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8dc995f56e
CONFIG_HOTPLUG is going away as an option so __devexit is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
188 lines
4.4 KiB
C
188 lines
4.4 KiB
C
/*
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* wm8994-regulator.c -- Regulator driver for the WM8994
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*
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* Copyright 2009 Wolfson Microelectronics PLC.
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*
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* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/bitops.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/gpio.h>
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#include <linux/slab.h>
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#include <linux/mfd/wm8994/core.h>
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#include <linux/mfd/wm8994/registers.h>
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#include <linux/mfd/wm8994/pdata.h>
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struct wm8994_ldo {
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struct regulator_dev *regulator;
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struct wm8994 *wm8994;
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};
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#define WM8994_LDO1_MAX_SELECTOR 0x7
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#define WM8994_LDO2_MAX_SELECTOR 0x3
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static struct regulator_ops wm8994_ldo1_ops = {
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.list_voltage = regulator_list_voltage_linear,
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.map_voltage = regulator_map_voltage_linear,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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};
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static int wm8994_ldo2_list_voltage(struct regulator_dev *rdev,
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unsigned int selector)
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{
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struct wm8994_ldo *ldo = rdev_get_drvdata(rdev);
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if (selector > WM8994_LDO2_MAX_SELECTOR)
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return -EINVAL;
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switch (ldo->wm8994->type) {
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case WM8994:
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return (selector * 100000) + 900000;
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case WM8958:
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return (selector * 100000) + 1000000;
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case WM1811:
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switch (selector) {
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case 0:
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return -EINVAL;
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default:
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return (selector * 100000) + 950000;
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}
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break;
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default:
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return -EINVAL;
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}
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}
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static struct regulator_ops wm8994_ldo2_ops = {
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.list_voltage = wm8994_ldo2_list_voltage,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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};
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static const struct regulator_desc wm8994_ldo_desc[] = {
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{
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.name = "LDO1",
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.id = 1,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = WM8994_LDO1_MAX_SELECTOR + 1,
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.vsel_reg = WM8994_LDO_1,
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.vsel_mask = WM8994_LDO1_VSEL_MASK,
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.ops = &wm8994_ldo1_ops,
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.min_uV = 2400000,
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.uV_step = 100000,
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.enable_time = 3000,
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.owner = THIS_MODULE,
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},
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{
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.name = "LDO2",
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.id = 2,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = WM8994_LDO2_MAX_SELECTOR + 1,
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.vsel_reg = WM8994_LDO_2,
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.vsel_mask = WM8994_LDO2_VSEL_MASK,
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.ops = &wm8994_ldo2_ops,
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.enable_time = 3000,
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.owner = THIS_MODULE,
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},
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};
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static int wm8994_ldo_probe(struct platform_device *pdev)
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{
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struct wm8994 *wm8994 = dev_get_drvdata(pdev->dev.parent);
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struct wm8994_pdata *pdata = wm8994->dev->platform_data;
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int id = pdev->id % ARRAY_SIZE(pdata->ldo);
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struct regulator_config config = { };
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struct wm8994_ldo *ldo;
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int ret;
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dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
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ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm8994_ldo), GFP_KERNEL);
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if (ldo == NULL) {
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dev_err(&pdev->dev, "Unable to allocate private data\n");
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return -ENOMEM;
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}
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ldo->wm8994 = wm8994;
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config.dev = wm8994->dev;
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config.driver_data = ldo;
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config.regmap = wm8994->regmap;
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if (pdata) {
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config.init_data = pdata->ldo[id].init_data;
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config.ena_gpio = pdata->ldo[id].enable;
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}
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ldo->regulator = regulator_register(&wm8994_ldo_desc[id], &config);
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if (IS_ERR(ldo->regulator)) {
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ret = PTR_ERR(ldo->regulator);
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dev_err(wm8994->dev, "Failed to register LDO%d: %d\n",
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id + 1, ret);
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goto err;
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}
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platform_set_drvdata(pdev, ldo);
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return 0;
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err:
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return ret;
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}
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static int wm8994_ldo_remove(struct platform_device *pdev)
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{
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struct wm8994_ldo *ldo = platform_get_drvdata(pdev);
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platform_set_drvdata(pdev, NULL);
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regulator_unregister(ldo->regulator);
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return 0;
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}
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static struct platform_driver wm8994_ldo_driver = {
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.probe = wm8994_ldo_probe,
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.remove = wm8994_ldo_remove,
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.driver = {
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.name = "wm8994-ldo",
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.owner = THIS_MODULE,
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},
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};
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static int __init wm8994_ldo_init(void)
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{
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int ret;
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ret = platform_driver_register(&wm8994_ldo_driver);
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if (ret != 0)
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pr_err("Failed to register Wm8994 GP LDO driver: %d\n", ret);
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return ret;
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}
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subsys_initcall(wm8994_ldo_init);
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static void __exit wm8994_ldo_exit(void)
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{
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platform_driver_unregister(&wm8994_ldo_driver);
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}
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module_exit(wm8994_ldo_exit);
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/* Module information */
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MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
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MODULE_DESCRIPTION("WM8994 LDO driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:wm8994-ldo");
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