355 lines
6.5 KiB
C
355 lines
6.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2016
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* Texas Instruments Incorporated, <www.ti.com>
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*
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* Keerthy <j-keerthy@ti.com>
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*/
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#include <common.h>
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#include <fdtdec.h>
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#include <errno.h>
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#include <dm.h>
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#include <i2c.h>
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#include <power/pmic.h>
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#include <power/regulator.h>
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#include <power/lp873x.h>
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static const char lp873x_buck_ctrl[LP873X_BUCK_NUM] = {0x2, 0x4};
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static const char lp873x_buck_volt[LP873X_BUCK_NUM] = {0x6, 0x7};
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static const char lp873x_ldo_ctrl[LP873X_LDO_NUM] = {0x8, 0x9};
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static const char lp873x_ldo_volt[LP873X_LDO_NUM] = {0xA, 0xB};
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static int lp873x_buck_enable(struct udevice *dev, int op, bool *enable)
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{
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int ret;
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unsigned int adr;
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struct dm_regulator_uclass_platdata *uc_pdata;
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uc_pdata = dev_get_uclass_platdata(dev);
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adr = uc_pdata->ctrl_reg;
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ret = pmic_reg_read(dev->parent, adr);
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if (ret < 0)
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return ret;
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if (op == PMIC_OP_GET) {
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ret &= LP873X_BUCK_MODE_MASK;
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if (ret)
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*enable = true;
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else
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*enable = false;
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return 0;
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} else if (op == PMIC_OP_SET) {
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if (*enable)
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ret |= LP873X_BUCK_MODE_MASK;
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else
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ret &= ~(LP873X_BUCK_MODE_MASK);
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ret = pmic_reg_write(dev->parent, adr, ret);
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if (ret)
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return ret;
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}
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return 0;
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}
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static int lp873x_buck_volt2hex(int uV)
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{
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if (uV > LP873X_BUCK_VOLT_MAX)
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return -EINVAL;
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else if (uV > 1400000)
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return (uV - 1420000) / 20000 + 0x9E;
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else if (uV > 730000)
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return (uV - 735000) / 5000 + 0x18;
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else if (uV >= 700000)
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return (uV - 700000) / 10000 + 0x1;
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else
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return -EINVAL;
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}
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static int lp873x_buck_hex2volt(int hex)
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{
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if (hex > LP873X_BUCK_VOLT_MAX_HEX)
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return -EINVAL;
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else if (hex > 0x9D)
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return 1400000 + (hex - 0x9D) * 20000;
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else if (hex > 0x17)
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return 730000 + (hex - 0x17) * 5000;
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else if (hex >= 0x14)
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return 700000 + (hex - 0x14) * 10000;
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else
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return -EINVAL;
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}
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static int lp873x_buck_val(struct udevice *dev, int op, int *uV)
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{
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unsigned int hex, adr;
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int ret;
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struct dm_regulator_uclass_platdata *uc_pdata;
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uc_pdata = dev_get_uclass_platdata(dev);
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if (op == PMIC_OP_GET)
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*uV = 0;
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adr = uc_pdata->volt_reg;
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ret = pmic_reg_read(dev->parent, adr);
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if (ret < 0)
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return ret;
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if (op == PMIC_OP_GET) {
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ret &= LP873X_BUCK_VOLT_MASK;
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ret = lp873x_buck_hex2volt(ret);
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if (ret < 0)
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return ret;
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*uV = ret;
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return 0;
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}
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hex = lp873x_buck_volt2hex(*uV);
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if (hex < 0)
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return hex;
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ret &= 0x0;
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ret |= hex;
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ret = pmic_reg_write(dev->parent, adr, ret);
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return ret;
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}
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static int lp873x_ldo_enable(struct udevice *dev, int op, bool *enable)
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{
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int ret;
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unsigned int adr;
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struct dm_regulator_uclass_platdata *uc_pdata;
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uc_pdata = dev_get_uclass_platdata(dev);
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adr = uc_pdata->ctrl_reg;
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ret = pmic_reg_read(dev->parent, adr);
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if (ret < 0)
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return ret;
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if (op == PMIC_OP_GET) {
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ret &= LP873X_LDO_MODE_MASK;
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if (ret)
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*enable = true;
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else
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*enable = false;
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return 0;
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} else if (op == PMIC_OP_SET) {
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if (*enable)
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ret |= LP873X_LDO_MODE_MASK;
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else
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ret &= ~(LP873X_LDO_MODE_MASK);
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ret = pmic_reg_write(dev->parent, adr, ret);
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if (ret)
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return ret;
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}
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return 0;
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}
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static int lp873x_ldo_volt2hex(int uV)
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{
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if (uV > LP873X_LDO_VOLT_MAX)
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return -EINVAL;
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return (uV - 800000) / 100000;
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}
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static int lp873x_ldo_hex2volt(int hex)
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{
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if (hex > LP873X_LDO_VOLT_MAX_HEX)
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return -EINVAL;
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if (!hex)
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return 0;
