diff options
Diffstat (limited to 'drivers/regulator/tps65218-regulator.c')
| -rw-r--r-- | drivers/regulator/tps65218-regulator.c | 371 |
1 files changed, 371 insertions, 0 deletions
diff --git a/drivers/regulator/tps65218-regulator.c b/drivers/regulator/tps65218-regulator.c new file mode 100644 index 000000000..6209beee1 --- /dev/null +++ b/drivers/regulator/tps65218-regulator.c @@ -0,0 +1,371 @@ +/* + * tps65218-regulator.c + * + * Regulator driver for TPS65218 PMIC + * + * Copyright (C) 2014 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 version 2 as + * published by the Free Software Foundation. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether expressed or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License version 2 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/of_device.h> +#include <linux/regmap.h> +#include <linux/regulator/of_regulator.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> +#include <linux/mfd/tps65218.h> + +#define TPS65218_REGULATOR(_name, _of, _id, _type, _ops, _n, _vr, _vm, _er, \ + _em, _cr, _cm, _lr, _nlr, _delay, _fuv, _sr, _sm) \ + { \ + .name = _name, \ + .of_match = _of, \ + .id = _id, \ + .ops = &_ops, \ + .n_voltages = _n, \ + .type = _type, \ + .owner = THIS_MODULE, \ + .vsel_reg = _vr, \ + .vsel_mask = _vm, \ + .csel_reg = _cr, \ + .csel_mask = _cm, \ + .enable_reg = _er, \ + .enable_mask = _em, \ + .volt_table = NULL, \ + .linear_ranges = _lr, \ + .n_linear_ranges = _nlr, \ + .ramp_delay = _delay, \ + .fixed_uV = _fuv, \ + .bypass_reg = _sr, \ + .bypass_mask = _sm, \ + } \ + +static const struct regulator_linear_range dcdc1_dcdc2_ranges[] = { + REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000), + REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000), +}; + +static const struct regulator_linear_range ldo1_dcdc3_ranges[] = { + REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000), + REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000), +}; + +static const struct regulator_linear_range dcdc4_ranges[] = { + REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000), + REGULATOR_LINEAR_RANGE(1600000, 0x10, 0x34, 50000), +}; + +static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev, + unsigned selector) +{ + int ret; + struct tps65218 *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 = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask, + selector, TPS65218_PROTECT_L1); + + /* Set GO bit for DCDC1/2 to initiate voltage transistion */ + switch (rid) { + case TPS65218_DCDC_1: + case TPS65218_DCDC_2: + ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE, + TPS65218_SLEW_RATE_GO, + TPS65218_SLEW_RATE_GO, + TPS65218_PROTECT_L1); + break; + } + + return ret; +} + +static int tps65218_pmic_enable(struct regulator_dev *dev) +{ + struct tps65218 *tps = rdev_get_drvdata(dev); + int rid = rdev_get_id(dev); + + if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) + return -EINVAL; + + /* Enable the regulator and password protection is level 1 */ + return tps65218_set_bits(tps, dev->desc->enable_reg, + dev->desc->enable_mask, dev->desc->enable_mask, + TPS65218_PROTECT_L1); +} + +static int tps65218_pmic_disable(struct regulator_dev *dev) +{ + struct tps65218 *tps = rdev_get_drvdata(dev); + int rid = rdev_get_id(dev); + + if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) + return -EINVAL; + + /* Disable the regulator and password protection is level 1 */ + return tps65218_clear_bits(tps, dev->desc->enable_reg, + dev->desc->enable_mask, TPS65218_PROTECT_L1); +} + +static int tps65218_pmic_set_suspend_enable(struct regulator_dev *dev) +{ + struct tps65218 *tps = rdev_get_drvdata(dev); + unsigned int rid = rdev_get_id(dev); + + if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) + return -EINVAL; + + return tps65218_clear_bits(tps, dev->desc->bypass_reg, + dev->desc->bypass_mask, + TPS65218_PROTECT_L1); +} + +static int tps65218_pmic_set_suspend_disable(struct