This driver handles most voltage regulators found in X-Powers AXP PMICs. It is based on, and intended to replace, the regulator driver in TF-A.
AXP PMIC regulators can be divided into 6 categories: - Switches without voltage control => fully supported. - Single linear range => fully supported. - Two linear ranges, "step" and "2 * step" => fully supported. - Two linear ranges, "step" and "5 * step" => only the first range is supported. No boards are known to use the second range. - Non-linear voltage values => fully supported. - LDOs shared with GPIO pins => not supported.
Signed-off-by: Samuel Holland samuel@sholland.org ---
Changes in v2: - Dual-license the driver - Add a comment about the requirements for the voltage table - Fix AXP22x ALDO3 enable bit position
drivers/power/regulator/Kconfig | 14 ++ drivers/power/regulator/Makefile | 1 + drivers/power/regulator/axp_regulator.c | 312 ++++++++++++++++++++++++ 3 files changed, 327 insertions(+) create mode 100644 drivers/power/regulator/axp_regulator.c
diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig index c02e6377d8..c346d03507 100644 --- a/drivers/power/regulator/Kconfig +++ b/drivers/power/regulator/Kconfig @@ -43,6 +43,20 @@ config REGULATOR_AS3722 but does not yet support change voltages. Currently this must be done using direct register writes to the PMIC.
+config REGULATOR_AXP + bool "Enable driver for X-Powers AXP PMIC regulators" + depends on DM_REGULATOR && PMIC_AXP + help + Enable support for the regulators (DCDCs, LDOs) in the + X-Powers AXP152, AXP2xx, and AXP8xx PMICs. + +config SPL_REGULATOR_AXP + bool "Enable driver for X-Powers AXP PMIC regulators in SPL" + depends on SPL_DM_REGULATOR && SPL_PMIC_AXP + help + Enable support in SPL for the regulators (DCDCs, LDOs) in the + X-Powers AXP152, AXP2xx, and AXP8xx PMICs. + config DM_REGULATOR_BD71837 bool "Enable Driver Model for ROHM BD71837/BD71847 regulators" depends on DM_REGULATOR && DM_PMIC_BD71837 diff --git a/drivers/power/regulator/Makefile b/drivers/power/regulator/Makefile index 68e4c0f9dd..2d97e1033a 100644 --- a/drivers/power/regulator/Makefile +++ b/drivers/power/regulator/Makefile @@ -7,6 +7,7 @@ obj-$(CONFIG_$(SPL_)DM_REGULATOR) += regulator-uclass.o obj-$(CONFIG_REGULATOR_ACT8846) += act8846.o obj-$(CONFIG_REGULATOR_AS3722) += as3722_regulator.o +obj-$(CONFIG_$(SPL_)REGULATOR_AXP) += axp_regulator.o obj-$(CONFIG_$(SPL_)DM_REGULATOR_DA9063) += da9063.o obj-$(CONFIG_DM_REGULATOR_MAX77686) += max77686.o obj-$(CONFIG_DM_REGULATOR_NPCM8XX) += npcm8xx_regulator.o diff --git a/drivers/power/regulator/axp_regulator.c b/drivers/power/regulator/axp_regulator.c new file mode 100644 index 0000000000..02f320eac1 --- /dev/null +++ b/drivers/power/regulator/axp_regulator.c @@ -0,0 +1,312 @@ +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause +/* + * Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved. + * Copyright (c) 2018-2023 Samuel Holland samuel@sholland.org + */ + +#include <axp_pmic.h> +#include <dm.h> +#include <errno.h> +#include <dm/device-internal.h> +#include <power/pmic.h> +#include <power/regulator.h> + +#define NA 0xff + +struct axp_regulator_plat { + const char *name; + u8 enable_reg; + u8 enable_mask; + u8 volt_reg; + u8 volt_mask; + u16 min_mV; + u16 max_mV; + u8 step_mV; + u8 split; + const u16 *table; +}; + +static int axp_regulator_get_value(struct udevice *dev) +{ + const struct axp_regulator_plat *plat = dev_get_plat(dev); + int mV, sel; + + if (plat->volt_reg == NA) + return -EINVAL; + + sel = pmic_reg_read(dev->parent, plat->volt_reg); + if (sel < 0) + return sel; + + sel &= plat->volt_mask; + sel >>= ffs(plat->volt_mask) - 1; + + if (plat->table) { + mV = plat->table[sel]; + } else { + if (sel > plat->split) + sel = plat->split + (sel - plat->split) * 2; + mV = plat->min_mV + sel * plat->step_mV; + } + + return mV * 1000; +} + +static int axp_regulator_set_value(struct udevice *dev, int uV) +{ + const struct axp_regulator_plat *plat = dev_get_plat(dev); + int mV = uV / 1000; + uint sel, shift; + + if (plat->volt_reg == NA) + return -EINVAL; + if (mV < plat->min_mV || mV > plat->max_mV) + return -EINVAL; + + shift = ffs(plat->volt_mask) - 1; + + if (plat->table) { + /* + * The table must be monotonically increasing and + * have an entry for each possible field value. + */ + sel = plat->volt_mask >> shift; + while (sel && plat->table[sel] > mV) + sel--; + } else { + sel = (mV - plat->min_mV) / plat->step_mV; + if (sel > plat->split) + sel = plat->split + (sel - plat->split) / 2; + } + + return pmic_clrsetbits(dev->parent, plat->volt_reg, + plat->volt_mask, sel << shift); +} + +static int axp_regulator_get_enable(struct udevice *dev) +{ + const struct axp_regulator_plat *plat = dev_get_plat(dev); + int reg; + + reg = pmic_reg_read(dev->parent, plat->enable_reg); + if (reg < 0) + return reg; + + return (reg & plat->enable_mask) == plat->enable_mask; +} + +static int axp_regulator_set_enable(struct udevice *dev, bool enable) +{ + const struct axp_regulator_plat *plat = dev_get_plat(dev); + + return pmic_clrsetbits(dev->parent, plat->enable_reg, + plat->enable_mask, + enable ? plat->enable_mask : 0); +} + +static const struct dm_regulator_ops axp_regulator_ops = { + .get_value = axp_regulator_get_value, + .set_value = axp_regulator_set_value, + .get_enable = axp_regulator_get_enable, + .set_enable = axp_regulator_set_enable, +}; + +static const u16 axp152_dcdc1_table[] = { + 1700, 1800, 1900, 2000, 2100, 2400, 2500, 2600, + 2700, 2800, 3000, 3100, 3200, 3300, 3400, 3500, +}; + +static const u16 axp152_aldo12_table[] = { + 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, + 