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370 lines
12 KiB
370 lines
12 KiB
/* |
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* tps65218-regulator.c |
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* |
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* Regulator driver for TPS65218 PMIC |
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* |
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* Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com/ |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation. |
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* |
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any |
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* kind, whether expressed or implied; without even the implied warranty |
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License version 2 for more details. |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/device.h> |
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#include <linux/init.h> |
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#include <linux/err.h> |
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#include <linux/platform_device.h> |
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#include <linux/of_device.h> |
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#include <linux/regmap.h> |
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#include <linux/regulator/of_regulator.h> |
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#include <linux/regulator/driver.h> |
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#include <linux/regulator/machine.h> |
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#include <linux/mfd/tps65218.h> |
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#define TPS65218_REGULATOR(_name, _of, _id, _type, _ops, _n, _vr, _vm, _er, \ |
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_em, _cr, _cm, _lr, _nlr, _delay, _fuv, _sr, _sm, \ |
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_ct, _ncl) \ |
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{ \ |
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.name = _name, \ |
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.of_match = _of, \ |
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.id = _id, \ |
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.ops = &_ops, \ |
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.n_voltages = _n, \ |
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.type = _type, \ |
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.owner = THIS_MODULE, \ |
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.vsel_reg = _vr, \ |
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.vsel_mask = _vm, \ |
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.csel_reg = _cr, \ |
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.csel_mask = _cm, \ |
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.curr_table = _ct, \ |
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.n_current_limits = _ncl, \ |
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.enable_reg = _er, \ |
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.enable_mask = _em, \ |
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.volt_table = NULL, \ |
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.linear_ranges = _lr, \ |
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.n_linear_ranges = _nlr, \ |
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.ramp_delay = _delay, \ |
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.fixed_uV = _fuv, \ |
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.bypass_reg = _sr, \ |
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.bypass_mask = _sm, \ |
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} \ |
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static const struct linear_range dcdc1_dcdc2_ranges[] = { |
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REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000), |
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REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000), |
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}; |
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static const struct linear_range ldo1_dcdc3_ranges[] = { |
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REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000), |
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REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000), |
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}; |
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static const struct linear_range dcdc4_ranges[] = { |
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REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000), |
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REGULATOR_LINEAR_RANGE(1600000, 0x10, 0x34, 50000), |
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}; |
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static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev, |
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unsigned selector) |
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{ |
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int ret; |
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struct tps65218 *tps = rdev_get_drvdata(dev); |
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unsigned int rid = rdev_get_id(dev); |
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/* Set the voltage based on vsel value and write protect level is 2 */ |
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ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask, |
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selector, TPS65218_PROTECT_L1); |
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/* Set GO bit for DCDC1/2 to initiate voltage transistion */ |
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switch (rid) { |
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case TPS65218_DCDC_1: |
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case TPS65218_DCDC_2: |
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ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE, |
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TPS65218_SLEW_RATE_GO, |
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TPS65218_SLEW_RATE_GO, |
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TPS65218_PROTECT_L1); |
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break; |
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} |
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return ret; |
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} |
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static int tps65218_pmic_enable(struct regulator_dev *dev) |
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{ |
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struct tps65218 *tps = rdev_get_drvdata(dev); |
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int rid = rdev_get_id(dev); |
