19952f691SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
26ffc3270SLaxman Dewangan /*
36ffc3270SLaxman Dewangan * Regulator driver for RICOH RC5T583 power management chip.
46ffc3270SLaxman Dewangan *
56ffc3270SLaxman Dewangan * Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved.
66ffc3270SLaxman Dewangan * Author: Laxman dewangan <ldewangan@nvidia.com>
76ffc3270SLaxman Dewangan *
86ffc3270SLaxman Dewangan * based on code
96ffc3270SLaxman Dewangan * Copyright (C) 2011 RICOH COMPANY,LTD
106ffc3270SLaxman Dewangan */
116ffc3270SLaxman Dewangan
126ffc3270SLaxman Dewangan #include <linux/module.h>
136ffc3270SLaxman Dewangan #include <linux/init.h>
146ffc3270SLaxman Dewangan #include <linux/slab.h>
156ffc3270SLaxman Dewangan #include <linux/err.h>
166ffc3270SLaxman Dewangan #include <linux/platform_device.h>
176ffc3270SLaxman Dewangan #include <linux/regulator/driver.h>
186ffc3270SLaxman Dewangan #include <linux/regulator/machine.h>
196ffc3270SLaxman Dewangan #include <linux/mfd/rc5t583.h>
206ffc3270SLaxman Dewangan
216ffc3270SLaxman Dewangan struct rc5t583_regulator_info {
226ffc3270SLaxman Dewangan int deepsleep_id;
236ffc3270SLaxman Dewangan
246ffc3270SLaxman Dewangan /* Regulator register address.*/
256ffc3270SLaxman Dewangan uint8_t reg_disc_reg;
266ffc3270SLaxman Dewangan uint8_t disc_bit;
276ffc3270SLaxman Dewangan uint8_t deepsleep_reg;
286ffc3270SLaxman Dewangan
296ffc3270SLaxman Dewangan /* Regulator specific turn-on delay and voltage settling time*/
306ffc3270SLaxman Dewangan int enable_uv_per_us;
316ffc3270SLaxman Dewangan
326ffc3270SLaxman Dewangan /* Used by regulator core */
336ffc3270SLaxman Dewangan struct regulator_desc desc;
346ffc3270SLaxman Dewangan };
356ffc3270SLaxman Dewangan
rc5t583_regulator_enable_time(struct regulator_dev * rdev)366ffc3270SLaxman Dewangan static int rc5t583_regulator_enable_time(struct regulator_dev *rdev)
376ffc3270SLaxman Dewangan {
38c07608f7SAxel Lin struct rc5t583_regulator_info *reg_info = rdev_get_drvdata(rdev);
3915b397d7SAxel Lin int vsel = regulator_get_voltage_sel_regmap(rdev);
403209be17SAxel Lin int curr_uV = regulator_list_voltage_linear(rdev, vsel);
4115b397d7SAxel Lin
42c07608f7SAxel Lin return DIV_ROUND_UP(curr_uV, reg_info->enable_uv_per_us);
436ffc3270SLaxman Dewangan }
446ffc3270SLaxman Dewangan
45fb74036bSBhumika Goyal static const struct regulator_ops rc5t583_ops = {
465bb6936cSAxel Lin .is_enabled = regulator_is_enabled_regmap,
475bb6936cSAxel Lin .enable = regulator_enable_regmap,
485bb6936cSAxel Lin .disable = regulator_disable_regmap,
496ffc3270SLaxman Dewangan .enable_time = rc5t583_regulator_enable_time,
5015b397d7SAxel Lin .get_voltage_sel = regulator_get_voltage_sel_regmap,
5170e5f645SAxel Lin .set_voltage_sel = regulator_set_voltage_sel_regmap,
523209be17SAxel Lin .list_voltage = regulator_list_voltage_linear,
5370e5f645SAxel Lin .map_voltage = regulator_map_voltage_linear,
542f6ae6efSAxel Lin .set_voltage_time_sel = regulator_set_voltage_time_sel,
556ffc3270SLaxman Dewangan };
566ffc3270SLaxman Dewangan
5795e301baSAxel Lin #define RC5T583_REG(_id, _en_reg, _en_bit, _disc_reg, _disc_bit, \
5895e301baSAxel Lin _vout_mask, _min_mv, _max_mv, _step_uV, _enable_mv) \
596ffc3270SLaxman Dewangan { \
606ffc3270SLaxman Dewangan .reg_disc_reg = RC5T583_REG_##_disc_reg, \
