[mirror_ubuntu-bionic-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/acpi.h>
#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"

/* Crystal Cove PMIC shares same ACPI ID between different platforms */
#define BYT_CRC_HRV		2
#define CHT_CRC_HRV		3

/* 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_i2c_probe(struct i2c_client *i2c,
				    const struct i2c_device_id *i2c_id)
{
	struct device *dev = &i2c->dev;
	struct intel_soc_pmic_config *config;
	struct intel_soc_pmic *pmic;
	unsigned long long hrv;
	acpi_status status;
	int ret;

	/*
	 * There are 2 different Crystal Cove PMICs a Bay Trail and Cherry
	 * Trail version, use _HRV to differentiate between the 2.
	 */
	status = acpi_evaluate_integer(ACPI_HANDLE(dev), "_HRV", NULL, &hrv);
	if (ACPI_FAILURE(status)) {
		dev_err(dev, "Failed to get PMIC hardware revision\n");
		return -ENODEV;
	}

	switch (hrv) {
	case BYT_CRC_HRV:
		config = &intel_soc_pmic_config_byt_crc;
		break;
	case CHT_CRC_HRV:
		config = &intel_soc_pmic_config_cht_crc;
		break;
	default:
		dev_warn(dev, "Unknown hardware rev %llu, assuming BYT\n", hrv);
		config = &intel_soc_pmic_config_byt_crc;
	}

	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);
	if (IS_ERR(pmic->regmap))
		return PTR_ERR(pmic->regmap);