regulator_dev *dev) +{ + struct tps65218 *tps = rdev_get_drvdata(dev); + unsigned int rid = rdev_get_id(dev); + + if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) + return -EINVAL; + + /* + * Certain revisions of TPS65218 will need to have DCDC3 regulator + * enabled always, otherwise an immediate system reboot will occur + * during poweroff. + */ + if (rid == TPS65218_DCDC_3 && tps->rev == TPS65218_REV_2_1) + return 0; + + if (!tps->strobes[rid]) { + if (rid == TPS65218_DCDC_3) + tps->strobes[rid] = 3; + else + return -EINVAL; + } + + return tps65218_set_bits(tps, dev->desc->bypass_reg, + dev->desc->bypass_mask, + tps->strobes[rid], TPS65218_PROTECT_L1); +} + +/* Operations permitted on DCDC1, DCDC2 */ +static struct regulator_ops tps65218_dcdc12_ops = { + .is_enabled = regulator_is_enabled_regmap, + .enable = tps65218_pmic_enable, + .disable = tps65218_pmic_disable, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = tps65218_pmic_set_voltage_sel, + .list_voltage = regulator_list_voltage_linear_range, + .map_voltage = regulator_map_voltage_linear_range, + .set_voltage_time_sel = regulator_set_voltage_time_sel, + .set_suspend_enable = tps65218_pmic_set_suspend_enable, + .set_suspend_disable = tps65218_pmic_set_suspend_disable, +}; + +/* Operations permitted on DCDC3, DCDC4 and LDO1 */ +static struct regulator_ops tps65218_ldo1_dcdc34_ops = { + .is_enabled = regulator_is_enabled_regmap, + .enable = tps65218_pmic_enable, + .disable = tps65218_pmic_disable, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = tps65218_pmic_set_voltage_sel, + .list_voltage = regulator_list_voltage_linear_range, + .map_voltage = regulator_map_voltage_linear_range, + .set_suspend_enable = tps65218_pmic_set_suspend_enable, + .set_suspend_disable = tps65218_pmic_set_suspend_disable, +}; + +static const int ls3_currents[] = { 100, 200, 500, 1000 }; + +static int tps65218_pmic_set_input_current_lim(struct regulator_dev *dev, + int lim_uA) +{ + unsigned int index = 0; + unsigned int num_currents = ARRAY_SIZE(ls3_currents); + struct tps65218 *tps = rdev_get_drvdata(dev); + + while (index < num_currents && ls3_currents[index] != lim_uA) + index++; + + if (index == num_currents) + return -EINVAL; + + return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask, + index << 2, TPS65218_PROTECT_L1); +} + +static int tps65218_pmic_set_current_limit(struct regulator_dev *dev, + int min_uA, int max_uA) +{ + int index = 0; + unsigned int num_currents = ARRAY_SIZE(ls3_currents); + struct tps65218 *tps = rdev_get_drvdata(dev); + + while (index < num_currents && ls3_currents[index] < max_uA) + index++; + + index--; + + if (index < 0 || ls3_currents[index] < min_uA) + return -EINVAL; + + return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask, + index << 2, TPS65218_PROTECT_L1); +} + +static int tps65218_pmic_get_current_limit(struct regulator_dev *dev) +{ + int retval; + unsigned int index; + struct tps65218 *tps = rdev_get_drvdata(dev); + + retval = regmap_read(tps->regmap, dev->desc->csel_reg, &index); + if (retval < 0) + return retval; + + index = (index & dev->desc->csel_mask) >> 2; + + return ls3_currents[index]; +} + +static struct regulator_ops tps65218_ls3_ops = { + .is_enabled = regulator_is_enabled_regmap, + .enable = tps65218_pmic_enable, + .disable = tps65218_pmic_disable, + .set_input_current_limit = tps65218_pmic_set_input_current_lim, + .set_current_limit = tps65218_pmic_set_current_limit, + .get_current_limit = tps65218_pmic_get_current_limit, +}; + +/* Operations permitted on DCDC5, DCDC6 */ +static struct regulator_ops tps65218_dcdc56_pmic_ops = { + .is_enabled = regulator_is_enabled_regmap, + .enable = tps65218_pmic_enable, + .disable = tps65218_pmic_disable, + .set_suspend_enable = tps65218_pmic_set_suspend_enable, + .set_suspend_disable = tps65218_pmic_set_suspend_disable, +}; + +static const struct regulator_desc