/* * Copyright (c) 2014 MediaTek Inc. * Author: HenryC.Chen * * 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. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define DA9212_BUCK_MODE_SLEEP 1 #define DA9212_BUCK_MODE_SYNC 2 #define DA9212_BUCK_MODE_AUTO 3 /* DA9212 REGULATOR IDs */ #define DA9212_ID_BUCKA 0 #define DA9212_ID_BUCKB 1 #define DA9212_MAX_REGULATORS 2 #define DA9212_TEST_NODE enum da9212_ramp_rate { RAMP_RATE_2P5MV, RAMP_RATE_5MV, RAMP_RATE_10MV, RAMP_RATE_20MV, }; struct da9212_pdata { struct device *dev; int num_buck; struct regulator_init_data *init_data[DA9212_MAX_REGULATORS]; int gpio_en[DA9212_MAX_REGULATORS]; int gpio_vbuck[DA9212_MAX_REGULATORS]; struct device_node *reg_node[DA9212_MAX_REGULATORS]; }; struct da9212 { struct device *dev; struct regmap *regmap; struct da9212_pdata *pdata; struct regulator_dev *rdev[DA9212_MAX_REGULATORS]; int num_regulator; }; static const struct regmap_config da9212_regmap_config = { .reg_bits = 8, .val_bits = 8, }; /* Default limits measured in millivolts and milliamps */ #define DA9212_MIN_MV 300 #define DA9212_MAX_MV 1570 #define DA9212_STEP_MV 10 #define DA9212_RAMP_DELAY 10 #define DA9212_TURN_ON_DELAY 70 /* Current limits for buck (uA) indices corresponds with register values */ static const int da9212_current_limits[] = { 2000000, 2200000, 2400000, 2600000, 2800000, 3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000, 4600000, 4800000, 5000000 }; static unsigned int da9212_buck_get_mode(struct regulator_dev *rdev) { int id = rdev_get_id(rdev); struct da9212 *chip = rdev_get_drvdata(rdev); unsigned int data; int ret, mode; ret = regmap_read(chip->regmap, DA9212_REG_BUCKA_CONF + id, &data); if (ret < 0) return ret; mode = 0; switch (data & DA9212_BUCKA_MODE_MASK) { case DA9212_BUCK_MODE_SYNC: mode = REGULATOR_MODE_FAST; break; case DA9212_BUCK_MODE_AUTO: mode = REGULATOR_MODE_NORMAL; break; case DA9212_BUCK_MODE_SLEEP: mode = REGULATOR_MODE_STANDBY; break; } return mode; } static int da9212_buck_set_mode(struct regulator_dev *rdev, unsigned int mode) { int id = rdev_get_id(rdev); struct da9212 *chip = rdev_get_drvdata(rdev); int val; val = 0; switch (mode) { case REGULATOR_MODE_FAST: val = DA9212_BUCK_MODE_SYNC; break; case REGULATOR_MODE_NORMAL: val = DA9212_BUCK_MODE_AUTO; break; case REGULATOR_MODE_STANDBY: val = DA9212_BUCK_MODE_SLEEP; break; } return regmap_update_bits(chip->regmap, DA9212_REG_BUCKA_CONF + id, 0x03, val); } static int da9212_get_current_limit(struct regulator_dev *rdev) { int id = rdev_get_id(rdev); struct da9212 *chip = rdev_get_drvdata(rdev); unsigned int data; int ret; ret = regmap_read(chip->regmap, DA9212_REG_BUCK_ILIM, &data); if (ret < 0) return ret; /* select one of 16 values: 0000 (2000mA) to 1111 (5000mA) */ data = (data >> id * 4) & 0x0F; return da9212_current_limits[data]; } static int da9212_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) { int id = rdev_get_id(rdev); unsigned int ramp_value = DA9212_RAMP_DELAY; unsigned int mask; switch (ramp_delay) { case 1 ... 2500: ramp_value = RAMP_RATE_2P5MV; break; case 2501 ... 5000: ramp_value = RAMP_RATE_5MV; break; case 5001 ... 10000: ramp_value = RAMP_RATE_10MV; break; case 10001 ... 