123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181 |
- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (C) 2023 Starfive, Inc.
- * Author: keith.zhao<keith.zhao@statfivetech.com>
- */
- #include <common.h>
- #include <fdtdec.h>
- #include <errno.h>
- #include <dm.h>
- #include <i2c.h>
- #include <power/pmic.h>
- #include <power/regulator.h>
- #include <power/lp873x.h>
- static const char lp873x_ldo_ctrl[LP873X_LDO_NUM] = {0x8, 0x9};
- static const char lp873x_ldo_volt[LP873X_LDO_NUM] = {0xA, 0xB};
- static int lp873x_ldo_enable(struct udevice *dev, int op, bool *enable)
- {
- int ret;
- unsigned int adr;
- struct dm_regulator_uclass_plat *uc_pdata;
- uc_pdata = dev_get_uclass_plat(dev);
- adr = uc_pdata->ctrl_reg;
- ret = pmic_reg_read(dev->parent, adr);
- if (ret < 0)
- return ret;
- if (op == PMIC_OP_GET) {
- ret &= LP873X_LDO_MODE_MASK;
- if (ret)
- *enable = true;
- else
- *enable = false;
- return 0;
- } else if (op == PMIC_OP_SET) {
- if (*enable)
- ret |= LP873X_LDO_MODE_MASK;
- else
- ret &= ~(LP873X_LDO_MODE_MASK);
- ret = pmic_reg_write(dev->parent, adr, ret);
- if (ret)
- return ret;
- }
- return 0;
- }
- static int lp873x_ldo_volt2hex(int uV)
- {
- if (uV > LP873X_LDO_VOLT_MAX)
- return -EINVAL;
- return (uV - 800000) / 100000;
- }
- static int lp873x_ldo_hex2volt(int hex)
- {
- if (hex > LP873X_LDO_VOLT_MAX_HEX)
- return -EINVAL;
- if (!hex)
- return 0;
- return (hex * 100000) + 800000;
- }
- static int lp873x_ldo_val(struct udevice *dev, int op, int *uV)
- {
- unsigned int hex, adr;
- int ret;
- struct dm_regulator_uclass_plat *uc_pdata;
- if (op == PMIC_OP_GET)
- *uV = 0;
- uc_pdata = dev_get_uclass_plat(dev);
- adr = uc_pdata->volt_reg;
- ret = pmic_reg_read(dev->parent, adr);
- if (ret < 0)
- return ret;
- if (op == PMIC_OP_GET) {
- ret &= LP873X_LDO_VOLT_MASK;
- ret = lp873x_ldo_hex2volt(ret);
- if (ret < 0)
- return ret;
- *uV = ret;
- return 0;
- }
- hex = lp873x_ldo_volt2hex(*uV);
- if (hex < 0)
- return hex;
- ret &= ~LP873X_LDO_VOLT_MASK;
- ret |= hex;
- if (*uV > 1650000)
- ret |= 0x80;
- ret = pmic_reg_write(dev->parent, adr, ret);
- return ret;
- }
- static int lp873x_ldo_probe(struct udevice *dev)
- {
- struct dm_regulator_uclass_plat *uc_pdata;
- uc_pdata = dev_get_uclass_plat(dev);
- uc_pdata->type = REGULATOR_TYPE_LDO;
- int idx = dev->driver_data;
- if (idx >= LP873X_LDO_NUM) {
- return -1;
- }
- uc_pdata->ctrl_reg = lp873x_ldo_ctrl[idx];
- uc_pdata->volt_reg = lp873x_ldo_volt[idx];
- return 0;
- }
- static int ldo_get_value(struct udevice *dev)
- {
- int uV;
- int ret;
- ret = lp873x_ldo_val(dev, PMIC_OP_GET, &uV);
- if (ret)
- return ret;
- return uV;
- }
- static int ldo_set_value(struct udevice *dev, int uV)
- {
- return lp873x_ldo_val(dev, PMIC_OP_SET, &uV);
- }
- static int ldo_get_enable(struct udevice *dev)
- {
- bool enable = false;
- int ret;
- ret = lp873x_ldo_enable(dev, PMIC_OP_GET, &enable);
- if (ret)
- return ret;
- return enable;
- }
- static int ldo_set_enable(struct udevice *dev, bool enable)
- {
- return lp873x_ldo_enable(dev, PMIC_OP_SET, &enable);
- }
- static const struct dm_regulator_ops lp873x_ldo_ops = {
- .get_value = ldo_get_value,
- .set_value = ldo_set_value,
- .get_enable = ldo_get_enable,
- .set_enable = ldo_set_enable,
- };
- U_BOOT_DRIVER(lp873x_ldo) = {
- .name = LP873X_LDO_DRIVER,
- .id = UCLASS_REGULATOR,
- .ops = &lp873x_ldo_ops,
- .probe = lp873x_ldo_probe,
- };
|