24282a1ca3
MFD driver registers the regulator driver once per device and hence it is require to register all regulators in single probe call. Following are details of changes done to achieve this: - Move the regulator enums to mfd header and remove the tps65090-regulator.h as it does not contain more info. - Add max regulator and register all regulators even if there is no regulator init data from platform. - Convert regulator init data to pointer type in platform data. - Add input supply name in regulator desc to provide input supply. - Separate desc information from driver information. - Disable external control bit to have control through register write. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
230 lines
6.2 KiB
C
230 lines
6.2 KiB
C
/*
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* Regulator driver for tps65090 power management chip.
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*
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* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.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/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/mfd/tps65090.h>
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struct tps65090_regulator {
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struct device *dev;
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struct regulator_desc *desc;
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struct regulator_dev *rdev;
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};
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static struct regulator_ops tps65090_ops = {
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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};
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#define tps65090_REG_DESC(_id, _sname, _en_reg, _ops) \
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{ \
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.name = "TPS65090_RAILS"#_id, \
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.supply_name = _sname, \
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.id = TPS65090_ID_##_id, \
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.ops = &_ops, \
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.enable_reg = _en_reg, \
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.enable_mask = BIT(0), \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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}
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static struct regulator_desc tps65090_regulator_desc[] = {
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tps65090_REG_DESC(DCDC1, "vsys1", 0x0C, tps65090_ops),
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tps65090_REG_DESC(DCDC2, "vsys2", 0x0D, tps65090_ops),
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tps65090_REG_DESC(DCDC3, "vsys3", 0x0E, tps65090_ops),
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tps65090_REG_DESC(FET1, "infet1", 0x0F, tps65090_ops),
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tps65090_REG_DESC(FET2, "infet2", 0x10, tps65090_ops),
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tps65090_REG_DESC(FET3, "infet3", 0x11, tps65090_ops),
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tps65090_REG_DESC(FET4, "infet4", 0x12, tps65090_ops),
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tps65090_REG_DESC(FET5, "infet5", 0x13, tps65090_ops),
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tps65090_REG_DESC(FET6, "infet6", 0x14, tps65090_ops),
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tps65090_REG_DESC(FET7, "infet7", 0x15, tps65090_ops),
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};
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static inline bool is_dcdc(int id)
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{
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switch (id) {
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case TPS65090_ID_DCDC1:
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case TPS65090_ID_DCDC2:
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case TPS65090_ID_DCDC3:
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return true;
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default:
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return false;
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}
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}
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static int __devinit tps65090_config_ext_control(
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struct tps65090_regulator *ri, bool enable)
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{
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int ret;
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struct device *parent = ri->dev->parent;
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unsigned int reg_en_reg = ri->desc->enable_reg;
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if (enable)
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ret = tps65090_set_bits(parent, reg_en_reg, 1);
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else
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ret = tps65090_clr_bits(parent, reg_en_reg, 1);
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if (ret < 0)
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dev_err(ri->dev, "Error in updating reg 0x%x\n", reg_en_reg);
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return ret;
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}
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static int __devinit tps65090_regulator_disable_ext_control(
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struct tps65090_regulator *ri,
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struct tps65090_regulator_plat_data *tps_pdata)
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{
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int ret = 0;
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struct device *parent = ri->dev->parent;
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unsigned int reg_en_reg = ri->desc->enable_reg;
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/*
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* First enable output for internal control if require.
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* And then disable external control.
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*/
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if (tps_pdata->reg_init_data->constraints.always_on ||
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tps_pdata->reg_init_data->constraints.boot_on) {
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ret = tps65090_set_bits(parent, reg_en_reg, 0);
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if (ret < 0) {
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dev_err(ri->dev, "Error in set reg 0x%x\n", reg_en_reg);
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return ret;
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}
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}
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return tps65090_config_ext_control(ri, false);
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}
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static int __devinit tps65090_regulator_probe(struct platform_device *pdev)
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{
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struct tps65090 *tps65090_mfd = dev_get_drvdata(pdev->dev.parent);
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struct tps65090_regulator *ri = NULL;
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struct regulator_config config = { };
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struct regulator_dev *rdev;
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struct tps65090_regulator_plat_data *tps_pdata;
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struct tps65090_regulator *pmic;
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struct tps65090_platform_data *tps65090_pdata;
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int num;
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int ret;
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dev_dbg(&pdev->dev, "Probing regulator\n");
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tps65090_pdata = dev_get_platdata(pdev->dev.parent);
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if (!tps65090_pdata) {
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dev_err(&pdev->dev, "Platform data missing\n");
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return -EINVAL;
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}
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pmic = devm_kzalloc(&pdev->dev, TPS65090_ID_MAX * sizeof(*pmic),
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GFP_KERNEL);
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if (!pmic) {
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dev_err(&pdev->dev, "mem alloc for pmic failed\n");
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return -ENOMEM;
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}
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for (num = 0; num < TPS65090_ID_MAX; num++) {
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tps_pdata = tps65090_pdata->reg_pdata[num];
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ri = &pmic[num];
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ri->dev = &pdev->dev;
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ri->desc = &tps65090_regulator_desc[num];
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/*
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* TPS5090 DCDC support the control from external digital input.
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* It may be possible that during boot, the external control is
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* enabled. Disabling external control for DCDC.
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*/
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if (tps_pdata && is_dcdc(num) && tps_pdata->reg_init_data) {
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ret = tps65090_regulator_disable_ext_control(
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ri, tps_pdata);
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if (ret < 0) {
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dev_err(&pdev->dev,
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"failed disable ext control\n");
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goto scrub;
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}
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}
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config.dev = &pdev->dev;
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config.driver_data = ri;
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config.regmap = tps65090_mfd->rmap;
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if (tps_pdata)
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config.init_data = tps_pdata->reg_init_data;
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else
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config.init_data = NULL;
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rdev = regulator_register(ri->desc, &config);
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if (IS_ERR(rdev)) {
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dev_err(&pdev->dev, "failed to register regulator %s\n",
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ri->desc->name);
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ret = PTR_ERR(rdev);
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goto scrub;
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}
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ri->rdev = rdev;
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}
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platform_set_drvdata(pdev, pmic);
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return 0;
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scrub:
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while (--num >= 0) {
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ri = &pmic[num];
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regulator_unregister(ri->rdev);
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}
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return ret;
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}
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static int __devexit tps65090_regulator_remove(struct platform_device *pdev)
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{
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struct tps65090_regulator *pmic = platform_get_drvdata(pdev);
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struct tps65090_regulator *ri;
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int num;
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for (num = 0; num < TPS65090_ID_MAX; ++num) {
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ri = &pmic[num];
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regulator_unregister(ri->rdev);
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}
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return 0;
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}
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static struct platform_driver tps65090_regulator_driver = {
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.driver = {
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.name = "tps65090-regulator",
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.owner = THIS_MODULE,
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},
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.probe = tps65090_regulator_probe,
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.remove = __devexit_p(tps65090_regulator_remove),
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};
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static int __init tps65090_regulator_init(void)
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{
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return platform_driver_register(&tps65090_regulator_driver);
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}
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subsys_initcall(tps65090_regulator_init);
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static void __exit tps65090_regulator_exit(void)
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{
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platform_driver_unregister(&tps65090_regulator_driver);
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}
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module_exit(tps65090_regulator_exit);
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MODULE_DESCRIPTION("tps65090 regulator driver");
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MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
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MODULE_LICENSE("GPL v2");
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