[deliverable/linux.git] / drivers / mfd / da9063-core.c

/*
 * 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 resource da9063_regulators_resources[] = {
	{
		.name	= "LDO_LIM",
		.start	= DA9063_IRQ_LDO_LIM,
		.end	= DA9063_IRQ_LDO_LIM,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct resource da9063_rtc_resources[] = {
	{
		.name	= "ALARM",
		.start	= DA9063_IRQ_ALARM,
		.end	= DA9063_IRQ_ALARM,
		.flags	= IORESOURCE_IRQ,
	},
	{
		.name	= "TICK",
		.start	= DA9063_IRQ_TICK,
		.end	= DA9063_IRQ_TICK,
		.flags	= IORESOURCE_IRQ,
	}
};

static struct resource da9063_onkey_resources[] = {
	{
		.start	= DA9063_IRQ_ONKEY,
		.end	= DA9063_IRQ_ONKEY,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct resource da9063_hwmon_resources[] = {
	{
		.start	= DA9063_IRQ_ADC_RDY,
		.end	= DA9063_IRQ_ADC_RDY,
		.flags	= IORESOURCE_IRQ,
	},
};


static struct mfd_cell da9063_devs[] = {
	{
		.name		= DA9063_DRVNAME_REGULATORS,
		.num_resources	= ARRAY_SIZE(da9063_regulators_resources),
		.resources	= da9063_regulators_resources,
	},
	{
		.name		= DA9063_DRVNAME_LEDS,
	},
	{
		.name		= DA9063_DRVNAME_WATCHDOG,
	},
	{
		.name		= DA9063_DRVNAME_HWMON,
		.num_resources	= ARRAY_SIZE(da9063_hwmon_resources),
		.resources	= da9063_hwmon_resources,
	},
	{
		.name		= DA9063_DRVNAME_ONKEY,
		.num_resources	= ARRAY_SIZE(da9063_onkey_resources),
		.resources	= da9063_onkey_resources,
	},
	{
		.name		= DA9063_DRVNAME_RTC,
		.num_resources	= ARRAY_SIZE(da9063_rtc_resources),
		.resources	= da9063_rtc_resources,
	},
	{
		.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 = da9063_irq_init(da9063);
	if (ret) {
		dev_err(da9063->dev, "Cannot initialize interrupts.\n");
		return ret;
	}

	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);
	da9063_irq_exit(da9063);
}

