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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * (C) Copyright 2019
- * 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 <log.h>
- #include <linux/delay.h>
- #include <power/pmic.h>
- #include <power/regulator.h>
- #include <power/tps65941.h>
- static const char tps65941_buck_ctrl[TPS65941_BUCK_NUM] = {0x4, 0x6, 0x8, 0xA,
- 0xC};
- static const char tps65941_buck_vout[TPS65941_BUCK_NUM] = {0xE, 0x10, 0x12,
- 0x14, 0x16};
- static const char tps65941_ldo_ctrl[TPS65941_BUCK_NUM] = {0x1D, 0x1E, 0x1F,
- 0x20};
- static const char tps65941_ldo_vout[TPS65941_BUCK_NUM] = {0x23, 0x24, 0x25,
- 0x26};
- static int tps65941_buck_enable(struct udevice *dev, int op, bool *enable)
- {
- int ret;
- unsigned int adr;
- struct dm_regulator_uclass_platdata *uc_pdata;
- uc_pdata = dev_get_uclass_platdata(dev);
- adr = uc_pdata->ctrl_reg;
- ret = pmic_reg_read(dev->parent, adr);
- if (ret < 0)
- return ret;
- if (op == PMIC_OP_GET) {
- ret &= TPS65941_BUCK_MODE_MASK;
- if (ret)
- *enable = true;
- else
- *enable = false;
- return 0;
- } else if (op == PMIC_OP_SET) {
- if (*enable)
- ret |= TPS65941_BUCK_MODE_MASK;
- else
- ret &= ~TPS65941_BUCK_MODE_MASK;
- ret = pmic_reg_write(dev->parent, adr, ret);
- if (ret)
- return ret;
- }
- return 0;
- }
- static int tps65941_buck_volt2val(int uV)
- {
- if (uV > TPS65941_BUCK_VOLT_MAX)
- return -EINVAL;
- else if (uV > 1650000)
- return (uV - 1660000) / 20000 + 0xAB;
- else if (uV > 1110000)
- return (uV - 1110000) / 10000 + 0x73;
- else if (uV > 600000)
- return (uV - 600000) / 5000 + 0x0F;
- else if (uV >= 300000)
- return (uV - 300000) / 20000 + 0x00;
- else
- return -EINVAL;
- }
- static int tps65941_buck_val2volt(int val)
- {
- if (val > TPS65941_BUCK_VOLT_MAX_HEX)
- return -EINVAL;
- else if (val > 0xAB)
- return 1660000 + (val - 0xAB) * 20000;
- else if (val > 0x73)
- return 1100000 + (val - 0x73) * 10000;
- else if (val > 0xF)
- return 600000 + (val - 0xF) * 5000;
- else if (val >= 0x0)
- return 300000 + val * 5000;
- else
- return -EINVAL;
- }
- int tps65941_lookup_slew(int id)
- {
- switch (id) {
- case 0:
- return 33000;
- case 1:
- return 20000;
- case 2:
- return 10000;
- case 3:
- return 5000;
- case 4:
- return 2500;
- case 5:
- return 1300;
- case 6:
- return 630;
- case 7:
- return 310;
- default:
- return -1;
- }
- }
- static int tps65941_buck_val(struct udevice *dev, int op, int *uV)
- {
- unsigned int hex, adr;
- int ret, delta, uwait, slew;
- struct dm_regulator_uclass_platdata *uc_pdata;
- uc_pdata = dev_get_uclass_platdata(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;
- ret &= TPS65941_BUCK_VOLT_MASK;
- ret = tps65941_buck_val2volt(ret);
- if (ret < 0)
- return ret;
- if (op == PMIC_OP_GET) {
- *uV = ret;
- return 0;
- }
- /*
- * Compute the delta voltage, find the slew rate and wait
- * for the appropriate amount of time after voltage switch
- */
- if (*uV > ret)
- delta = *uV - ret;
- else
- delta = ret - *uV;
- slew = pmic_reg_read(dev->parent, uc_pdata->ctrl_reg + 1);
- if (slew < 0)
- return ret;
- slew &= TP65941_BUCK_CONF_SLEW_MASK;
- slew = tps65941_lookup_slew(slew);
- if (slew <= 0)
- return ret;
- uwait = delta / slew;
- hex = tps65941_buck_volt2val(*uV);
- if (hex < 0)
- return hex;
- ret &= 0x0;
- ret = hex;
- ret = pmic_reg_write(dev->parent, adr, ret);
- udelay(uwait);
- return ret;
- }
- static int tps65941_ldo_enable(struct udevice *dev, int op, bool *enable)
- {
- int ret;
- unsigned int adr;
- struct dm_regulator_uclass_platdata *uc_pdata;
- uc_pdata = dev_get_uclass_platdata(dev);
- adr = uc_pdata->ctrl_reg;
- ret = pmic_reg_read(dev->parent, adr);
- if (ret < 0)
- return ret;
- if (op == PMIC_OP_GET) {
- ret &= TPS65941_LDO_MODE_MASK;
- if (ret)
- *enable = true;
- else
- *enable = false;
- return 0;
- } else if (op == PMIC_OP_SET) {
- if (*enable)