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if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) |
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return -EINVAL; |
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/* Enable the regulator and password protection is level 1 */ |
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return tps65218_set_bits(tps, dev->desc->enable_reg, |
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dev->desc->enable_mask, dev->desc->enable_mask, |
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TPS65218_PROTECT_L1); |
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} |
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static int tps65218_pmic_disable(struct regulator_dev *dev) |
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{ |
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struct tps65218 *tps = rdev_get_drvdata(dev); |
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int rid = rdev_get_id(dev); |
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if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) |
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return -EINVAL; |
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/* Disable the regulator and password protection is level 1 */ |
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return tps65218_clear_bits(tps, dev->desc->enable_reg, |
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dev->desc->enable_mask, TPS65218_PROTECT_L1); |
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} |
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static int tps65218_pmic_set_suspend_enable(struct regulator_dev *dev) |
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{ |
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struct tps65218 *tps = rdev_get_drvdata(dev); |
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unsigned int rid = rdev_get_id(dev); |
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if (rid > TPS65218_LDO_1) |
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return -EINVAL; |
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return tps65218_clear_bits(tps, dev->desc->bypass_reg, |
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dev->desc->bypass_mask, |
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TPS65218_PROTECT_L1); |
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} |
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static int tps65218_pmic_set_suspend_disable(struct regulator_dev *dev) |
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{ |
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struct tps65218 *tps = rdev_get_drvdata(dev); |
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unsigned int rid = rdev_get_id(dev); |
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if (rid > TPS65218_LDO_1) |
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return -EINVAL; |
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/* |
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* Certain revisions of TPS65218 will need to have DCDC3 regulator |
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* enabled always, otherwise an immediate system reboot will occur |
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* during poweroff. |
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*/ |
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if (rid == TPS65218_DCDC_3 && tps->rev == TPS65218_REV_2_1) |
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return 0; |
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if (!tps->strobes[rid]) { |
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if (rid == TPS65218_DCDC_3) |
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tps->strobes[rid] = 3; |
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else |
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return -EINVAL; |
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} |
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return tps65218_set_bits(tps, dev->desc->bypass_reg, |
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dev->desc->bypass_mask, |
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tps->strobes[rid], TPS65218_PROTECT_L1); |
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} |
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/* Operations permitted on DCDC1, DCDC2 */ |
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static const struct regulator_ops tps65218_dcdc12_ops = { |
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.is_enabled = regulator_is_enabled_regmap, |
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.enable = tps65218_pmic_enable, |
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.disable = tps65218_pmic_disable, |
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.get_voltage_sel = regulator_get_voltage_sel_regmap, |
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.set_voltage_sel = tps65218_pmic_set_voltage_sel, |
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.list_voltage = regulator_list_voltage_linear_range, |
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.map_voltage = regulator_map_voltage_linear_range, |
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.set_voltage_time_sel = regulator_set_voltage_time_sel, |
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.set_suspend_enable = tps65218_pmic_set_suspend_enable, |
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.set_suspend_disable = tps65218_pmic_set_suspend_disable, |
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}; |
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/* Operations permitted on DCDC3, DCDC4 and LDO1 */ |
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static const struct regulator_ops tps65218_ldo1_dcdc34_ops = { |
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.is_enabled = regulator_is_enabled_regmap, |
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.enable = tps65218_pmic_enable, |
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.disable = tps65218_pmic_disable, |
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.get_voltage_sel = regulator_get_voltage_sel_regmap, |
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.set_voltage_sel = tps65218_pmic_set_voltage_sel, |
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.list_voltage = regulator_list_voltage_linear_range, |
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.map_voltage = regulator_map_voltage_linear_range, |
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.set_suspend_enable = tps65218_pmic_set_suspend_enable, |
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.set_suspend_disable = tps65218_pmic_set_suspend_disable, |
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}; |
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static const unsigned int ls3_currents[] = { 100000, 200000, 500000, 1000000 }; |
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static int tps65218_pmic_set_input_current_lim(struct regulator_dev *dev, |
