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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * (C) Copyright 2016
- * Texas Instruments Incorporated, <www.ti.com>
- *
- * Keerthy <j-keerthy@ti.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_buck_ctrl[LP873X_BUCK_NUM] = {0x2, 0x4};
- static const char lp873x_buck_volt[LP873X_BUCK_NUM] = {0x6, 0x7};
- 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_buck_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_BUCK_MODE_MASK;
- if (ret)
- *enable = true;
- else
- *enable = false;
- return 0;
- } else if (op == PMIC_OP_SET) {
- if (*enable)
- ret |= LP873X_BUCK_MODE_MASK;
- else
- ret &= ~(LP873X_BUCK_MODE_MASK);
- ret = pmic_reg_write(dev->parent, adr, ret);
- if (ret)
- return ret;
- }
- return 0;
- }
- static int lp873x_buck_volt2hex(int uV)
- {
- if (uV > LP873X_BUCK_VOLT_MAX)
- return -EINVAL;
- else if (uV > 1400000)
- return (uV - 1420000) / 20000 + 0x9E;
- else if (uV > 730000)
- return (uV - 735000) / 5000 + 0x18;
- else if (uV >= 700000)
- return (uV - 700000) / 10000 + 0x1;
- else
- return -EINVAL;
- }
- static int lp873x_buck_hex2volt(int hex)
- {
- if (hex > LP873X_BUCK_VOLT_MAX_HEX)
- return -EINVAL;
- else if (hex > 0x9D)
- return 1400000 + (hex - 0x9D) * 20000;
- else if (hex > 0x17)
- return 730000 + (hex - 0x17) * 5000;
- else if (hex >= 0x14)
- return 700000 + (hex - 0x14) * 10000;
- else
- return -EINVAL;
- }
- static int lp873x_buck_val(struct udevice *dev, int op, int *uV)
- {
- unsigned int hex, adr;
- int ret;
- struct dm_regulator_uclass_plat *uc_pdata;
- uc_pdata = dev_get_uclass_plat(dev);
- if (op == PMIC_OP_GET)
- *uV = 0;
- adr = uc_pdata->volt_reg;
- ret = pmic_reg_read(dev->parent, adr);
- if (ret < 0)
- return ret;
- if (op == PMIC_OP_GET) {
- ret &= LP873X_BUCK_VOLT_MASK;
- ret = lp873x_buck_hex2volt(ret);
- if (ret < 0)
- return ret;
- *uV = ret;
- return 0;
- }
- hex = lp873x_buck_volt2hex(*uV);
- if (hex < 0)
- return hex;
- ret &= 0x0;
- ret |= hex;
- ret = pmic_reg_write(dev->parent, adr, ret);
- return ret;
- }
- 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) {
- printf("Wrong ID for regulator\n");
- 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 int lp873x_buck_probe(struct udevice *dev)
- {
- struct dm_regulator_uclass_plat *uc_pdata;
- int idx;
- uc_pdata = dev_get_uclass_plat(dev);
- uc_pdata->type = REGULATOR_TYPE_BUCK;
- idx = dev->driver_data;
- if (idx >= LP873X_BUCK_NUM) {
- printf("Wrong ID for regulator\n");
- return -1;
- }
- uc_pdata->ctrl_reg = lp873x_buck_ctrl[idx];
- uc_pdata->volt_reg = lp873x_buck_volt[idx];
- return 0;
- }
- static int buck_get_value(struct udevice *dev)
- {
- int uV;
- int ret;
- ret = lp873x_buck_val(dev, PMIC_OP_GET, &uV);
- if (ret)
- return ret;
- return uV;
- }
- static int buck_set_value(struct udevice *dev, int uV)
- {
- return lp873x_buck_val(dev, PMIC_OP_SET, &uV);
- }
- static int buck_get_enable(struct udevice *dev)
- {
- bool enable = false;
- int ret;
- ret = lp873x_buck_enable(dev, PMIC_OP_GET, &enable);
- if (ret)
- return ret;
- return enable;
- }
- static int buck_set_enable(struct udevice *dev, bool enable)
- {
- return lp873x_buck_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,
- };
- static const struct dm_regulator_ops lp873x_buck_ops = {
- .get_value = buck_get_value,
- .set_value = buck_set_value,
- .get_enable = buck_get_enable,
- .set_enable = buck_set_enable,
- };
- U_BOOT_DRIVER(lp873x_buck) = {
- .name = LP873X_BUCK_DRIVER,
- .id = UCLASS_REGULATOR,
- .ops = &lp873x_buck_ops,
- .probe = lp873x_buck_probe,
- };
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