- ret |= TPS65941_LDO_MODE_MASK;
- else
- ret &= ~TPS65941_LDO_MODE_MASK;
- ret = pmic_reg_write(dev->parent, adr, ret);
- if (ret)
- return ret;
- }
- return 0;
- }
- static int tps65941_ldo_val2volt(int val)
- {
- if (val > TPS65941_LDO_VOLT_MAX_HEX || val < TPS65941_LDO_VOLT_MIN_HEX)
- return -EINVAL;
- else if (val >= TPS65941_LDO_VOLT_MIN_HEX)
- return 600000 + (val - TPS65941_LDO_VOLT_MIN_HEX) * 50000;
- else
- return -EINVAL;
- }
- static int tps65941_ldo_val(struct udevice *dev, int op, int *uV)
- {
- unsigned int hex, adr;
- int ret;
- struct dm_regulator_uclass_platdata *uc_pdata;
- uc_pdata = dev_get_uclass_platdata(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;
- ret &= TPS65941_LDO_VOLT_MASK;
- ret = tps65941_ldo_val2volt(ret);
- if (ret < 0)
- return ret;
- if (op == PMIC_OP_GET) {
- *uV = ret;
- return 0;
- }
- hex = tps65941_buck_volt2val(*uV);
- if (hex < 0)
- return hex;
- ret &= 0x0;
- ret = hex;
- ret = pmic_reg_write(dev->parent, adr, ret);
- return ret;
- }
- static int tps65941_ldo_probe(struct udevice *dev)
- {
- struct dm_regulator_uclass_platdata *uc_pdata;
- int idx;
- uc_pdata = dev_get_uclass_platdata(dev);
- uc_pdata->type = REGULATOR_TYPE_LDO;
- idx = dev->driver_data;
- if (idx == 1 || idx == 2 || idx == 3 || idx == 4) {
- debug("Single phase regulator\n");
- } else {
- printf("Wrong ID for regulator\n");
- return -EINVAL;
- }
- uc_pdata->ctrl_reg = tps65941_ldo_ctrl[idx - 1];
- uc_pdata->volt_reg = tps65941_ldo_vout[idx - 1];
- return 0;
- }
- static int tps65941_buck_probe(struct udevice *dev)
- {
- struct dm_regulator_uclass_platdata *uc_pdata;
- int idx;
- uc_pdata = dev_get_uclass_platdata(dev);
- uc_pdata->type = REGULATOR_TYPE_BUCK;
- idx = dev->driver_data;
- if (idx == 1 || idx == 2 || idx == 3 || idx == 4 || idx == 5) {
- debug("Single phase regulator\n");
- } else if (idx == 12) {
- idx = 1;
- } else if (idx == 34) {
- idx = 3;
- } else if (idx == 1234) {
- idx = 1;
- } else {
- printf("Wrong ID for regulator\n");
- return -EINVAL;
- }
- uc_pdata->ctrl_reg = tps65941_buck_ctrl[idx - 1];
- uc_pdata->volt_reg = tps65941_buck_vout[idx - 1];
- return 0;
- }
- static int ldo_get_value(struct udevice *dev)
- {
- int uV;
- int ret;
- ret = tps65941_ldo_val(dev, PMIC_OP_GET, &uV);
- if (ret)
- return ret;
- return uV;
- }
- static int ldo_set_value(struct udevice *dev, int uV)
- {
- return tps65941_ldo_val(dev, PMIC_OP_SET, &uV);
- }
- static int ldo_get_enable(struct udevice *dev)
- {
- bool enable = false;
- int ret;
- ret = tps65941_ldo_enable(dev, PMIC_OP_GET, &enable);
- if (ret)
- return ret;
- return enable;
- }
- static int ldo_set_enable(struct udevice *dev, bool enable)
- {
- return tps65941_ldo_enable(dev, PMIC_OP_SET, &enable);
- }
- static int buck_get_value(struct udevice *dev)
- {
- int uV;
- int ret;
- ret = tps65941_buck_val(dev, PMIC_OP_GET, &uV);
- if (ret)
- return ret;
- return uV;
- }
- static int buck_set_value(struct udevice *dev, int uV)
- {
- return tps65941_buck_val(dev, PMIC_OP_SET, &uV);
- }
- static int buck_get_enable(struct udevice *dev)
- {
- bool enable = false;
- int ret;
- ret = tps65941_buck_enable(dev, PMIC_OP_GET, &enable);
- if (ret)
- return ret;
- return enable;
- }
- static int buck_set_enable(struct udevice *dev, bool enable)
- {
- return tps65941_buck_enable(dev, PMIC_OP_SET, &enable);
- }
- static const struct dm_regulator_ops tps65941_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(tps65941_ldo) = {
- .name = TPS65941_LDO_DRIVER,
- .id = UCLASS_REGULATOR,
- .ops = &tps65941_ldo_ops,
- .probe = tps65941_ldo_probe,
- };
- static const struct dm_regulator_ops tps65941_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(tps65941_buck) = {
- .name = TPS65941_BUCK_DRIVER,
- .id = UCLASS_REGULATOR,
- .ops = &tps65941_buck_ops,
- .probe = tps65941_buck_probe,
- };
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