[linux-2.6-block.git] / drivers / mfd / intel_soc_pmic_core.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Intel SoC PMIC MFD Driver
 *
 * Copyright (C) 2013, 2014 Intel Corporation. All rights reserved.
 *
 * Author: Yang, Bin <bin.yang@intel.com>
 * Author: Zhu, Lejun <lejun.zhu@linux.intel.com>
 */

#include <linux/acpi.h>
#include <linux/gpio/consumer.h>
#include <linux/gpio/machine.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/mfd/core.h>
#include <linux/mfd/intel_soc_pmic.h>
#include <linux/pwm.h>
#include <linux/regmap.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
26c7e05a	1	// SPDX-License-Identifier: GPL-2.0
51652384	2	/*
26c7e05a	3	* Intel SoC PMIC MFD Driver
51652384 ZL	4	*
	5	* Copyright (C) 2013, 2014 Intel Corporation. All rights reserved.
	6	*
51652384 ZL	7	* Author: Yang, Bin <bin.yang@intel.com>
	8	* Author: Zhu, Lejun <lejun.zhu@linux.intel.com>
	9	*/
	10
51eeee8e AS	11	#include <linux/acpi.h>
	12	#include <linux/gpio/consumer.h>
	13	#include <linux/gpio/machine.h>
51652384 ZL	14	#include <linux/i2c.h>
51652384 ZL	15	#include <linux/interrupt.h>
51eeee8e AS	16	#include <linux/module.h>
51eeee8e AS	17	#include <linux/mfd/core.h>
51652384	18	#include <linux/mfd/intel_soc_pmic.h>
a3aa9a93	19	#include <linux/pwm.h>
51eeee8e AS	20	#include <linux/regmap.h>
51eeee8e AS	21
51652384 ZL	22	#include "intel_soc_pmic_core.h"
51652384 ZL	23
b01e9348 HG	24	/* Crystal Cove PMIC shares same ACPI ID between different platforms */
	25	#define BYT_CRC_HRV 2
	26	#define CHT_CRC_HRV 3
	27
61dd2ca2 SK	28	/* Lookup table for the Panel Enable/Disable line as GPIO signals */
	29	static struct gpiod_lookup_table panel_gpio_table = {
	30	/* Intel GFX is consumer */
	31	.dev_id = "0000:00:02.0",
	32	.table = {
	33	/* Panel EN/DISABLE */
	34	GPIO_LOOKUP("gpio_crystalcove", 94, "panel", GPIO_ACTIVE_HIGH),
36e6d081	35	{ },
61dd2ca2 SK	36	},
	37	};
	38
a3aa9a93 SK	39	/* PWM consumed by the Intel GFX */
	40	static struct pwm_lookup crc_pwm_lookup[] = {
	41	PWM_LOOKUP("crystal_cove_pwm", 0, "0000:00:02.0", "pwm_backlight", 0, PWM_POLARITY_NORMAL),
	42	};
	43
51652384 ZL	44	static int intel_soc_pmic_i2c_probe(struct i2c_client *i2c,
	45	const struct i2c_device_id *i2c_id)
	46	{
	47	struct device *dev = &i2c->dev;
51652384 ZL	48	struct intel_soc_pmic_config *config;
51652384 ZL	49	struct intel_soc_pmic *pmic;
b01e9348 HG	50	unsigned long long hrv;
b01e9348 HG	51	acpi_status status;
51652384	52	int ret;
51652384	53
b01e9348 HG	54	/*
	55	* There are 2 different Crystal Cove PMICs a Bay Trail and Cherry
	56	* Trail version, use _HRV to differentiate between the 2.