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int lim_uA) |
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{ |
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unsigned int index = 0; |
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unsigned int num_currents = ARRAY_SIZE(ls3_currents); |
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struct tps65218 *tps = rdev_get_drvdata(dev); |
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while (index < num_currents && ls3_currents[index] != lim_uA) |
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index++; |
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if (index == num_currents) |
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return -EINVAL; |
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return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask, |
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index << __builtin_ctz(dev->desc->csel_mask), |
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TPS65218_PROTECT_L1); |
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} |
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static int tps65218_pmic_set_current_limit(struct regulator_dev *dev, |
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int min_uA, int max_uA) |
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{ |
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int index = 0; |
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unsigned int num_currents = ARRAY_SIZE(ls3_currents); |
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struct tps65218 *tps = rdev_get_drvdata(dev); |
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while (index < num_currents && ls3_currents[index] <= max_uA) |
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index++; |
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index--; |
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if (index < 0 || ls3_currents[index] < min_uA) |
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return -EINVAL; |
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return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask, |
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index << __builtin_ctz(dev->desc->csel_mask), |
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TPS65218_PROTECT_L1); |
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} |
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static const struct regulator_ops tps65218_ls23_ops = { |
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.is_enabled = regulator_is_enabled_regmap, |
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.enable = tps65218_pmic_enable, |
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.disable = tps65218_pmic_disable, |
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.set_input_current_limit = tps65218_pmic_set_input_current_lim, |
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.set_current_limit = tps65218_pmic_set_current_limit, |
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.get_current_limit = regulator_get_current_limit_regmap, |
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}; |
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/* Operations permitted on DCDC5, DCDC6 */ |
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static const struct regulator_ops tps65218_dcdc56_pmic_ops = { |
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.is_enabled = regulator_is_enabled_regmap, |
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.enable = tps65218_pmic_enable, |
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.disable = tps65218_pmic_disable, |
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.set_suspend_enable = tps65218_pmic_set_suspend_enable, |
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.set_suspend_disable = tps65218_pmic_set_suspend_disable, |
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}; |
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static const struct regulator_desc regulators[] = { |
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TPS65218_REGULATOR("DCDC1", "regulator-dcdc1", TPS65218_DCDC_1, |
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REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64, |
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TPS65218_REG_CONTROL_DCDC1, |
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TPS65218_CONTROL_DCDC1_MASK, TPS65218_REG_ENABLE1, |
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TPS65218_ENABLE1_DC1_EN, 0, 0, dcdc1_dcdc2_ranges, |
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2, 4000, 0, TPS65218_REG_SEQ3, |
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TPS65218_SEQ3_DC1_SEQ_MASK, NULL, 0), |
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TPS65218_REGULATOR("DCDC2", "regulator-dcdc2", TPS65218_DCDC_2, |
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REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64, |
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TPS65218_REG_CONTROL_DCDC2, |
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TPS65218_CONTROL_DCDC2_MASK, TPS65218_REG_ENABLE1, |
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TPS65218_ENABLE1_DC2_EN, 0, 0, dcdc1_dcdc2_ranges, |
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2, 4000, 0, TPS65218_REG_SEQ3, |
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TPS65218_SEQ3_DC2_SEQ_MASK, NULL, 0), |
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TPS65218_REGULATOR("DCDC3", "regulator-dcdc3", TPS65218_DCDC_3, |
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REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64, |
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TPS65218_REG_CONTROL_DCDC3, |
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TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1, |
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TPS65218_ENABLE1_DC3_EN, 0, 0, ldo1_dcdc3_ranges, 2, |
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0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC3_SEQ_MASK, |
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NULL, 0), |
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TPS65218_REGULATOR("DCDC4", "regulator-dcdc4", TPS65218_DCDC_4, |
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REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 53, |
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TPS65218_REG_CONTROL_DCDC4, |
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TPS65218_CONTROL_DCDC4_MASK, TPS65218_REG_ENABLE1, |
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TPS65218_ENABLE1_DC4_EN, 0, 0, dcdc4_ranges, 2, |
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0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC4_SEQ_MASK, |
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NULL, 0), |
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TPS65218_REGULATOR("DCDC5", "regulator-dcdc5", TPS65218_DCDC_5, |