616ffc3270SLaxman Dewangan .disc_bit = _disc_bit, \
6295e301baSAxel Lin .deepsleep_reg = RC5T583_REG_##_id##DAC_DS, \
636ffc3270SLaxman Dewangan .enable_uv_per_us = _enable_mv * 1000, \
646ffc3270SLaxman Dewangan .deepsleep_id = RC5T583_DS_##_id, \
656ffc3270SLaxman Dewangan .desc = { \
666ffc3270SLaxman Dewangan .name = "rc5t583-regulator-"#_id, \
676ffc3270SLaxman Dewangan .id = RC5T583_REGULATOR_##_id, \
68e3a7384cSAxel Lin .n_voltages = (_max_mv - _min_mv) * 1000 / _step_uV + 1, \
696ffc3270SLaxman Dewangan .ops = &rc5t583_ops, \
706ffc3270SLaxman Dewangan .type = REGULATOR_VOLTAGE, \
716ffc3270SLaxman Dewangan .owner = THIS_MODULE, \
7215b397d7SAxel Lin .vsel_reg = RC5T583_REG_##_id##DAC, \
7315b397d7SAxel Lin .vsel_mask = _vout_mask, \
745bb6936cSAxel Lin .enable_reg = RC5T583_REG_##_en_reg, \
755bb6936cSAxel Lin .enable_mask = BIT(_en_bit), \
763209be17SAxel Lin .min_uV = _min_mv * 1000, \
773209be17SAxel Lin .uV_step = _step_uV, \
782f6ae6efSAxel Lin .ramp_delay = 40 * 1000, \
796ffc3270SLaxman Dewangan }, \
806ffc3270SLaxman Dewangan }
816ffc3270SLaxman Dewangan
826ffc3270SLaxman Dewangan static struct rc5t583_regulator_info rc5t583_reg_info[RC5T583_REGULATOR_MAX] = {
8395e301baSAxel Lin RC5T583_REG(DC0, DC0CTL, 0, DC0CTL, 1, 0x7F, 700, 1500, 12500, 4),
8495e301baSAxel Lin RC5T583_REG(DC1, DC1CTL, 0, DC1CTL, 1, 0x7F, 700, 1500, 12500, 14),
8595e301baSAxel Lin RC5T583_REG(DC2, DC2CTL, 0, DC2CTL, 1, 0x7F, 900, 2400, 12500, 14),
8695e301baSAxel Lin RC5T583_REG(DC3, DC3CTL, 0, DC3CTL, 1, 0x7F, 900, 2400, 12500, 14),
8795e301baSAxel Lin RC5T583_REG(LDO0, LDOEN2, 0, LDODIS2, 0, 0x7F, 900, 3400, 25000, 160),
8895e301baSAxel Lin RC5T583_REG(LDO1, LDOEN2, 1, LDODIS2, 1, 0x7F, 900, 3400, 25000, 160),
8995e301baSAxel Lin RC5T583_REG(LDO2, LDOEN2, 2, LDODIS2, 2, 0x7F, 900, 3400, 25000, 160),
9095e301baSAxel Lin RC5T583_REG(LDO3, LDOEN2, 3, LDODIS2, 3, 0x7F, 900, 3400, 25000, 160),
9195e301baSAxel Lin RC5T583_REG(LDO4, LDOEN2, 4, LDODIS2, 4, 0x3F, 750, 1500, 12500, 133),
9295e301baSAxel Lin RC5T583_REG(LDO5, LDOEN2, 5, LDODIS2, 5, 0x7F, 900, 3400, 25000, 267),
9395e301baSAxel Lin RC5T583_REG(LDO6, LDOEN2, 6, LDODIS2, 6, 0x7F, 900, 3400, 25000, 133),
9495e301baSAxel Lin RC5T583_REG(LDO7, LDOEN2, 7, LDODIS2, 7, 0x7F, 900, 3400, 25000, 233),
9595e301baSAxel Lin RC5T583_REG(LDO8, LDOEN1, 0, LDODIS1, 0, 0x7F, 900, 3400, 25000, 233),
9695e301baSAxel Lin RC5T583_REG(LDO9, LDOEN1, 1, LDODIS1, 1, 0x7F, 900, 3400, 25000, 133),
976ffc3270SLaxman Dewangan };
986ffc3270SLaxman Dewangan
rc5t583_regulator_probe(struct platform_device * pdev)99a5023574SBill Pemberton static int rc5t583_regulator_probe(struct platform_device *pdev)
1006ffc3270SLaxman Dewangan {
1016ffc3270SLaxman Dewangan struct rc5t583 *rc5t583 = dev_get_drvdata(pdev->dev.parent);
1026ffc3270SLaxman Dewangan struct rc5t583_platform_data *pdata = dev_get_platdata(rc5t583->dev);
103c172708dSMark Brown struct regulator_config config = { };
1046ffc3270SLaxman Dewangan struct regulator_dev *rdev;
1056ffc3270SLaxman Dewangan struct rc5t583_regulator_info *ri;
1066ffc3270SLaxman Dewangan int ret;
1076ffc3270SLaxman Dewangan int id;
1086ffc3270SLaxman Dewangan
1096ffc3270SLaxman Dewangan if (!pdata) {
1106ffc3270SLaxman Dewangan dev_err(&pdev->dev, "No platform data, exiting...\n");