MODULE_DESCRIPTION("PMIC driver for Dialog DA9063");
MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>, Michal Hajduk <michal.hajduk@diasemi.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
8e685483 KG	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
a0e08b86 KG	37	static struct resource da9063_regulators_resources[] = {
	38	{
	39	.name = "LDO_LIM",
	40	.start = DA9063_IRQ_LDO_LIM,
	41	.end = DA9063_IRQ_LDO_LIM,
	42	.flags = IORESOURCE_IRQ,
	43	},
	44	};
	45
	46	static struct resource da9063_rtc_resources[] = {
	47	{
	48	.name = "ALARM",
	49	.start = DA9063_IRQ_ALARM,
	50	.end = DA9063_IRQ_ALARM,
	51	.flags = IORESOURCE_IRQ,
	52	},
	53	{
	54	.name = "TICK",
	55	.start = DA9063_IRQ_TICK,
	56	.end = DA9063_IRQ_TICK,
	57	.flags = IORESOURCE_IRQ,
	58	}
	59	};
	60
	61	static struct resource da9063_onkey_resources[] = {
	62	{
	63	.start = DA9063_IRQ_ONKEY,
	64	.end = DA9063_IRQ_ONKEY,
	65	.flags = IORESOURCE_IRQ,
	66	},
	67	};
	68
	69	static struct resource da9063_hwmon_resources[] = {
	70	{
	71	.start = DA9063_IRQ_ADC_RDY,
	72	.end = DA9063_IRQ_ADC_RDY,
	73	.flags = IORESOURCE_IRQ,
	74	},
	75	};
	76
	77
8e685483 KG	78	static struct mfd_cell da9063_devs[] = {
	79	{
	80	.name = DA9063_DRVNAME_REGULATORS,
a0e08b86 KG	81	.num_resources = ARRAY_SIZE(da9063_regulators_resources),
a0e08b86 KG	82	.resources = da9063_regulators_resources,
8e685483 KG	83	},
	84	{
	85	.name = DA9063_DRVNAME_LEDS,
	86	},
	87	{
	88	.name = DA9063_DRVNAME_WATCHDOG,
	89	},
	90	{
	91	.name = DA9063_DRVNAME_HWMON,
a0e08b86 KG	92	.num_resources = ARRAY_SIZE(da9063_hwmon_resources),
a0e08b86 KG	93	.resources = da9063_hwmon_resources,
8e685483 KG	94	},
	95	{
	96	.name = DA9063_DRVNAME_ONKEY,
a0e08b86 KG	97	.num_resources = ARRAY_SIZE(da9063_onkey_resources),
a0e08b86 KG	98	.resources = da9063_onkey_resources,
8e685483 KG	99	},
	100	{
	101	.name = DA9063_DRVNAME_RTC,
a0e08b86 KG	102	.num_resources = ARRAY_SIZE(da9063_rtc_resources),
a0e08b86 KG	103	.resources = da9063_rtc_resources,
8e685483 KG	104	},
	105	{
	106	.name = DA9063_DRVNAME_VIBRATION,
	107	},
	108	};
	109
	110	int da9063_device_init(struct da9063 *da9063, unsigned int irq)
	111	{
	112	struct da9063_pdata *pdata = da9063->dev->platform_data;
	113	int model, revision;
	114	int ret;
	115
	116	if (pdata) {
	117	da9063->flags = pdata->flags;
	118	da9063->irq_base = pdata->irq_base;
	119	} else {
	120	da9063->flags = 0;
	121	da9063->irq_base = 0;
	122	}
	123	da9063->chip_irq = irq;
	124
	125	if (pdata && pdata->init != NULL) {
	126	ret = pdata->init(da9063);
	127	if (ret != 0) {
	128	dev_err(da9063->dev,
	129	"Platform initialization failed.\n");
	130	return ret;
	131	}
	132	}
	133
	134	ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_ID, &model);
	135	if (ret < 0) {
	136	dev_err(da9063->dev, "Cannot read chip model id.\n");
	137	return -EIO;
	138	}
	139	if (model != PMIC_DA9063) {
	140	dev_err(da9063->dev, "Invalid chip model id: 0x%02x\n", model);
	141	return -ENODEV;
	142	}
	143
	144	ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_VARIANT, &revision);
	145	if (ret < 0) {
	146	dev_err(da9063->dev, "Cannot read chip revision id.\n");
	147	return -EIO;
	148	}
	149	revision >>= DA9063_CHIP_VARIANT_SHIFT;
	150	if (revision != 3) {
	151	dev_err(da9063->dev, "Unknown chip revision: %d\n", revision);
	152	return -ENODEV;
	153	}
	154
	155	da9063->model = model;
	156	da9063->revision = revision;
	157
	158	dev_info(da9063->dev,
	159	"Device detected (model-ID: 0x%02X rev-ID: 0x%02X)\n",
	160	model, revision);
	161
a0e08b86 KG	162	ret = da9063_irq_init(da9063);
	163	if (ret) {
	164	dev_err(da9063->dev, "Cannot initialize interrupts.\n");
	165	return ret;
	166	}
	167
8e685483 KG	168	ret = mfd_add_devices(da9063->dev, -1, da9063_devs,
	169	ARRAY_SIZE(da9063_devs), NULL, da9063->irq_base,
	170	NULL);
	171	if (ret)
	172	dev_err(da9063->dev, "Cannot add MFD cells\n");
	173
	174	return ret;
	175	}
	176
	177	void da9063_device_exit(struct da9063 *da9063)
	178	{
	179	mfd_remove_devices(da9063->dev);
a0e08b86	180	da9063_irq_exit(da9063);
8e685483 KG	181	}
	182
	183	MODULE_DESCRIPTION("PMIC driver for Dialog DA9063");
	184	MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>, Michal Hajduk <michal.hajduk@diasemi.com>");
	185	MODULE_LICENSE("GPL");