diff options
Diffstat (limited to 'drivers/mfd/da9063-core.c')
| -rw-r--r-- | drivers/mfd/da9063-core.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/drivers/mfd/da9063-core.c b/drivers/mfd/da9063-core.c new file mode 100644 index 00000000000..29f3ed1f076 --- /dev/null +++ b/drivers/mfd/da9063-core.c @@ -0,0 +1,129 @@ +/* + * da9063-core.c: Device access for Dialog DA9063 modules + * + * Copyright 2012 Dialog Semiconductors Ltd. + * Copyright 2013 Philipp Zabel, Pengutronix + * + * Author: Krystian Garbaciak <krystian.garbaciak@diasemi.com>, + * Michal Hajduk <michal.hajduk@diasemi.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/device.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/mutex.h> +#include <linux/mfd/core.h> +#include <linux/regmap.h> + +#include <linux/mfd/da9063/core.h> +#include <linux/mfd/da9063/pdata.h> +#include <linux/mfd/da9063/registers.h> + +#include <linux/proc_fs.h> +#include <linux/kthread.h> +#include <linux/uaccess.h> + + +static struct mfd_cell da9063_devs[] = { + { + .name = DA9063_DRVNAME_REGULATORS, + }, + { + .name = DA9063_DRVNAME_LEDS, + }, + { + .name = DA9063_DRVNAME_WATCHDOG, + }, + { + .name = DA9063_DRVNAME_HWMON, + }, + { + .name = DA9063_DRVNAME_ONKEY, + }, + { + .name = DA9063_DRVNAME_RTC, + }, + { + .name = DA9063_DRVNAME_VIBRATION, + }, +}; + +int da9063_device_init(struct da9063 *da9063, unsigned int irq) +{ + struct da9063_pdata *pdata = da9063->dev->platform_data; + int model, revision; + int ret; + + if (pdata) { + da9063->flags = pdata->flags; + da9063->irq_base = pdata->irq_base; + } else { + da9063->flags = 0; + da9063->irq_base = 0; + } + da9063->chip_irq = irq; + + if (pdata && pdata->init != NULL) { + ret = pdata->init(da9063); + if (ret != 0) { + dev_err(da9063->dev, + "Platform initialization failed.\n"); + return ret; + } + } + + ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_ID, &model); + if (ret < 0) { + dev_err(da9063->dev, "Cannot read chip model id.\n"); + return -EIO; + } + if (model != PMIC_DA9063) { + dev_err(da9063->dev, "Invalid chip model id: 0x%02x\n", model); + return -ENODEV; + } + + ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_VARIANT, &revision); + if (ret < 0) { + dev_err(da9063->dev, "Cannot read chip revision id.\n"); + return -EIO; + } + revision >>= DA9063_CHIP_VARIANT_SHIFT; + if (revision != 3) { + dev_err(da9063->dev, "Unknown chip revision: %d\n", revision); + return -ENODEV; + } + + da9063->model = model; + da9063->revision = revision; + + dev_info(da9063->dev, + "Device detected (model-ID: 0x%02X rev-ID: 0x%02X)\n", + model, revision); + + ret = mfd_add_devices(da9063->dev, -1, da9063_devs, + ARRAY_SIZE(da9063_devs), NULL, da9063->irq_base, + NULL); + if (ret) + dev_err(da9063->dev, "Cannot add MFD cells\n"); + + return ret; +} + +void da9063_device_exit(struct da9063 *da9063) +{ + mfd_remove_devices(da9063->dev); +} + +MODULE_DESCRIPTION("PMIC driver for Dialog DA9063"); +MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>, Michal Hajduk <michal.hajduk@diasemi.com>"); +MODULE_LICENSE("GPL"); |