regulators[] = { + TPS65218_REGULATOR("DCDC1", "regulator-dcdc1", TPS65218_DCDC_1, + REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64, + TPS65218_REG_CONTROL_DCDC1, + TPS65218_CONTROL_DCDC1_MASK, TPS65218_REG_ENABLE1, + TPS65218_ENABLE1_DC1_EN, 0, 0, dcdc1_dcdc2_ranges, + 2, 4000, 0, TPS65218_REG_SEQ3, + TPS65218_SEQ3_DC1_SEQ_MASK), + TPS65218_REGULATOR("DCDC2", "regulator-dcdc2", TPS65218_DCDC_2, + REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64, + TPS65218_REG_CONTROL_DCDC2, + TPS65218_CONTROL_DCDC2_MASK, TPS65218_REG_ENABLE1, + TPS65218_ENABLE1_DC2_EN, 0, 0, dcdc1_dcdc2_ranges, + 2, 4000, 0, TPS65218_REG_SEQ3, + TPS65218_SEQ3_DC2_SEQ_MASK), + TPS65218_REGULATOR("DCDC3", "regulator-dcdc3", TPS65218_DCDC_3, + REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64, + TPS65218_REG_CONTROL_DCDC3, + TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1, + TPS65218_ENABLE1_DC3_EN, 0, 0, ldo1_dcdc3_ranges, 2, + 0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC3_SEQ_MASK), + TPS65218_REGULATOR("DCDC4", "regulator-dcdc4", TPS65218_DCDC_4, + REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 53, + TPS65218_REG_CONTROL_DCDC4, + TPS65218_CONTROL_DCDC4_MASK, TPS65218_REG_ENABLE1, + TPS65218_ENABLE1_DC4_EN, 0, 0, dcdc4_ranges, 2, + 0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC4_SEQ_MASK), + TPS65218_REGULATOR("DCDC5", "regulator-dcdc5", TPS65218_DCDC_5, + REGULATOR_VOLTAGE, tps65218_dcdc56_pmic_ops, 1, -1, + -1, TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC5_EN, 0, + 0, NULL, 0, 0, 1000000, TPS65218_REG_SEQ5, + TPS65218_SEQ5_DC5_SEQ_MASK), + TPS65218_REGULATOR("DCDC6", "regulator-dcdc6", TPS65218_DCDC_6, + REGULATOR_VOLTAGE, tps65218_dcdc56_pmic_ops, 1, -1, + -1, TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC6_EN, 0, + 0, NULL, 0, 0, 1800000, TPS65218_REG_SEQ5, + TPS65218_SEQ5_DC6_SEQ_MASK), + TPS65218_REGULATOR("LDO1", "regulator-ldo1", TPS65218_LDO_1, + REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64, + TPS65218_REG_CONTROL_LDO1, + TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2, + TPS65218_ENABLE2_LDO1_EN, 0, 0, ldo1_dcdc3_ranges, + 2, 0, 0, TPS65218_REG_SEQ6, + TPS65218_SEQ6_LDO1_SEQ_MASK), + TPS65218_REGULATOR("LS3", "regulator-ls3", TPS65218_LS_3, + REGULATOR_CURRENT, tps65218_ls3_ops, 0, 0, 0, + TPS65218_REG_ENABLE2, TPS65218_ENABLE2_LS3_EN, + TPS65218_REG_CONFIG2, TPS65218_CONFIG2_LS3ILIM_MASK, + NULL, 0, 0, 0, 0, 0), +}; + +static int tps65218_regulator_probe(struct platform_device *pdev) +{ + struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent); + struct regulator_dev *rdev; + struct regulator_config config = { }; + int i, ret; + unsigned int val; + + config.dev = &pdev->dev; + config.dev->of_node = tps->dev->of_node; + config.driver_data = tps; + config.regmap = tps->regmap; + + /* Allocate memory for strobes */ + tps->strobes = devm_kcalloc(&pdev->dev, + TPS65218_NUM_REGULATOR, sizeof(u8), + GFP_KERNEL); + if (!tps->strobes) + return -ENOMEM; + + for (i = 0; i < ARRAY_SIZE(regulators); i++) { + rdev = devm_regulator_register(&pdev->dev, ®ulators[i], + &config); + if (IS_ERR(rdev)) { + dev_err(tps->dev, "failed to register %s regulator\n", + pdev->name); + return PTR_ERR(rdev); + } + + ret = regmap_read(tps->regmap, regulators[i].bypass_reg, &val); + if (ret) + return ret; + + tps->strobes[i] = val & regulators[i].bypass_mask; + } + + return 0; +} + +static const struct platform_device_id tps65218_regulator_id_table[] = { + { "tps65218-regulator", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(platform, tps65218_regulator_id_table); + +static struct platform_driver tps65218_regulator_driver = { + .driver = { + .name = "tps65218-pmic", + }, + .probe = tps65218_regulator_probe, + .id_table = tps65218_regulator_id_table, +}; + +module_platform_driver(tps65218_regulator_driver); + +MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); +MODULE_DESCRIPTION("TPS65218 voltage regulator driver"); +MODULE_ALIAS("platform:tps65218-pmic"); +MODULE_LICENSE("GPL v2"); |