mirror of
https://github.com/torvalds/linux
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150 lines
3.9 KiB
C
150 lines
3.9 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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#include <linux/regulator/tps65090-regulator.h>
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struct tps65090_regulator {
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int id;
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/* used by regulator core */
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struct regulator_desc desc;
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/* Device */
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struct device *dev;
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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(_id) \
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{ \
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.id = TPS65090_ID_##_id, \
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.desc = { \
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.name = tps65090_rails(_id), \
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.id = TPS65090_ID_##_id, \
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.ops = &tps65090_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.enable_reg = (TPS65090_ID_##_id) + 12, \
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.enable_mask = BIT(0), \
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}, \
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}
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static struct tps65090_regulator TPS65090_regulator[] = {
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tps65090_REG(DCDC1),
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tps65090_REG(DCDC2),
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tps65090_REG(DCDC3),
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tps65090_REG(FET1),
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tps65090_REG(FET2),
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tps65090_REG(FET3),
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tps65090_REG(FET4),
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tps65090_REG(FET5),
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tps65090_REG(FET6),
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tps65090_REG(FET7),
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};
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static inline struct tps65090_regulator *find_regulator_info(int id)
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{
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struct tps65090_regulator *ri;
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int i;
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for (i = 0; i < ARRAY_SIZE(TPS65090_regulator); i++) {
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ri = &TPS65090_regulator[i];
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if (ri->desc.id == id)
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return ri;
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}
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return NULL;
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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_platform_data *tps_pdata;
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int id = pdev->id;
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dev_dbg(&pdev->dev, "Probing regulator %d\n", id);
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ri = find_regulator_info(id);
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if (ri == NULL) {
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dev_err(&pdev->dev, "invalid regulator ID specified\n");
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return -EINVAL;
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}
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tps_pdata = pdev->dev.platform_data;
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ri->dev = &pdev->dev;
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config.dev = &pdev->dev;
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config.init_data = &tps_pdata->regulator;
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config.driver_data = ri;
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config.regmap = tps65090_mfd->rmap;
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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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return PTR_ERR(rdev);
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}
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platform_set_drvdata(pdev, rdev);
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return 0;
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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 regulator_dev *rdev = platform_get_drvdata(pdev);
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regulator_unregister(rdev);
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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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