[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, Dialog Semiconductor
 * Author: Michal Hajduk, Dialog Semiconductor
 *
 *  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[] = {
	{
		.name	= "ONKEY",
		.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 const 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,
		.of_compatible	= "dlg,da9063-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,
		.of_compatible = "dlg,da9063-onkey",
	},
	{
		.name		= DA9063_DRVNAME_RTC,
		.num_resources	= ARRAY_SIZE(da9063_rtc_resources),
		.resources	= da9063_rtc_resources,
		.of_compatible	= "dlg,da9063-rtc",
	},
	{
		.name		= DA9063_DRVNAME_VIBRATION,
	},
};

static int da9063_clear_fault_log(struct da9063 *da9063)
{
	int ret = 0;
	int fault_log = 0;

	ret = regmap_read(da9063->regmap, DA9063_REG_FAULT_LOG, &fault_log);
	if (ret < 0) {
		dev_err(da9063->dev, "Cannot read FAULT_LOG.\n");
		return -EIO;
	}

	if (fault_log) {
		if (fault_log & DA9063_TWD_ERROR)
			dev_dbg(da9063->dev,
				"Fault log entry detected: DA9063_TWD_ERROR\n");
		if (fault_log & DA9063_POR)
			dev_dbg(da9063->dev,
				"Fault log entry detected: DA9063_POR\n");
		if (fault_log & DA9063_VDD_FAULT)
			dev_dbg(da9063->dev,
				"Fault log entry detected: DA9063_VDD_FAULT\n");
		if (fault_log & DA9063_VDD_START)
			dev_dbg(da9063->dev,
				"Fault log entry detected: DA9063_VDD_START\n");
		if (fault_log & DA9063_TEMP_CRIT)
			dev_dbg(da9063->dev,
				"Fault log entry detected: DA9063_TEMP_CRIT\n");
		if (fault_log & DA9063_KEY_RESET)
			dev_dbg(da9063->dev,
				"Fault log entry detected: DA9063_KEY_RESET\n");
		if (fault_log & DA9063_NSHUTDOWN)
			dev_dbg(da9063->dev,
				"Fault log entry detected: DA9063_NSHUTDOWN\n");
		if (fault_log & DA9063_WAIT_SHUT)
			dev_dbg(da9063->dev,
				"Fault log entry detected: DA9063_WAIT_SHUT\n");
	}

	ret = regmap_write(da9063->regmap,
			   DA9063_REG_FAULT_LOG,
			   fault_log);
	if (ret < 0)
		dev_err(da9063->dev,
			"Cannot reset FAULT_LOG values %d\n", ret);

	return ret;
}

int da9063_device_init(struct da9063 *da9063, unsigned int irq)
{
	struct da9063_pdata *pdata = da9063->dev->platform_data;
	int model, variant_id, variant_code;
	int ret;

	ret = da9063_clear_fault_log(da9063);
	if (ret < 0)
		dev_err(da9063->dev, "Cannot clear fault log\n");

	if (pdata) {
		da9063->flags = pdata->flags;
		da9063->irq_base = pdata->irq_base;
	} else {
		da9063->flags = 0;
		da9063->irq_base = -1;
	}
	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, &variant_id);
	if (ret < 0) {
		dev_err(da9063->dev, "Cannot read chip variant id.\n");
		return -EIO;
	}

	variant_code = variant_id >> DA9063_CHIP_VARIANT_SHIFT;

	dev_info(da9063->dev,
		 "Device detected (chip-ID: 0x%02X, var-ID: 0x%02X)\n",
		 model, variant_id);

	if (variant_code < PMIC_DA9063_BB && variant_code != PMIC_DA9063_AD) {
		dev_err(da9063->dev,
			"Cannot support variant code: 0x%02X\n", variant_code);
		return -ENODEV;
	}

	da9063->model = model;
	da9063->variant_code = variant_code;

	ret = da9063_irq_init(da9063);
	if (ret) {
		dev_err(da9063->dev, "Cannot initialize interrupts.\n");
		return ret;
	}

	da9063->irq_base = regmap_irq_chip_get_base(da9063->regmap_irq);

