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https://github.com/brain-hackers/u-boot-brain
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198 lines
3.8 KiB
C
198 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2017
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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 <log.h>
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#include <power/pmic.h>
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#include <power/regulator.h>
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#include <power/lp87565.h>
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static const char lp87565_buck_ctrl1[LP87565_BUCK_NUM] = {0x2, 0x4, 0x6, 0x8, 0x2, 0x6};
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static const char lp87565_buck_vout[LP87565_BUCK_NUM] = {0xA, 0xC, 0xE, 0x10, 0xA, 0xE };
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static int lp87565_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 &= LP87565_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 |= LP87565_BUCK_MODE_MASK;
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else
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ret &= ~LP87565_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 lp87565_buck_volt2val(int uV)
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{
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if (uV > LP87565_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 >= 500000)
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return (uV - 500000) / 10000;
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else
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return -EINVAL;
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}
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static int lp87565_buck_val2volt(int val)
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{
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if (val > LP87565_BUCK_VOLT_MAX_HEX)
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return -EINVAL;
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else if (val > 0x9D)
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return 1400000 + (val - 0x9D) * 20000;
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else if (val > 0x17)
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return 730000 + (val - 0x17) * 5000;
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else if (val >= 0x0)
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return 500000 + val * 10000;
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else
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return -EINVAL;
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}
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static int lp87565_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 &= LP87565_BUCK_VOLT_MASK;
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ret = lp87565_buck_val2volt(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 = lp87565_buck_volt2val(*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 lp87565_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 == 0 || idx == 1 || idx == 2 || idx == 3) {
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debug("Single phase regulator\n");
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} else if (idx == 23) {
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idx = 5;
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} else if (idx == 10) {
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idx = 4;
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} else {
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printf("Wrong ID for regulator\n");
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return -EINVAL;
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}
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uc_pdata->ctrl_reg = lp87565_buck_ctrl1[idx];
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uc_pdata->volt_reg = lp87565_buck_vout[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 = lp87565_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 lp87565_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 = lp87565_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 lp87565_buck_enable(dev, PMIC_OP_SET, &enable);
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}
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static const struct dm_regulator_ops lp87565_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(lp87565_buck) = {
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.name = LP87565_BUCK_DRIVER,
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.id = UCLASS_REGULATOR,
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.ops = &lp87565_buck_ops,
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.probe = lp87565_buck_probe,
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};
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