diff options
Diffstat (limited to 'drivers/regulator/spacemit-p1.c')
| -rw-r--r-- | drivers/regulator/spacemit-p1.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/drivers/regulator/spacemit-p1.c b/drivers/regulator/spacemit-p1.c new file mode 100644 index 000000000000..d437e6738ea1 --- /dev/null +++ b/drivers/regulator/spacemit-p1.c @@ -0,0 +1,157 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Driver for regulators found in the SpacemiT P1 PMIC + * + * Copyright (C) 2025 by RISCstar Solutions Corporation. All rights reserved. + * Derived from code from SpacemiT. + * Copyright (c) 2023, SPACEMIT Co., Ltd + */ + +#include <linux/array_size.h> +#include <linux/bits.h> +#include <linux/device.h> +#include <linux/linear_range.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/regulator/driver.h> + +#define MOD_NAME "spacemit-p1-regulator" + +enum p1_regulator_id { + P1_BUCK1, + P1_BUCK2, + P1_BUCK3, + P1_BUCK4, + P1_BUCK5, + P1_BUCK6, + + P1_ALDO1, + P1_ALDO2, + P1_ALDO3, + P1_ALDO4, + + P1_DLDO1, + P1_DLDO2, + P1_DLDO3, + P1_DLDO4, + P1_DLDO5, + P1_DLDO6, + P1_DLDO7, +}; + +static const struct regulator_ops p1_regulator_ops = { + .list_voltage = regulator_list_voltage_linear_range, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_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, +}; + +/* Selector value 255 can be used to disable the buck converter on sleep */ +static const struct linear_range p1_buck_ranges[] = { + REGULATOR_LINEAR_RANGE(500000, 0, 170, 5000), + REGULATOR_LINEAR_RANGE(1375000, 171, 254, 25000), +}; + +/* Selector value 0 can be used for suspend */ +static const struct linear_range p1_ldo_ranges[] = { + REGULATOR_LINEAR_RANGE(500000, 11, 127, 25000), +}; + +/* These define the voltage selector field for buck and LDO regulators */ +#define BUCK_MASK GENMASK(7, 0) +#define LDO_MASK GENMASK(6, 0) + +#define P1_ID(_TYPE, _n) P1_ ## _TYPE ## _n +#define P1_ENABLE_REG(_off, _n) ((_off) + 3 * ((_n) - 1)) + +#define P1_REG_DESC(_TYPE, _type, _n, _s, _off, _mask, _nv, _ranges) \ + { \ + .name = #_type #_n, \ + .supply_name = _s, \ + .of_match = of_match_ptr(#_type #_n), \ + .regulators_node = of_match_ptr("regulators"), \ + .id = P1_ID(_TYPE, _n), \ + .n_voltages = _nv, \ + .ops = &p1_regulator_ops, \ + .owner = THIS_MODULE, \ + .linear_ranges = _ranges, \ + .n_linear_ranges = ARRAY_SIZE(_ranges), \ + .vsel_reg = P1_ENABLE_REG(_off, _n) + 1, \ + .vsel_mask = _mask, \ + .enable_reg = P1_ENABLE_REG(_off, _n), \ + .enable_mask = BIT(0), \ + } + +#define P1_BUCK_DESC(_n) \ + P1_REG_DESC(BUCK, buck, _n, "vcc", 0x47, BUCK_MASK, 254, p1_buck_ranges) + +#define P1_ALDO_DESC(_n) \ + P1_REG_DESC(ALDO, aldo, _n, "vcc", 0x5b, LDO_MASK, 117, p1_ldo_ranges) + +#define P1_DLDO_DESC(_n) \ + P1_REG_DESC(DLDO, dldo, _n, "buck5", 0x67, LDO_MASK, 117, p1_ldo_ranges) + +static const struct regulator_desc p1_regulator_desc[] = { + P1_BUCK_DESC(1), + P1_BUCK_DESC(2), + P1_BUCK_DESC(3), + P1_BUCK_DESC(4), + P1_BUCK_DESC(5), + P1_BUCK_DESC(6), + + P1_ALDO_DESC(1), + P1_ALDO_DESC(2), + P1_ALDO_DESC(3), + P1_ALDO_DESC(4), + + P1_DLDO_DESC(1), + P1_DLDO_DESC(2), + P1_DLDO_DESC(3), + P1_DLDO_DESC(4), + P1_DLDO_DESC(5), + P1_DLDO_DESC(6), + P1_DLDO_DESC(7), +}; + +static int p1_regulator_probe(struct platform_device *pdev) +{ + struct regulator_config config = { }; + struct device *dev = &pdev->dev; + u32 i; + + /* + * The parent device (PMIC) owns the regmap. Since we don't + * provide one in the config structure, that one will be used. + */ + config.dev = dev->parent; + + for (i = 0; i < ARRAY_SIZE(p1_regulator_desc); i++) { + const struct regulator_desc *desc = &p1_regulator_desc[i]; + struct regulator_dev *rdev; + + rdev = devm_regulator_register(dev, desc, &config); + if (IS_ERR(rdev)) + return dev_err_probe(dev, PTR_ERR(rdev), + "error registering regulator %s\n", + desc->name); + } + + return 0; +} + +static struct platform_driver p1_regulator_driver = { + .probe = p1_regulator_probe, + .driver = { + .name = MOD_NAME, + }, +}; + +module_platform_driver(p1_regulator_driver); + +MODULE_DESCRIPTION("SpacemiT P1 regulator driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" MOD_NAME); |