	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");
MODULE_AUTHOR("Michal Hajduk");
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	*
37778d83 ST	7	* Author: Krystian Garbaciak, Dialog Semiconductor
37778d83 ST	8	* Author: Michal Hajduk, Dialog Semiconductor
8e685483 KG	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	{
9011e4a8	63	.name = "ONKEY",
a0e08b86 KG	64	.start = DA9063_IRQ_ONKEY,
	65	.end = DA9063_IRQ_ONKEY,
	66	.flags = IORESOURCE_IRQ,
	67	},
	68	};
	69
	70	static struct resource da9063_hwmon_resources[] = {
	71	{
	72	.start = DA9063_IRQ_ADC_RDY,
	73	.end = DA9063_IRQ_ADC_RDY,
	74	.flags = IORESOURCE_IRQ,
	75	},
	76	};
	77
	78
c8f675ff	79	static const struct mfd_cell da9063_devs[] = {
8e685483 KG	80	{
8e685483 KG	81	.name = DA9063_DRVNAME_REGULATORS,
a0e08b86 KG	82	.num_resources = ARRAY_SIZE(da9063_regulators_resources),
a0e08b86 KG	83	.resources = da9063_regulators_resources,
8e685483 KG	84	},
	85	{
	86	.name = DA9063_DRVNAME_LEDS,
	87	},
	88	{
	89	.name = DA9063_DRVNAME_WATCHDOG,
71e03de4	90	.of_compatible = "dlg,da9063-watchdog",
8e685483 KG	91	},
	92	{
	93	.name = DA9063_DRVNAME_HWMON,
a0e08b86 KG	94	.num_resources = ARRAY_SIZE(da9063_hwmon_resources),
a0e08b86 KG	95	.resources = da9063_hwmon_resources,
8e685483 KG	96	},
	97	{
	98	.name = DA9063_DRVNAME_ONKEY,
a0e08b86 KG	99	.num_resources = ARRAY_SIZE(da9063_onkey_resources),
a0e08b86 KG	100	.resources = da9063_onkey_resources,
9011e4a8	101	.of_compatible = "dlg,da9063-onkey",
8e685483 KG	102	},
	103	{
	104	.name = DA9063_DRVNAME_RTC,
a0e08b86 KG	105	.num_resources = ARRAY_SIZE(da9063_rtc_resources),
a0e08b86 KG	106	.resources = da9063_rtc_resources,
71e03de4	107	.of_compatible = "dlg,da9063-rtc",
8e685483 KG	108	},
	109	{
	110	.name = DA9063_DRVNAME_VIBRATION,
	111	},
	112	};
	113
9011e4a8 ST	114	static int da9063_clear_fault_log(struct da9063 *da9063)
	115	{
	116	int ret = 0;
	117	int fault_log = 0;
	118
	119	ret = regmap_read(da9063->regmap, DA9063_REG_FAULT_LOG, &fault_log);
	120	if (ret < 0) {
	121	dev_err(da9063->dev, "Cannot read FAULT_LOG.\n");
	122	return -EIO;
	123	}
	124
	125	if (fault_log) {
	126	if (fault_log & DA9063_TWD_ERROR)
	127	dev_dbg(da9063->dev,
	128	"Fault log entry detected: DA9063_TWD_ERROR\n");
	129	if (fault_log & DA9063_POR)
	130	dev_dbg(da9063->dev,
	131	"Fault log entry detected: DA9063_POR\n");
	132	if (fault_log & DA9063_VDD_FAULT)
	133	dev_dbg(da9063->dev,
	134	"Fault log entry detected: DA9063_VDD_FAULT\n");
	135	if (fault_log & DA9063_VDD_START)
	136	dev_dbg(da9063->dev,
	137	"Fault log entry detected: DA9063_VDD_START\n");
	138	if (fault_log & DA9063_TEMP_CRIT)
	139	dev_dbg(da9063->dev,
	140	"Fault log entry detected: DA9063_TEMP_CRIT\n");
	141	if (fault_log & DA9063_KEY_RESET)
	142	dev_dbg(da9063->dev,
	143	"Fault log entry detected: DA9063_KEY_RESET\n");
	144	if (fault_log & DA9063_NSHUTDOWN)
	145	dev_dbg(da9063->dev,
	146	"Fault log entry detected: DA9063_NSHUTDOWN\n");
	147	if (fault_log & DA9063_WAIT_SHUT)
