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- // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
- /*
- * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
- * Author: Christophe Kerello <christophe.kerello@st.com>
- */
- #include <common.h>
- #include <dm.h>
- #include <errno.h>
- #include <linux/delay.h>
- #include <power/pmic.h>
- #include <power/regulator.h>
- #include <power/stpmic1.h>
- struct stpmic1_range {
- int min_uv;
- int min_sel;
- int max_sel;
- int step;
- };
- struct stpmic1_output {
- const struct stpmic1_range *ranges;
- int nbranges;
- };
- #define STPMIC1_MODE(_id, _val, _name) { \
- .id = _id, \
- .register_value = _val, \
- .name = _name, \
- }
- #define STPMIC1_RANGE(_min_uv, _min_sel, _max_sel, _step) { \
- .min_uv = _min_uv, \
- .min_sel = _min_sel, \
- .max_sel = _max_sel, \
- .step = _step, \
- }
- #define STPMIC1_OUTPUT(_ranges, _nbranges) { \
- .ranges = _ranges, \
- .nbranges = _nbranges, \
- }
- static int stpmic1_output_find_uv(int sel,
- const struct stpmic1_output *output)
- {
- const struct stpmic1_range *range;
- int i;
- for (i = 0, range = output->ranges;
- i < output->nbranges; i++, range++) {
- if (sel >= range->min_sel && sel <= range->max_sel)
- return range->min_uv +
- (sel - range->min_sel) * range->step;
- }
- return -EINVAL;
- }
- static int stpmic1_output_find_sel(int uv,
- const struct stpmic1_output *output)
- {
- const struct stpmic1_range *range;
- int i;
- for (i = 0, range = output->ranges;
- i < output->nbranges; i++, range++) {
- if (uv == range->min_uv && !range->step)
- return range->min_sel;
- if (uv >= range->min_uv &&
- uv <= range->min_uv +
- (range->max_sel - range->min_sel) * range->step)
- return range->min_sel +
- (uv - range->min_uv) / range->step;
- }
- return -EINVAL;
- }
- /*
- * BUCK regulators
- */
- static const struct stpmic1_range buck1_ranges[] = {
- STPMIC1_RANGE(725000, 0, 4, 0),
- STPMIC1_RANGE(725000, 5, 36, 25000),
- STPMIC1_RANGE(1500000, 37, 63, 0),
- };
- static const struct stpmic1_range buck2_ranges[] = {
- STPMIC1_RANGE(1000000, 0, 17, 0),
- STPMIC1_RANGE(1050000, 18, 19, 0),
- STPMIC1_RANGE(1100000, 20, 21, 0),
- STPMIC1_RANGE(1150000, 22, 23, 0),
- STPMIC1_RANGE(1200000, 24, 25, 0),
- STPMIC1_RANGE(1250000, 26, 27, 0),
- STPMIC1_RANGE(1300000, 28, 29, 0),
- STPMIC1_RANGE(1350000, 30, 31, 0),
- STPMIC1_RANGE(1400000, 32, 33, 0),
- STPMIC1_RANGE(1450000, 34, 35, 0),
- STPMIC1_RANGE(1500000, 36, 63, 0),
- };
- static const struct stpmic1_range buck3_ranges[] = {
- STPMIC1_RANGE(1000000, 0, 19, 0),
- STPMIC1_RANGE(1100000, 20, 23, 0),
- STPMIC1_RANGE(1200000, 24, 27, 0),
- STPMIC1_RANGE(1300000, 28, 31, 0),
- STPMIC1_RANGE(1400000, 32, 35, 0),
- STPMIC1_RANGE(1500000, 36, 55, 100000),
- STPMIC1_RANGE(3400000, 56, 63, 0),
- };
