[mirror_ubuntu-zesty-kernel.git] / drivers / mfd / intel_soc_pmic_core.c

/*
 * intel_soc_pmic_core.c - Intel SoC PMIC MFD Driver
 *
 * Copyright (C) 2013, 2014 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * Author: Yang, Bin <bin.yang@intel.com>
 * Author: Zhu, Lejun <lejun.zhu@linux.intel.com>
 */

#include <linux/module.h>
#include <linux/mfd/core.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/gpio/consumer.h>
#include <linux/acpi.h>
#include <linux/regmap.h>
#include <linux/mfd/intel_soc_pmic.h>
#include <linux/gpio/machine.h>
#include <linux/pwm.h>
#include "intel_soc_pmic_core.h"

/* Lookup table for the Panel Enable/Disable line as GPIO signals */
static struct gpiod_lookup_table panel_gpio_table = {
	/* Intel GFX is consumer */
	.dev_id = "0000:00:02.0",
	.table = {
		/* Panel EN/DISABLE */
		GPIO_LOOKUP("gpio_crystalcove", 94, "panel", GPIO_ACTIVE_HIGH),
		{ },
	},
};

/* PWM consumed by the Intel GFX */
static struct pwm_lookup crc_pwm_lookup[] = {
	PWM_LOOKUP("crystal_cove_pwm", 0, "0000:00:02.0", "pwm_backlight", 0, PWM_POLARITY_NORMAL),
};

static int intel_soc_pmic_find_gpio_irq(struct device *dev)
{
	struct gpio_desc *desc;
	int irq;

	desc = devm_gpiod_get_index(dev, "intel_soc_pmic", 0, GPIOD_IN);
	if (IS_ERR(desc))
		return PTR_ERR(desc);

	irq = gpiod_to_irq(desc);
	if (irq < 0)
		dev_warn(dev, "Can't get irq: %d\n", irq);

	return irq;
}

static int intel_soc_pmic_i2c_probe(struct i2c_client *i2c,
				    const struct i2c_device_id *i2c_id)
{
	struct device *dev = &i2c->dev;
	const struct acpi_device_id *id;
	struct intel_soc_pmic_config *config;
	struct intel_soc_pmic *pmic;
	int ret;
	int irq;

	id = acpi_match_device(dev->driver->acpi_match_table, dev);
	if (!id || !id->driver_data)
		return -ENODEV;

	config = (struct intel_soc_pmic_config *)id->driver_data;

	pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
	if (!pmic)
		return -ENOMEM;

	dev_set_drvdata(dev, pmic);

	pmic->regmap = devm_regmap_init_i2c(i2c, config->regmap_config);

	/*
	 * On some boards the PMIC interrupt may come from a GPIO line. Try to
	 * lookup the ACPI table for a such connection and setup a GPIO
	 * interrupt if it exists. Otherwise use the IRQ provided by I2C
	 */
	irq = intel_soc_pmic_find_gpio_irq(dev);
	pmic->irq = (irq < 0) ? i2c->irq : irq;

	ret = regmap_add_irq_chip(pmic->regmap, pmic->irq,
				  config->irq_flags | IRQF_ONESHOT,
				  0, config->irq_chip,
				  &pmic->irq_chip_data);
	if (ret)
		return ret;

	ret = enable_irq_wake(pmic->irq);
	if (ret)
		dev_warn(dev, "Can't enable IRQ as wake source: %d\n", ret);

	/* Add lookup table binding for Panel Control to the GPIO Chip */
	gpiod_add_lookup_table(&panel_gpio_table);

	/* Add lookup table for crc-pwm */
	pwm_add_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));

	ret = mfd_add_devices(dev, -1, config->cell_dev,
			      config->n_cell_devs, NULL, 0,
			      regmap_irq_get_domain(pmic->irq_chip_data));
	if (ret)
		goto err_del_irq_chip;

	return 0;

err_del_irq_chip:
	regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data);
	return ret;
}

static int intel_soc_pmic_i2c_remove(struct i2c_client *i2c)
{
	struct intel_soc_pmic *pmic = dev_get_drvdata(&i2c->dev);

	regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data);

	/* Remove lookup table for Panel Control from the GPIO Chip */
	gpiod_remove_lookup_table(&panel_gpio_table);

	/* remove crc-pwm lookup table */
	pwm_remove_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));

	mfd_remove_devices(&i2c->dev);

	return 0;
}

static void intel_soc_pmic_shutdown(struct i2c_client *i2c)
{
	struct intel_soc_pmic *pmic = dev_get_drvdata(&i2c->dev);

	disable_irq(pmic->irq);

	return;
}

#if defined(CONFIG_PM_SLEEP)
static int intel_soc_pmic_suspend(struct device *dev)
{
	struct intel_soc_pmic *pmic = dev_get_drvdata(dev);

	disable_irq(pmic->irq);

	return 0;
}

static int intel_soc_pmic_resume(struct device *dev)
{
	struct intel_soc_pmic *pmic = dev_get_drvdata(dev);

	enable_irq(pmic->irq);

	return 0;
}
#endif

static SIMPLE_DEV_PM_OPS(intel_soc_pmic_pm_ops, intel_soc_pmic_suspend,
			 intel_soc_pmic_resume);

static const struct i2c_device_id intel_soc_pmic_i2c_id[] = {
	{ }
};
MODULE_DEVICE_TABLE(i2c, intel_soc_pmic_i2c_id);

