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cc7595a850
The driver provides regulator set/get voltage enable/disable functions for MAXIM MAX77663 PMICs. Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
376 lines
7.0 KiB
C
376 lines
7.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright(C) 2023 Svyatoslav Ryhel <clamor95@gmail.com>
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*/
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#include <dm.h>
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#include <power/pmic.h>
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#include <power/regulator.h>
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#include <power/max77663.h>
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/* fist row is control registers, second is voltage registers */
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static const char max77663_sd_reg[][MAX77663_SD_NUM] = {
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{ 0x1d, 0x1e, 0x1f, 0x20, 0x21 },
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{ 0x16, 0x17, 0x18, 0x19, 0x2a },
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};
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static const char max77663_ldo_reg[MAX77663_LDO_NUM] = {
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0x23, 0x25, 0x27, 0x29, 0x2b, 0x2d, 0x2f, 0x31, 0x33
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};
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static int max77663_sd_enable(struct udevice *dev, int op, bool *enable)
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{
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struct dm_regulator_uclass_plat *uc_pdata =
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dev_get_uclass_plat(dev);
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u32 adr = uc_pdata->ctrl_reg;
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int val, ret;
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val = pmic_reg_read(dev->parent, adr);
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if (val < 0)
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return val;
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if (op == PMIC_OP_GET) {
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if (val & SD_STATUS_MASK)
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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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val &= ~SD_STATUS_MASK;
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if (*enable)
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val |= SD_STATUS_MASK;
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ret = pmic_reg_write(dev->parent, adr, val);
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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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/**
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* max77663_*_volt2hex() - convert voltage in uV into
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* applicable to register hex value
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*
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* @idx: regulator index
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* @uV: voltage in uV
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*
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* Return: voltage in hex on success, -ve on failure
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*/
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static int max77663_sd_volt2hex(int idx, int uV)
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{
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switch (idx) {
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case 0:
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/* SD0 has max voltage 1.4V */
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if (uV > SD0_VOLT_MAX)
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return -EINVAL;
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break;
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case 1:
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/* SD1 has max voltage 1.55V */
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if (uV > SD1_VOLT_MAX)
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return -EINVAL;
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break;
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default:
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/* SD2 and SD3 have max voltage 3.79V */
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if (uV > SD_VOLT_MAX)
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return -EINVAL;
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break;
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};
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if (uV < SD_VOLT_MIN)
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uV = SD_VOLT_MIN;
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return (uV - SD_VOLT_BASE) / 12500;
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}
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/**
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* max77663_*_hex2volt() - convert register hex value into
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* actual voltage in uV
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*
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* @idx: regulator index
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* @hex: hex value of register
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*
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* Return: voltage in uV on success, -ve on failure
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*/
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static int max77663_sd_hex2volt(int idx, int hex)
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{
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switch (idx) {
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case 0:
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/* SD0 has max voltage 1.4V */
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if (hex > SD0_VOLT_MAX_HEX)
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return -EINVAL;
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break;
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case 1:
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/* SD1 has max voltage 1.55V */
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if (hex > SD1_VOLT_MAX_HEX)
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return -EINVAL;
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break;
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default:
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/* SD2 and SD3 have max voltage 3.79V */
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if (hex > SD_VOLT_MAX_HEX)
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return -EINVAL;
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break;
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};
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if (hex < SD_VOLT_MIN_HEX)
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hex = SD_VOLT_MIN_HEX;
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return SD_VOLT_BASE + hex * 12500;
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}
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static int max77663_sd_val(struct udevice *dev, int op, int *uV)
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{
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struct dm_regulator_uclass_plat *uc_pdata =
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dev_get_uclass_plat(dev);
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u32 adr = uc_pdata->volt_reg;
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int idx = dev->driver_data;
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int hex, ret;
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if (op == PMIC_OP_GET) {
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hex = pmic_reg_read(dev->parent, adr);
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if (hex < 0)
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return hex;
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*uV = 0;
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ret = max77663_sd_hex2volt(idx, hex);
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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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/* SD regulators use entire register for voltage */
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hex = max77663_sd_volt2hex(idx, *uV);
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if (hex < 0)
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return hex;
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return pmic_reg_write(dev->parent, adr, hex);
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}
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static int max77663_sd_probe(struct udevice *dev)
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{
