| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Haojian Zhuang | 901 | 77.07% | 2 | 9.52% |
| Jonghwan Choi | 119 | 10.18% | 1 | 4.76% |
| Axel Lin | 98 | 8.38% | 10 | 47.62% |
| Mark Brown | 28 | 2.40% | 1 | 4.76% |
| Krzysztof Kozlowski | 7 | 0.60% | 2 | 9.52% |
| Sachin Kamat | 6 | 0.51% | 1 | 4.76% |
| Jingoo Han | 4 | 0.34% | 1 | 4.76% |
| Tejun Heo | 3 | 0.26% | 1 | 4.76% |
| Thomas Gleixner | 2 | 0.17% | 1 | 4.76% |
| Rajendra Nayak | 1 | 0.09% | 1 | 4.76% |
| Total | 1169 | 21 |
// SPDX-License-Identifier: GPL-2.0-only /* * Regulators driver for Maxim max8649 * * Copyright (C) 2009-2010 Marvell International Ltd. * Haojian Zhuang <haojian.zhuang@marvell.com> */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/err.h> #include <linux/i2c.h> #include <linux/platform_device.h> #include <linux/regulator/driver.h> #include <linux/slab.h> #include <linux/regulator/max8649.h> #include <linux/regmap.h> #define MAX8649_DCDC_VMIN 750000 /* uV */ #define MAX8649_DCDC_VMAX 1380000 /* uV */ #define MAX8649_DCDC_STEP 10000 /* uV */ #define MAX8649_VOL_MASK 0x3f /* Registers */ #define MAX8649_MODE0 0x00 #define MAX8649_MODE1 0x01 #define MAX8649_MODE2 0x02 #define MAX8649_MODE3 0x03 #define MAX8649_CONTROL 0x04 #define MAX8649_SYNC 0x05 #define MAX8649_RAMP 0x06 #define MAX8649_CHIP_ID1 0x08 #define MAX8649_CHIP_ID2 0x09 /* Bits */ #define MAX8649_EN_PD (1 << 7) #define MAX8649_VID0_PD (1 << 6) #define MAX8649_VID1_PD (1 << 5) #define MAX8649_VID_MASK (3 << 5) #define MAX8649_FORCE_PWM (1 << 7) #define MAX8649_SYNC_EXTCLK (1 << 6) #define MAX8649_EXT_MASK (3 << 6) #define MAX8649_RAMP_MASK (7 << 5) #define MAX8649_RAMP_DOWN (1 << 1) struct max8649_regulator_info { struct device *dev; struct regmap *regmap; unsigned mode:2; /* bit[1:0] = VID1, VID0 */ unsigned extclk_freq:2; unsigned extclk:1; unsigned ramp_timing:3; unsigned ramp_down:1; }; static int max8649_enable_time(struct regulator_dev *rdev) { struct max8649_regulator_info *info = rdev_get_drvdata(rdev); int voltage, rate, ret; unsigned int val; /* get voltage */ ret = regmap_read(info->regmap, rdev->desc->vsel_reg, &val); if (ret != 0) return ret; val &= MAX8649_VOL_MASK; voltage = regulator_list_voltage_linear(rdev, (unsigned char)val); /* get rate */ ret = regmap_read(info->regmap, MAX8649_RAMP, &val); if (ret != 0) return ret; ret = (val & MAX8649_RAMP_MASK) >> 5; rate = (32 * 1000) >> ret; /* uV/uS */ return DIV_ROUND_UP(voltage, rate); } static int max8649_set_mode(struct regulator_dev *rdev, unsigned int mode) { struct max8649_regulator_info *info = rdev_get_drvdata(rdev); switch (mode) { case REGULATOR_MODE_FAST: regmap_update_bits(info->regmap, rdev->desc->vsel_reg, MAX8649_FORCE_PWM, MAX8649_FORCE_PWM); break; case REGULATOR_MODE_NORMAL: regmap_update_bits(info->regmap, rdev->desc->vsel_reg, MAX8649_FORCE_PWM, 0); break; default: return -EINVAL; } return 0; } static unsigned int max8649_get_mode(struct regulator_dev *rdev) { struct max8649_regulator_info *info = rdev_get_drvdata(rdev); unsigned int val; int ret; ret = regmap_read(info->regmap, rdev->desc->vsel_reg, &val); if (ret != 0) return ret; if (val & MAX8649_FORCE_PWM) return REGULATOR_MODE_FAST; return REGULATOR_MODE_NORMAL; } static const struct regulator_ops max8649_dcdc_ops = { .set_voltage_sel = regulator_set_voltage_sel_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, .list_voltage = regulator_list_voltage_linear, .map_voltage = regulator_map_voltage_linear, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, .enable_time = max8649_enable_time, .set_mode = max8649_set_mode, .get_mode = max8649_get_mode, }; static struct regulator_desc dcdc_desc = { .name = "max8649", .ops = &max8649_dcdc_ops, .type = REGULATOR_VOLTAGE, .n_voltages = 1 << 6, .owner = THIS_MODULE, .vsel_mask = MAX8649_VOL_MASK, .min_uV = MAX8649_DCDC_VMIN, .uV_step = MAX8649_DCDC_STEP, .enable_reg = MAX8649_CONTROL, .enable_mask = MAX8649_EN_PD, .enable_is_inverted = true, }; static const struct regmap_config max8649_regmap_config = { .reg_bits = 8, .val_bits = 8, }; static int max8649_regulator_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct max8649_platform_data *pdata = dev_get_platdata(&client->dev); struct max8649_regulator_info *info = NULL; struct regulator_dev *regulator; struct regulator_config config = { }; unsigned int val; unsigned char data; int ret; info = devm_kzalloc(&client->dev, sizeof(struct max8649_regulator_info), GFP_KERNEL); if (!info) return -ENOMEM; info->regmap = devm_regmap_init_i2c(client, &max8649_regmap_config); if (IS_ERR(info->regmap)) { ret = PTR_ERR(info->regmap); dev_err(&client->dev, "Failed to allocate register map: %d\n", ret); return ret; } info->dev = &client->dev; i2c_set_clientdata(client, info); info->mode = pdata->mode; switch (info->mode) { case 0: dcdc_desc.vsel_reg = MAX8649_MODE0; break; case 1: dcdc_desc.vsel_reg = MAX8649_MODE1; break; case 2: dcdc_desc.vsel_reg = MAX8649_MODE2; break; case 3: dcdc_desc.vsel_reg = MAX8649_MODE3; break; default: break; } ret = regmap_read(info->regmap, MAX8649_CHIP_ID1, &val); if (ret != 0) { dev_err(info->dev, "Failed to detect ID of MAX8649:%d\n", ret); return ret; } dev_info(info->dev, "Detected MAX8649 (ID:%x)\n", val); /* enable VID0 & VID1 */ regmap_update_bits(info->regmap, MAX8649_CONTROL, MAX8649_VID_MASK, 0); /* enable/disable external clock synchronization */ info->extclk = pdata->extclk; data = (info->extclk) ? MAX8649_SYNC_EXTCLK : 0; regmap_update_bits(info->regmap, dcdc_desc.vsel_reg, MAX8649_SYNC_EXTCLK, data); if (info->extclk) { /* set external clock frequency */ info->extclk_freq = pdata->extclk_freq; regmap_update_bits(info->regmap, MAX8649_SYNC, MAX8649_EXT_MASK, info->extclk_freq << 6); } if (pdata->ramp_timing) { info->ramp_timing = pdata->ramp_timing; regmap_update_bits(info->regmap, MAX8649_RAMP, MAX8649_RAMP_MASK, info->ramp_timing << 5); } info->ramp_down = pdata->ramp_down; if (info->ramp_down) { regmap_update_bits(info->regmap, MAX8649_RAMP, MAX8649_RAMP_DOWN, MAX8649_RAMP_DOWN); } config.dev = &client->dev; config.init_data = pdata->regulator; config.driver_data = info; config.regmap = info->regmap; regulator = devm_regulator_register(&client->dev, &dcdc_desc, &config); if (IS_ERR(regulator)) { dev_err(info->dev, "failed to register regulator %s\n", dcdc_desc.name); return PTR_ERR(regulator); } return 0; } static const struct i2c_device_id max8649_id[] = { { "max8649", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, max8649_id); static struct i2c_driver max8649_driver = { .probe = max8649_regulator_probe, .driver = { .name = "max8649", }, .id_table = max8649_id, }; static int __init max8649_init(void) { return i2c_add_driver(&max8649_driver); } subsys_initcall(max8649_init); static void __exit max8649_exit(void) { i2c_del_driver(&max8649_driver); } module_exit(max8649_exit); /* Module information */ MODULE_DESCRIPTION("MAXIM 8649 voltage regulator driver"); MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>"); MODULE_LICENSE("GPL");
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