- static const struct stpmic1_range buck4_ranges[] = {
- STPMIC1_RANGE(600000, 0, 27, 25000),
- STPMIC1_RANGE(1300000, 28, 29, 0),
- STPMIC1_RANGE(1350000, 30, 31, 0),
- STPMIC1_RANGE(1400000, 32, 33, 0),
- STPMIC1_RANGE(1450000, 34, 35, 0),
- STPMIC1_RANGE(1500000, 36, 60, 100000),
- STPMIC1_RANGE(3900000, 61, 63, 0),
- };
- /* BUCK: 1,2,3,4 - voltage ranges */
- static const struct stpmic1_output buck_voltage_range[] = {
- STPMIC1_OUTPUT(buck1_ranges, ARRAY_SIZE(buck1_ranges)),
- STPMIC1_OUTPUT(buck2_ranges, ARRAY_SIZE(buck2_ranges)),
- STPMIC1_OUTPUT(buck3_ranges, ARRAY_SIZE(buck3_ranges)),
- STPMIC1_OUTPUT(buck4_ranges, ARRAY_SIZE(buck4_ranges)),
- };
- /* BUCK modes */
- static const struct dm_regulator_mode buck_modes[] = {
- STPMIC1_MODE(STPMIC1_PREG_MODE_HP, STPMIC1_PREG_MODE_HP, "HP"),
- STPMIC1_MODE(STPMIC1_PREG_MODE_LP, STPMIC1_PREG_MODE_LP, "LP"),
- };
- static int stpmic1_buck_get_uv(struct udevice *dev, int buck)
- {
- int sel;
- sel = pmic_reg_read(dev, STPMIC1_BUCKX_MAIN_CR(buck));
- if (sel < 0)
- return sel;
- sel &= STPMIC1_BUCK_VOUT_MASK;
- sel >>= STPMIC1_BUCK_VOUT_SHIFT;
- return stpmic1_output_find_uv(sel, &buck_voltage_range[buck]);
- }
- static int stpmic1_buck_get_value(struct udevice *dev)
- {
- return stpmic1_buck_get_uv(dev->parent, dev->driver_data - 1);
- }
- static int stpmic1_buck_set_value(struct udevice *dev, int uv)
- {
- int sel, buck = dev->driver_data - 1;
- sel = stpmic1_output_find_sel(uv, &buck_voltage_range[buck]);
- if (sel < 0)
- return sel;
- return pmic_clrsetbits(dev->parent,
- STPMIC1_BUCKX_MAIN_CR(buck),
- STPMIC1_BUCK_VOUT_MASK,
- sel << STPMIC1_BUCK_VOUT_SHIFT);
- }
- static int stpmic1_buck_get_enable(struct udevice *dev)
- {
- int ret;
- ret = pmic_reg_read(dev->parent,
- STPMIC1_BUCKX_MAIN_CR(dev->driver_data - 1));
- if (ret < 0)
- return false;
- return ret & STPMIC1_BUCK_ENA ? true : false;
- }
- static int stpmic1_buck_set_enable(struct udevice *dev, bool enable)
- {
- struct dm_regulator_uclass_plat *uc_pdata;
- int delay = enable ? STPMIC1_DEFAULT_START_UP_DELAY_MS :
- STPMIC1_DEFAULT_STOP_DELAY_MS;
- int ret, uv;
- /* if regulator is already in the wanted state, nothing to do */
- if (stpmic1_buck_get_enable(dev) == enable)
- return 0;
- if (enable) {
- uc_pdata = dev_get_uclass_plat(dev);
- uv = stpmic1_buck_get_value(dev);
- if (uv < uc_pdata->min_uV || uv > uc_pdata->max_uV)
- stpmic1_buck_set_value(dev, uc_pdata->min_uV);
- }
- ret = pmic_clrsetbits(dev->parent,
- STPMIC1_BUCKX_MAIN_CR(dev->driver_data - 1),
- STPMIC1_BUCK_ENA, enable ? STPMIC1_BUCK_ENA : 0);
- mdelay(delay);
- return ret;
- }
- static int stpmic1_buck_get_mode(struct udevice *dev)
- {
- int ret;
- ret = pmic_reg_read(dev->parent,
- STPMIC1_BUCKX_MAIN_CR(dev->driver_data - 1));
- if (ret < 0)
- return ret;
