^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * isl6271a-regulator.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Support for Intersil ISL6271A voltage regulator
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2010 Marek Vasut <marek.vasut@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * This program is free software; you can redistribute it and/or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * modify it under the terms of the GNU General Public License as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * published by the Free Software Foundation version 2.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * whether express or implied; without even the implied warranty of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * General Public License for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/regulator/driver.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define ISL6271A_VOLTAGE_MIN 850000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define ISL6271A_VOLTAGE_MAX 1600000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define ISL6271A_VOLTAGE_STEP 50000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) /* PMIC details */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct isl_pmic {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct mutex mtx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static int isl6271a_get_voltage_sel(struct regulator_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct isl_pmic *pmic = rdev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) int idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) mutex_lock(&pmic->mtx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) idx = i2c_smbus_read_byte(pmic->client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) if (idx < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) dev_err(&pmic->client->dev, "Error getting voltage\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) mutex_unlock(&pmic->mtx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) return idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static int isl6271a_set_voltage_sel(struct regulator_dev *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) unsigned selector)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct isl_pmic *pmic = rdev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) mutex_lock(&pmic->mtx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) err = i2c_smbus_write_byte(pmic->client, selector);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) dev_err(&pmic->client->dev, "Error setting voltage\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) mutex_unlock(&pmic->mtx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) static const struct regulator_ops isl_core_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) .get_voltage_sel = isl6271a_get_voltage_sel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) .set_voltage_sel = isl6271a_set_voltage_sel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) .list_voltage = regulator_list_voltage_linear,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) .map_voltage = regulator_map_voltage_linear,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) static const struct regulator_ops isl_fixed_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) .list_voltage = regulator_list_voltage_linear,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) static const struct regulator_desc isl_rd[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) .name = "Core Buck",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) .id = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) .n_voltages = 16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) .ops = &isl_core_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) .type = REGULATOR_VOLTAGE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) .min_uV = ISL6271A_VOLTAGE_MIN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) .uV_step = ISL6271A_VOLTAGE_STEP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) .name = "LDO1",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) .id = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) .n_voltages = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) .ops = &isl_fixed_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) .type = REGULATOR_VOLTAGE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) .min_uV = 1100000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) .name = "LDO2",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) .id = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) .n_voltages = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) .ops = &isl_fixed_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) .type = REGULATOR_VOLTAGE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) .min_uV = 1300000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static int isl6271a_probe(struct i2c_client *i2c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) struct regulator_dev *rdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) struct regulator_config config = { };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) struct isl_pmic *pmic;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) pmic = devm_kzalloc(&i2c->dev, sizeof(struct isl_pmic), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (!pmic)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) pmic->client = i2c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) mutex_init(&pmic->mtx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) for (i = 0; i < 3; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) config.dev = &i2c->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (i == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) config.init_data = init_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) config.init_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) config.driver_data = pmic;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) rdev = devm_regulator_register(&i2c->dev, &isl_rd[i], &config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) if (IS_ERR(rdev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) dev_err(&i2c->dev, "failed to register %s\n", id->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return PTR_ERR(rdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) i2c_set_clientdata(i2c, pmic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) static const struct i2c_device_id isl6271a_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) {.name = "isl6271a", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) { },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) MODULE_DEVICE_TABLE(i2c, isl6271a_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) static struct i2c_driver isl6271a_i2c_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) .name = "isl6271a",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) .probe = isl6271a_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) .id_table = isl6271a_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) static int __init isl6271a_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) return i2c_add_driver(&isl6271a_i2c_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) static void __exit isl6271a_cleanup(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) i2c_del_driver(&isl6271a_i2c_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) subsys_initcall(isl6271a_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) module_exit(isl6271a_cleanup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) MODULE_DESCRIPTION("Intersil ISL6271A voltage regulator driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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