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 <[email protected]>
   8  * Author: Zhu, Lejun <[email protected]>
   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         ret = mfd_add_devices(dev, -1, config->cell_dev,
  68                               config->n_cell_devs, NULL, 0,
  69                               regmap_irq_get_domain(pmic->irq_chip_data));
  70         if (ret)
  71                 goto err_del_irq_chip;
  72
  73         return 0;
  74
  75 err_del_irq_chip:
  76         regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data);
  77         return ret;
  78 }
  79
  80 static int intel_soc_pmic_i2c_remove(struct i2c_client *i2c)
  81 {
  82         struct intel_soc_pmic *pmic = dev_get_drvdata(&i2c->dev);
  83
  84         regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data);
  85
  86         /* remove crc-pwm lookup table */
  87         pwm_remove_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));
  88
  89         mfd_remove_devices(&i2c->dev);
  90
  91         return 0;
  92 }
  93
  94 static void intel_soc_pmic_shutdown(struct i2c_client *i2c)
  95 {
  96         struct intel_soc_pmic *pmic = dev_get_drvdata(&i2c->dev);
  97
  98         disable_irq(pmic->irq);
  99
 100         return;
 101 }
 102
 103 #if defined(CONFIG_PM_SLEEP)
 104 static int intel_soc_pmic_suspend(struct device *dev)
 105 {
 106         struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
 107
 108         disable_irq(pmic->irq);
 109
 110         return 0;
 111 }
 112
 113 static int intel_soc_pmic_resume(struct device *dev)
 114 {
 115         struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
 116
 117         enable_irq(pmic->irq);
 118
 119         return 0;
 120 }
 121 #endif
 122
 123 static SIMPLE_DEV_PM_OPS(intel_soc_pmic_pm_ops, intel_soc_pmic_suspend,
 124                          intel_soc_pmic_resume);
 125
 126 static const struct i2c_device_id intel_soc_pmic_i2c_id[] = {
 127         { }
 128 };
 129 MODULE_DEVICE_TABLE(i2c, intel_soc_pmic_i2c_id);
 130
 131 #if defined(CONFIG_ACPI)
 132 static const struct acpi_device_id intel_soc_pmic_acpi_match[] = {
 133         { "INT33FD" },
 134         { },
 135 };
 136 MODULE_DEVICE_TABLE(acpi, intel_soc_pmic_acpi_match);
 137 #endif
 138
 139 static struct i2c_driver intel_soc_pmic_i2c_driver = {
 140         .driver = {
 141                 .name = "intel_soc_pmic_i2c",
 142                 .pm = &intel_soc_pmic_pm_ops,
 143                 .acpi_match_table = ACPI_PTR(intel_soc_pmic_acpi_match),
 144         },
 145         .probe = intel_soc_pmic_i2c_probe,
 146         .remove = intel_soc_pmic_i2c_remove,
 147         .id_table = intel_soc_pmic_i2c_id,
 148         .shutdown = intel_soc_pmic_shutdown,
 149 };
 150
 151 module_i2c_driver(intel_soc_pmic_i2c_driver);
 152
 153 MODULE_DESCRIPTION("I2C driver for Intel SoC PMIC");
 154 MODULE_LICENSE("GPL v2");
 155 MODULE_AUTHOR("Yang, Bin <[email protected]>");
 156 MODULE_AUTHOR("Zhu, Lejun <[email protected]>");