2000, 2500, 2700, 2800, 3000, 3100, 3200, 3300, +}; + +static const u16 axp152_ldo0_table[] = { + 5000, 3300, 2800, 2500, +}; + +static const struct axp_regulator_plat axp152_regulators[] = { + { "dcdc1", 0x12, BIT(7), 0x26, 0x0f, .table = axp152_dcdc1_table }, + { "dcdc2", 0x12, BIT(6), 0x23, 0x3f, 700, 2275, 25, NA }, + { "dcdc3", 0x12, BIT(5), 0x27, 0x3f, 700, 3500, 50, NA }, + { "dcdc4", 0x12, BIT(4), 0x2b, 0x7f, 700, 3500, 25, NA }, + { "aldo1", 0x12, BIT(3), 0x28, 0xf0, .table = axp152_aldo12_table }, + { "aldo2", 0x12, BIT(2), 0x28, 0x0f, .table = axp152_aldo12_table }, + { "dldo1", 0x12, BIT(1), 0x29, 0x1f, 700, 3500, 100, NA }, + { "dldo2", 0x12, BIT(0), 0x2a, 0x1f, 700, 3500, 100, NA }, + { "ldo0", 0x15, BIT(7), 0x15, 0x30, .table = axp152_ldo0_table }, + { } +}; + +static const u16 axp20x_ldo4_table[] = { + 1250, 1300, 1400, 1500, 1600, 1700, 1800, 1900, + 2000, 2500, 2700, 2800, 3000, 3100, 3200, 3300, +}; + +static const struct axp_regulator_plat axp20x_regulators[] = { + { "dcdc2", 0x12, BIT(4), 0x23, 0x3f, 700, 2275, 25, NA }, + { "dcdc3", 0x12, BIT(1), 0x27, 0x7f, 700, 3500, 25, NA }, + { "ldo2", 0x12, BIT(2), 0x28, 0xf0, 1800, 3300, 100, NA }, + { "ldo3", 0x12, BIT(6), 0x29, 0x7f, 700, 2275, 25, NA }, + { "ldo4", 0x12, BIT(3), 0x28, 0x0f, .table = axp20x_ldo4_table }, + { } +}; + +static const struct axp_regulator_plat axp22x_regulators[] = { + {"dc5ldo", 0x10, BIT(0), 0x1c, 0x07, 700, 1400, 100, NA }, + { "dcdc1", 0x10, BIT(1), 0x21, 0x1f, 1600, 3400, 100, NA }, + { "dcdc2", 0x10, BIT(2), 0x22, 0x3f, 600, 1540, 20, NA }, + { "dcdc3", 0x10, BIT(3), 0x23, 0x3f, 600, 1860, 20, NA }, + { "dcdc4", 0x10, BIT(4), 0x24, 0x3f, 600, 1540, 20, NA }, + { "dcdc5", 0x10, BIT(5), 0x25, 0x1f, 1000, 2550, 50, NA }, + { "aldo1", 0x10, BIT(6), 0x28, 0x1f, 700, 3300, 100, NA }, + { "aldo2", 0x10, BIT(7), 0x29, 0x1f, 700, 3300, 100, NA }, + { "aldo3", 0x13, BIT(7), 0x2a, 0x1f, 700, 3300, 100, NA }, + { "dldo1", 0x12, BIT(3), 0x15, 0x1f, 700, 3300, 100, NA }, + { "dldo2", 0x12, BIT(4), 0x16, 0x1f, 700, 3300, 100, NA }, + { "dldo3", 0x12, BIT(5), 0x17, 0x1f, 700, 3300, 100, NA }, + { "dldo4", 0x12, BIT(6), 0x18, 0x1f, 700, 3300, 100, NA }, + { "eldo1", 0x12, BIT(0), 0x19, 0x1f, 700, 3300, 100, NA }, + { "eldo2", 0x12, BIT(1), 0x1a, 0x1f, 700, 3300, 100, NA }, + { "eldo3", 0x12, BIT(2), 0x1b, 0x1f, 700, 3300, 100, NA }, + { "dc1sw", 0x12, BIT(7), NA, NA, NA, NA, NA, NA }, + { } +}; + +static const struct axp_regulator_plat axp803_regulators[] = { + { "dcdc1", 0x10, BIT(0), 0x20, 0x1f, 1600, 3400, 100, NA }, + { "dcdc2", 0x10, BIT(1), 0x21, 0x7f, 500, 1300, 10, 70 }, + { "dcdc3", 0x10, BIT(2), 0x22, 0x7f, 500, 1300, 10, 70 }, + { "dcdc4", 0x10, BIT(3), 0x23, 0x7f, 500, 1300, 10, 70 }, + { "dcdc5", 0x10, BIT(4), 0x24, 0x7f, 800, 1840, 10, 32 }, + { "dcdc6", 