1116ffc3270SLaxman Dewangan return -ENODEV;
1126ffc3270SLaxman Dewangan }
1136ffc3270SLaxman Dewangan
1146ffc3270SLaxman Dewangan for (id = 0; id < RC5T583_REGULATOR_MAX; ++id) {
1156ffc3270SLaxman Dewangan ri = &rc5t583_reg_info[id];
1166ffc3270SLaxman Dewangan
1176ffc3270SLaxman Dewangan if (ri->deepsleep_id == RC5T583_DS_NONE)
1186ffc3270SLaxman Dewangan goto skip_ext_pwr_config;
1196ffc3270SLaxman Dewangan
1206ffc3270SLaxman Dewangan ret = rc5t583_ext_power_req_config(rc5t583->dev,
1216ffc3270SLaxman Dewangan ri->deepsleep_id,
1226ffc3270SLaxman Dewangan pdata->regulator_ext_pwr_control[id],
1236ffc3270SLaxman Dewangan pdata->regulator_deepsleep_slot[id]);
1246ffc3270SLaxman Dewangan /*
1256ffc3270SLaxman Dewangan * Configuring external control is not a major issue,
1266ffc3270SLaxman Dewangan * just give warning.
1276ffc3270SLaxman Dewangan */
1286ffc3270SLaxman Dewangan if (ret < 0)
1296ffc3270SLaxman Dewangan dev_warn(&pdev->dev,
1306ffc3270SLaxman Dewangan "Failed to configure ext control %d\n", id);
1316ffc3270SLaxman Dewangan
1326ffc3270SLaxman Dewangan skip_ext_pwr_config:
133c172708dSMark Brown config.dev = &pdev->dev;
1343f24bf70SAxel Lin config.init_data = pdata->reg_init_data[id];
135c07608f7SAxel Lin config.driver_data = ri;
1365bb6936cSAxel Lin config.regmap = rc5t583->regmap;
137c172708dSMark Brown
13813775309SSachin Kamat rdev = devm_regulator_register(&pdev->dev, &ri->desc, &config);
139a69df8a1SAxel Lin if (IS_ERR(rdev)) {
1406ffc3270SLaxman Dewangan dev_err(&pdev->dev, "Failed to register regulator %s\n",
1416ffc3270SLaxman Dewangan ri->desc.name);
14213775309SSachin Kamat return PTR_ERR(rdev);
1436ffc3270SLaxman Dewangan }
1446ffc3270SLaxman Dewangan }
1456ffc3270SLaxman Dewangan return 0;
1466ffc3270SLaxman Dewangan }
1476ffc3270SLaxman Dewangan
1486ffc3270SLaxman Dewangan static struct platform_driver rc5t583_regulator_driver = {
1496ffc3270SLaxman Dewangan .driver = {
1506ffc3270SLaxman Dewangan .name = "rc5t583-regulator",
151*259b93b2SDouglas Anderson .probe_type = PROBE_PREFER_ASYNCHRONOUS,
1526ffc3270SLaxman Dewangan },
1536ffc3270SLaxman Dewangan .probe = rc5t583_regulator_probe,
1546ffc3270SLaxman Dewangan };
1556ffc3270SLaxman Dewangan
rc5t583_regulator_init(void)1566ffc3270SLaxman Dewangan static int __init rc5t583_regulator_init(void)
1576ffc3270SLaxman Dewangan {
1586ffc3270SLaxman Dewangan return platform_driver_register(&rc5t583_regulator_driver);
1596ffc3270SLaxman Dewangan }
1606ffc3270SLaxman Dewangan subsys_initcall(rc5t583_regulator_init);
1616ffc3270SLaxman Dewangan
rc5t583_regulator_exit(void)1626ffc3270SLaxman Dewangan static void __exit rc5t583_regulator_exit(void)
1636ffc3270SLaxman Dewangan {
1646ffc3270SLaxman Dewangan platform_driver_unregister(&rc5t583_regulator_driver);
1656ffc3270SLaxman Dewangan }
1666ffc3270SLaxman Dewangan module_exit(rc5t583_regulator_exit);
1676ffc3270SLaxman Dewangan
1686ffc3270SLaxman Dewangan MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
1696ffc3270SLaxman Dewangan MODULE_DESCRIPTION("RC5T583 regulator driver");
1706ffc3270SLaxman Dewangan MODULE_ALIAS("platform:rc5t583-regulator");
1714eb06453SLaxman Dewangan MODULE_LICENSE("GPL v2");
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