- return ret & STPMIC1_BUCK_PREG_MODE ? STPMIC1_PREG_MODE_LP :
- STPMIC1_PREG_MODE_HP;
- }
- static int stpmic1_buck_set_mode(struct udevice *dev, int mode)
- {
- return pmic_clrsetbits(dev->parent,
- STPMIC1_BUCKX_MAIN_CR(dev->driver_data - 1),
- STPMIC1_BUCK_PREG_MODE,
- mode ? STPMIC1_BUCK_PREG_MODE : 0);
- }
- static int stpmic1_buck_probe(struct udevice *dev)
- {
- struct dm_regulator_uclass_plat *uc_pdata;
- if (!dev->driver_data || dev->driver_data > STPMIC1_MAX_BUCK)
- return -EINVAL;
- uc_pdata = dev_get_uclass_plat(dev);
- uc_pdata->type = REGULATOR_TYPE_BUCK;
- uc_pdata->mode = (struct dm_regulator_mode *)buck_modes;
- uc_pdata->mode_count = ARRAY_SIZE(buck_modes);
- return 0;
- }
- static const struct dm_regulator_ops stpmic1_buck_ops = {
- .get_value = stpmic1_buck_get_value,
- .set_value = stpmic1_buck_set_value,
- .get_enable = stpmic1_buck_get_enable,
- .set_enable = stpmic1_buck_set_enable,
- .get_mode = stpmic1_buck_get_mode,
- .set_mode = stpmic1_buck_set_mode,
- };
- U_BOOT_DRIVER(stpmic1_buck) = {
- .name = "stpmic1_buck",
- .id = UCLASS_REGULATOR,
- .ops = &stpmic1_buck_ops,
- .probe = stpmic1_buck_probe,
- };
- /*
- * LDO regulators
- */
- static const struct stpmic1_range ldo12_ranges[] = {
- STPMIC1_RANGE(1700000, 0, 7, 0),
- STPMIC1_RANGE(1700000, 8, 24, 100000),
- STPMIC1_RANGE(3300000, 25, 31, 0),
- };
- static const struct stpmic1_range ldo3_ranges[] = {
- STPMIC1_RANGE(1700000, 0, 7, 0),
- STPMIC1_RANGE(1700000, 8, 24, 100000),
- STPMIC1_RANGE(3300000, 25, 30, 0),
- /* Sel 31 is special case when LDO3 is in mode sync_source (BUCK2/2) */
- };
- static const struct stpmic1_range ldo5_ranges[] = {
- STPMIC1_RANGE(1700000, 0, 7, 0),
- STPMIC1_RANGE(1700000, 8, 30, 100000),
- STPMIC1_RANGE(3900000, 31, 31, 0),
- };
- static const struct stpmic1_range ldo6_ranges[] = {
- STPMIC1_RANGE(900000, 0, 24, 100000),
- STPMIC1_RANGE(3300000, 25, 31, 0),
- };
- /* LDO: 1,2,3,4,5,6 - voltage ranges */
- static const struct stpmic1_output ldo_voltage_range[] = {
- STPMIC1_OUTPUT(ldo12_ranges, ARRAY_SIZE(ldo12_ranges)),
- STPMIC1_OUTPUT(ldo12_ranges, ARRAY_SIZE(ldo12_ranges)),
- STPMIC1_OUTPUT(ldo3_ranges, ARRAY_SIZE(ldo3_ranges)),
- STPMIC1_OUTPUT(NULL, 0),
- STPMIC1_OUTPUT(ldo5_ranges, ARRAY_SIZE(ldo5_ranges)),
- STPMIC1_OUTPUT(ldo6_ranges, ARRAY_SIZE(ldo6_ranges)),
- };
- /* LDO modes */
- static const struct dm_regulator_mode ldo_modes[] = {
- STPMIC1_MODE(STPMIC1_LDO_MODE_NORMAL,
- STPMIC1_LDO_MODE_NORMAL, "NORMAL"),
- STPMIC1_MODE(STPMIC1_LDO_MODE_BYPASS,
- STPMIC1_LDO_MODE_BYPASS, "BYPASS"),
- STPMIC1_MODE(STPMIC1_LDO_MODE_SINK_SOURCE,
- STPMIC1_LDO_MODE_SINK_SOURCE, "SINK SOURCE"),
- };
- static int stpmic1_ldo_get_value(struct udevice *dev)
- {
- int sel, ldo = dev->driver_data - 1;
- sel = pmic_reg_read(dev->parent, STPMIC1_LDOX_MAIN_CR(ldo));
- if (sel < 0)
