| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Marek Szyprowski | 1837 | 87.48% | 1 | 4.55% |
| Axel Lin | 148 | 7.05% | 9 | 40.91% |
| Mark Brown | 37 | 1.76% | 3 | 13.64% |
| Dmitry Torokhov | 35 | 1.67% | 1 | 4.55% |
| Nikolay Balandin | 12 | 0.57% | 1 | 4.55% |
| Julia Lawall | 9 | 0.43% | 1 | 4.55% |
| Dan Carpenter | 7 | 0.33% | 1 | 4.55% |
| Tobias Klauser | 4 | 0.19% | 1 | 4.55% |
| Jingoo Han | 4 | 0.19% | 1 | 4.55% |
| Paul Gortmaker | 3 | 0.14% | 1 | 4.55% |
| Tejun Heo | 3 | 0.14% | 1 | 4.55% |
| Sachin Kamat | 1 | 0.05% | 1 | 4.55% |
| Total | 2100 | 22 |
/* * Regulator driver for National Semiconductors LP3971 PMIC chip * * Copyright (C) 2009 Samsung Electronics * Author: Marek Szyprowski <m.szyprowski@samsung.com> * * Based on wm8350.c * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * */ #include <linux/bug.h> #include <linux/err.h> #include <linux/i2c.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/regulator/driver.h> #include <linux/regulator/lp3971.h> #include <linux/slab.h> struct lp3971 { struct device *dev; struct mutex io_lock; struct i2c_client *i2c; }; static u8 lp3971_reg_read(struct lp3971 *lp3971, u8 reg); static int lp3971_set_bits(struct lp3971 *lp3971, u8 reg, u16 mask, u16 val); #define LP3971_SYS_CONTROL1_REG 0x07 /* System control register 1 initial value, bits 4 and 5 are EPROM programmable */ #define SYS_CONTROL1_INIT_VAL 0x40 #define SYS_CONTROL1_INIT_MASK 0xCF #define LP3971_BUCK_VOL_ENABLE_REG 0x10 #define LP3971_BUCK_VOL_CHANGE_REG 0x20 /* Voltage control registers shift: LP3971_BUCK1 -> 0 LP3971_BUCK2 -> 4 LP3971_BUCK3 -> 6 */ #define BUCK_VOL_CHANGE_SHIFT(x) (((!!x) << 2) | (x & ~0x01)) #define BUCK_VOL_CHANGE_FLAG_GO 0x01 #define BUCK_VOL_CHANGE_FLAG_TARGET 0x02 #define BUCK_VOL_CHANGE_FLAG_MASK 0x03 #define LP3971_BUCK1_BASE 0x23 #define LP3971_BUCK2_BASE 0x29 #define LP3971_BUCK3_BASE 0x32 static const int buck_base_addr[] = { LP3971_BUCK1_BASE, LP3971_BUCK2_BASE, LP3971_BUCK3_BASE, }; #define LP3971_BUCK_TARGET_VOL1_REG(x) (buck_base_addr[x]) #define LP3971_BUCK_TARGET_VOL2_REG(x) (buck_base_addr[x]+1) static const unsigned int buck_voltage_map[] = { 0, 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000, 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000, 1600000, 1650000, 1700000, 1800000, 1900000, 2500000, 2800000, 3000000, 3300000, }; #define BUCK_TARGET_VOL_MASK 0x3f #define LP3971_BUCK_RAMP_REG(x) (buck_base_addr[x]+2) #define LP3971_LDO_ENABLE_REG 0x12 #define LP3971_LDO_VOL_CONTR_BASE 0x39 /* Voltage control registers: LP3971_LDO1 -> LP3971_LDO_VOL_CONTR_BASE + 0 LP3971_LDO2 -> LP3971_LDO_VOL_CONTR_BASE + 0 LP3971_LDO3 -> LP3971_LDO_VOL_CONTR_BASE + 1 LP3971_LDO4 -> LP3971_LDO_VOL_CONTR_BASE + 1 LP3971_LDO5 -> LP3971_LDO_VOL_CONTR_BASE + 2 */ #define LP3971_LDO_VOL_CONTR_REG(x) (LP3971_LDO_VOL_CONTR_BASE + (x >> 1)) /* Voltage control registers shift: LP3971_LDO1 -> 0, LP3971_LDO2 -> 4 LP3971_LDO3 -> 0, LP3971_LDO4 -> 4 LP3971_LDO5 -> 0 */ #define LDO_VOL_CONTR_SHIFT(x) ((x & 1) << 2) #define LDO_VOL_CONTR_MASK 0x0f static const unsigned int ldo45_voltage_map[] = { 1000000, 1050000, 1100000, 1150000, 1200000, 1250000, 1300000, 1350000, 1400000, 1500000, 1800000, 1900000, 2500000, 2800000, 3000000, 3300000, }; static const unsigned int ldo123_voltage_map[] = { 1800000, 1900000, 2000000, 2100000, 2200000, 2300000, 2400000, 2500000, 2600000, 2700000, 2800000, 2900000, 3000000, 3100000, 3200000, 3300000, }; #define LDO_VOL_MIN_IDX 0x00 #define LDO_VOL_MAX_IDX 0x0f static int lp3971_ldo_is_enabled(struct regulator_dev *dev) { struct lp3971 *lp3971 = rdev_get_drvdata(dev); int ldo = rdev_get_id(dev) - LP3971_LDO1; u16 mask = 1 << (1 + ldo); u16 val; val = lp3971_reg_read(lp3971, LP3971_LDO_ENABLE_REG); return (val & mask) != 0; } static int lp3971_ldo_enable(struct regulator_dev *dev) { struct lp3971 *lp3971 = rdev_get_drvdata(dev); int ldo = rdev_get_id(dev) - LP3971_LDO1; u16 mask = 1 << (1 + ldo); return lp3971_set_bits(lp3971, LP3971_LDO_ENABLE_REG, mask, mask); } static int lp3971_ldo_disable(struct regulator_dev *dev) { struct lp3971 *lp3971 = rdev_get_drvdata(dev); int ldo = rdev_get_id(dev) - LP3971_LDO1; u16 mask = 1 << (1 + ldo); return lp3971_set_bits(lp3971, LP3971_LDO_ENABLE_REG, mask, 0); } static int lp3971_ldo_get_voltage_sel(struct regulator_dev *dev) { struct lp3971 *lp3971 = rdev_get_drvdata(dev); int ldo = rdev_get_id(dev) - LP3971_LDO1; u16 val, reg; reg = lp3971_reg_read(lp3971, LP3971_LDO_VOL_CONTR_REG(ldo)); val = (reg >> LDO_VOL_CONTR_SHIFT(ldo)) & LDO_VOL_CONTR_MASK; return val; } static int lp3971_ldo_set_voltage_sel(struct regulator_dev *dev, unsigned int selector) { struct lp3971 *lp3971 = rdev_get_drvdata(dev); int ldo = rdev_get_id(dev) - LP3971_LDO1; return lp3971_set_bits(lp3971, LP3971_LDO_VOL_CONTR_REG(ldo), LDO_VOL_CONTR_MASK << LDO_VOL_CONTR_SHIFT(ldo), selector << LDO_VOL_CONTR_SHIFT(ldo)); } static struct regulator_ops lp3971_ldo_ops = { .list_voltage = regulator_list_voltage_table, .map_voltage = regulator_map_voltage_ascend, .is_enabled = lp3971_ldo_is_enabled, .enable = lp3971_ldo_enable, .disable = lp3971_ldo_disable, .get_voltage_sel = lp3971_ldo_get_voltage_sel, .set_voltage_sel = lp3971_ldo_set_voltage_sel, }; static int lp3971_dcdc_is_enabled(struct regulator_dev *dev) { struct lp3971 *lp3971 = rdev_get_drvdata(dev); int buck = rdev_get_id(dev) - LP3971_DCDC1; u16 mask = 1 << (buck * 2); u16 val; val = lp3971_reg_read(lp3971, LP3971_BUCK_VOL_ENABLE_REG); return (val & mask) != 0; } static int lp3971_dcdc_enable(struct regulator_dev *dev) { struct lp3971 *lp3971 = rdev_get_drvdata(dev); int buck = rdev_get_id(dev) - LP3971_DCDC1; u16 mask = 1 << (buck * 2); return lp3971_set_bits(lp3971, LP3971_BUCK_VOL_ENABLE_REG, mask, mask); } static int lp3971_dcdc_disable(struct regulator_dev *dev) { struct lp3971 *lp3971 = rdev_get_drvdata(dev); int buck = rdev_get_id(dev) - LP3971_DCDC1; u16 mask = 1 << (buck * 2); return lp3971_set_bits(lp3971, LP3971_BUCK_VOL_ENABLE_REG, mask, 0); } static int lp3971_dcdc_get_voltage_sel(struct regulator_dev *dev) { struct lp3971 *lp3971 = rdev_get_drvdata(dev); int buck = rdev_get_id(dev) - LP3971_DCDC1; u16 reg; reg = lp3971_reg_read(lp3971, LP3971_BUCK_TARGET_VOL1_REG(buck)); reg &= BUCK_TARGET_VOL_MASK; return reg; } static int lp3971_dcdc_set_voltage_sel(struct regulator_dev *dev, unsigned int selector) { struct lp3971 *lp3971 = rdev_get_drvdata(dev); int buck = rdev_get_id(dev) - LP3971_DCDC1; int ret; ret = lp3971_set_bits(lp3971, LP3971_BUCK_TARGET_VOL1_REG(buck), BUCK_TARGET_VOL_MASK, selector); if (ret) return ret; ret = lp3971_set_bits(lp3971, LP3971_BUCK_VOL_CHANGE_REG, BUCK_VOL_CHANGE_FLAG_MASK << BUCK_VOL_CHANGE_SHIFT(buck), BUCK_VOL_CHANGE_FLAG_GO << BUCK_VOL_CHANGE_SHIFT(buck)); if (ret) return ret; return lp3971_set_bits(lp3971, LP3971_BUCK_VOL_CHANGE_REG, BUCK_VOL_CHANGE_FLAG_MASK << BUCK_VOL_CHANGE_SHIFT(buck), 0 << BUCK_VOL_CHANGE_SHIFT(buck)); } static struct regulator_ops lp3971_dcdc_ops = { .list_voltage = regulator_list_voltage_table, .map_voltage = regulator_map_voltage_ascend, .is_enabled = lp3971_dcdc_is_enabled, .enable = lp3971_dcdc_enable, .disable = lp3971_dcdc_disable, .get_voltage_sel = lp3971_dcdc_get_voltage_sel, .set_voltage_sel = lp3971_dcdc_set_voltage_sel, }; static const struct regulator_desc regulators[] = { { .name = "LDO1", .id = LP3971_LDO1, .ops = &lp3971_ldo_ops, .n_voltages = ARRAY_SIZE(ldo123_voltage_map), .volt_table = ldo123_voltage_map, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "LDO2", .id = LP3971_LDO2, .ops = &lp3971_ldo_ops, .n_voltages = ARRAY_SIZE(ldo123_voltage_map), .volt_table = ldo123_voltage_map, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "LDO3", .id = LP3971_LDO3, .ops = &lp3971_ldo_ops, .n_voltages = ARRAY_SIZE(ldo123_voltage_map), .volt_table = ldo123_voltage_map, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "LDO4", .id = LP3971_LDO4, .ops = &lp3971_ldo_ops, .n_voltages = ARRAY_SIZE(ldo45_voltage_map), .volt_table = ldo45_voltage_map, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "LDO5", .id = LP3971_LDO5, .ops = &lp3971_ldo_ops, .n_voltages = ARRAY_SIZE(ldo45_voltage_map), .volt_table = ldo45_voltage_map, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "DCDC1", .id = LP3971_DCDC1, .ops = &lp3971_dcdc_ops, .n_voltages = ARRAY_SIZE(buck_voltage_map), .volt_table = buck_voltage_map, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "DCDC2", .id = LP3971_DCDC2, .ops = &lp3971_dcdc_ops, .n_voltages = ARRAY_SIZE(buck_voltage_map), .volt_table = buck_voltage_map, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { .name = "DCDC3", .id = LP3971_DCDC3, .ops = &lp3971_dcdc_ops, .n_voltages = ARRAY_SIZE(buck_voltage_map), .volt_table = buck_voltage_map, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, }; static int lp3971_i2c_read(struct