	pmic->irq = i2c->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" },
	{ },
};
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
b01e9348	19	#include <linux/acpi.h>
51652384 ZL	20	#include <linux/module.h>
	21	#include <linux/mfd/core.h>
	22	#include <linux/i2c.h>
	23	#include <linux/interrupt.h>
	24	#include <linux/gpio/consumer.h>
	25	#include <linux/acpi.h>
	26	#include <linux/regmap.h>
	27	#include <linux/mfd/intel_soc_pmic.h>
61dd2ca2	28	#include <linux/gpio/machine.h>
a3aa9a93	29	#include <linux/pwm.h>
51652384 ZL	30	#include "intel_soc_pmic_core.h"
51652384 ZL	31
b01e9348 HG	32	/* Crystal Cove PMIC shares same ACPI ID between different platforms */
	33	#define BYT_CRC_HRV 2
	34	#define CHT_CRC_HRV 3
	35
61dd2ca2 SK	36	/* Lookup table for the Panel Enable/Disable line as GPIO signals */
	37	static struct gpiod_lookup_table panel_gpio_table = {
	38	/* Intel GFX is consumer */
	39	.dev_id = "0000:00:02.0",
	40	.table = {
	41	/* Panel EN/DISABLE */
	42	GPIO_LOOKUP("gpio_crystalcove", 94, "panel", GPIO_ACTIVE_HIGH),
36e6d081	43	{ },
61dd2ca2 SK	44	},
	45	};
	46
a3aa9a93 SK	47	/* PWM consumed by the Intel GFX */
	48	static struct pwm_lookup crc_pwm_lookup[] = {
	49	PWM_LOOKUP("crystal_cove_pwm", 0, "0000:00:02.0", "pwm_backlight", 0, PWM_POLARITY_NORMAL),
	50	};
	51
51652384 ZL	52	static int intel_soc_pmic_i2c_probe(struct i2c_client *i2c,
	53	const struct i2c_device_id *i2c_id)
	54	{
	55	struct device *dev = &i2c->dev;
51652384 ZL	56	struct intel_soc_pmic_config *config;
51652384 ZL	57	struct intel_soc_pmic *pmic;
b01e9348 HG	58	unsigned long long hrv;
b01e9348 HG	59	acpi_status status;
51652384	60	int ret;
51652384	61
b01e9348 HG	62	/*
	63	* There are 2 different Crystal Cove PMICs a Bay Trail and Cherry
	64	* Trail version, use _HRV to differentiate between the 2.
	65	*/
	66	status = acpi_evaluate_integer(ACPI_HANDLE(dev), "_HRV", NULL, &hrv);
	67	if (ACPI_FAILURE(status)) {
	68	dev_err(dev, "Failed to get PMIC hardware revision\n");
51652384	69	return -ENODEV;
b01e9348 HG	70	}
	71
	72	switch (hrv) {
	73	case BYT_CRC_HRV:
	74	config = &intel_soc_pmic_config_byt_crc;
	75	break;
	76	case CHT_CRC_HRV:
	77	config = &intel_soc_pmic_config_cht_crc;
	78	break;
	79	default:
	80	dev_warn(dev, "Unknown hardware rev %llu, assuming BYT\n", hrv);
	81	config = &intel_soc_pmic_config_byt_crc;
	82	}
51652384 ZL	83
51652384 ZL	84	pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
0a65fbf6 KP	85	if (!pmic)
	86	return -ENOMEM;
	87
51652384 ZL	88	dev_set_drvdata(dev, pmic);
	89
	90	pmic->regmap = devm_regmap_init_i2c(i2c, config->regmap_config);
db43b8d0 PB	91	if (IS_ERR(pmic->regmap))
	92	return PTR_ERR(pmic->regmap);
	93
159ee757	94	pmic->irq = i2c->irq;
51652384 ZL	95
	96	ret = regmap_add_irq_chip(pmic->regmap, pmic->irq,
	97	config->irq_flags \| IRQF_ONESHOT,
	98	0, config->irq_chip,
	99	&pmic->irq_chip_data);
	100	if (ret)
	101	return ret;
	102
	103	ret = enable_irq_wake(pmic->irq);
	104	if (ret)
	105	dev_warn(dev, "Can't enable IRQ as wake source: %d\n", ret);
	106
61dd2ca2 SK	107	/* Add lookup table binding for Panel Control to the GPIO Chip */
	108	gpiod_add_lookup_table(&panel_gpio_table);
	109
a3aa9a93 SK	110	/* Add lookup table for crc-pwm */
	111	pwm_add_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));
	112
51652384 ZL	113	ret = mfd_add_devices(dev, -1, config->cell_dev,
	114	config->n_cell_devs, NULL, 0,
	115	regmap_irq_get_domain(pmic->irq_chip_data));
	116	if (ret)
	117	goto err_del_irq_chip;
	118
	119	return 0;
	120
	121	err_del_irq_chip:
	122	regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data);
	123	return ret;
	124	}
	125
	126	static int intel_soc_pmic_i2c_remove(struct i2c_client *i2c)
	127	{
	128	struct intel_soc_pmic *pmic = dev_get_drvdata(&i2c->dev);
	129
	130	regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data);
	131
61dd2ca2 SK	132	/* Remove lookup table for Panel Control from the GPIO Chip */
	133	gpiod_remove_lookup_table(&panel_gpio_table);
	134
a3aa9a93 SK	135	/* remove crc-pwm lookup table */
	136	pwm_remove_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));
	137
51652384 ZL	138	mfd_remove_devices(&i2c->dev);
	139
	140	return 0;
	141	}
	142
	143	static void intel_soc_pmic_shutdown(struct i2c_client *i2c)
	144	{
	145	struct intel_soc_pmic *pmic = dev_get_drvdata(&i2c->dev);
	146
	147	disable_irq(pmic->irq);
	148
	149	return;
	150	}
	151
bdaf6703	152	#if defined(CONFIG_PM_SLEEP)
51652384 ZL	153	static int intel_soc_pmic_suspend(struct device *dev)
	154	{
	155	struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
	156
	157	disable_irq(pmic->irq);
	158
	159	return 0;
	160	}
	161
	162	static int intel_soc_pmic_resume(struct device *dev)
	163	{
	164	struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
	165
	166	enable_irq(pmic->irq);
	167
	168	return 0;
	169	}
bdaf6703	170	#endif
51652384 ZL	171
	172	static SIMPLE_DEV_PM_OPS(intel_soc_pmic_pm_ops, intel_soc_pmic_suspend,
	173	intel_soc_pmic_resume);
	174
	175	static const struct i2c_device_id intel_soc_pmic_i2c_id[] = {
	176	{ }
	177	};
	178	MODULE_DEVICE_TABLE(i2c, intel_soc_pmic_i2c_id);
	179
52764fd9	180	#if defined(CONFIG_ACPI)
c465875a	181	static const struct acpi_device_id intel_soc_pmic_acpi_match[] = {
b01e9348	182	{ "INT33FD" },
51652384 ZL	183	{ },
	184	};
	185	MODULE_DEVICE_TABLE(acpi, intel_soc_pmic_acpi_match);
52764fd9	186	#endif
51652384 ZL	187
	188	static struct i2c_driver intel_soc_pmic_i2c_driver = {
	189	.driver = {
	190	.name = "intel_soc_pmic_i2c",
51652384 ZL	191	.pm = &intel_soc_pmic_pm_ops,
	192	.acpi_match_table = ACPI_PTR(intel_soc_pmic_acpi_match),
	193	},
	194	.probe = intel_soc_pmic_i2c_probe,
	195	.remove = intel_soc_pmic_i2c_remove,
	196	.id_table = intel_soc_pmic_i2c_id,
	197	.shutdown = intel_soc_pmic_shutdown,
	198	};
	199
	200	module_i2c_driver(intel_soc_pmic_i2c_driver);
	201
	202	MODULE_DESCRIPTION("I2C driver for Intel SoC PMIC");
	203	MODULE_LICENSE("GPL v2");
	204	MODULE_AUTHOR("Yang, Bin <bin.yang@intel.com>");
	205	MODULE_AUTHOR("Zhu, Lejun <lejun.zhu@linux.intel.com>");