	57	*/
	58	status = acpi_evaluate_integer(ACPI_HANDLE(dev), "_HRV", NULL, &hrv);
	59	if (ACPI_FAILURE(status)) {
	60	dev_err(dev, "Failed to get PMIC hardware revision\n");
51652384	61	return -ENODEV;
b01e9348 HG	62	}
	63
	64	switch (hrv) {
	65	case BYT_CRC_HRV:
	66	config = &intel_soc_pmic_config_byt_crc;
	67	break;
	68	case CHT_CRC_HRV:
	69	config = &intel_soc_pmic_config_cht_crc;
	70	break;
	71	default:
	72	dev_warn(dev, "Unknown hardware rev %llu, assuming BYT\n", hrv);
	73	config = &intel_soc_pmic_config_byt_crc;
	74	}
51652384 ZL	75
51652384 ZL	76	pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
0a65fbf6 KP	77	if (!pmic)
	78	return -ENOMEM;
	79
51652384 ZL	80	dev_set_drvdata(dev, pmic);
	81
	82	pmic->regmap = devm_regmap_init_i2c(i2c, config->regmap_config);
db43b8d0 PB	83	if (IS_ERR(pmic->regmap))
	84	return PTR_ERR(pmic->regmap);
	85
159ee757	86	pmic->irq = i2c->irq;
51652384 ZL	87
	88	ret = regmap_add_irq_chip(pmic->regmap, pmic->irq,
	89	config->irq_flags \| IRQF_ONESHOT,
	90	0, config->irq_chip,
	91	&pmic->irq_chip_data);
	92	if (ret)
	93	return ret;
	94
	95	ret = enable_irq_wake(pmic->irq);
	96	if (ret)
	97	dev_warn(dev, "Can't enable IRQ as wake source: %d\n", ret);
	98
61dd2ca2 SK	99	/* Add lookup table binding for Panel Control to the GPIO Chip */
	100	gpiod_add_lookup_table(&panel_gpio_table);
	101
a3aa9a93 SK	102	/* Add lookup table for crc-pwm */
	103	pwm_add_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));
	104
51652384 ZL	105	ret = mfd_add_devices(dev, -1, config->cell_dev,
	106	config->n_cell_devs, NULL, 0,
	107	regmap_irq_get_domain(pmic->irq_chip_data));
	108	if (ret)
	109	goto err_del_irq_chip;
	110
	111	return 0;
	112
	113	err_del_irq_chip:
	114	regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data);
	115	return ret;
	116	}
	117
	118	static int intel_soc_pmic_i2c_remove(struct i2c_client *i2c)
	119	{
	120	struct intel_soc_pmic *pmic = dev_get_drvdata(&i2c->dev);
	121
	122	regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data);
	123
61dd2ca2 SK	124	/* Remove lookup table for Panel Control from the GPIO Chip */
	125	gpiod_remove_lookup_table(&panel_gpio_table);
	126
a3aa9a93 SK	127	/* remove crc-pwm lookup table */
	128	pwm_remove_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));
	129
51652384 ZL	130	mfd_remove_devices(&i2c->dev);
	131
	132	return 0;
	133	}
	134
	135	static void intel_soc_pmic_shutdown(struct i2c_client *i2c)
	136	{
	137	struct intel_soc_pmic *pmic = dev_get_drvdata(&i2c->dev);
	138
	139	disable_irq(pmic->irq);
	140
	141	return;
	142	}
	143
bdaf6703	144	#if defined(CONFIG_PM_SLEEP)
51652384 ZL	145	static int intel_soc_pmic_suspend(struct device *dev)
	146	{
	147	struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
	148
	149	disable_irq(pmic->irq);
	150
	151	return 0;
	152	}
	153
	154	static int intel_soc_pmic_resume(struct device *dev)
	155	{
	156	struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
	157
	158	enable_irq(pmic->irq);
	159
	160	return 0;
	161	}
bdaf6703	162	#endif
51652384 ZL	163
	164	static SIMPLE_DEV_PM_OPS(intel_soc_pmic_pm_ops, intel_soc_pmic_suspend,
	165	intel_soc_pmic_resume);
	166
	167	static const struct i2c_device_id intel_soc_pmic_i2c_id[] = {
	168	{ }
	169	};
	170	MODULE_DEVICE_TABLE(i2c, intel_soc_pmic_i2c_id);
	171
52764fd9	172	#if defined(CONFIG_ACPI)
c465875a	173	static const struct acpi_device_id intel_soc_pmic_acpi_match[] = {
b01e9348	174	{ "INT33FD" },
51652384 ZL	175	{ },
	176	};
	177	MODULE_DEVICE_TABLE(acpi, intel_soc_pmic_acpi_match);
52764fd9	178	#endif
51652384 ZL	179
	180	static struct i2c_driver intel_soc_pmic_i2c_driver = {
	181	.driver = {
	182	.name = "intel_soc_pmic_i2c",
51652384 ZL	183	.pm = &intel_soc_pmic_pm_ops,
	184	.acpi_match_table = ACPI_PTR(intel_soc_pmic_acpi_match),
	185	},
	186	.probe = intel_soc_pmic_i2c_probe,
	187	.remove = intel_soc_pmic_i2c_remove,
	188	.id_table = intel_soc_pmic_i2c_id,
	189	.shutdown = intel_soc_pmic_shutdown,
	190	};
	191
	192	module_i2c_driver(intel_soc_pmic_i2c_driver);
	193
	194	MODULE_DESCRIPTION("I2C driver for Intel SoC PMIC");
	195	MODULE_LICENSE("GPL v2");
	196	MODULE_AUTHOR("Yang, Bin <bin.yang@intel.com>");
	197	MODULE_AUTHOR("Zhu, Lejun <lejun.zhu@linux.intel.com>");