- return sel;
- /* ldo4 => 3,3V */
- if (ldo == STPMIC1_LDO4)
- return STPMIC1_LDO4_UV;
- sel &= STPMIC1_LDO12356_VOUT_MASK;
- sel >>= STPMIC1_LDO12356_VOUT_SHIFT;
- /* ldo3, sel = 31 => BUCK2/2 */
- if (ldo == STPMIC1_LDO3 && sel == STPMIC1_LDO3_DDR_SEL)
- return stpmic1_buck_get_uv(dev->parent, STPMIC1_BUCK2) / 2;
- return stpmic1_output_find_uv(sel, &ldo_voltage_range[ldo]);
- }
- static int stpmic1_ldo_set_value(struct udevice *dev, int uv)
- {
- int sel, ldo = dev->driver_data - 1;
- /* ldo4 => not possible */
- if (ldo == STPMIC1_LDO4)
- return -EINVAL;
- sel = stpmic1_output_find_sel(uv, &ldo_voltage_range[ldo]);
- if (sel < 0)
- return sel;
- return pmic_clrsetbits(dev->parent,
- STPMIC1_LDOX_MAIN_CR(ldo),
- STPMIC1_LDO12356_VOUT_MASK,
- sel << STPMIC1_LDO12356_VOUT_SHIFT);
- }
- static int stpmic1_ldo_get_enable(struct udevice *dev)
- {
- int ret;
- ret = pmic_reg_read(dev->parent,
- STPMIC1_LDOX_MAIN_CR(dev->driver_data - 1));
- if (ret < 0)
- return false;
- return ret & STPMIC1_LDO_ENA ? true : false;
- }
- static int stpmic1_ldo_set_enable(struct udevice *dev, bool enable)
- {
- struct dm_regulator_uclass_plat *uc_pdata;
- int delay = enable ? STPMIC1_DEFAULT_START_UP_DELAY_MS :
- STPMIC1_DEFAULT_STOP_DELAY_MS;
- int ret, uv;
- /* if regulator is already in the wanted state, nothing to do */
- if (stpmic1_ldo_get_enable(dev) == enable)
- return 0;
- if (enable) {
- uc_pdata = dev_get_uclass_plat(dev);
- uv = stpmic1_ldo_get_value(dev);
- if (uv < uc_pdata->min_uV || uv > uc_pdata->max_uV)
- stpmic1_ldo_set_value(dev, uc_pdata->min_uV);
- }
- ret = pmic_clrsetbits(dev->parent,
- STPMIC1_LDOX_MAIN_CR(dev->driver_data - 1),
- STPMIC1_LDO_ENA, enable ? STPMIC1_LDO_ENA : 0);
- mdelay(delay);
- return ret;
- }
- static int stpmic1_ldo_get_mode(struct udevice *dev)
- {
- int ret, ldo = dev->driver_data - 1;
- if (ldo != STPMIC1_LDO3)
- return -EINVAL;
- ret = pmic_reg_read(dev->parent, STPMIC1_LDOX_MAIN_CR(ldo));
- if (ret < 0)
- return ret;
- if (ret & STPMIC1_LDO3_MODE)
- return STPMIC1_LDO_MODE_BYPASS;
- ret &= STPMIC1_LDO12356_VOUT_MASK;
- ret >>= STPMIC1_LDO12356_VOUT_SHIFT;
- return ret == STPMIC1_LDO3_DDR_SEL ? STPMIC1_LDO_MODE_SINK_SOURCE :
- STPMIC1_LDO_MODE_NORMAL;
- }
- static int stpmic1_ldo_set_mode(struct udevice *dev, int mode)
- {
- int ret, ldo = dev->driver_data - 1;
- if (ldo != STPMIC1_LDO3)
- return -EINVAL;
- ret = pmic_reg_read(dev->parent, STPMIC1_LDOX_MAIN_CR(ldo));
- if (ret < 0)
- return ret;
- switch (mode) {
- case STPMIC1_LDO_MODE_SINK_SOURCE:
- ret &= ~STPMIC1_LDO12356_VOUT_MASK;
- ret |= STPMIC1_LDO3_DDR_SEL << STPMIC1_LDO12356_VOUT_SHIFT;
- /* fallthrough */
- case STPMIC1_LDO_MODE_NORMAL:
- ret &= ~STPMIC1_LDO3_MODE;
- break;
- case STPMIC1_LDO_MODE_BYPASS:
- ret |= STPMIC1_LDO3_MODE;
- break;
- }
