437 lines
12 KiB
C
437 lines
12 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, _ops, _n, _vr, _vm, _em, _t) \
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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 = TPS65217_REG_ENABLE, \
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.enable_mask = _em, \
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.volt_table = _t, \
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} \
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#define TPS65217_INFO(_nm, _min, _max, _f1, _f2) \
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{ \
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.name = _nm, \
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.min_uV = _min, \
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.max_uV = _max, \
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.vsel_to_uv = _f1, \
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.uv_to_vsel = _f2, \
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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 int tps65217_vsel_to_uv1(unsigned int vsel)
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{
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int uV = 0;
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if (vsel > 63)
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return -EINVAL;
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if (vsel <= 24)
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uV = vsel * 25000 + 900000;
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else if (vsel <= 52)
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uV = (vsel - 24) * 50000 + 1500000;
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else if (vsel < 56)
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uV = (vsel - 52) * 100000 + 2900000;
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else
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uV = 3300000;
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return uV;
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}
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static int tps65217_uv_to_vsel1(int uV, unsigned int *vsel)
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{
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if (uV < 0 || uV > 3300000)
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return -EINVAL;
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if (uV <= 1500000)
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*vsel = DIV_ROUND_UP(uV - 900000, 25000);
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else if (uV <= 2900000)
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*vsel = 24 + DIV_ROUND_UP(uV - 1500000, 50000);
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else if (uV < 3300000)
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*vsel = 52 + DIV_ROUND_UP(uV - 2900000, 100000);
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else
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*vsel = 56;
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return 0;
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}
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static int tps65217_vsel_to_uv2(unsigned int vsel)
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{
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int uV = 0;
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if (vsel > 31)
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return -EINVAL;
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if (vsel <= 8)
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uV = vsel * 50000 + 1500000;
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else if (vsel <= 13)
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uV = (vsel - 8) * 100000 + 1900000;
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else
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uV = (vsel - 13) * 50000 + 2400000;
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return uV;
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}
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static int tps65217_uv_to_vsel2(int uV, unsigned int *vsel)
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{
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if (uV < 0 || uV > 3300000)
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return -EINVAL;
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if (uV <= 1900000)
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*vsel = DIV_ROUND_UP(uV - 1500000, 50000);
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else if (uV <= 2400000)
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*vsel = 8 + DIV_ROUND_UP(uV - 1900000, 100000);
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else
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*vsel = 13 + DIV_ROUND_UP(uV - 2400000, 50000);
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return 0;
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}
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static struct tps_info tps65217_pmic_regs[] = {
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TPS65217_INFO("DCDC1", 900000, 1800000, tps65217_vsel_to_uv1,
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tps65217_uv_to_vsel1),
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TPS65217_INFO("DCDC2", 900000, 3300000, tps65217_vsel_to_uv1,
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tps65217_uv_to_vsel1),
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TPS65217_INFO("DCDC3", 900000, 1500000, tps65217_vsel_to_uv1,
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tps65217_uv_to_vsel1),
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TPS65217_INFO("LDO1", 1000000, 3300000, NULL, NULL),
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TPS65217_INFO("LDO2", 900000, 3300000, tps65217_vsel_to_uv1,
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tps65217_uv_to_vsel1),
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TPS65217_INFO("LDO3", 1800000, 3300000, tps65217_vsel_to_uv2,
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tps65217_uv_to_vsel2),
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TPS65217_INFO("LDO4", 1800000, 3300000, tps65217_vsel_to_uv2,
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tps65217_uv_to_vsel2),
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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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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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/* 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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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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/* 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_map_voltage(struct regulator_dev *dev,
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int min_uV, int max_uV)
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{
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struct tps65217 *tps = rdev_get_drvdata(dev);
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unsigned int sel, rid = rdev_get_id(dev);
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int ret;
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/* LDO1 uses regulator_map_voltage_iterate() */
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if (rid == TPS65217_LDO_1)
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return -EINVAL;
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if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
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return -EINVAL;
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if (min_uV < tps->info[rid]->min_uV)
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min_uV = tps->info[rid]->min_uV;
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if (max_uV < tps->info[rid]->min_uV || min_uV > tps->info[rid]->max_uV)
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return -EINVAL;
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ret = tps->info[rid]->uv_to_vsel(min_uV, &sel);
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if (ret)
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return ret;
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return sel;
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}
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static int tps65217_pmic_list_voltage(struct regulator_dev *dev,
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unsigned selector)
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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 (selector >= dev->desc->n_voltages)
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return -EINVAL;
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return tps->info[rid]->vsel_to_uv(selector);
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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 = tps65217_pmic_list_voltage,
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.map_voltage = tps65217_pmic_map_voltage,
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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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};
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static const struct regulator_desc regulators[] = {
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TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, tps65217_pmic_ops, 64,
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TPS65217_REG_DEFDCDC1, TPS65217_DEFDCDCX_DCDC_MASK,