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return (hex * 100000) + 800000;
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}
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static int lp873x_ldo_val(struct udevice *dev, int op, int *uV)
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{
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unsigned int hex, adr;
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int ret;
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struct dm_regulator_uclass_platdata *uc_pdata;
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if (op == PMIC_OP_GET)
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*uV = 0;
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uc_pdata = dev_get_uclass_platdata(dev);
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adr = uc_pdata->volt_reg;
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ret = pmic_reg_read(dev->parent, adr);
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if (ret < 0)
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return ret;
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if (op == PMIC_OP_GET) {
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ret &= LP873X_LDO_VOLT_MASK;
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ret = lp873x_ldo_hex2volt(ret);
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if (ret < 0)
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return ret;
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*uV = ret;
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return 0;
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}
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hex = lp873x_ldo_volt2hex(*uV);
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if (hex < 0)
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return hex;
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ret &= ~LP873X_LDO_VOLT_MASK;
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ret |= hex;
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if (*uV > 1650000)
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ret |= 0x80;
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ret = pmic_reg_write(dev->parent, adr, ret);
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return ret;
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}
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static int lp873x_ldo_probe(struct udevice *dev)
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{
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struct dm_regulator_uclass_platdata *uc_pdata;
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uc_pdata = dev_get_uclass_platdata(dev);
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uc_pdata->type = REGULATOR_TYPE_LDO;
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int idx = dev->driver_data;
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if (idx >= LP873X_LDO_NUM) {
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printf("Wrong ID for regulator\n");
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return -1;
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}
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uc_pdata->ctrl_reg = lp873x_ldo_ctrl[idx];
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uc_pdata->volt_reg = lp873x_ldo_volt[idx];
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return 0;
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}
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static int ldo_get_value(struct udevice *dev)
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{
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int uV;
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int ret;
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ret = lp873x_ldo_val(dev, PMIC_OP_GET, &uV);
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if (ret)
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return ret;
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return uV;
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}
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static int ldo_set_value(struct udevice *dev, int uV)
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{
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return lp873x_ldo_val(dev, PMIC_OP_SET, &uV);
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}
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static int ldo_get_enable(struct udevice *dev)
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{
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bool enable = false;
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int ret;
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ret = lp873x_ldo_enable(dev, PMIC_OP_GET, &enable);
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if (ret)
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return ret;
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return enable;
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}
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static int ldo_set_enable(struct udevice *dev, bool enable)
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{
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return lp873x_ldo_enable(dev, PMIC_OP_SET, &enable);
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}
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static int lp873x_buck_probe(struct udevice *dev)
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{
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struct dm_regulator_uclass_platdata *uc_pdata;
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int idx;
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uc_pdata = dev_get_uclass_platdata(dev);
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uc_pdata->type = REGULATOR_TYPE_BUCK;
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idx = dev->driver_data;
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if (idx >= LP873X_BUCK_NUM) {
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printf("Wrong ID for regulator\n");
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return -1;
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}
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uc_pdata->ctrl_reg = lp873x_buck_ctrl[idx];
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uc_pdata->volt_reg = lp873x_buck_volt[idx];
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return 0;
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}
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static int buck_get_value(struct udevice *dev)
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{
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int uV;
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int ret;
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ret = lp873x_buck_val(dev, PMIC_OP_GET, &uV);
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if (ret)
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return ret;
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return uV;
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}
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static int buck_set_value(struct udevice *dev, int uV)
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{
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return lp873x_buck_val(dev, PMIC_OP_SET, &uV);
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}
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static int buck_get_enable(struct udevice *dev)
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{
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bool enable = false;
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int ret;
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ret = lp873x_buck_enable(dev, PMIC_OP_GET, &enable);
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if (ret)
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return ret;
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return enable;
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}
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static int buck_set_enable(struct udevice *dev, bool enable)
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{
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return lp873x_buck_enable(dev, PMIC_OP_SET, &enable);
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}
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static const struct dm_regulator_ops lp873x_ldo_ops = {
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.get_value = ldo_get_value,
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.set_value = ldo_set_value,
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.get_enable = ldo_get_enable,
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.set_enable = ldo_set_enable,
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};
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U_BOOT_DRIVER(lp873x_ldo) = {
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.name = LP873X_LDO_DRIVER,
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.id = UCLASS_REGULATOR,
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.ops = &lp873x_ldo_ops,
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.probe = lp873x_ldo_probe,
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};
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static const struct dm_regulator_ops lp873x_buck_ops = {
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.get_value = buck_get_value,
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.set_value = buck_set_value,
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.get_enable = buck_get_enable,
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.set_enable = buck_set_enable,
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};
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U_BOOT_DRIVER(lp873x_buck) = {
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.name = LP873X_BUCK_DRIVER,
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.id = UCLASS_REGULATOR,
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.ops = &lp873x_buck_ops,
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.probe = lp873x_buck_probe,
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};
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