- return pmic_reg_write(dev->parent, STPMIC1_LDOX_MAIN_CR(ldo), ret);
- }
- static int stpmic1_ldo_probe(struct udevice *dev)
- {
- struct dm_regulator_uclass_plat *uc_pdata;
- if (!dev->driver_data || dev->driver_data > STPMIC1_MAX_LDO)
- return -EINVAL;
- uc_pdata = dev_get_uclass_plat(dev);
- uc_pdata->type = REGULATOR_TYPE_LDO;
- if (dev->driver_data - 1 == STPMIC1_LDO3) {
- uc_pdata->mode = (struct dm_regulator_mode *)ldo_modes;
- uc_pdata->mode_count = ARRAY_SIZE(ldo_modes);
- } else {
- uc_pdata->mode_count = 0;
- }
- return 0;
- }
- static const struct dm_regulator_ops stpmic1_ldo_ops = {
- .get_value = stpmic1_ldo_get_value,
- .set_value = stpmic1_ldo_set_value,
- .get_enable = stpmic1_ldo_get_enable,
- .set_enable = stpmic1_ldo_set_enable,
- .get_mode = stpmic1_ldo_get_mode,
- .set_mode = stpmic1_ldo_set_mode,
- };
- U_BOOT_DRIVER(stpmic1_ldo) = {
- .name = "stpmic1_ldo",
- .id = UCLASS_REGULATOR,
- .ops = &stpmic1_ldo_ops,
- .probe = stpmic1_ldo_probe,
- };
- /*
- * VREF DDR regulator
- */
- static int stpmic1_vref_ddr_get_value(struct udevice *dev)
- {
- /* BUCK2/2 */
- return stpmic1_buck_get_uv(dev->parent, STPMIC1_BUCK2) / 2;
- }
- static int stpmic1_vref_ddr_get_enable(struct udevice *dev)
- {
- int ret;
- ret = pmic_reg_read(dev->parent, STPMIC1_REFDDR_MAIN_CR);
- if (ret < 0)
- return false;
- return ret & STPMIC1_VREF_ENA ? true : false;
- }
- static int stpmic1_vref_ddr_set_enable(struct udevice *dev, bool enable)
- {
- int delay = enable ? STPMIC1_DEFAULT_START_UP_DELAY_MS :
- STPMIC1_DEFAULT_STOP_DELAY_MS;
- int ret;
- /* if regulator is already in the wanted state, nothing to do */
- if (stpmic1_vref_ddr_get_enable(dev) == enable)
- return 0;
- ret = pmic_clrsetbits(dev->parent, STPMIC1_REFDDR_MAIN_CR,
- STPMIC1_VREF_ENA, enable ? STPMIC1_VREF_ENA : 0);
- mdelay(delay);
- return ret;
- }
- static int stpmic1_vref_ddr_probe(struct udevice *dev)
- {
- struct dm_regulator_uclass_plat *uc_pdata;
- uc_pdata = dev_get_uclass_plat(dev);
- uc_pdata->type = REGULATOR_TYPE_FIXED;
- uc_pdata->mode_count = 0;
- return 0;
- }
- static const struct dm_regulator_ops stpmic1_vref_ddr_ops = {
- .get_value = stpmic1_vref_ddr_get_value,
- .get_enable = stpmic1_vref_ddr_get_enable,
- .set_enable = stpmic1_vref_ddr_set_enable,
- };
- U_BOOT_DRIVER(stpmic1_vref_ddr) = {
- .name = "stpmic1_vref_ddr",
- .id = UCLASS_REGULATOR,
- .ops = &stpmic1_vref_ddr_ops,
- .probe = stpmic1_vref_ddr_probe,
- };
- /*
- * BOOST regulator
- */
- static int stpmic1_boost_get_enable(struct udevice *dev)
- {
- int ret;
- ret = pmic_reg_read(dev->parent, STPMIC1_BST_SW_CR);
- if (ret < 0)
- return false;
- return ret & STPMIC1_BST_ON ? true : false;
- }
- static int stpmic1_boost_set_enable(struct udevice *dev, bool enable)
- {
- int ret;
- ret = pmic_reg_read(dev->parent, STPMIC1_BST_SW_CR);