20000: ramp_value = RAMP_RATE_20MV; break; default: return -EINVAL; } mask = id ? DA9212_SLEW_RATE_B_MASK : DA9212_SLEW_RATE_A_MASK; return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, mask, ramp_value << 6); } static struct regulator_ops da9212_buck_ops = { .get_mode = da9212_buck_get_mode, .set_mode = da9212_buck_set_mode, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, .set_voltage_sel = regulator_set_voltage_sel_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_voltage_time_sel = regulator_set_voltage_time_sel, .set_ramp_delay = da9212_set_ramp_delay, .list_voltage = regulator_list_voltage_linear, .get_current_limit = da9212_get_current_limit, }; #define DA9212_BUCK(_id) \ {\ .name = #_id,\ .ops = &da9212_buck_ops,\ .type = REGULATOR_VOLTAGE,\ .id = DA9212_ID_##_id,\ .n_voltages = (DA9212_MAX_MV - DA9212_MIN_MV) / DA9212_STEP_MV + 1,\ .min_uV = (DA9212_MIN_MV * 1000),\ .uV_step = (DA9212_STEP_MV * 1000),\ .ramp_delay = (DA9212_RAMP_DELAY * 1000), \ .enable_time = DA9212_TURN_ON_DELAY, \ .enable_reg = DA9212_REG_BUCKA_CONT + DA9212_ID_##_id,\ .enable_mask = 1,\ .vsel_reg = DA9212_REG_VBUCKA_A + DA9212_ID_##_id * 2,\ .vsel_mask = DA9212_VBUCK_MASK,\ .owner = THIS_MODULE,\ } static struct regulator_desc da9212_regulators[] = { DA9212_BUCK(BUCKA), DA9212_BUCK(BUCKB), }; static int da9212_regulator_init(struct da9212 *chip) { struct regulator_config config = { }; int i, ret; unsigned int data; ret = regmap_update_bits(chip->regmap, DA9212_REG_PAGE_CON, DA9212_REG_PAGE_MASK, DA9212_REG_PAGE2); if (ret < 0) { dev_err(chip->dev, "Failed to update PAGE reg: %d\n", ret); goto err; } ret = regmap_read(chip->regmap, DA9212_REG_INTERFACE, &data); if (ret < 0 || ((data >> 4) != 0xD)) { ret = regmap_update_bits(chip->regmap, DA9212_REG_PAGE_CON, DA9212_REG_PAGE_MASK, DA9212_REG_PAGE0); dev_err(chip->dev, "Failed to read CONTROL_E reg: %d\n", data); goto err; } chip->num_regulator = chip->pdata->num_buck; ret = regmap_update_bits(chip->regmap, DA9212_REG_PAGE_CON, DA9212_REG_PAGE_MASK, DA9212_REG_PAGE0); if (ret < 0) { dev_err(chip->dev, "Failed to update PAGE reg: %d\n", ret); goto err; } for (i = 0; i < chip->num_regulator; i++) { if (chip->pdata) config.init_data = chip->pdata->init_data[i]; config.ena_gpio = 0; /* initialize */ if (chip->pdata->gpio_en[i]) { config.ena_gpio = chip->pdata->gpio_en[i]; config.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH; } dev_err(chip->dev, "config.ena_gpio: %d\n", config.ena_gpio); config.dev = chip->dev; config.driver_data = chip; config.of_node = chip->pdata->reg_node[i]; config.regmap = chip->regmap; chip->rdev[i] = regulator_register(&da9212_regulators[i], &config); if (IS_ERR(chip->rdev[i])) { dev_err(chip->dev, "Failed to register DA9212 regulator\n"); ret = PTR_ERR(chip->rdev[i]); goto err_regulator; } } return 0; err_regulator: while (--i >= 0) regulator_unregister(chip->rdev[i]); err: return ret; } /* * I2C driver interface functions */ static const struct i2c_device_id da9212_i2c_id[] = { {"da9212-regulator", 0}, {}, }; #if defined(CONFIG_OF) static const struct of_device_id da9212_of_match[] = { {.compatible = "dlg,da9212-regulator", .data = &da9212_i2c_id[0]}, {}, }; MODULE_DEVICE_TABLE(of, da9212_of_match); static struct of_regulator_match da9212_matches[] = { [DA9212_ID_BUCKA] = {.name = "BUCKA"}, [DA9212_ID_BUCKB] = {.name = "BUCKB"}, }; static struct da9212_pdata *of_get_da9212_platform_data(struct device *dev); static struct da9212_pdata *of_get_da9212_platform_data(struct device *dev) { struct da9212_pdata *pdata; struct device_node *node; enum of_gpio_flags flags; int num, i, ret; int cnt; const struct of_device_id *match; match = of_match_device(of_match_ptr(da9212_of_match), dev); if (!match) { dev_err(dev, "Error: No device match found\n"); return NULL; } node = of_get_child_by_name(dev->of_node, "regulators"); if (!node) { dev_err(dev, "regulators node not found\n"); return NULL; } num = of_regulator_match(dev, node, da9212_matches, ARRAY_SIZE(da9212_matches)); of_node_put(node); if (num < 0) { dev_err(dev, "Failed to match regulators\n"); return NULL; } pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) return ERR_PTR(-ENOMEM); pdata->num_buck = num; cnt = 0; for (i = 0; i < ARRAY_SIZE(da9212_matches); i++) { if (!da9212_matches[i].init_data) continue; pdata->init_data[cnt] = da9212_matches[i].init_data; pdata->reg_node[cnt] = da9212_matches[cnt].of_node; ret = of_get_named_gpio_flags(da9212_matches[cnt].of_node, "vbuck-gpio", 0, &flags); if (ret >= 0) pdata->gpio_vbuck[cnt] = ret; ret = of_get_named_gpio_flags(da9212_matches[cnt].of_node, "en-gpio", 0, &flags); if (ret >= 0) pdata->gpio_en[cnt] = ret; cnt++; } dev_info(dev, "pdata->gpio_en : %d, pdata->gpio_vbuck : %d,\n", pdata->gpio_en[0], pdata->gpio_vbuck[1]); return pdata; } #else static struct da9212 *of_get_da9212_platform_data(struct device *dev) { return NULL; } #endif #ifdef DA9212_TEST_NODE unsigned int reg_value_da9212 = 0; static ssize_t show_da9212_access(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "%x\n", reg_value_da9212); } static ssize_t store_da9212_access(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { int ret = 0; char *pvalue = NULL; unsigned long reg_value = 0; unsigned long reg_address = 0; struct da9212 *chip = dev_get_drvdata(dev); strcpy(pvalue, buf); if (buf != NULL && size != 0) { if (size > 4) { ret = kstrtoul(strsep(&pvalue, " "), 16, ®_address); if (ret) return ret; ret = kstrtoul(pvalue, 16, ®_value); if (ret) return ret; ret = regmap_update_bits(chip->regmap, reg_address, 0xff, reg_value); if (ret < 0) dev_err(chip->dev, "Failed to update PAGE reg: %d\n", ret); /* restore to page 0,1 */ ret = regmap_update_bits(chip->regmap, DA9212_REG_PAGE_CON, DA9212_REG_PAGE_MASK, DA9212_REG_PAGE0); if (ret < 0) dev_err(chip->dev, "Failed to update PAGE reg: %d\n", ret); } else { ret = kstrtoul(pvalue, 16, ®_value); if (ret) return ret; ret = regmap_read(chip->regmap, reg_address, ®_value_da9212); if (ret < 0) dev_err(chip->dev, "Failed to read reg: %d\n", ret); /* restore to page 0,1 */ ret = regmap_update_bits(chip->regmap, DA9212_REG_PAGE_CON, DA9212_REG_PAGE_MASK, DA9212_REG_PAGE0); if (ret < 0) dev_err(chip->dev, "Failed to update PAGE reg: %d\n", ret); } } return size; } static ssize_t show_da9212_buck_voltage_cpu(struct device *dev, struct device_attribute *attr, char *buf) { int ret; struct regulator *reg = devm_regulator_get(dev, "VBUCKA"); if (IS_ERR(reg)) { ret = PTR_ERR(reg); dev_err(dev, "Failed to request VBUCKA: %d\n", ret); return 0; } ret = sprintf(buf, "%d\n", regulator_get_voltage(reg)); devm_regulator_put(reg); return ret; } static ssize_t store_da9212_buck_voltage_cpu(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { int ret; unsigned int reg_value = 0; struct regulator *reg = devm_regulator_get(dev, "VBUCKA"); ret = 0; if (IS_ERR(reg)) { ret = PTR_ERR(reg); dev_err(dev, "Failed to request VBUCKA: %d\n", ret); return ret; } if (buf != NULL && size != 0) { ret = kstrtou32(buf, 0, ®_value); if (ret) goto error_input; /* set voltage */ ret = regulator_set_voltage(reg, reg_value, reg_value); if (ret != 0) dev_err(dev, "Failed to set reg voltage: %d\n", reg_value); } error_input: devm_regulator_put(reg); return size; } static ssize_t show_da9212_buck_voltage_gpu(struct device *dev, struct device_attribute *attr, char *buf) { int ret; struct regulator *reg = devm_regulator_get(dev, "VBUCKB"); if (IS_ERR(reg)) { ret = PTR_ERR(reg); dev_err(dev, "Failed to request VBUCKB: %d\n", ret); return 0; } ret = sprintf(buf, "%d\n", regulator_get_voltage(reg)); devm_regulator_put(reg); return ret; } static ssize_t store_da9212_buck_voltage_gpu(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { int ret; unsigned int reg_value = 0; struct regulator *reg = devm_regulator_get(dev, "VBUCKB"); ret = 0; if (IS_ERR(reg)) { ret = PTR_ERR(reg); dev_err(dev, "Failed to request VBUCKB: %d\n", ret); return ret; } if (buf != NULL && size != 0) { ret = kstrtou32(buf, 0, ®_value); if (ret) goto error_input; /* set voltage */ ret = regulator_set_voltage(reg, reg_value, reg_value); if (ret != 0) dev_err(dev, "Failed to set reg voltage: %d\n", reg_value); } error_input: devm_regulator_put(reg); return size; } static DEVICE_ATTR(voltage_cpu, 0664, show_da9212_buck_voltage_cpu, store_da9212_buck_voltage_cpu); static DEVICE_ATTR(voltage_gpu, 0664, show_da9212_buck_voltage_gpu, store_da9212_buck_voltage_gpu); static DEVICE_ATTR(access, 0664, show_da9212_access, store_da9212_access); #endif static int da9212_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct da9212 *chip; int error, ret; chip = devm_kzalloc(&i2c->dev, sizeof(struct da9212), GFP_KERNEL); chip->dev = &i2c->dev; chip->regmap = devm_regmap_init_i2c(i2c, &da9212_regmap_config); if (IS_ERR(chip->regmap)) { error = PTR_ERR(chip->regmap); dev_err(&i2c->dev, "Failed to allocate register map: %d\n", error); return error; } i2c_set_clientdata(i2c, chip); chip->pdata = i2c->dev.platform_data; if (!chip->pdata && (i2c->dev.of_node)) chip->pdata = of_get_da9212_platform_data(chip->dev); if (!chip->pdata) { dev_err(&i2c->dev, "No platform init data supplied\n"); return -ENODEV; } ret = da9212_regulator_init(chip); if (ret < 0) { dev_err(&i2c->dev, "Failed to initialize regulator: %d\n", ret); return ret; } dev_err(&i2c->dev, "da9212_i2c_probe: done...\n"); #ifdef DA9212_TEST_NODE /* Debug sysfs */ device_create_file(&(i2c->dev), &dev_attr_voltage_cpu); device_create_file(&(i2c->dev), &dev_attr_voltage_gpu); device_create_file(&(i2c->dev), &dev_attr_access); #endif return ret; } static int da9212_i2c_remove(struct i2c_client *i2c) { struct da9212 *chip = i2c_get_clientdata(i2c); int i; for (i = 0; i < chip->num_regulator; i++) regulator_unregister(chip->rdev[i]); return 0; } MODULE_DEVICE_TABLE(i2c, da9212_i2c_id); static struct i2c_driver da9212_regulator_driver = { .driver = { .name = "da9212-regulator", .owner = THIS_MODULE, #if defined(CONFIG_OF) .of_match_table = of_match_ptr(da9212_of_match), #endif }, .probe = da9212_i2c_probe, .remove = da9212_i2c_remove, .id_table = da9212_i2c_id, }; static int __init da9212_init(void) { if (i2c_add_driver(&da9212_regulator_driver) != 0) pr_err("failed to register da9212 i2c driver.\n"); else pr_err("Success to register da9212-regulator.\n"); return 0; } subsys_initcall(da9212_init); static void __exit da9212_cleanup(void) { i2c_del_driver(&da9212_regulator_driver); } module_exit(da9212_cleanup); MODULE_DESCRIPTION("Regulator device driver for Dialog DA9212"); MODULE_LICENSE("GPL v2");