regulator: pcf50633: Use linear_min_sel and regulator_[map|list]_voltage_linear
This driver can be converted to use linear_min_sel and
regulator_[map|list]_voltage_linear.
Below shows the equation (from Datasheet) for each LDOs.
For AUTOOUT:
VO(prog) = 0.625 + auto_out x 0.025 V; e.g.
(00000000 to 00101110: reserved)
00101111: 1.8 V (min)
01010011: 2.7 V
01101010: 3.275 V
01101011: 3.300 V
01101100: 3.325 V
01111111 : 3.800 V (max)
The linear mapping start from 0x2f selector.
Thus we convert this equation to:
VO(prog) = 1.8 + (selector - linear_min_sel) x 0.025 V
(min_uV = 1800000, uV_step = 25000, linear_min_sel = 0x2f)
For DOWNxOUT:
VO(prog) = 0.625 + downx_out x 0.025 V; e.g.
00000000 : 0.625 V (min)
00010111 : 1.200 V
00101111 : 1.800 V
01011111 : 3.000 V (max)
For xLDOOUT:
VO(prog) = 0.9 + xldo_out x 0.1 V; e.g.
00000: 0.9 V
00001: 1.0 V
11000 : 3.3 V
11011 : 3.6 V
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Axel Lin
Mark Brown
Родитель
6b1f8a4566
Коммит
05cf34c1af
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@ -24,12 +24,15 @@
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#include <linux/mfd/pcf50633/core.h>
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#include <linux/mfd/pcf50633/pmic.h>
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#define PCF50633_REGULATOR(_name, _id, _n) \
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#define PCF50633_REGULATOR(_name, _id, _min_uV, _uV_step, _min_sel, _n) \
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{ \
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.name = _name, \
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.id = PCF50633_REGULATOR_##_id, \
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.ops = &pcf50633_regulator_ops, \
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.n_voltages = _n, \
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.min_uV = _min_uV, \
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.uV_step = _uV_step, \
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.linear_min_sel = _min_sel, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.vsel_reg = PCF50633_REG_##_id##OUT, \
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@ -38,162 +41,39 @@
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.enable_mask = PCF50633_REGULATOR_ON, \
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}
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/* Bits from voltage value */
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static u8 auto_voltage_bits(unsigned int millivolts)
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{
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if (millivolts < 1800)
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return 0x2f;
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if (millivolts > 3800)
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return 0xff;
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millivolts -= 625;
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return millivolts / 25;
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}
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static u8 down_voltage_bits(unsigned int millivolts)
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{
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if (millivolts < 625)
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return 0;
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else if (millivolts > 3000)
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return 0xff;
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millivolts -= 625;
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return millivolts / 25;
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}
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static u8 ldo_voltage_bits(unsigned int millivolts)
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{
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if (millivolts < 900)
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return 0;
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else if (millivolts > 3600)
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return 0x1f;
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millivolts -= 900;
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return millivolts / 100;
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}
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/* Obtain voltage value from bits */
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static unsigned int auto_voltage_value(u8 bits)
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{
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/* AUTOOUT: 00000000 to 00101110 are reserved.
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* Return 0 for bits in reserved range, which means this selector code
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* can't be used on this system */
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if (bits < 0x2f)
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return 0;
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return 625 + (bits * 25);
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}
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static unsigned int down_voltage_value(u8 bits)
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{
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return 625 + (bits * 25);
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}
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static unsigned int ldo_voltage_value(u8 bits)
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{
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bits &= 0x1f;
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return 900 + (bits * 100);
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}
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static int pcf50633_regulator_map_voltage(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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struct pcf50633 *pcf;
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int regulator_id, millivolts;
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u8 volt_bits;
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pcf = rdev_get_drvdata(rdev);
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regulator_id = rdev_get_id(rdev);
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if (regulator_id >= PCF50633_NUM_REGULATORS)
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return -EINVAL;
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millivolts = min_uV / 1000;
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switch (regulator_id) {
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case PCF50633_REGULATOR_AUTO:
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volt_bits = auto_voltage_bits(millivolts);
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break;
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case PCF50633_REGULATOR_DOWN1:
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case PCF50633_REGULATOR_DOWN2:
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volt_bits = down_voltage_bits(millivolts);
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break;
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case PCF50633_REGULATOR_LDO1:
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case PCF50633_REGULATOR_LDO2:
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case PCF50633_REGULATOR_LDO3:
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case PCF50633_REGULATOR_LDO4:
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case PCF50633_REGULATOR_LDO5:
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case PCF50633_REGULATOR_LDO6:
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case PCF50633_REGULATOR_HCLDO:
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case PCF50633_REGULATOR_MEMLDO:
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volt_bits = ldo_voltage_bits(millivolts);
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break;
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default:
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return -EINVAL;
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}
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return volt_bits;
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}
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static int pcf50633_regulator_list_voltage(struct regulator_dev *rdev,
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unsigned int index)
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{
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int regulator_id = rdev_get_id(rdev);
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int millivolts;
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switch (regulator_id) {
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case PCF50633_REGULATOR_AUTO:
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millivolts = auto_voltage_value(index);
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break;
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case PCF50633_REGULATOR_DOWN1:
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case PCF50633_REGULATOR_DOWN2:
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millivolts = down_voltage_value(index);
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break;
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case PCF50633_REGULATOR_LDO1:
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case PCF50633_REGULATOR_LDO2:
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case PCF50633_REGULATOR_LDO3:
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case PCF50633_REGULATOR_LDO4:
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case PCF50633_REGULATOR_LDO5:
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case PCF50633_REGULATOR_LDO6:
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case PCF50633_REGULATOR_HCLDO:
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case PCF50633_REGULATOR_MEMLDO:
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millivolts = ldo_voltage_value(index);
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break;
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default:
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return -EINVAL;
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}
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return millivolts * 1000;
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}
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static struct regulator_ops pcf50633_regulator_ops = {
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.list_voltage = pcf50633_regulator_list_voltage,
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.map_voltage = pcf50633_regulator_map_voltage,
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.list_voltage = regulator_list_voltage_linear,
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.map_voltage = regulator_map_voltage_linear,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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};
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static const struct regulator_desc regulators[] = {
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[PCF50633_REGULATOR_AUTO] = PCF50633_REGULATOR("auto", AUTO, 128),
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[PCF50633_REGULATOR_DOWN1] = PCF50633_REGULATOR("down1", DOWN1, 96),
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[PCF50633_REGULATOR_DOWN2] = PCF50633_REGULATOR("down2", DOWN2, 96),
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[PCF50633_REGULATOR_LDO1] = PCF50633_REGULATOR("ldo1", LDO1, 28),
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[PCF50633_REGULATOR_LDO2] = PCF50633_REGULATOR("ldo2", LDO2, 28),
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[PCF50633_REGULATOR_LDO3] = PCF50633_REGULATOR("ldo3", LDO3, 28),
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[PCF50633_REGULATOR_LDO4] = PCF50633_REGULATOR("ldo4", LDO4, 28),
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[PCF50633_REGULATOR_LDO5] = PCF50633_REGULATOR("ldo5", LDO5, 28),
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[PCF50633_REGULATOR_LDO6] = PCF50633_REGULATOR("ldo6", LDO6, 28),
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[PCF50633_REGULATOR_HCLDO] = PCF50633_REGULATOR("hcldo", HCLDO, 28),
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[PCF50633_REGULATOR_MEMLDO] = PCF50633_REGULATOR("memldo", MEMLDO, 28),
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[PCF50633_REGULATOR_AUTO] =
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PCF50633_REGULATOR("auto", AUTO, 1800000, 25000, 0x2f, 128),
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[PCF50633_REGULATOR_DOWN1] =
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PCF50633_REGULATOR("down1", DOWN1, 625000, 25000, 0, 96),
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[PCF50633_REGULATOR_DOWN2] =
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PCF50633_REGULATOR("down2", DOWN2, 625000, 25000, 0, 96),
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[PCF50633_REGULATOR_LDO1] =
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PCF50633_REGULATOR("ldo1", LDO1, 900000, 100000, 0, 28),
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[PCF50633_REGULATOR_LDO2] =
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PCF50633_REGULATOR("ldo2", LDO2, 900000, 100000, 0, 28),
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[PCF50633_REGULATOR_LDO3] =
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PCF50633_REGULATOR("ldo3", LDO3, 900000, 100000, 0, 28),
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[PCF50633_REGULATOR_LDO4] =
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PCF50633_REGULATOR("ldo4", LDO4, 900000, 100000, 0, 28),
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[PCF50633_REGULATOR_LDO5] =
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PCF50633_REGULATOR("ldo5", LDO5, 900000, 100000, 0, 28),
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[PCF50633_REGULATOR_LDO6] =
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PCF50633_REGULATOR("ldo6", LDO6, 900000, 100000, 0, 28),
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[PCF50633_REGULATOR_HCLDO] =
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PCF50633_REGULATOR("hcldo", HCLDO, 900000, 100000, 0, 28),
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[PCF50633_REGULATOR_MEMLDO] =
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PCF50633_REGULATOR("memldo", MEMLDO, 900000, 100000, 0, 28),
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};
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static int __devinit pcf50633_regulator_probe(struct platform_device *pdev)
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