- if (ret < 0)
- return ret;
- if (!enable && ret & STPMIC1_PWR_SW_ON)
- return -EINVAL;
- /* if regulator is already in the wanted state, nothing to do */
- if (!!(ret & STPMIC1_BST_ON) == enable)
- return 0;
- ret = pmic_clrsetbits(dev->parent, STPMIC1_BST_SW_CR,
- STPMIC1_BST_ON,
- enable ? STPMIC1_BST_ON : 0);
- if (enable)
- mdelay(STPMIC1_USB_BOOST_START_UP_DELAY_MS);
- return ret;
- }
- static int stpmic1_boost_probe(struct udevice *dev)
- {
- struct dm_regulator_uclass_plat *uc_pdata;
- uc_pdata = dev_get_uclass_plat(dev);
- uc_pdata->type = REGULATOR_TYPE_FIXED;
- uc_pdata->mode_count = 0;
- return 0;
- }
- static const struct dm_regulator_ops stpmic1_boost_ops = {
- .get_enable = stpmic1_boost_get_enable,
- .set_enable = stpmic1_boost_set_enable,
- };
- U_BOOT_DRIVER(stpmic1_boost) = {
- .name = "stpmic1_boost",
- .id = UCLASS_REGULATOR,
- .ops = &stpmic1_boost_ops,
- .probe = stpmic1_boost_probe,
- };
- /*
- * USB power switch
- */
- static int stpmic1_pwr_sw_get_enable(struct udevice *dev)
- {
- uint mask = 1 << dev->driver_data;
- int ret;
- ret = pmic_reg_read(dev->parent, STPMIC1_BST_SW_CR);
- if (ret < 0)
- return false;
- return ret & mask ? true : false;
- }
- static int stpmic1_pwr_sw_set_enable(struct udevice *dev, bool enable)
- {
- uint mask = 1 << dev->driver_data;
- int delay = enable ? STPMIC1_DEFAULT_START_UP_DELAY_MS :
- STPMIC1_DEFAULT_STOP_DELAY_MS;
- int ret;
- ret = pmic_reg_read(dev->parent, STPMIC1_BST_SW_CR);
- if (ret < 0)
- return ret;
- /* if regulator is already in the wanted state, nothing to do */
- if (!!(ret & mask) == enable)
- return 0;
- /* Boost management */
- if (enable && !(ret & STPMIC1_BST_ON)) {
- pmic_clrsetbits(dev->parent, STPMIC1_BST_SW_CR,
- STPMIC1_BST_ON, STPMIC1_BST_ON);
- mdelay(STPMIC1_USB_BOOST_START_UP_DELAY_MS);
- } else if (!enable && ret & STPMIC1_BST_ON &&
- (ret & STPMIC1_PWR_SW_ON) != STPMIC1_PWR_SW_ON) {
- pmic_clrsetbits(dev->parent, STPMIC1_BST_SW_CR,
- STPMIC1_BST_ON, 0);
- }
- ret = pmic_clrsetbits(dev->parent, STPMIC1_BST_SW_CR,
- mask, enable ? mask : 0);
- mdelay(delay);
- return ret;
- }
- static int stpmic1_pwr_sw_probe(struct udevice *dev)
- {
- struct dm_regulator_uclass_plat *uc_pdata;
- if (!dev->driver_data || dev->driver_data > STPMIC1_MAX_PWR_SW)
- return -EINVAL;
- uc_pdata = dev_get_uclass_plat(dev);
- uc_pdata->type = REGULATOR_TYPE_FIXED;
- uc_pdata->mode_count = 0;
- return 0;
- }
- static const struct dm_regulator_ops stpmic1_pwr_sw_ops = {
- .get_enable = stpmic1_pwr_sw_get_enable,
- .set_enable = stpmic1_pwr_sw_set_enable,
- };
- U_BOOT_DRIVER(stpmic1_pwr_sw) = {
- .name = "stpmic1_pwr_sw",
- .id = UCLASS_REGULATOR,
- .ops = &stpmic1_pwr_sw_ops,
- .probe = stpmic1_pwr_sw_probe,
- };
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