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90e7d52627
This patch adds support for TPS65218 PMIC regulators. The regulators set consists of 6 DCDCs and 1 LDO. The output voltages are configurable and are meant to supply power to the main processor and other components. Signed-off-by: Keerthy <j-keerthy@ti.com> Signed-off-by: Mark Brown <broonie@linaro.org>
305 lines
9.4 KiB
C
305 lines
9.4 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/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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static unsigned int tps65218_ramp_delay = 4000;
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enum tps65218_regulators { DCDC1, DCDC2, DCDC3, DCDC4, DCDC5, DCDC6, LDO1 };
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#define TPS65218_REGULATOR(_name, _id, _ops, _n, _vr, _vm, _er, _em, _t, \
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_lr, _nlr) \
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{ \
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.name = _name, \
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.id = _id, \
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.ops = &_ops, \
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.n_voltages = _n, \
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.type = REGULATOR_VOLTAGE, \
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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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.enable_reg = _er, \
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.enable_mask = _em, \
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.volt_table = _t, \
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.linear_ranges = _lr, \
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.n_linear_ranges = _nlr, \
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} \
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#define TPS65218_INFO(_id, _nm, _min, _max) \
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{ \
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.id = _id, \
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.name = _nm, \
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.min_uV = _min, \
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.max_uV = _max, \
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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(1550000, 0x10, 0x34, 50000),
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};
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static struct tps_info tps65218_pmic_regs[] = {
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TPS65218_INFO(0, "DCDC1", 850000, 167500),
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TPS65218_INFO(1, "DCDC2", 850000, 1675000),
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TPS65218_INFO(2, "DCDC3", 900000, 3400000),
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TPS65218_INFO(3, "DCDC4", 1175000, 3400000),
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TPS65218_INFO(4, "DCDC5", 1000000, 1000000),
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TPS65218_INFO(5, "DCDC6", 1800000, 1800000),
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TPS65218_INFO(6, "LDO1", 900000, 3400000),
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};
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#define TPS65218_OF_MATCH(comp, label) \
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{ \
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.compatible = comp, \
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.data = &label, \
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}
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static const struct of_device_id tps65218_of_match[] = {
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TPS65218_OF_MATCH("ti,tps65218-dcdc1", tps65218_pmic_regs[DCDC1]),
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TPS65218_OF_MATCH("ti,tps65218-dcdc2", tps65218_pmic_regs[DCDC2]),
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TPS65218_OF_MATCH("ti,tps65218-dcdc3", tps65218_pmic_regs[DCDC3]),
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TPS65218_OF_MATCH("ti,tps65218-dcdc4", tps65218_pmic_regs[DCDC4]),
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TPS65218_OF_MATCH("ti,tps65218-dcdc5", tps65218_pmic_regs[DCDC5]),
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TPS65218_OF_MATCH("ti,tps65218-dcdc6", tps65218_pmic_regs[DCDC6]),
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TPS65218_OF_MATCH("ti,tps65218-ldo1", tps65218_pmic_regs[LDO1]),
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};
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MODULE_DEVICE_TABLE(of, tps65218_of_match);
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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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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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/* 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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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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/* 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_set_voltage_time_sel(struct regulator_dev *rdev,
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unsigned int old_selector, unsigned int new_selector)
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{
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int old_uv, new_uv;
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old_uv = regulator_list_voltage_linear_range(rdev, old_selector);
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if (old_uv < 0)
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return old_uv;
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new_uv = regulator_list_voltage_linear_range(rdev, new_selector);
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if (new_uv < 0)
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return new_uv;
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return DIV_ROUND_UP(abs(old_uv - new_uv), tps65218_ramp_delay);
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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 = tps65218_set_voltage_time_sel,
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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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};
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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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};
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static const struct regulator_desc regulators[] = {
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TPS65218_REGULATOR("DCDC1", TPS65218_DCDC_1, tps65218_dcdc12_ops, 64,
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TPS65218_REG_CONTROL_DCDC1,
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TPS65218_CONTROL_DCDC1_MASK,
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TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC1_EN, NULL,
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dcdc1_dcdc2_ranges, 2),
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TPS65218_REGULATOR("DCDC2", TPS65218_DCDC_2, tps65218_dcdc12_ops, 64,
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TPS65218_REG_CONTROL_DCDC2,
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TPS65218_CONTROL_DCDC2_MASK,
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TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC2_EN, NULL,
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dcdc1_dcdc2_ranges, 2),
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TPS65218_REGULATOR("DCDC3", TPS65218_DCDC_3, tps65218_ldo1_dcdc34_ops,
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64, TPS65218_REG_CONTROL_DCDC3,
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TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1,
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TPS65218_ENABLE1_DC3_EN, NULL,
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ldo1_dcdc3_ranges, 2),
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TPS65218_REGULATOR("DCDC4", TPS65218_DCDC_4, tps65218_ldo1_dcdc34_ops,
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53, TPS65218_REG_CONTROL_DCDC4,
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TPS65218_CONTROL_DCDC4_MASK,
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TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC4_EN, NULL,
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dcdc4_ranges, 2),
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TPS65218_REGULATOR("DCDC5", TPS65218_DCDC_5, tps65218_dcdc56_pmic_ops,
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1, -1, -1, TPS65218_REG_ENABLE1,
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TPS65218_ENABLE1_DC5_EN, NULL, NULL, 0),
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TPS65218_REGULATOR("DCDC6", TPS65218_DCDC_6, tps65218_dcdc56_pmic_ops,
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1, -1, -1, TPS65218_REG_ENABLE1,
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TPS65218_ENABLE1_DC6_EN, NULL, NULL, 0),
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TPS65218_REGULATOR("LDO1", TPS65218_LDO_1, tps65218_ldo1_dcdc34_ops, 64,
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TPS65218_REG_CONTROL_DCDC4,
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TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2,
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TPS65218_ENABLE2_LDO1_EN, NULL, ldo1_dcdc3_ranges,
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2),
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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_init_data *init_data;
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const struct tps_info *template;
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struct regulator_dev *rdev;
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const struct of_device_id *match;
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struct regulator_config config = { };
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int id;
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match = of_match_device(tps65218_of_match, &pdev->dev);
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if (match) {
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template = match->data;
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id = template->id;
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init_data = of_get_regulator_init_data(&pdev->dev,
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pdev->dev.of_node);
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} else {
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return -ENODEV;
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}
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platform_set_drvdata(pdev, tps);
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tps->info[id] = &tps65218_pmic_regs[id];
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config.dev = &pdev->dev;
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config.init_data = init_data;
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config.driver_data = tps;
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config.regmap = tps->regmap;
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rdev = devm_regulator_register(&pdev->dev, ®ulators[id], &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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/* Save regulator */
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tps->rdev[id] = rdev;
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return 0;
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}
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static int tps65218_regulator_remove(struct platform_device *pdev)
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{
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struct tps65218 *tps = platform_get_drvdata(pdev);
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const struct of_device_id *match;
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const struct tps_info *template;
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match = of_match_device(tps65218_of_match, &pdev->dev);
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template = match->data;
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regulator_unregister(tps->rdev[template->id]);
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platform_set_drvdata(pdev, NULL);
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return 0;
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}
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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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.owner = THIS_MODULE,
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.of_match_table = of_match_ptr(tps65218_of_match),
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},
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.probe = tps65218_regulator_probe,
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.remove = tps65218_regulator_remove,
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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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