7f),
@@ -616,25 +571,25 @@ static const struct mt6358_regulator_info mt6366_regulators[] = {
MT6366_REG_FIXED("ldo_vrf18", VRF18, MT6358_LDO_VRF18_CON0, 0, 1800000),
MT6366_REG_FIXED("ldo_vaud28", VAUD28,
MT6358_LDO_VAUD28_CON0, 0, 2800000),
- MT6366_LDO("ldo_vdram2", VDRAM2, vdram2_voltages, vdram2_idx,
+ MT6366_LDO("ldo_vdram2", VDRAM2, vdram2,
MT6358_LDO_VDRAM2_CON0, 0, MT6358_LDO_VDRAM2_ELR0, 0x10),
- MT6366_LDO("ldo_vsim1", VSIM1, vsim_voltages, vsim_idx,
+ MT6366_LDO("ldo_vsim1", VSIM1, vsim,
MT6358_LDO_VSIM1_CON0, 0, MT6358_VSIM1_ANA_CON0, 0xf00),
- MT6366_LDO("ldo_vibr", VIBR, vibr_voltages, vibr_idx,
+ MT6366_LDO("ldo_vibr", VIBR, vibr,
MT6358_LDO_VIBR_CON0, 0, MT6358_VIBR_ANA_CON0, 0xf00),
- MT6366_LDO("ldo_vusb", VUSB, vusb_voltages, vusb_idx,
+ MT6366_LDO("ldo_vusb", VUSB, vusb,
MT6358_LDO_VUSB_CON0_0, 0, MT6358_VUSB_ANA_CON0, 0x700),
- MT6366_LDO("ldo_vefuse", VEFUSE, vefuse_voltages, vefuse_idx,
+ MT6366_LDO("ldo_vefuse", VEFUSE, vefuse,
MT6358_LDO_VEFUSE_CON0, 0, MT6358_VEFUSE_ANA_CON0, 0xf00),
- MT6366_LDO("ldo_vmch", VMCH, vmch_vemc_voltages, vmch_vemc_idx,
+ MT6366_LDO("ldo_vmch", VMCH, vmch_vemc,
MT6358_LDO_VMCH_CON0, 0, MT6358_VMCH_ANA_CON0, 0x700),
- MT6366_LDO("ldo_vemc", VEMC, vmch_vemc_voltages, vmch_vemc_idx,
+ MT6366_LDO("ldo_vemc", VEMC, vmch_vemc,
MT6358_LDO_VEMC_CON0, 0, MT6358_VEMC_ANA_CON0, 0x700),
- MT6366_LDO("ldo_vcn33", VCN33, vcn33_voltages, vcn33_idx,
+ MT6366_LDO("ldo_vcn33", VCN33, vcn33,
MT6358_LDO_VCN33_CON0_0, 0, MT6358_VCN33_ANA_CON0, 0x300),
- MT6366_LDO("ldo_vmc", VMC, vmc_voltages, vmc_idx,
+ MT6366_LDO("ldo_vmc", VMC, vmc,
MT6358_LDO_VMC_CON0, 0, MT6358_VMC_ANA_CON0, 0xf00),
- MT6366_LDO("ldo_vsim2", VSIM2, vsim_voltages, vsim_idx,
+ MT6366_LDO("ldo_vsim2", VSIM2, vsim,
MT6358_LDO_VSIM2_CON0, 0, MT6358_VSIM2_ANA_CON0, 0xf00),
MT6366_LDO1("ldo_vsram_proc11", VSRAM_PROC11, 500000, 1293750, 6250,
MT6358_LDO_VSRAM_PROC11_DBG0, 0x7f00, MT6358_LDO_VSRAM_CON0, 0x7f),
--
2.42.0.283.g2d96d420d3-goog
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