drivers/mfd/intel_soc_pmic_core.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * Intel SoC PMIC MFD Driver
0004  *
0005  * Copyright (C) 2013, 2014 Intel Corporation. All rights reserved.
0006  *
0007  * Author: Yang, Bin <bin.yang@intel.com>
0008  * Author: Zhu, Lejun <lejun.zhu@linux.intel.com>
0009  */
0010
0011 #include <linux/acpi.h>
0012 #include <linux/i2c.h>
0013 #include <linux/interrupt.h>
0014 #include <linux/module.h>
0015 #include <linux/mfd/core.h>
0016 #include <linux/mfd/intel_soc_pmic.h>
0017 #include <linux/platform_data/x86/soc.h>
0018 #include <linux/pwm.h>
0019 #include <linux/regmap.h>
0020
0021 #include "intel_soc_pmic_core.h"
0022
0023 /* PWM consumed by the Intel GFX */
0024 static struct pwm_lookup crc_pwm_lookup[] = {
0025     PWM_LOOKUP("crystal_cove_pwm", 0, "0000:00:02.0", "pwm_pmic_backlight", 0, PWM_POLARITY_NORMAL),
0026 };
0027
0028 static int intel_soc_pmic_i2c_probe(struct i2c_client *i2c,
0029                     const struct i2c_device_id *i2c_id)
0030 {
0031     struct device *dev = &i2c->dev;
0032     struct intel_soc_pmic_config *config;
0033     struct intel_soc_pmic *pmic;
0034     int ret;
0035
0036     if (soc_intel_is_byt())
0037         config = &intel_soc_pmic_config_byt_crc;
0038     else
0039         config = &intel_soc_pmic_config_cht_crc;
0040
0041     pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
0042     if (!pmic)
0043         return -ENOMEM;
0044
0045     dev_set_drvdata(dev, pmic);
0046
0047     pmic->regmap = devm_regmap_init_i2c(i2c, config->regmap_config);
0048     if (IS_ERR(pmic->regmap))
0049         return PTR_ERR(pmic->regmap);
0050
0051     pmic->irq = i2c->irq;
0052
0053     ret = regmap_add_irq_chip(pmic->regmap, pmic->irq,
0054                   config->irq_flags | IRQF_ONESHOT,
0055                   0, config->irq_chip,
0056                   &pmic->irq_chip_data);
0057     if (ret)
0058         return ret;
0059
0060     ret = enable_irq_wake(pmic->irq);
0061     if (ret)
0062         dev_warn(dev, "Can't enable IRQ as wake source: %d\n", ret);
0063
0064     /* Add lookup table for crc-pwm */
0065     pwm_add_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));
0066
0067     /* To distuingish this domain from the GPIO/charger's irqchip domains */
0068     irq_domain_update_bus_token(regmap_irq_get_domain(pmic->irq_chip_data),
0069                     DOMAIN_BUS_NEXUS);
0070
0071     ret = mfd_add_devices(dev, -1, config->cell_dev,
0072                   config->n_cell_devs, NULL, 0,
0073                   regmap_irq_get_domain(pmic->irq_chip_data));
0074     if (ret)
0075         goto err_del_irq_chip;
0076
0077     return 0;
0078
0079 err_del_irq_chip:
0080     regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data);
0081     return ret;
0082 }
0083
0084 static int intel_soc_pmic_i2c_remove(struct i2c_client *i2c)
0085 {
0086     struct intel_soc_pmic *pmic = dev_get_drvdata(&i2c->dev);
0087
0088     regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data);
0089
0090     /* remove crc-pwm lookup table */
0091     pwm_remove_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));
0092
0093     mfd_remove_devices(&i2c->dev);
0094
0095     return 0;
0096 }
0097
0098 static void intel_soc_pmic_shutdown(struct i2c_client *i2c)
0099 {
0100     struct intel_soc_pmic *pmic = dev_get_drvdata(&i2c->dev);
0101
0102     disable_irq(pmic->irq);
0103
0104     return;
0105 }
0106
0107 #if defined(CONFIG_PM_SLEEP)
0108 static int intel_soc_pmic_suspend(struct device *dev)
0109 {
0110     struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
0111
0112     disable_irq(pmic->irq);
0113
0114     return 0;
0115 }
0116
0117 static int intel_soc_pmic_resume(struct device *dev)
0118 {
0119     struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
0120
0121     enable_irq(pmic->irq);
0122
0123     return 0;
0124 }
0125 #endif
0126
0127 static SIMPLE_DEV_PM_OPS(intel_soc_pmic_pm_ops, intel_soc_pmic_suspend,
0128              intel_soc_pmic_resume);
0129
0130 static const struct i2c_device_id intel_soc_pmic_i2c_id[] = {
0131     { }
0132 };
0133 MODULE_DEVICE_TABLE(i2c, intel_soc_pmic_i2c_id);
0134
0135 #if defined(CONFIG_ACPI)
0136 static const struct acpi_device_id intel_soc_pmic_acpi_match[] = {
0137     { "INT33FD" },
0138     { },
0139 };
0140 MODULE_DEVICE_TABLE(acpi, intel_soc_pmic_acpi_match);
0141 #endif
0142
0143 static struct i2c_driver intel_soc_pmic_i2c_driver = {
0144     .driver = {
0145         .name = "intel_soc_pmic_i2c",
0146         .pm = &intel_soc_pmic_pm_ops,
0147         .acpi_match_table = ACPI_PTR(intel_soc_pmic_acpi_match),
0148     },
0149     .probe = intel_soc_pmic_i2c_probe,
0150     .remove = intel_soc_pmic_i2c_remove,
0151     .id_table = intel_soc_pmic_i2c_id,
0152     .shutdown = intel_soc_pmic_shutdown,
0153 };
0154
0155 module_i2c_driver(intel_soc_pmic_i2c_driver);
0156
0157 MODULE_DESCRIPTION("I2C driver for Intel SoC PMIC");
0158 MODULE_LICENSE("GPL v2");
0159 MODULE_AUTHOR("Yang, Bin <bin.yang@intel.com>");
0160 MODULE_AUTHOR("Zhu, Lejun <lejun.zhu@linux.intel.com>");