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3de5609959
The TPS65217 has a pre-defined power-up / power-down sequence which in a typical application does not need to be changed. However, it is possible to define custom sequences under I2C control. The power-up sequence is defined by strobes and delay times. Each output rail is assigned to a strobe to determine the order in which the rails are enabled. Every regulator of tps65217 PMIC has sequence registers and every regulator has a default strobe value and gets disabled when a particular power down sequence occurs. To keep a regulator on during suspend we write value 0 to strobe so that the regulator is out of all sequencers and is not impacted by any power down sequence. Hence saving the default strobe value during probe so that when we want to regulator to be enabled during suspend we write 0 to strobe and when we want it to get disabled during suspend we write the default saved strobe value. This allows platform data to specify which power rails should be on or off during RTC only suspend. This is necessary to keep DDR state while in RTC only suspend. Signed-off-by: Russ Dill <Russ.Dill@ti.com> [Enhanced commit log and added dynamic allocation for strobes] Signed-off-by: Keerthy <j-keerthy@ti.com> Signed-off-by: Mark Brown <broonie@kernel.org>
287 lines
9.2 KiB
C
287 lines
9.2 KiB
C
/*
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* tps65217-regulator.c
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*
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* Regulator driver for TPS65217 PMIC
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*
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* Copyright (C) 2011 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 as
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* published by the Free Software Foundation version 2.
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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 express 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 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/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/tps65217.h>
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#define TPS65217_REGULATOR(_name, _id, _of_match, _ops, _n, _vr, _vm, _em, \
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_t, _lr, _nlr, _sr, _sm) \
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{ \
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.name = _name, \
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.id = _id, \
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.of_match = of_match_ptr(_of_match), \
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.regulators_node= of_match_ptr("regulators"), \
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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 = TPS65217_REG_ENABLE, \
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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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.bypass_reg = _sr, \
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.bypass_mask = _sm, \
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} \
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static const unsigned int LDO1_VSEL_table[] = {
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1000000, 1100000, 1200000, 1250000,
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1300000, 1350000, 1400000, 1500000,
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1600000, 1800000, 2500000, 2750000,
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2800000, 3000000, 3100000, 3300000,
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};
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static const struct regulator_linear_range tps65217_uv1_ranges[] = {
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REGULATOR_LINEAR_RANGE(900000, 0, 24, 25000),
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REGULATOR_LINEAR_RANGE(1550000, 25, 30, 50000),
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REGULATOR_LINEAR_RANGE(1850000, 31, 52, 50000),
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REGULATOR_LINEAR_RANGE(3000000, 53, 55, 100000),
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REGULATOR_LINEAR_RANGE(3300000, 56, 62, 0),
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};
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static const struct regulator_linear_range tps65217_uv2_ranges[] = {
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REGULATOR_LINEAR_RANGE(1500000, 0, 8, 50000),
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REGULATOR_LINEAR_RANGE(2000000, 9, 13, 100000),
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REGULATOR_LINEAR_RANGE(2450000, 14, 31, 50000),
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};
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static int tps65217_pmic_enable(struct regulator_dev *dev)
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{
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struct tps65217 *tps = rdev_get_drvdata(dev);
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int rid = rdev_get_id(dev);
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if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
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return -EINVAL;
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/* Enable the regulator and password protection is level 1 */
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return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
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dev->desc->enable_mask, dev->desc->enable_mask,
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TPS65217_PROTECT_L1);
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}
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static int tps65217_pmic_disable(struct regulator_dev *dev)
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{
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struct tps65217 *tps = rdev_get_drvdata(dev);
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int rid = rdev_get_id(dev);
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if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
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return -EINVAL;
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/* Disable the regulator and password protection is level 1 */
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return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
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dev->desc->enable_mask, TPS65217_PROTECT_L1);
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}
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static int tps65217_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 tps65217 *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 = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
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selector, TPS65217_PROTECT_L2);
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/* Set GO bit for DCDCx to initiate voltage transistion */
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switch (rid) {
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case TPS65217_DCDC_1 ... TPS65217_DCDC_3:
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ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW,
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TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO,
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TPS65217_PROTECT_L2);
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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 tps65217_pmic_set_suspend_enable(struct regulator_dev *dev)
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{
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struct tps65217 *tps = rdev_get_drvdata(dev);
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unsigned int rid = rdev_get_id(dev);
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if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
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return -EINVAL;
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return tps65217_clear_bits(tps, dev->desc->bypass_reg,
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dev->desc->bypass_mask,
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TPS65217_PROTECT_L1);
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}
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static int tps65217_pmic_set_suspend_disable(struct regulator_dev *dev)
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{
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struct tps65217 *tps = rdev_get_drvdata(dev);
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unsigned int rid = rdev_get_id(dev);
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if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
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return -EINVAL;
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if (!tps->strobes[rid])
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return -EINVAL;
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return tps65217_set_bits(tps, dev->desc->bypass_reg,
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dev->desc->bypass_mask,
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tps->strobes[rid], TPS65217_PROTECT_L1);
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}
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/* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */
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static struct regulator_ops tps65217_pmic_ops = {
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.is_enabled = regulator_is_enabled_regmap,
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.enable = tps65217_pmic_enable,
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.disable = tps65217_pmic_disable,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = tps65217_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 = tps65217_pmic_set_suspend_enable,
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.set_suspend_disable = tps65217_pmic_set_suspend_disable,
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};
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/* Operations permitted on LDO1 */
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static struct regulator_ops tps65217_pmic_ldo1_ops = {
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.is_enabled = regulator_is_enabled_regmap,
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.enable = tps65217_pmic_enable,
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.disable = tps65217_pmic_disable,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = tps65217_pmic_set_voltage_sel,
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.list_voltage = regulator_list_voltage_table,
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.map_voltage = regulator_map_voltage_ascend,
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.set_suspend_enable = tps65217_pmic_set_suspend_enable,
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.set_suspend_disable = tps65217_pmic_set_suspend_disable,
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};
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static const struct regulator_desc regulators[] = {
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TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, "dcdc1",
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tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC1,
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TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC1_EN,
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NULL, tps65217_uv1_ranges, 2, TPS65217_REG_SEQ1,
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TPS65217_SEQ1_DC1_SEQ_MASK),
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TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, "dcdc2",
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tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC2,
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TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC2_EN,
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NULL, tps65217_uv1_ranges,
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ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ1,
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TPS65217_SEQ1_DC2_SEQ_MASK),
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TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, "dcdc3",
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tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC3,
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TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC3_EN,
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NULL, tps65217_uv1_ranges, 1, TPS65217_REG_SEQ2,
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TPS65217_SEQ2_DC3_SEQ_MASK),
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TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, "ldo1",
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tps65217_pmic_ldo1_ops, 16, TPS65217_REG_DEFLDO1,
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TPS65217_DEFLDO1_LDO1_MASK, TPS65217_ENABLE_LDO1_EN,
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LDO1_VSEL_table, NULL, 0, TPS65217_REG_SEQ2,
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TPS65217_SEQ2_LDO1_SEQ_MASK),
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TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, "ldo2", tps65217_pmic_ops,
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64, TPS65217_REG_DEFLDO2,
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TPS65217_DEFLDO2_LDO2_MASK, TPS65217_ENABLE_LDO2_EN,
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NULL, tps65217_uv1_ranges,
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ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ3,
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TPS65217_SEQ3_LDO2_SEQ_MASK),
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TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, "ldo3", tps65217_pmic_ops,
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32, TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK,
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TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN,
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NULL, tps65217_uv2_ranges,
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ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ3,
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TPS65217_SEQ3_LDO3_SEQ_MASK),
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TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, "ldo4", tps65217_pmic_ops,
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32, TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK,
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TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN,
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NULL, tps65217_uv2_ranges,
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ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ4,
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TPS65217_SEQ4_LDO4_SEQ_MASK),
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};
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static int tps65217_regulator_probe(struct platform_device *pdev)
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{
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struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
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struct tps65217_board *pdata = dev_get_platdata(tps->dev);
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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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if (tps65217_chip_id(tps) != TPS65217) {
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dev_err(&pdev->dev, "Invalid tps chip version\n");
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return -ENODEV;
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}
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/* Allocate memory for strobes */
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tps->strobes = devm_kzalloc(&pdev->dev, sizeof(u8) *
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TPS65217_NUM_REGULATOR, GFP_KERNEL);
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platform_set_drvdata(pdev, tps);
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for (i = 0; i < TPS65217_NUM_REGULATOR; i++) {
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/* Register the regulators */
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config.dev = tps->dev;
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if (pdata)
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config.init_data = pdata->tps65217_init_data[i];
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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[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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/* Store default strobe info */
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ret = tps65217_reg_read(tps, regulators[i].bypass_reg, &val);
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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 struct platform_driver tps65217_regulator_driver = {
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.driver = {
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.name = "tps65217-pmic",
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},
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.probe = tps65217_regulator_probe,
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};
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static int __init tps65217_regulator_init(void)
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{
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return platform_driver_register(&tps65217_regulator_driver);
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}
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subsys_initcall(tps65217_regulator_init);
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static void __exit tps65217_regulator_exit(void)
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{
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platform_driver_unregister(&tps65217_regulator_driver);
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}
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module_exit(tps65217_regulator_exit);
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MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
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MODULE_DESCRIPTION("TPS65217 voltage regulator driver");
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MODULE_ALIAS("platform:tps65217-pmic");
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MODULE_LICENSE("GPL v2");
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