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linux-stable/drivers/regulator/mt6380-regulator.c
Minghao Chi 1f156b4285
regulator: remove redundant ret variable 
Return value from regmap_update_bits() directly instead
of taking this in another redundant variable.

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Signed-off-by: CGEL ZTE <cgel.zte@gmail.com>
Link: https://lore.kernel.org/r/20220104104139.601031-1-chi.minghao@zte.com.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
2022-01-04 15:00:39 +00:00

341 lines
12 KiB
C
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// SPDX-License-Identifier: GPL-2.0
//
// Copyright (c) 2017 MediaTek Inc.
// Author: Chenglin Xu <chenglin.xu@mediatek.com>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/mt6380-regulator.h>
#include <linux/regulator/of_regulator.h>
/* PMIC Registers */
#define MT6380_ALDO_CON_0 0x0000
#define MT6380_BTLDO_CON_0 0x0004
#define MT6380_COMP_CON_0 0x0008
#define MT6380_CPUBUCK_CON_0 0x000C
#define MT6380_CPUBUCK_CON_1 0x0010
#define MT6380_CPUBUCK_CON_2 0x0014
#define MT6380_DDRLDO_CON_0 0x0018
#define MT6380_MLDO_CON_0 0x001C
#define MT6380_PALDO_CON_0 0x0020
#define MT6380_PHYLDO_CON_0 0x0024
#define MT6380_SIDO_CON_0 0x0028
#define MT6380_SIDO_CON_1 0x002C
#define MT6380_SIDO_CON_2 0x0030
#define MT6380_SLDO_CON_0 0x0034
#define MT6380_TLDO_CON_0 0x0038
#define MT6380_STARTUP_CON_0 0x003C
#define MT6380_STARTUP_CON_1 0x0040
#define MT6380_SMPS_TOP_CON_0 0x0044
#define MT6380_SMPS_TOP_CON_1 0x0048
#define MT6380_ANA_CTRL_0 0x0050
#define MT6380_ANA_CTRL_1 0x0054
#define MT6380_ANA_CTRL_2 0x0058
#define MT6380_ANA_CTRL_3 0x005C
#define MT6380_ANA_CTRL_4 0x0060
#define MT6380_SPK_CON9 0x0064
#define MT6380_SPK_CON11 0x0068
#define MT6380_SPK_CON12 0x006A
#define MT6380_CLK_CTRL 0x0070
#define MT6380_PINMUX_CTRL 0x0074
#define MT6380_IO_CTRL 0x0078
#define MT6380_SLP_MODE_CTRL_0 0x007C
#define MT6380_SLP_MODE_CTRL_1 0x0080
#define MT6380_SLP_MODE_CTRL_2 0x0084
#define MT6380_SLP_MODE_CTRL_3 0x0088
#define MT6380_SLP_MODE_CTRL_4 0x008C
#define MT6380_SLP_MODE_CTRL_5 0x0090
#define MT6380_SLP_MODE_CTRL_6 0x0094
#define MT6380_SLP_MODE_CTRL_7 0x0098
#define MT6380_SLP_MODE_CTRL_8 0x009C
#define MT6380_FCAL_CTRL_0 0x00A0
#define MT6380_FCAL_CTRL_1 0x00A4
#define MT6380_LDO_CTRL_0 0x00A8
#define MT6380_LDO_CTRL_1 0x00AC
#define MT6380_LDO_CTRL_2 0x00B0
#define MT6380_LDO_CTRL_3 0x00B4
#define MT6380_LDO_CTRL_4 0x00B8
#define MT6380_DEBUG_CTRL_0 0x00BC
#define MT6380_EFU_CTRL_0 0x0200
#define MT6380_EFU_CTRL_1 0x0201
#define MT6380_EFU_CTRL_2 0x0202
#define MT6380_EFU_CTRL_3 0x0203
#define MT6380_EFU_CTRL_4 0x0204
#define MT6380_EFU_CTRL_5 0x0205
#define MT6380_EFU_CTRL_6 0x0206
#define MT6380_EFU_CTRL_7 0x0207
#define MT6380_EFU_CTRL_8 0x0208
#define MT6380_REGULATOR_MODE_AUTO 0
#define MT6380_REGULATOR_MODE_FORCE_PWM 1
/*
* mt6380 regulators' information
*
* @desc: standard fields of regulator description
* @vselon_reg: Register sections for hardware control mode of bucks
* @modeset_reg: Register for controlling the buck/LDO control mode
* @modeset_mask: Mask for controlling the buck/LDO control mode
*/
struct mt6380_regulator_info {
struct regulator_desc desc;
u32 vselon_reg;
u32 modeset_reg;
u32 modeset_mask;
};
#define MT6380_BUCK(match, vreg, min, max, step, volt_ranges, enreg, \