0x10, BIT(5), 0x25, 0x7f, 600, 1520, 10, 50 }, + { "aldo1", 0x13, BIT(5), 0x28, 0x1f, 700, 3300, 100, NA }, + { "aldo2", 0x13, BIT(6), 0x29, 0x1f, 700, 3300, 100, NA }, + { "aldo3", 0x13, BIT(7), 0x2a, 0x1f, 700, 3300, 100, NA }, + { "dldo1", 0x12, BIT(3), 0x15, 0x1f, 700, 3300, 100, NA }, + { "dldo2", 0x12, BIT(4), 0x16, 0x1f, 700, 4200, 100, 27 }, + { "dldo3", 0x12, BIT(5), 0x17, 0x1f, 700, 3300, 100, NA }, + { "dldo4", 0x12, BIT(6), 0x18, 0x1f, 700, 3300, 100, NA }, + { "eldo1", 0x12, BIT(0), 0x19, 0x1f, 700, 1900, 50, NA }, + { "eldo2", 0x12, BIT(1), 0x1a, 0x1f, 700, 1900, 50, NA }, + { "eldo3", 0x12, BIT(2), 0x1b, 0x1f, 700, 1900, 50, NA }, + { "fldo1", 0x13, BIT(2), 0x1c, 0x0f, 700, 1450, 50, NA }, + { "fldo2", 0x13, BIT(3), 0x1d, 0x0f, 700, 1450, 50, NA }, + { "dc1sw", 0x12, BIT(7), NA, NA, NA, NA, NA, NA }, + { } +}; + +/* + * The "dcdcd" split changes the step size by a factor of 5, not 2; + * disallow values above the split to maintain accuracy. + */ +static const struct axp_regulator_plat axp806_regulators[] = { + { "dcdca", 0x10, BIT(0), 0x12, 0x7f, 600, 1520, 10, 50 }, + { "dcdcb", 0x10, BIT(1), 0x13, 0x1f, 1000, 2550, 50, NA }, + { "dcdcc", 0x10, BIT(2), 0x14, 0x7f, 600, 1520, 10, 50 }, + { "dcdcd", 0x10, BIT(3), 0x15, 0x3f, 600, 1500, 20, NA }, + { "dcdce", 0x10, BIT(4), 0x16, 0x1f, 1100, 3400, 100, NA }, + { "aldo1", 0x10, BIT(5), 0x17, 0x1f, 700, 3300, 100, NA }, + { "aldo2", 0x10, BIT(6), 0x18, 0x1f, 700, 3300, 100, NA }, + { "aldo3", 0x10, BIT(7), 0x19, 0x1f, 700, 3300, 100, NA }, + { "bldo1", 0x11, BIT(0), 0x20, 0x0f, 700, 1900, 100, NA }, + { "bldo2", 0x11, BIT(1), 0x21, 0x0f, 700, 1900, 100, NA }, + { "bldo3", 0x11, BIT(2), 0x22, 0x0f, 700, 1900, 100, NA }, + { "bldo4", 0x11, BIT(3), 0x23, 0x0f, 700, 1900, 100, NA }, + { "cldo1", 0x11, BIT(4), 0x24, 0x1f, 700, 3300, 100, NA }, + { "cldo2", 0x11, BIT(5), 0x25, 0x1f, 700, 4200, 100, 27 }, + { "cldo3", 0x11, BIT(6), 0x26, 0x1f, 700, 3300, 100, NA }, + { "sw", 0x11, BIT(7), NA, NA, NA, NA, NA, NA }, + { } +}; + +/* + * The "dcdc4" split changes the step size by a factor of 5, not 2; + * disallow values above the split to maintain accuracy. + */ +static const struct axp_regulator_plat axp809_regulators[] = { + {"dc5ldo", 0x10, BIT(0), 0x1c, 0x07, 700, 1400, 100, NA }, + { "dcdc1", 0x10, BIT(1), 0x21, 0x1f, 1600, 3400, 100, NA }, + { "dcdc2", 0x10, BIT(2), 0x22, 0x3f, 600, 1540, 20, NA }, + { "dcdc3", 0x10, BIT(3), 0x23, 0x3f, 600, 1860, 20, NA }, + { "dcdc4", 0x10, BIT(4), 0x24, 0x3f, 600, 1540, 20, NA }, + { "dcdc5", 0x10, BIT(5), 0x25, 0x1f, 1000, 2550, 50, NA }, + { "aldo1", 0x10, BIT(6), 0x28, 0x1f, 700, 3300, 100, NA }, + { "aldo2", 0x10, BIT(7), 0x29, 0x1f, 700, 3300, 100, NA }, + { "aldo3", 0x12, BIT(5), 0x2a, 0x1f, 700, 3300, 100, NA }, + { "dldo1", 0x12, BIT(3), 0x15, 0x1f, 700, 3300, 100, NA }, + { "dldo2", 0x12, BIT(4), 0x16, 0x1f, 700, 3300, 100, NA }, + { "eldo1", 0x12, BIT(0), 0x19, 0x1f, 700, 3300, 100, NA }, + { "eldo2", 0x12, BIT(1), 0x1a, 0x1f, 700, 3300, 100, NA }, + { "eldo3", 0x12, BIT(2), 0x1b, 0x1f, 700, 3300, 100, NA }, + { "sw", 0x12, BIT(6), NA, NA, NA, NA, NA, NA }, + { "dc1sw", 0x12, BIT(7), NA, NA, NA, NA, NA, NA }, + { } +}; + +static const struct axp_regulator_plat axp813_regulators[] = { + { "dcdc1", 0x10, BIT(0), 0x20, 0x1f, 1600, 3400, 100, NA }, + { "dcdc2", 0x10, BIT(1), 0x21, 0x7f, 500, 1300, 10, 70 }, + { "dcdc3", 0x10, BIT(2), 0x22, 0x7f, 500, 1300, 10, 70 }, + { "dcdc4", 0x10, BIT(3), 0x23, 0x7f, 500, 1300, 10, 70 }, + { "dcdc5", 0x10, BIT(4), 0x24, 0x7f, 800, 1840, 10, 32 }, + { "dcdc6", 0x10, BIT(5), 0x25, 0x7f, 600, 1520, 10, 50 }, + { "dcdc7", 0x10, BIT(6), 0x26, 0x7f, 600, 1520, 10, 50 }, + { "aldo1", 0x13, BIT(5), 0x28, 0x1f, 700, 3300, 100, NA }, + { "aldo2", 0x13, BIT(6), 0x29, 0x1f, 700, 3300, 100, NA }, + { "aldo3", 0x13, BIT(7), 0x2a, 0x1f, 700, 3300, 100, NA }, + { "dldo1", 0x12, BIT(3), 0x15, 0x1f, 700, 3300, 100, NA }, + { "dldo2", 0x12, BIT(4), 0x16, 0x1f, 700, 4200, 100, 27 }, + { "dldo3", 0x12, BIT(5), 0x17, 0x1f, 700, 3300, 100, NA }, + { "dldo4", 0x12, BIT(6), 0x18, 0x1f, 700, 3300, 100, NA }, + { "eldo1", 0x12, BIT(0), 0x19, 0x1f, 700, 1900, 50, NA }, + { "eldo2", 0x12, BIT(1), 0x1a, 0x1f, 700, 1900, 50, NA }, + { "eldo3", 0x12, BIT(2), 0x1b, 0x1f, 700, 1900, 50, NA }, + { "fldo1", 0x13, BIT(2), 0x1c, 0x0f, 700, 1450, 50, NA }, + { "fldo2", 0x13, BIT(3), 0x1d, 0x0f, 700, 1450, 50, NA }, + { "fldo3", 0x13, BIT(4), NA, NA, NA, NA, NA, NA }, + { } +}; + +static const struct axp_regulator_plat *const axp_regulators[] = { + [AXP152_ID] = axp152_regulators, + [AXP202_ID] = axp20x_regulators, + [AXP209_ID] = axp20x_regulators, + [AXP221_ID] = axp22x_regulators, + [AXP223_ID] = axp22x_regulators, + [AXP803_ID] = axp803_regulators, + [AXP806_ID] = axp806_regulators, + [AXP809_ID] = axp809_regulators, + [AXP813_ID] = axp813_regulators, +}; + +static int axp_regulator_bind(struct udevice *dev) +{ + struct dm_regulator_uclass_plat *uc_plat = dev_get_uclass_plat(dev); + ulong id = dev_get_driver_data(dev->parent); + const struct axp_regulator_plat *plat; + + for (plat = axp_regulators[id]; plat && plat->name; plat++) + if (!strcmp(plat->name, dev->name)) + break; + if (!plat || !plat->name) + return -ENODEV; + + dev_set_plat(dev, (void *)plat); + + if (plat->volt_reg == NA) + uc_plat->type = REGULATOR_TYPE_FIXED; + else if (!strncmp(plat->name, "dcdc", strlen("dcdc"))) + uc_plat->type = REGULATOR_TYPE_BUCK; + else + uc_plat->type = REGULATOR_TYPE_LDO; + + return 0; +} + +U_BOOT_DRIVER(axp_regulator) = { + .name = "axp_regulator", + .id = UCLASS_REGULATOR, + .bind = axp_regulator_bind, + .ops = &axp_regulator_ops, +};