	148	dev_dbg(da9063->dev,
	149	"Fault log entry detected: DA9063_WAIT_SHUT\n");
	150	}
	151
	152	ret = regmap_write(da9063->regmap,
	153	DA9063_REG_FAULT_LOG,
	154	fault_log);
	155	if (ret < 0)
	156	dev_err(da9063->dev,
	157	"Cannot reset FAULT_LOG values %d\n", ret);
	158
	159	return ret;
	160	}
	161
8e685483 KG	162	int da9063_device_init(struct da9063 *da9063, unsigned int irq)
	163	{
	164	struct da9063_pdata *pdata = da9063->dev->platform_data;
c1d12c78	165	int model, variant_id, variant_code;
8e685483 KG	166	int ret;
8e685483 KG	167
9011e4a8 ST	168	ret = da9063_clear_fault_log(da9063);
	169	if (ret < 0)
	170	dev_err(da9063->dev, "Cannot clear fault log\n");
	171
8e685483 KG	172	if (pdata) {
	173	da9063->flags = pdata->flags;
	174	da9063->irq_base = pdata->irq_base;
	175	} else {
	176	da9063->flags = 0;
439b8bdd	177	da9063->irq_base = -1;
8e685483 KG	178	}
	179	da9063->chip_irq = irq;
	180
	181	if (pdata && pdata->init != NULL) {
	182	ret = pdata->init(da9063);
	183	if (ret != 0) {
	184	dev_err(da9063->dev,
	185	"Platform initialization failed.\n");
	186	return ret;
	187	}
	188	}
	189
	190	ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_ID, &model);
	191	if (ret < 0) {
	192	dev_err(da9063->dev, "Cannot read chip model id.\n");
	193	return -EIO;
	194	}
	195	if (model != PMIC_DA9063) {
	196	dev_err(da9063->dev, "Invalid chip model id: 0x%02x\n", model);
	197	return -ENODEV;
	198	}
	199
c1d12c78	200	ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_VARIANT, &variant_id);
8e685483	201	if (ret < 0) {
c1d12c78	202	dev_err(da9063->dev, "Cannot read chip variant id.\n");
8e685483 KG	203	return -EIO;
8e685483 KG	204	}
c1d12c78 OST	205
	206	variant_code = variant_id >> DA9063_CHIP_VARIANT_SHIFT;
	207
	208	dev_info(da9063->dev,
	209	"Device detected (chip-ID: 0x%02X, var-ID: 0x%02X)\n",
	210	model, variant_id);
	211
9cb42e2a OST	212	if (variant_code < PMIC_DA9063_BB && variant_code != PMIC_DA9063_AD) {
	213	dev_err(da9063->dev,
	214	"Cannot support variant code: 0x%02X\n", variant_code);
8e685483 KG	215	return -ENODEV;
	216	}
	217
	218	da9063->model = model;
c1d12c78	219	da9063->variant_code = variant_code;
8e685483	220
a0e08b86 KG	221	ret = da9063_irq_init(da9063);
	222	if (ret) {
	223	dev_err(da9063->dev, "Cannot initialize interrupts.\n");
	224	return ret;
	225	}
	226
439b8bdd DL	227	da9063->irq_base = regmap_irq_chip_get_base(da9063->regmap_irq);
439b8bdd DL	228
8e685483 KG	229	ret = mfd_add_devices(da9063->dev, -1, da9063_devs,
	230	ARRAY_SIZE(da9063_devs), NULL, da9063->irq_base,
	231	NULL);
	232	if (ret)
	233	dev_err(da9063->dev, "Cannot add MFD cells\n");
	234
	235	return ret;
	236	}
	237
	238	void da9063_device_exit(struct da9063 *da9063)
	239	{
	240	mfd_remove_devices(da9063->dev);
a0e08b86	241	da9063_irq_exit(da9063);
8e685483 KG	242	}
	243
	244	MODULE_DESCRIPTION("PMIC driver for Dialog DA9063");
37778d83 ST	245	MODULE_AUTHOR("Krystian Garbaciak");
37778d83 ST	246	MODULE_AUTHOR("Michal Hajduk");
8e685483	247	MODULE_LICENSE("GPL");