2 * intel_soc_pmic_core.c - Intel SoC PMIC MFD Driver
4 * Copyright (C) 2013, 2014 Intel Corporation. All rights reserved.
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.
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.
15 * Author: Yang, Bin <bin.yang@intel.com>
16 * Author: Zhu, Lejun <lejun.zhu@linux.intel.com>
19 #include <linux/acpi.h>
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>
28 #include <linux/gpio/machine.h>
29 #include <linux/pwm.h>
30 #include "intel_soc_pmic_core.h"
32 /* Crystal Cove PMIC shares same ACPI ID between different platforms */
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",
41 /* Panel EN/DISABLE */
42 GPIO_LOOKUP("gpio_crystalcove", 94, "panel", GPIO_ACTIVE_HIGH),
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),
52 static int intel_soc_pmic_i2c_probe(struct i2c_client *i2c,
53 const struct i2c_device_id *i2c_id)
55 struct device *dev = &i2c->dev;
56 struct intel_soc_pmic_config *config;
57 struct intel_soc_pmic *pmic;
58 unsigned long long hrv;
63 * There are 2 different Crystal Cove PMICs a Bay Trail and Cherry
64 * Trail version, use _HRV to differentiate between the 2.
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");
74 config = &intel_soc_pmic_config_byt_crc;
77 config = &intel_soc_pmic_config_cht_crc;
80 dev_warn(dev, "Unknown hardware rev %llu, assuming BYT\n", hrv);
81 config = &intel_soc_pmic_config_byt_crc;
84 pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
88 dev_set_drvdata(dev, pmic);
90 pmic->regmap = devm_regmap_init_i2c(i2c, config->regmap_config);
91 if (IS_ERR(pmic->regmap))
92 return PTR_ERR(pmic->regmap);
96 ret = regmap_add_irq_chip(pmic->regmap, pmic->irq,
97 config->irq_flags | IRQF_ONESHOT,
99 &pmic->irq_chip_data);
103 ret = enable_irq_wake(pmic->irq);
105 dev_warn(dev, "Can't enable IRQ as wake source: %d\n", ret);
107 /* Add lookup table binding for Panel Control to the GPIO Chip */
108 gpiod_add_lookup_table(&panel_gpio_table);
110 /* Add lookup table for crc-pwm */
111 pwm_add_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));
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));
117 goto err_del_irq_chip;
122 regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data);
126 static int intel_soc_pmic_i2c_remove(struct i2c_client *i2c)
128 struct intel_soc_pmic *pmic = dev_get_drvdata(&i2c->dev);
130 regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data);
132 /* Remove lookup table for Panel Control from the GPIO Chip */
133 gpiod_remove_lookup_table(&panel_gpio_table);
135 /* remove crc-pwm lookup table */
136 pwm_remove_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));
138 mfd_remove_devices(&i2c->dev);
143 static void intel_soc_pmic_shutdown(struct i2c_client *i2c)
145 struct intel_soc_pmic *pmic = dev_get_drvdata(&i2c->dev);
147 disable_irq(pmic->irq);
152 #if defined(CONFIG_PM_SLEEP)
153 static int intel_soc_pmic_suspend(struct device *dev)
155 struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
157 disable_irq(pmic->irq);
162 static int intel_soc_pmic_resume(struct device *dev)
164 struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
166 enable_irq(pmic->irq);
172 static SIMPLE_DEV_PM_OPS(intel_soc_pmic_pm_ops, intel_soc_pmic_suspend,
173 intel_soc_pmic_resume);
175 static const struct i2c_device_id intel_soc_pmic_i2c_id[] = {
178 MODULE_DEVICE_TABLE(i2c, intel_soc_pmic_i2c_id);
180 #if defined(CONFIG_ACPI)
181 static const struct acpi_device_id intel_soc_pmic_acpi_match[] = {
185 MODULE_DEVICE_TABLE(acpi, intel_soc_pmic_acpi_match);
188 static struct i2c_driver intel_soc_pmic_i2c_driver = {
190 .name = "intel_soc_pmic_i2c",
191 .pm = &intel_soc_pmic_pm_ops,
192 .acpi_match_table = ACPI_PTR(intel_soc_pmic_acpi_match),
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,
200 module_i2c_driver(intel_soc_pmic_i2c_driver);
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>");