371 lines
12 KiB
C
371 lines
12 KiB
C
/*
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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 - http://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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{ \
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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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.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 regulator_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 regulator_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 regulator_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_DCDC_1 || 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_DCDC_1 || 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 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 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 int ls3_currents[] = { 100, 200, 500, 1000 };
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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 << 2, 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 << 2, TPS65218_PROTECT_L1);
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}
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static int tps65218_pmic_get_current_limit(struct regulator_dev *dev)
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{
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int retval;
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unsigned int index;
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struct tps65218 *tps = rdev_get_drvdata(dev);
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retval = regmap_read(tps->regmap, dev->desc->csel_reg, &index);
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if (retval < 0)
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return retval;
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index = (index & dev->desc->csel_mask) >> 2;
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return ls3_currents[index];
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}
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static struct regulator_ops tps65218_ls3_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 = tps65218_pmic_get_current_limit,
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};
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/* Operations permitted on DCDC5, DCDC6 */
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static 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),
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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),
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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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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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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),
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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),
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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),
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TPS65218_REGULATOR("LS3", "regulator-ls3", TPS65218_LS_3,
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REGULATOR_CURRENT, tps65218_ls3_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),
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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_kzalloc(&pdev->dev, sizeof(u8) *
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TPS65218_NUM_REGULATOR, 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 <j-keerthy@ti.com>");
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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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