vosel, vosel_mask, enbit, voselon, _modeset_reg, \
_modeset_mask) \
[MT6380_ID_##vreg] = { \
.desc = { \
.name = #vreg, \
.of_match = of_match_ptr(match), \
.ops = &mt6380_volt_range_ops, \
.type = REGULATOR_VOLTAGE, \
.id = MT6380_ID_##vreg, \
.owner = THIS_MODULE, \
.n_voltages = ((max) - (min)) / (step) + 1, \
.linear_ranges = volt_ranges, \
.n_linear_ranges = ARRAY_SIZE(volt_ranges), \
.vsel_reg = vosel, \
.vsel_mask = vosel_mask, \
.enable_reg = enreg, \
.enable_mask = BIT(enbit), \
}, \
.vselon_reg = voselon, \
.modeset_reg = _modeset_reg, \
.modeset_mask = _modeset_mask, \
}
#define MT6380_LDO(match, vreg, ldo_volt_table, enreg, enbit, vosel, \
vosel_mask, _modeset_reg, _modeset_mask) \
[MT6380_ID_##vreg] = { \
.desc = { \
.name = #vreg, \
.of_match = of_match_ptr(match), \
.ops = &mt6380_volt_table_ops, \
.type = REGULATOR_VOLTAGE, \
.id = MT6380_ID_##vreg, \
.owner = THIS_MODULE, \
.n_voltages = ARRAY_SIZE(ldo_volt_table), \
.volt_table = ldo_volt_table, \
.vsel_reg = vosel, \
.vsel_mask = vosel_mask, \
.enable_reg = enreg, \
.enable_mask = BIT(enbit), \
}, \
.modeset_reg = _modeset_reg, \
.modeset_mask = _modeset_mask, \
}
#define MT6380_REG_FIXED(match, vreg, enreg, enbit, volt, \
_modeset_reg, _modeset_mask) \
[MT6380_ID_##vreg] = { \
.desc = { \
.name = #vreg, \
.of_match = of_match_ptr(match), \
.ops = &mt6380_volt_fixed_ops, \
.type = REGULATOR_VOLTAGE, \
.id = MT6380_ID_##vreg, \
.owner = THIS_MODULE, \
.n_voltages = 1, \
.enable_reg = enreg, \
.enable_mask = BIT(enbit), \
.min_uV = volt, \
}, \
.modeset_reg = _modeset_reg, \
.modeset_mask = _modeset_mask, \
}
static const struct linear_range buck_volt_range1[] = {
REGULATOR_LINEAR_RANGE(600000, 0, 0xfe, 6250),
};
static const struct linear_range buck_volt_range2[] = {
REGULATOR_LINEAR_RANGE(600000, 0, 0xfe, 6250),
};
static const struct linear_range buck_volt_range3[] = {
REGULATOR_LINEAR_RANGE(1200000, 0, 0x3c, 25000),
};
static const unsigned int ldo_volt_table1[] = {
1400000, 1350000, 1300000, 1250000, 1200000, 1150000, 1100000, 1050000,
};
static const unsigned int ldo_volt_table2[] = {
2200000, 3300000,
};
static const unsigned int ldo_volt_table3[] = {
1240000, 1390000, 1540000, 1840000,
};
static const unsigned int ldo_volt_table4[] = {
2200000, 3300000,
};
static int mt6380_regulator_set_mode(struct regulator_dev *rdev,
unsigned int mode)
{
int val = 0;
struct mt6380_regulator_info *info = rdev_get_drvdata(rdev);
switch (mode) {
case REGULATOR_MODE_NORMAL:
val = MT6380_REGULATOR_MODE_AUTO;
break;
case REGULATOR_MODE_FAST:
val = MT6380_REGULATOR_MODE_FORCE_PWM;
break;
default:
return -EINVAL;
}
val <<= ffs(info->modeset_mask) - 1;
return regmap_update_bits(rdev->regmap, info->modeset_reg,
info->modeset_mask, val);
}
static unsigned int mt6380_regulator_get_mode(struct regulator_dev *rdev)
{
unsigned int val;
unsigned int mode;
int ret;
struct mt6380_regulator_info *info = rdev_get_drvdata(rdev);
ret = regmap_read(rdev->regmap, info->modeset_reg, &val);
if (ret < 0)
return ret;
val &= info->modeset_mask;
val >>= ffs(info->modeset_mask) - 1;
switch (val) {
case MT6380_REGULATOR_MODE_AUTO:
mode = REGULATOR_MODE_NORMAL;
break;
case MT6380_REGULATOR_MODE_FORCE_PWM:
mode = REGULATOR_MODE_FAST;
break;
default:
return -EINVAL;
}
return mode;
}
static const struct regulator_ops mt6380_volt_range_ops = {
