projects / deliverable / linux.git / blame
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1 | /* |
| 2 | * da9063-core.c: Device access for Dialog DA9063 modules | |
| 3 | * | |
| 4 | * Copyright 2012 Dialog Semiconductors Ltd. | |
| 5 | * Copyright 2013 Philipp Zabel, Pengutronix | |
| 6 | * | |
| 7 | * Author: Krystian Garbaciak <krystian.garbaciak@diasemi.com>, | |
| 8 | * Michal Hajduk <michal.hajduk@diasemi.com> | |
| 9 | * | |
| 10 | * This program is free software; you can redistribute it and/or modify it | |
| 11 | * under the terms of the GNU General Public License as published by the | |
| 12 | * Free Software Foundation; either version 2 of the License, or (at your | |
| 13 | * option) any later version. | |
| 14 | * | |
| 15 | */ | |
| 16 | ||
| 17 | #include <linux/kernel.h> | |
| 18 | #include <linux/module.h> | |
| 19 | #include <linux/init.h> | |
| 20 | #include <linux/slab.h> | |
| 21 | #include <linux/device.h> | |
| 22 | #include <linux/delay.h> | |
| 23 | #include <linux/interrupt.h> | |
| 24 | #include <linux/mutex.h> | |
| 25 | #include <linux/mfd/core.h> | |
| 26 | #include <linux/regmap.h> | |
| 27 | ||
| 28 | #include <linux/mfd/da9063/core.h> | |
| 29 | #include <linux/mfd/da9063/pdata.h> | |
| 30 | #include <linux/mfd/da9063/registers.h> | |
| 31 | ||
| 32 | #include <linux/proc_fs.h> | |
| 33 | #include <linux/kthread.h> | |
| 34 | #include <linux/uaccess.h> | |
| 35 | ||
| 36 | ||
| 37 | static struct mfd_cell da9063_devs[] = { | |
| 38 | { | |
| 39 | .name = DA9063_DRVNAME_REGULATORS, | |
| 40 | }, | |
| 41 | { | |
| 42 | .name = DA9063_DRVNAME_LEDS, | |
| 43 | }, | |
| 44 | { | |
| 45 | .name = DA9063_DRVNAME_WATCHDOG, | |
| 46 | }, | |
| 47 | { | |
| 48 | .name = DA9063_DRVNAME_HWMON, | |
| 49 | }, | |
| 50 | { | |
| 51 | .name = DA9063_DRVNAME_ONKEY, | |
| 52 | }, | |
| 53 | { | |
| 54 | .name = DA9063_DRVNAME_RTC, | |
| 55 | }, | |
| 56 | { | |
| 57 | .name = DA9063_DRVNAME_VIBRATION, | |
| 58 | }, | |
| 59 | }; | |
| 60 | ||
| 61 | int da9063_device_init(struct da9063 *da9063, unsigned int irq) | |
| 62 | { | |
| 63 | struct da9063_pdata *pdata = da9063->dev->platform_data; | |
| 64 | int model, revision; | |
| 65 | int ret; | |
| 66 | ||
| 67 | if (pdata) { | |
| 68 | da9063->flags = pdata->flags; | |
| 69 | da9063->irq_base = pdata->irq_base; | |
| 70 | } else { | |
| 71 | da9063->flags = 0; | |
| 72 | da9063->irq_base = 0; | |
| 73 | } | |
| 74 | da9063->chip_irq = irq; | |
| 75 | ||
| 76 | if (pdata && pdata->init != NULL) { | |
| 77 | ret = pdata->init(da9063); | |
| 78 | if (ret != 0) { | |
| 79 | dev_err(da9063->dev, | |
| 80 | "Platform initialization failed.\n"); | |
| 81 | return ret; | |
| 82 | } | |
| 83 | } | |
| 84 | ||
| 85 | ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_ID, &model); | |
| 86 | if (ret < 0) { | |
| 87 | dev_err(da9063->dev, "Cannot read chip model id.\n"); | |
| 88 | return -EIO; | |
| 89 | } | |
| 90 | if (model != PMIC_DA9063) { | |
| 91 | dev_err(da9063->dev, "Invalid chip model id: 0x%02x\n", model); | |
| 92 | return -ENODEV; | |
| 93 | } | |
| 94 | ||
| 95 | ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_VARIANT, &revision); | |
| 96 | if (ret < 0) { | |
| 97 | dev_err(da9063->dev, "Cannot read chip revision id.\n"); | |
| 98 | return -EIO; | |
| 99 | } | |
| 100 | revision >>= DA9063_CHIP_VARIANT_SHIFT; | |
| 101 | if (revision != 3) { | |
| 102 | dev_err(da9063->dev, "Unknown chip revision: %d\n", revision); | |
| 103 | return -ENODEV; | |
| 104 | } | |
| 105 | ||
| 106 | da9063->model = model; | |
| 107 | da9063->revision = revision; | |
| 108 | ||
| 109 | dev_info(da9063->dev, | |
| 110 | "Device detected (model-ID: 0x%02X rev-ID: 0x%02X)\n", | |
| 111 | model, revision); | |
| 112 | ||
| 113 | ret = mfd_add_devices(da9063->dev, -1, da9063_devs, | |
| 114 | ARRAY_SIZE(da9063_devs), NULL, da9063->irq_base, | |
| 115 | NULL); | |
| 116 | if (ret) | |
| 117 | dev_err(da9063->dev, "Cannot add MFD cells\n"); | |
| 118 | ||
| 119 | return ret; | |
| 120 | } | |
| 121 | ||
| 122 | void da9063_device_exit(struct da9063 *da9063) | |
| 123 | { | |
| 124 | mfd_remove_devices(da9063->dev); | |
| 125 | } | |
| 126 | ||
| 127 | MODULE_DESCRIPTION("PMIC driver for Dialog DA9063"); | |
| 128 | MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>, Michal Hajduk <michal.hajduk@diasemi.com>"); | |
| 129 | MODULE_LICENSE("GPL"); |