#if defined(CONFIG_ACPI)
static const struct acpi_device_id intel_soc_pmic_acpi_match[] = {
	{"INT33FD", (kernel_ulong_t)&intel_soc_pmic_config_crc},
	{ },
};
MODULE_DEVICE_TABLE(acpi, intel_soc_pmic_acpi_match);
#endif

static struct i2c_driver intel_soc_pmic_i2c_driver = {
	.driver = {
		.name = "intel_soc_pmic_i2c",
		.pm = &intel_soc_pmic_pm_ops,
		.acpi_match_table = ACPI_PTR(intel_soc_pmic_acpi_match),
	},
	.probe = intel_soc_pmic_i2c_probe,
	.remove = intel_soc_pmic_i2c_remove,
	.id_table = intel_soc_pmic_i2c_id,
	.shutdown = intel_soc_pmic_shutdown,
};

module_i2c_driver(intel_soc_pmic_i2c_driver);

MODULE_DESCRIPTION("I2C driver for Intel SoC PMIC");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Yang, Bin <bin.yang@intel.com>");
MODULE_AUTHOR("Zhu, Lejun <lejun.zhu@linux.intel.com>");
Commit	Line	Data
51652384 ZL	1	/*
	2	* intel_soc_pmic_core.c - Intel SoC PMIC MFD Driver
	3	*
	4	* Copyright (C) 2013, 2014 Intel Corporation. All rights reserved.
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License version
	8	* 2 as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* Author: Yang, Bin <bin.yang@intel.com>
	16	* Author: Zhu, Lejun <lejun.zhu@linux.intel.com>
	17	*/
	18
	19	#include <linux/module.h>
	20	#include <linux/mfd/core.h>
	21	#include <linux/i2c.h>
	22	#include <linux/interrupt.h>
	23	#include <linux/gpio/consumer.h>
	24	#include <linux/acpi.h>
	25	#include <linux/regmap.h>
	26	#include <linux/mfd/intel_soc_pmic.h>
61dd2ca2	27	#include <linux/gpio/machine.h>
a3aa9a93	28	#include <linux/pwm.h>
51652384 ZL	29	#include "intel_soc_pmic_core.h"
51652384 ZL	30
61dd2ca2 SK	31	/* Lookup table for the Panel Enable/Disable line as GPIO signals */
	32	static struct gpiod_lookup_table panel_gpio_table = {
	33	/* Intel GFX is consumer */
	34	.dev_id = "0000:00:02.0",
	35	.table = {
	36	/* Panel EN/DISABLE */
	37	GPIO_LOOKUP("gpio_crystalcove", 94, "panel", GPIO_ACTIVE_HIGH),
36e6d081	38	{ },
61dd2ca2 SK	39	},
	40	};
	41
a3aa9a93 SK	42	/* PWM consumed by the Intel GFX */
	43	static struct pwm_lookup crc_pwm_lookup[] = {
	44	PWM_LOOKUP("crystal_cove_pwm", 0, "0000:00:02.0", "pwm_backlight", 0, PWM_POLARITY_NORMAL),
	45	};
	46
51652384 ZL	47	static int intel_soc_pmic_find_gpio_irq(struct device *dev)
	48	{
	49	struct gpio_desc *desc;
	50	int irq;
	51
9dc50219	52	desc = devm_gpiod_get_index(dev, "intel_soc_pmic", 0, GPIOD_IN);
51652384	53	if (IS_ERR(desc))
ad7b5a17	54	return PTR_ERR(desc);
51652384 ZL	55
	56	irq = gpiod_to_irq(desc);
	57	if (irq < 0)
	58	dev_warn(dev, "Can't get irq: %d\n", irq);
	59
	60	return irq;
	61	}
	62
	63	static int intel_soc_pmic_i2c_probe(struct i2c_client *i2c,
	64	const struct i2c_device_id *i2c_id)
	65	{
	66	struct device *dev = &i2c->dev;
	67	const struct acpi_device_id *id;
	68	struct intel_soc_pmic_config *config;
	69	struct intel_soc_pmic *pmic;
	70	int ret;
	71	int irq;
	72
	73	id = acpi_match_device(dev->driver->acpi_match_table, dev);
	74	if (!id \|\| !id->driver_data)
	75	return -ENODEV;
	76
	77	config = (struct intel_soc_pmic_config *)id->driver_data;
	78
	79	pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
0a65fbf6 KP	80	if (!pmic)
	81	return -ENOMEM;
	82
51652384 ZL	83	dev_set_drvdata(dev, pmic);
	84
	85	pmic->regmap = devm_regmap_init_i2c(i2c, config->regmap_config);
	86
9c98dcb0 JN	87	/*
	88	* On some boards the PMIC interrupt may come from a GPIO line. Try to
	89	* lookup the ACPI table for a such connection and setup a GPIO
	90	* interrupt if it exists. Otherwise use the IRQ provided by I2C
