| // 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_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 &= 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_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; |
| |
| 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_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 &= 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_platdata *uc_pdata; |
| |
| if (op == PMIC_OP_GET) |
| *uV = 0; |
| |
| uc_pdata = dev_get_uclass_platdata(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_platdata *uc_pdata; |
| |
| uc_pdata = dev_get_uclass_platdata(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_platdata *uc_pdata; |
| int idx; |
| |
| uc_pdata = dev_get_uclass_platdata(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, |
| }; |
