diff options
Diffstat (limited to 'drivers/regulator/tps65217-regulator.c')
| -rw-r--r-- | drivers/regulator/tps65217-regulator.c | 436 |
1 files changed, 436 insertions, 0 deletions
diff --git a/drivers/regulator/tps65217-regulator.c b/drivers/regulator/tps65217-regulator.c new file mode 100644 index 0000000..df39518 --- /dev/null +++ b/drivers/regulator/tps65217-regulator.c @@ -0,0 +1,436 @@ +/* + * tps65217-regulator.c + * + * Regulator driver for TPS65217 PMIC + * + * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/ + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/device.h> +#include <linux/init.h> +#include <linux/err.h> +#include <linux/platform_device.h> + +#include <linux/regulator/of_regulator.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> +#include <linux/mfd/tps65217.h> + +#define TPS65217_REGULATOR(_name, _id, _ops, _n, _vr, _vm, _em, _t) \ + { \ + .name = _name, \ + .id = _id, \ + .ops = &_ops, \ + .n_voltages = _n, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .vsel_reg = _vr, \ + .vsel_mask = _vm, \ + .enable_reg = TPS65217_REG_ENABLE, \ + .enable_mask = _em, \ + .volt_table = _t, \ + } \ + +#define TPS65217_INFO(_nm, _min, _max, _f1, _f2) \ + { \ + .name = _nm, \ + .min_uV = _min, \ + .max_uV = _max, \ + .vsel_to_uv = _f1, \ + .uv_to_vsel = _f2, \ + } + +static const unsigned int LDO1_VSEL_table[] = { + 1000000, 1100000, 1200000, 1250000, + 1300000, 1350000, 1400000, 1500000, + 1600000, 1800000, 2500000, 2750000, + 2800000, 3000000, 3100000, 3300000, +}; + +static int tps65217_vsel_to_uv1(unsigned int vsel) +{ + int uV = 0; + + if (vsel > 63) + return -EINVAL; + + if (vsel <= 24) + uV = vsel * 25000 + 900000; + else if (vsel <= 52) + uV = (vsel - 24) * 50000 + 1500000; + else if (vsel < 56) + uV = (vsel - 52) * 100000 + 2900000; + else + uV = 3300000; + + return uV; +} + +static int tps65217_uv_to_vsel1(int uV, unsigned int *vsel) +{ + if (uV < 0 || uV > 3300000) + return -EINVAL; + + if (uV <= 1500000) + *vsel = DIV_ROUND_UP(uV - 900000, 25000); + else if (uV <= 2900000) + *vsel = 24 + DIV_ROUND_UP(uV - 1500000, 50000); + else if (uV < 3300000) + *vsel = 52 + DIV_ROUND_UP(uV - 2900000, 100000); + else + *vsel = 56; + + return 0; +} + +static int tps65217_vsel_to_uv2(unsigned int vsel) +{ + int uV = 0; + + if (vsel > 31) + return -EINVAL; + + if (vsel <= 8) + uV = vsel * 50000 + 1500000; + else if (vsel <= 13) + uV = (vsel - 8) * 100000 + 1900000; + else + uV = (vsel - 13) * 50000 + 2400000; + + return uV; +} + +static int tps65217_uv_to_vsel2(int uV, unsigned int *vsel) +{ + if (uV < 0 || uV > 3300000) + return -EINVAL; + + if (uV <= 1900000) + *vsel = DIV_ROUND_UP(uV - 1500000, 50000); + else if (uV <= 2400000) + *vsel = 8 + DIV_ROUND_UP(uV - 1900000, 100000); + else + *vsel = 13 + DIV_ROUND_UP(uV - 2400000, 50000); + + return 0; +} + +static struct tps_info tps65217_pmic_regs[] = { + TPS65217_INFO("DCDC1", 900000, 1800000, tps65217_vsel_to_uv1, + tps65217_uv_to_vsel1), + TPS65217_INFO("DCDC2", 900000, 3300000, tps65217_vsel_to_uv1, + tps65217_uv_to_vsel1), + TPS65217_INFO("DCDC3", 900000, 1500000, tps65217_vsel_to_uv1, + tps65217_uv_to_vsel1), + TPS65217_INFO("LDO1", 1000000, 3300000, NULL, NULL), + TPS65217_INFO("LDO2", 900000, 3300000, tps65217_vsel_to_uv1, + tps65217_uv_to_vsel1), + TPS65217_INFO("LDO3", 1800000, 3300000, tps65217_vsel_to_uv2, + tps65217_uv_to_vsel2), + TPS65217_INFO("LDO4", 1800000, 3300000, tps65217_vsel_to_uv2, + tps65217_uv_to_vsel2), +}; + +static int tps65217_pmic_enable(struct regulator_dev *dev) +{ + struct tps65217 *tps = rdev_get_drvdata(dev); + unsigned int rid = rdev_get_id(dev); + + if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) + return -EINVAL; + + /* Enable the regulator and password protection is level 1 */ + return tps65217_set_bits(tps, TPS65217_REG_ENABLE, + dev->desc->enable_mask, dev->desc->enable_mask, + TPS65217_PROTECT_L1); +} + +static int tps65217_pmic_disable(struct regulator_dev *dev) +{ + struct tps65217 *tps = rdev_get_drvdata(dev); + unsigned int rid = rdev_get_id(dev); + + if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) + return -EINVAL; + + /* Disable the regulator and password protection is level 1 */ + return tps65217_clear_bits(tps, TPS65217_REG_ENABLE, + dev->desc->enable_mask, TPS65217_PROTECT_L1); +} + +static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev, + unsigned selector) +{ + int ret; + struct tps65217 *tps = rdev_get_drvdata(dev); + unsigned int rid = rdev_get_id(dev); + + /* Set the voltage based on vsel value and write protect level is 2 */ + ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask, + selector, TPS65217_PROTECT_L2); + + /* Set GO bit for DCDCx to initiate voltage transistion */ + switch (rid) { + case TPS65217_DCDC_1 ... TPS65217_DCDC_3: + ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW, + TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO, + TPS65217_PROTECT_L2); + break; + } + + return ret; +} + +static int tps65217_pmic_map_voltage(struct regulator_dev *dev, + int min_uV, int max_uV) +{ + + struct tps65217 *tps = rdev_get_drvdata(dev); + unsigned int sel, rid = rdev_get_id(dev); + int ret; + + /* LDO1 uses regulator_map_voltage_iterate() */ + if (rid == TPS65217_LDO_1) + return -EINVAL; + + if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) + return -EINVAL; + + if (min_uV < tps->info[rid]->min_uV) + min_uV = tps->info[rid]->min_uV; + + if (max_uV < tps->info[rid]->min_uV || min_uV > tps->info[rid]->max_uV) + return -EINVAL; + + ret = tps->info[rid]->uv_to_vsel(min_uV, &sel); + if (ret) + return ret; + + return sel; +} + +static int tps65217_pmic_list_voltage(struct regulator_dev *dev, + unsigned selector) +{ + struct tps65217 *tps = rdev_get_drvdata(dev); + unsigned int rid = rdev_get_id(dev); + + if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) + return -EINVAL; + + if (selector >= dev->desc->n_voltages) + return -EINVAL; + + return tps->info[rid]->vsel_to_uv(selector); +} + +/* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */ +static struct regulator_ops tps65217_pmic_ops = { + .is_enabled = regulator_is_enabled_regmap, + .enable = tps65217_pmic_enable, + .disable = tps65217_pmic_disable, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = tps65217_pmic_set_voltage_sel, + .list_voltage = tps65217_pmic_list_voltage, + .map_voltage = tps65217_pmic_map_voltage, +}; + +/* Operations permitted on LDO1 */ +static struct regulator_ops tps65217_pmic_ldo1_ops = { + .is_enabled = regulator_is_enabled_regmap, + .enable = tps65217_pmic_enable, + .disable = tps65217_pmic_disable, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = tps65217_pmic_set_voltage_sel, + .list_voltage = regulator_list_voltage_table, +}; + +static const struct regulator_desc regulators[] = { + TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, tps65217_pmic_ops, 64, + TPS65217_REG_DEFDCDC1, TPS65217_DEFDCDCX_DCDC_MASK, + TPS65217_ENABLE_DC1_EN, NULL), + TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, tps65217_pmic_ops, 64, + TPS65217_REG_DEFDCDC2, TPS65217_DEFDCDCX_DCDC_MASK, + TPS65217_ENABLE_DC2_EN, NULL), + TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, tps65217_pmic_ops, 64, + TPS65217_REG_DEFDCDC3, TPS65217_DEFDCDCX_DCDC_MASK, + TPS65217_ENABLE_DC3_EN, NULL), + TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, tps65217_pmic_ldo1_ops, 16, + TPS65217_REG_DEFLDO1, TPS65217_DEFLDO1_LDO1_MASK, + TPS65217_ENABLE_LDO1_EN, LDO1_VSEL_table), + TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, tps65217_pmic_ops, 64, + TPS65217_REG_DEFLDO2, TPS65217_DEFLDO2_LDO2_MASK, + TPS65217_ENABLE_LDO2_EN, NULL), + TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, tps65217_pmic_ops, 32, + TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK, + TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN, + NULL), + TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, tps65217_pmic_ops, 32, + TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK, + TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN, + NULL), +}; + +#ifdef