i2c_client *i2c, char reg, int count, u16 *dest) { int ret; if (count != 1) return -EIO; ret = i2c_smbus_read_byte_data(i2c, reg); if (ret < 0) return ret; *dest = ret; return 0; } static int lp3971_i2c_write(struct i2c_client *i2c, char reg, int count, const u16 *src) { if (count != 1) return -EIO; return i2c_smbus_write_byte_data(i2c, reg, *src); } static u8 lp3971_reg_read(struct lp3971 *lp3971, u8 reg) { u16 val = 0; mutex_lock(&lp3971->io_lock); lp3971_i2c_read(lp3971->i2c, reg, 1, &val); dev_dbg(lp3971->dev, "reg read 0x%02x -> 0x%02x\n", (int)reg, (unsigned)val&0xff); mutex_unlock(&lp3971->io_lock); return val & 0xff; } static int lp3971_set_bits(struct lp3971 *lp3971, u8 reg, u16 mask, u16 val) { u16 tmp; int ret; mutex_lock(&lp3971->io_lock); ret = lp3971_i2c_read(lp3971->i2c, reg, 1, &tmp); if (ret == 0) { tmp = (tmp & ~mask) | val; ret = lp3971_i2c_write(lp3971->i2c, reg, 1, &tmp); dev_dbg(lp3971->dev, "reg write 0x%02x -> 0x%02x\n", (int)reg, (unsigned)val&0xff); } mutex_unlock(&lp3971->io_lock); return ret; } static int setup_regulators(struct lp3971 *lp3971, struct lp3971_platform_data *pdata) { int i, err; /* Instantiate the regulators */ for (i = 0; i < pdata->num_regulators; i++) { struct regulator_config config = { }; struct lp3971_regulator_subdev *reg = &pdata->regulators[i]; struct regulator_dev *rdev; config.dev = lp3971->dev; config.init_data = reg->initdata; config.driver_data = lp3971; rdev = devm_regulator_register(lp3971->dev, ®ulators[reg->id], &config); if (IS_ERR(rdev)) { err = PTR_ERR(rdev); dev_err(lp3971->dev, "regulator init failed: %d\n", err); return err; } } return 0; } static int lp3971_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct lp3971 *lp3971; struct lp3971_platform_data *pdata = dev_get_platdata(&i2c->dev); int ret; u16 val; if (!pdata) { dev_dbg(&i2c->dev, "No platform init data supplied\n"); return -ENODEV; } lp3971 = devm_kzalloc(&i2c->dev, sizeof(struct lp3971), GFP_KERNEL); if (lp3971 == NULL) return -ENOMEM; lp3971->i2c = i2c; lp3971->dev = &i2c->dev; mutex_init(&lp3971->io_lock); /* Detect LP3971 */ ret = lp3971_i2c_read(i2c, LP3971_SYS_CONTROL1_REG, 1, &val); if (ret == 0 && (val & SYS_CONTROL1_INIT_MASK) != SYS_CONTROL1_INIT_VAL) ret = -ENODEV; if (ret < 0) { dev_err(&i2c->dev, "failed to detect device\n"); return ret; } ret = setup_regulators(lp3971, pdata); if (ret < 0) return ret; i2c_set_clientdata(i2c, lp3971); return 0; } static const struct i2c_device_id lp3971_i2c_id[] = { { "lp3971", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, lp3971_i2c_id); static struct i2c_driver lp3971_i2c_driver = { .driver = { .name = "LP3971", }, .probe = lp3971_i2c_probe, .id_table = lp3971_i2c_id, }; module_i2c_driver(lp3971_i2c_driver); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Marek Szyprowski <m.szyprowski@samsung.com>"); MODULE_DESCRIPTION("LP3971 PMIC driver");
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