	91	*/
51652384 ZL	92	irq = intel_soc_pmic_find_gpio_irq(dev);
	93	pmic->irq = (irq < 0) ? i2c->irq : irq;
	94
	95	ret = regmap_add_irq_chip(pmic->regmap, pmic->irq,
	96	config->irq_flags \| IRQF_ONESHOT,
	97	0, config->irq_chip,
	98	&pmic->irq_chip_data);
	99	if (ret)
	100	return ret;
	101
	102	ret = enable_irq_wake(pmic->irq);
	103	if (ret)
	104	dev_warn(dev, "Can't enable IRQ as wake source: %d\n", ret);
	105
61dd2ca2 SK	106	/* Add lookup table binding for Panel Control to the GPIO Chip */
	107	gpiod_add_lookup_table(&panel_gpio_table);
	108
a3aa9a93 SK	109	/* Add lookup table for crc-pwm */
	110	pwm_add_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));
	111
51652384 ZL	112	ret = mfd_add_devices(dev, -1, config->cell_dev,
	113	config->n_cell_devs, NULL, 0,
	114	regmap_irq_get_domain(pmic->irq_chip_data));
	115	if (ret)
	116	goto err_del_irq_chip;
	117
	118	return 0;
	119
	120	err_del_irq_chip:
	121	regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data);
	122	return ret;
	123	}
	124
	125	static int intel_soc_pmic_i2c_remove(struct i2c_client *i2c)
	126	{
	127	struct intel_soc_pmic *pmic = dev_get_drvdata(&i2c->dev);
	128
	129	regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data);
	130
61dd2ca2 SK	131	/* Remove lookup table for Panel Control from the GPIO Chip */
	132	gpiod_remove_lookup_table(&panel_gpio_table);
	133
a3aa9a93 SK	134	/* remove crc-pwm lookup table */
	135	pwm_remove_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));
	136
51652384 ZL	137	mfd_remove_devices(&i2c->dev);
	138
	139	return 0;
	140	}
	141
	142	static void intel_soc_pmic_shutdown(struct i2c_client *i2c)
	143	{
	144	struct intel_soc_pmic *pmic = dev_get_drvdata(&i2c->dev);
	145
	146	disable_irq(pmic->irq);
	147
	148	return;
	149	}
	150
bdaf6703	151	#if defined(CONFIG_PM_SLEEP)
51652384 ZL	152	static int intel_soc_pmic_suspend(struct device *dev)
	153	{
	154	struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
	155
	156	disable_irq(pmic->irq);
	157
	158	return 0;
	159	}
	160
	161	static int intel_soc_pmic_resume(struct device *dev)
	162	{
	163	struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
	164
	165	enable_irq(pmic->irq);
	166
	167	return 0;
	168	}
bdaf6703	169	#endif
51652384 ZL	170
	171	static SIMPLE_DEV_PM_OPS(intel_soc_pmic_pm_ops, intel_soc_pmic_suspend,
	172	intel_soc_pmic_resume);
	173
	174	static const struct i2c_device_id intel_soc_pmic_i2c_id[] = {
	175	{ }
	176	};
	177	MODULE_DEVICE_TABLE(i2c, intel_soc_pmic_i2c_id);
	178
52764fd9	179	#if defined(CONFIG_ACPI)
c465875a	180	static const struct acpi_device_id intel_soc_pmic_acpi_match[] = {
51652384 ZL	181	{"INT33FD", (kernel_ulong_t)&intel_soc_pmic_config_crc},
	182	{ },
	183	};
	184	MODULE_DEVICE_TABLE(acpi, intel_soc_pmic_acpi_match);
52764fd9	185	#endif
51652384 ZL	186
	187	static struct i2c_driver intel_soc_pmic_i2c_driver = {
	188	.driver = {
	189	.name = "intel_soc_pmic_i2c",
51652384 ZL	190	.pm = &intel_soc_pmic_pm_ops,
	191	.acpi_match_table = ACPI_PTR(intel_soc_pmic_acpi_match),
	192	},
	193	.probe = intel_soc_pmic_i2c_probe,
	194	.remove = intel_soc_pmic_i2c_remove,
	195	.id_table = intel_soc_pmic_i2c_id,
	196	.shutdown = intel_soc_pmic_shutdown,
	197	};
	198
	199	module_i2c_driver(intel_soc_pmic_i2c_driver);
	200
	201	MODULE_DESCRIPTION("I2C driver for Intel SoC PMIC");
	202	MODULE_LICENSE("GPL v2");
	203	MODULE_AUTHOR("Yang, Bin <bin.yang@intel.com>");
	204	MODULE_AUTHOR("Zhu, Lejun <lejun.zhu@linux.intel.com>");