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REGULATOR_VOLTAGE, tps65218_dcdc56_pmic_ops, 1, -1, |
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-1, TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC5_EN, 0, |
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0, NULL, 0, 0, 1000000, TPS65218_REG_SEQ5, |
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TPS65218_SEQ5_DC5_SEQ_MASK, NULL, 0), |
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TPS65218_REGULATOR("DCDC6", "regulator-dcdc6", TPS65218_DCDC_6, |
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REGULATOR_VOLTAGE, tps65218_dcdc56_pmic_ops, 1, -1, |
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-1, TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC6_EN, 0, |
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0, NULL, 0, 0, 1800000, TPS65218_REG_SEQ5, |
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TPS65218_SEQ5_DC6_SEQ_MASK, NULL, 0), |
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TPS65218_REGULATOR("LDO1", "regulator-ldo1", TPS65218_LDO_1, |
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REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64, |
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TPS65218_REG_CONTROL_LDO1, |
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TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2, |
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TPS65218_ENABLE2_LDO1_EN, 0, 0, ldo1_dcdc3_ranges, |
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2, 0, 0, TPS65218_REG_SEQ6, |
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TPS65218_SEQ6_LDO1_SEQ_MASK, NULL, 0), |
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TPS65218_REGULATOR("LS2", "regulator-ls2", TPS65218_LS_2, |
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REGULATOR_CURRENT, tps65218_ls23_ops, 0, 0, 0, |
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TPS65218_REG_ENABLE2, TPS65218_ENABLE2_LS2_EN, |
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TPS65218_REG_CONFIG2, TPS65218_CONFIG2_LS2ILIM_MASK, |
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NULL, 0, 0, 0, 0, 0, ls3_currents, |
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ARRAY_SIZE(ls3_currents)), |
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TPS65218_REGULATOR("LS3", "regulator-ls3", TPS65218_LS_3, |
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REGULATOR_CURRENT, tps65218_ls23_ops, 0, 0, 0, |
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TPS65218_REG_ENABLE2, TPS65218_ENABLE2_LS3_EN, |
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TPS65218_REG_CONFIG2, TPS65218_CONFIG2_LS3ILIM_MASK, |
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NULL, 0, 0, 0, 0, 0, ls3_currents, |
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ARRAY_SIZE(ls3_currents)), |
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}; |
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static int tps65218_regulator_probe(struct platform_device *pdev) |
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{ |
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struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent); |
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struct regulator_dev *rdev; |
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struct regulator_config config = { }; |
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int i, ret; |
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unsigned int val; |
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config.dev = &pdev->dev; |
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config.dev->of_node = tps->dev->of_node; |
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config.driver_data = tps; |
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config.regmap = tps->regmap; |
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/* Allocate memory for strobes */ |
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tps->strobes = devm_kcalloc(&pdev->dev, |
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TPS65218_NUM_REGULATOR, sizeof(u8), |
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GFP_KERNEL); |
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if (!tps->strobes) |
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return -ENOMEM; |
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for (i = 0; i < ARRAY_SIZE(regulators); i++) { |
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rdev = devm_regulator_register(&pdev->dev, ®ulators[i], |
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&config); |
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if (IS_ERR(rdev)) { |
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dev_err(tps->dev, "failed to register %s regulator\n", |
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pdev->name); |
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return PTR_ERR(rdev); |
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} |
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ret = regmap_read(tps->regmap, regulators[i].bypass_reg, &val); |
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if (ret) |
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return ret; |
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tps->strobes[i] = val & regulators[i].bypass_mask; |
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} |
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return 0; |
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} |
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static const struct platform_device_id tps65218_regulator_id_table[] = { |
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{ "tps65218-regulator", }, |
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{ /* sentinel */ } |
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}; |
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MODULE_DEVICE_TABLE(platform, tps65218_regulator_id_table); |
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static struct platform_driver tps65218_regulator_driver = { |
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.driver = { |
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.name = "tps65218-pmic", |
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}, |
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.probe = tps65218_regulator_probe, |
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.id_table = tps65218_regulator_id_table, |
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}; |
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module_platform_driver(tps65218_regulator_driver); |
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MODULE_AUTHOR("J Keerthy <[email protected]>"); |
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MODULE_DESCRIPTION("TPS65218 voltage regulator driver"); |
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MODULE_ALIAS("platform:tps65218-pmic"); |
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MODULE_LICENSE("GPL v2");
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