CONFIG_OF +static struct of_regulator_match reg_matches[] = { + { .name = "dcdc1", .driver_data = (void *)TPS65217_DCDC_1 }, + { .name = "dcdc2", .driver_data = (void *)TPS65217_DCDC_2 }, + { .name = "dcdc3", .driver_data = (void *)TPS65217_DCDC_3 }, + { .name = "ldo1", .driver_data = (void *)TPS65217_LDO_1 }, + { .name = "ldo2", .driver_data = (void *)TPS65217_LDO_2 }, + { .name = "ldo3", .driver_data = (void *)TPS65217_LDO_3 }, + { .name = "ldo4", .driver_data = (void *)TPS65217_LDO_4 }, +}; + +static struct tps65217_board *tps65217_parse_dt(struct platform_device *pdev) +{ + struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent); + struct device_node *node = tps->dev->of_node; + struct tps65217_board *pdata; + struct device_node *regs; + int i, count; + + regs = of_find_node_by_name(node, "regulators"); + if (!regs) + return NULL; + + count = of_regulator_match(&pdev->dev, regs, reg_matches, + TPS65217_NUM_REGULATOR); + of_node_put(regs); + if ((count < 0) || (count > TPS65217_NUM_REGULATOR)) + return NULL; + + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return NULL; + + for (i = 0; i < count; i++) { + if (!reg_matches[i].init_data || !reg_matches[i].of_node) + continue; + + pdata->tps65217_init_data[i] = reg_matches[i].init_data; + pdata->of_node[i] = reg_matches[i].of_node; + } + + return pdata; +} +#else +static struct tps65217_board *tps65217_parse_dt(struct platform_device *pdev) +{ + return NULL; +} +#endif + +static int tps65217_regulator_probe(struct platform_device *pdev) +{ + struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent); + struct tps65217_board *pdata = dev_get_platdata(tps->dev); + struct regulator_init_data *reg_data; + struct regulator_dev *rdev; + struct regulator_config config = { }; + int i, ret; + + if (tps->dev->of_node) + pdata = tps65217_parse_dt(pdev); + + if (!pdata) { + dev_err(&pdev->dev, "Platform data not found\n"); + return -EINVAL; + } + + if (tps65217_chip_id(tps) != TPS65217) { + dev_err(&pdev->dev, "Invalid tps chip version\n"); + return -ENODEV; + } + + platform_set_drvdata(pdev, tps); + + for (i = 0; i < TPS65217_NUM_REGULATOR; i++) { + + reg_data = pdata->tps65217_init_data[i]; + + /* + * Regulator API handles empty constraints but not NULL + * constraints + */ + if (!reg_data) + continue; + + /* Register the regulators */ + tps->info[i] = &tps65217_pmic_regs[i]; + + config.dev = tps->dev; + config.init_data = reg_data; + config.driver_data = tps; + config.regmap = tps->regmap; + if (tps->dev->of_node) + config.of_node = pdata->of_node[i]; + + rdev = regulator_register(®ulators[i], &config); + if (IS_ERR(rdev)) { + dev_err(tps->dev, "failed to register %s regulator\n", + pdev->name); + ret = PTR_ERR(rdev); + goto err_unregister_regulator; + } + + /* Save regulator for cleanup */ + tps->rdev[i] = rdev; + } + return 0; + +err_unregister_regulator: + while (--i >= 0) + regulator_unregister(tps->rdev[i]); + + return ret; +} + +static int tps65217_regulator_remove(struct platform_device *pdev) +{ + struct tps65217 *tps = platform_get_drvdata(pdev); + unsigned int i; + + for (i = 0; i < TPS65217_NUM_REGULATOR; i++) + regulator_unregister(tps->rdev[i]); + + platform_set_drvdata(pdev, NULL); + + return 0; +} + +static struct platform_driver tps65217_regulator_driver = { + .driver = { + .name = "tps65217-pmic", + }, + .probe = tps65217_regulator_probe, + .remove = tps65217_regulator_remove, +}; + +static int __init tps65217_regulator_init(void) +{ + return platform_driver_register(&tps65217_regulator_driver); +} +subsys_initcall(tps65217_regulator_init); + +static void __exit tps65217_regulator_exit(void) +{ + platform_driver_unregister(&tps65217_regulator_driver); +} +module_exit(tps65217_regulator_exit); + +MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>"); +MODULE_DESCRIPTION("TPS65217 voltage regulator driver"); +MODULE_ALIAS("platform:tps65217-pmic"); +MODULE_LICENSE("GPL v2"); |