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https://github.com/AsahiLinux/u-boot
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d024236e5a
We have a large number of places where while we historically referenced gd in the code we no longer do, as well as cases where the code added that line "just in case" during development and never dropped it. Signed-off-by: Tom Rini <trini@konsulko.com>
355 lines
6.5 KiB
C
355 lines
6.5 KiB
C
/*
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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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* SPDX-License-Identifier: GPL-2.0+
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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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