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TPS65217_ENABLE_DC1_EN, NULL),
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TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, tps65217_pmic_ops, 64,
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TPS65217_REG_DEFDCDC2, TPS65217_DEFDCDCX_DCDC_MASK,
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TPS65217_ENABLE_DC2_EN, NULL),
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TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, tps65217_pmic_ops, 64,
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TPS65217_REG_DEFDCDC3, TPS65217_DEFDCDCX_DCDC_MASK,
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TPS65217_ENABLE_DC3_EN, NULL),
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TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, tps65217_pmic_ldo1_ops, 16,
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TPS65217_REG_DEFLDO1, TPS65217_DEFLDO1_LDO1_MASK,
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TPS65217_ENABLE_LDO1_EN, LDO1_VSEL_table),
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TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, tps65217_pmic_ops, 64,
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TPS65217_REG_DEFLDO2, TPS65217_DEFLDO2_LDO2_MASK,
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TPS65217_ENABLE_LDO2_EN, NULL),
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TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, tps65217_pmic_ops, 32,
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TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK,
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TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN,
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NULL),
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TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, tps65217_pmic_ops, 32,
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TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK,
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TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN,
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NULL),
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};
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#ifdef CONFIG_OF
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static struct of_regulator_match reg_matches[] = {
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{ .name = "dcdc1", .driver_data = (void *)TPS65217_DCDC_1 },
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{ .name = "dcdc2", .driver_data = (void *)TPS65217_DCDC_2 },
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{ .name = "dcdc3", .driver_data = (void *)TPS65217_DCDC_3 },
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{ .name = "ldo1", .driver_data = (void *)TPS65217_LDO_1 },
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{ .name = "ldo2", .driver_data = (void *)TPS65217_LDO_2 },
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{ .name = "ldo3", .driver_data = (void *)TPS65217_LDO_3 },
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{ .name = "ldo4", .driver_data = (void *)TPS65217_LDO_4 },
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};
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static struct tps65217_board *tps65217_parse_dt(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 device_node *node = tps->dev->of_node;
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struct tps65217_board *pdata;
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struct device_node *regs;
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int i, count;
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regs = of_find_node_by_name(node, "regulators");
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if (!regs)
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return NULL;
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count = of_regulator_match(&pdev->dev, regs, reg_matches,
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TPS65217_NUM_REGULATOR);
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of_node_put(regs);
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if ((count < 0) || (count > TPS65217_NUM_REGULATOR))
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return NULL;
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pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
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if (!pdata)
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return NULL;
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for (i = 0; i < count; i++) {
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if (!reg_matches[i].init_data || !reg_matches[i].of_node)
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continue;
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pdata->tps65217_init_data[i] = reg_matches[i].init_data;
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pdata->of_node[i] = reg_matches[i].of_node;
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}
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return pdata;
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}
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#else
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static struct tps65217_board *tps65217_parse_dt(struct platform_device *pdev)
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{
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return NULL;
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}
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#endif
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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_init_data *reg_data;
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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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if (tps->dev->of_node)
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pdata = tps65217_parse_dt(pdev);
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if (!pdata) {
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dev_err(&pdev->dev, "Platform data not found\n");
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return -EINVAL;
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}
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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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platform_set_drvdata(pdev, tps);
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for (i = 0; i < TPS65217_NUM_REGULATOR; i++) {
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reg_data = pdata->tps65217_init_data[i];
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/*
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* Regulator API handles empty constraints but not NULL
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* constraints
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*/
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if (!reg_data)
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continue;
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/* Register the regulators */
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tps->info[i] = &tps65217_pmic_regs[i];
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config.dev = tps->dev;
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config.init_data = reg_data;
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config.driver_data = tps;
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config.regmap = tps->regmap;
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if (tps->dev->of_node)
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config.of_node = pdata->of_node[i];
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rdev = regulator_register(®ulators[i], &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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ret = PTR_ERR(rdev);
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goto err_unregister_regulator;
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}
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/* Save regulator for cleanup */
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tps->rdev[i] = rdev;
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}
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return 0;
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err_unregister_regulator:
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while (--i >= 0)
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regulator_unregister(tps->rdev[i]);
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return ret;
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}
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static int tps65217_regulator_remove(struct platform_device *pdev)
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{
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struct tps65217 *tps = platform_get_drvdata(pdev);
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unsigned int i;
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for (i = 0; i < TPS65217_NUM_REGULATOR; i++)
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regulator_unregister(tps->rdev[i]);
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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 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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.remove = tps65217_regulator_remove,
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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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