.list_voltage = regulator_list_voltage_linear_range,
.map_voltage = regulator_map_voltage_linear_range,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.set_mode = mt6380_regulator_set_mode,
.get_mode = mt6380_regulator_get_mode,
};
static const struct regulator_ops mt6380_volt_table_ops = {
.list_voltage = regulator_list_voltage_table,
.map_voltage = regulator_map_voltage_iterate,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.set_mode = mt6380_regulator_set_mode,
.get_mode = mt6380_regulator_get_mode,
};
static const struct regulator_ops mt6380_volt_fixed_ops = {
.list_voltage = regulator_list_voltage_linear,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.set_mode = mt6380_regulator_set_mode,
.get_mode = mt6380_regulator_get_mode,
};
/* The array is indexed by id(MT6380_ID_XXX) */
static struct mt6380_regulator_info mt6380_regulators[] = {
MT6380_BUCK("buck-vcore1", VCPU, 600000, 1393750, 6250,
buck_volt_range1, MT6380_ANA_CTRL_3, MT6380_ANA_CTRL_1,
0xfe, 3, MT6380_ANA_CTRL_1,
MT6380_CPUBUCK_CON_0, 0x8000000),
MT6380_BUCK("buck-vcore", VCORE, 600000, 1393750, 6250,
buck_volt_range2, MT6380_ANA_CTRL_3, MT6380_ANA_CTRL_2,
0xfe, 2, MT6380_ANA_CTRL_2, MT6380_SIDO_CON_0, 0x1000000),
MT6380_BUCK("buck-vrf", VRF, 1200000, 1575000, 25000,
buck_volt_range3, MT6380_ANA_CTRL_3, MT6380_SIDO_CON_0,
0x78, 1, MT6380_SIDO_CON_0, MT6380_SIDO_CON_0, 0x8000),
MT6380_LDO("ldo-vm", VMLDO, ldo_volt_table1, MT6380_LDO_CTRL_0,
1, MT6380_MLDO_CON_0, 0xE000, MT6380_ANA_CTRL_1, 0x4000000),
MT6380_LDO("ldo-va", VALDO, ldo_volt_table2, MT6380_LDO_CTRL_0,
2, MT6380_ALDO_CON_0, 0x400, MT6380_ALDO_CON_0, 0x20),
MT6380_REG_FIXED("ldo-vphy", VPHYLDO, MT6380_LDO_CTRL_0, 7, 1800000,
MT6380_PHYLDO_CON_0, 0x80),
MT6380_LDO("ldo-vddr", VDDRLDO, ldo_volt_table3, MT6380_LDO_CTRL_0,
8, MT6380_DDRLDO_CON_0, 0x3000, MT6380_DDRLDO_CON_0, 0x80),
MT6380_LDO("ldo-vt", VTLDO, ldo_volt_table4, MT6380_LDO_CTRL_0, 3,
MT6380_TLDO_CON_0, 0x400, MT6380_TLDO_CON_0, 0x20),
};
static int mt6380_regulator_probe(struct platform_device *pdev)
{
struct regmap *regmap = dev_get_regmap(pdev->dev.parent, NULL);
struct regulator_config config = {};
struct regulator_dev *rdev;
int i;
for (i = 0; i < MT6380_MAX_REGULATOR; i++) {
config.dev = &pdev->dev;
config.driver_data = &mt6380_regulators[i];
config.regmap = regmap;
rdev = devm_regulator_register(&pdev->dev,
&mt6380_regulators[i].desc,
&config);
if (IS_ERR(rdev)) {
dev_err(&pdev->dev, "failed to register %s\n",
mt6380_regulators[i].desc.name);
return PTR_ERR(rdev);
}
}
return 0;
}
static const struct platform_device_id mt6380_platform_ids[] = {
{"mt6380-regulator", 0},
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(platform, mt6380_platform_ids);
static const struct of_device_id mt6380_of_match[] = {
{ .compatible = "mediatek,mt6380-regulator", },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, mt6380_of_match);
static struct platform_driver mt6380_regulator_driver = {
.driver = {
.name = "mt6380-regulator",
.of_match_table = of_match_ptr(mt6380_of_match),
},
.probe = mt6380_regulator_probe,
.id_table = mt6380_platform_ids,
};
module_platform_driver(mt6380_regulator_driver);
MODULE_AUTHOR("Chenglin Xu <chenglin.xu@mediatek.com>");
MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6380 PMIC");
MODULE_LICENSE("GPL v2");
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