drivers/mfd/intel_soc_pmic_core.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Intel SoC PMIC MFD Driver
   4  *
   5  * Copyright (C) 2013, 2014 Intel Corporation. All rights reserved.
   6  *
   7  * Author: Yang, Bin <bin.yang@intel.com>
   8  * Author: Zhu, Lejun <lejun.zhu@linux.intel.com>
   9  */
  10
  11 #include <linux/acpi.h>
  12 #include <linux/i2c.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/module.h>
  15 #include <linux/mfd/core.h>
  16 #include <linux/mfd/intel_soc_pmic.h>
  17 #include <linux/platform_data/x86/soc.h>
  18 #include <linux/pwm.h>
  19 #include <linux/regmap.h>
  20
  21 #include "intel_soc_pmic_core.h"
  22
  23 /* PWM consumed by the Intel GFX */
  24 static struct pwm_lookup crc_pwm_lookup[] = {
  25         PWM_LOOKUP("crystal_cove_pwm", 0, "0000:00:02.0", "pwm_pmic_backlight", 0, PWM_POLARITY_NORMAL),
  26 };
  27
  28 static int intel_soc_pmic_i2c_probe(struct i2c_client *i2c,
  29                                     const struct i2c_device_id *i2c_id)
  30 {
  31         struct device *dev = &i2c->dev;
  32         struct intel_soc_pmic_config *config;
  33         struct intel_soc_pmic *pmic;
  34         int ret;
  35
  36         if (soc_intel_is_byt())
  37                 config = &intel_soc_pmic_config_byt_crc;
  38         else
  39                 config = &intel_soc_pmic_config_cht_crc;
  40
  41         pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
  42         if (!pmic)
  43                 return -ENOMEM;
  44
  45         dev_set_drvdata(dev, pmic);
  46
  47         pmic->regmap = devm_regmap_init_i2c(i2c, config->regmap_config);
  48         if (IS_ERR(pmic->regmap))
  49                 return PTR_ERR(pmic->regmap);
  50
  51         pmic->irq = i2c->irq;
  52
  53         ret = regmap_add_irq_chip(pmic->regmap, pmic->irq,
  54                                   config->irq_flags | IRQF_ONESHOT,
  55                                   0, config->irq_chip,
  56                                   &pmic->irq_chip_data);
  57         if (ret)
  58                 return ret;
  59
  60         ret = enable_irq_wake(pmic->irq);
  61         if (ret)
  62                 dev_warn(dev, "Can't enable IRQ as wake source: %d\n", ret);
  63
  64         /* Add lookup table for crc-pwm */
  65         pwm_add_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));
  66
  67         /* To distuingish this domain from the GPIO/charger's irqchip domains */
  68         irq_domain_update_bus_token(regmap_irq_get_domain(pmic->irq_chip_data),
  69                                     DOMAIN_BUS_NEXUS);
  70
  71         ret = mfd_add_devices(dev, -1, config->cell_dev,
  72                               config->n_cell_devs, NULL, 0,
  73                               regmap_irq_get_domain(pmic->irq_chip_data));
  74         if (ret)
  75                 goto err_del_irq_chip;
  76
  77         return 0;
  78
  79 err_del_irq_chip:
  80         regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data);
  81         return ret;
  82 }
  83
  84 static int intel_soc_pmic_i2c_remove(struct i2c_client *i2c)
  85 {
  86         struct intel_soc_pmic *pmic = dev_get_drvdata(&i2c->dev);
  87
  88         regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data);
  89
  90         /* remove crc-pwm lookup table */
  91         pwm_remove_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));
  92
  93         mfd_remove_devices(&i2c->dev);
  94
  95         return 0;
  96 }
  97
  98 static void intel_soc_pmic_shutdown(struct i2c_client *i2c)
  99 {
 100         struct intel_soc_pmic *pmic = dev_get_drvdata(&i2c->dev);
 101
 102         disable_irq(pmic->irq);
 103
 104         return;
 105 }
 106
 107 #if defined(CONFIG_PM_SLEEP)
 108 static int intel_soc_pmic_suspend(struct device *dev)
 109 {
 110         struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
 111
 112         disable_irq(pmic->irq);
 113
 114         return 0;
 115 }
 116
 117 static int intel_soc_pmic_resume(struct device *dev)
 118 {
 119         struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
 120
 121         enable_irq(pmic->irq);
 122
 123         return 0;
 124 }
 125 #endif
 126
 127 static SIMPLE_DEV_PM_OPS(intel_soc_pmic_pm_ops, intel_soc_pmic_suspend,
 128                          intel_soc_pmic_resume);
 129
 130 static const struct i2c_device_id intel_soc_pmic_i2c_id[] = {
 131         { }
 132 };
 133 MODULE_DEVICE_TABLE(i2c, intel_soc_pmic_i2c_id);
 134
 135 #if defined(CONFIG_ACPI)
 136 static const struct acpi_device_id intel_soc_pmic_acpi_match[] = {
 137         { "INT33FD" },
 138         { },
 139 };
 140 MODULE_DEVICE_TABLE(acpi, intel_soc_pmic_acpi_match);
 141 #endif
 142
 143 static struct i2c_driver intel_soc_pmic_i2c_driver = {
 144         .driver = {
 145                 .name = "intel_soc_pmic_i2c",
 146                 .pm = &intel_soc_pmic_pm_ops,
 147                 .acpi_match_table = ACPI_PTR(intel_soc_pmic_acpi_match),
 148         },
 149         .probe = intel_soc_pmic_i2c_probe,
 150         .remove = intel_soc_pmic_i2c_remove,
 151         .id_table = intel_soc_pmic_i2c_id,
 152         .shutdown = intel_soc_pmic_shutdown,
 153 };
 154
 155 module_i2c_driver(intel_soc_pmic_i2c_driver);
 156
 157 MODULE_DESCRIPTION("I2C driver for Intel SoC PMIC");
 158 MODULE_LICENSE("GPL v2");
 159 MODULE_AUTHOR("Yang, Bin <bin.yang@intel.com>");
 160 MODULE_AUTHOR("Zhu, Lejun <lejun.zhu@linux.intel.com>");