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struct dm_regulator_uclass_plat *uc_pdata =
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dev_get_uclass_plat(dev);
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int idx = dev->driver_data;
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uc_pdata->type = REGULATOR_TYPE_BUCK;
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uc_pdata->ctrl_reg = max77663_sd_reg[0][idx];
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uc_pdata->volt_reg = max77663_sd_reg[1][idx];
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return 0;
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}
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static int sd_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 = max77663_sd_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 sd_set_value(struct udevice *dev, int uV)
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{
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return max77663_sd_val(dev, PMIC_OP_SET, &uV);
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}
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static int sd_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 = max77663_sd_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 sd_set_enable(struct udevice *dev, bool enable)
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{
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return max77663_sd_enable(dev, PMIC_OP_SET, &enable);
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}
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static const struct dm_regulator_ops max77663_sd_ops = {
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.get_value = sd_get_value,
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.set_value = sd_set_value,
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.get_enable = sd_get_enable,
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.set_enable = sd_set_enable,
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};
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U_BOOT_DRIVER(max77663_sd) = {
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.name = MAX77663_SD_DRIVER,
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.id = UCLASS_REGULATOR,
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.ops = &max77663_sd_ops,
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.probe = max77663_sd_probe,
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};
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static int max77663_ldo_enable(struct udevice *dev, int op, bool *enable)
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{
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struct dm_regulator_uclass_plat *uc_pdata =
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dev_get_uclass_plat(dev);
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u32 adr = uc_pdata->ctrl_reg;
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int val, ret;
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val = pmic_reg_read(dev->parent, adr);
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if (val < 0)
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return val;
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if (op == PMIC_OP_GET) {
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if (val & LDO_STATUS_MASK)
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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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val &= ~LDO_STATUS_MASK;
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if (*enable)
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val |= LDO_STATUS_MASK;
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ret = pmic_reg_write(dev->parent, adr, val);
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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 max77663_ldo_volt2hex(int idx, int uV)
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{
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switch (idx) {
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case 0:
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case 1:
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if (uV > LDO01_VOLT_MAX)
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return -EINVAL;
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return (uV - LDO_VOLT_BASE) / 25000;
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case 4:
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if (uV > LDO4_VOLT_MAX)
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return -EINVAL;
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return (uV - LDO_VOLT_BASE) / 12500;
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default:
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if (uV > LDO_VOLT_MAX)
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return -EINVAL;
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return (uV - LDO_VOLT_BASE) / 50000;
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};
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}
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static int max77663_ldo_hex2volt(int idx, int hex)
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{
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if (hex > LDO_VOLT_MAX_HEX)
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return -EINVAL;
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switch (idx) {
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case 0:
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case 1:
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return (hex * 25000) + LDO_VOLT_BASE;
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case 4:
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return (hex * 12500) + LDO_VOLT_BASE;
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default:
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return (hex * 50000) + LDO_VOLT_BASE;
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};
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}
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static int max77663_ldo_val(struct udevice *dev, int op, int *uV)
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{
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struct dm_regulator_uclass_plat *uc_pdata =
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dev_get_uclass_plat(dev);
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u32 adr = uc_pdata->ctrl_reg;
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int idx = dev->driver_data;
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int hex, val, ret;
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val = pmic_reg_read(dev->parent, adr);
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if (val < 0)
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return val;
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if (op == PMIC_OP_GET) {
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*uV = 0;
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ret = max77663_ldo_hex2volt(idx, val & LDO_VOLT_MASK);
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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 = max77663_ldo_volt2hex(idx, *uV);
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if (hex < 0)
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return hex;
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val &= ~LDO_VOLT_MASK;
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return pmic_reg_write(dev->parent, adr, val | hex);
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}
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static int max77663_ldo_probe(struct udevice *dev)
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{
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struct dm_regulator_uclass_plat *uc_pdata =
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dev_get_uclass_plat(dev);
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int idx = dev->driver_data;
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uc_pdata->type = REGULATOR_TYPE_LDO;
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uc_pdata->ctrl_reg = max77663_ldo_reg[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 = max77663_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 max77663_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 = max77663_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 max77663_ldo_enable(dev, PMIC_OP_SET, &enable);
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}
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static const struct dm_regulator_ops max77663_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(max77663_ldo) = {
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.name = MAX77663_LDO_DRIVER,
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.id = UCLASS_REGULATOR,
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.ops = &max77663_ldo_ops,
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.probe = max77663_ldo_probe,
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};
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