drivers/mfd/intel_soc_pmic_chtdc_ti.c

   1 /*
   2  * Device access for Dollar Cove TI PMIC
   3  *
   4  * Copyright (c) 2014, Intel Corporation.
   5  *   Author: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
   6  *
   7  * Cleanup and forward-ported
   8  *   Copyright (c) 2017 Takashi Iwai <tiwai@suse.de>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 #include <linux/acpi.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/i2c.h>
  18 #include <linux/mfd/core.h>
  19 #include <linux/mfd/intel_soc_pmic.h>
  20 #include <linux/module.h>
  21 #include <linux/regmap.h>
  22
  23 #define CHTDC_TI_IRQLVL1        0x01
  24 #define CHTDC_TI_MASK_IRQLVL1   0x02
  25
  26 /* Level 1 IRQs */
  27 enum {
  28         CHTDC_TI_PWRBTN = 0,    /* power button */
  29         CHTDC_TI_DIETMPWARN,    /* thermal */
  30         CHTDC_TI_ADCCMPL,       /* ADC */
  31         /* No IRQ 3 */
  32         CHTDC_TI_VBATLOW = 4,   /* battery */
  33         CHTDC_TI_VBUSDET,       /* power source */
  34         /* No IRQ 6 */
  35         CHTDC_TI_CCEOCAL = 7,   /* battery */
  36 };
  37
  38 static struct resource power_button_resources[] = {
  39         DEFINE_RES_IRQ(CHTDC_TI_PWRBTN),
  40 };
  41
  42 static struct resource thermal_resources[] = {
  43         DEFINE_RES_IRQ(CHTDC_TI_DIETMPWARN),
  44 };
  45
  46 static struct resource adc_resources[] = {
  47         DEFINE_RES_IRQ(CHTDC_TI_ADCCMPL),
  48 };
  49
  50 static struct resource pwrsrc_resources[] = {
  51         DEFINE_RES_IRQ(CHTDC_TI_VBUSDET),
  52 };
  53
  54 static struct resource battery_resources[] = {
  55         DEFINE_RES_IRQ(CHTDC_TI_VBATLOW),
  56         DEFINE_RES_IRQ(CHTDC_TI_CCEOCAL),
  57 };
  58
  59 static struct mfd_cell chtdc_ti_dev[] = {
  60         {
  61                 .name = "chtdc_ti_pwrbtn",
  62                 .num_resources = ARRAY_SIZE(power_button_resources),
  63                 .resources = power_button_resources,
  64         }, {
  65                 .name = "chtdc_ti_adc",
  66                 .num_resources = ARRAY_SIZE(adc_resources),
  67                 .resources = adc_resources,
  68         }, {
  69                 .name = "chtdc_ti_thermal",
  70                 .num_resources = ARRAY_SIZE(thermal_resources),
  71                 .resources = thermal_resources,
  72         }, {
  73                 .name = "chtdc_ti_pwrsrc",
  74                 .num_resources = ARRAY_SIZE(pwrsrc_resources),
  75                 .resources = pwrsrc_resources,
  76         }, {
  77                 .name = "chtdc_ti_battery",
  78                 .num_resources = ARRAY_SIZE(battery_resources),
  79                 .resources = battery_resources,
  80         },
  81         {       .name = "chtdc_ti_region", },
  82 };
  83
  84 static const struct regmap_config chtdc_ti_regmap_config = {
  85         .reg_bits = 8,
  86         .val_bits = 8,
  87         .max_register = 128,
  88         .cache_type = REGCACHE_NONE,
  89 };
  90
  91 static const struct regmap_irq chtdc_ti_irqs[] = {
  92         REGMAP_IRQ_REG(CHTDC_TI_PWRBTN, 0, BIT(CHTDC_TI_PWRBTN)),
  93         REGMAP_IRQ_REG(CHTDC_TI_DIETMPWARN, 0, BIT(CHTDC_TI_DIETMPWARN)),
  94         REGMAP_IRQ_REG(CHTDC_TI_ADCCMPL, 0, BIT(CHTDC_TI_ADCCMPL)),
  95         REGMAP_IRQ_REG(CHTDC_TI_VBATLOW, 0, BIT(CHTDC_TI_VBATLOW)),
  96         REGMAP_IRQ_REG(CHTDC_TI_VBUSDET, 0, BIT(CHTDC_TI_VBUSDET)),
  97         REGMAP_IRQ_REG(CHTDC_TI_CCEOCAL, 0, BIT(CHTDC_TI_CCEOCAL)),
  98 };
  99
 100 static const struct regmap_irq_chip chtdc_ti_irq_chip = {
 101         .name = KBUILD_MODNAME,
 102         .irqs = chtdc_ti_irqs,
 103         .num_irqs = ARRAY_SIZE(chtdc_ti_irqs),
 104         .num_regs = 1,
 105         .status_base = CHTDC_TI_IRQLVL1,
 106         .mask_base = CHTDC_TI_MASK_IRQLVL1,
 107         .ack_base = CHTDC_TI_IRQLVL1,
 108 };
 109
 110 static int chtdc_ti_probe(struct i2c_client *i2c)
 111 {
 112         struct device *dev = &i2c->dev;
 113         struct intel_soc_pmic *pmic;
 114         int ret;
 115
 116         pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
 117         if (!pmic)
 118                 return -ENOMEM;
 119
 120         i2c_set_clientdata(i2c, pmic);
 121
 122         pmic->regmap = devm_regmap_init_i2c(i2c, &chtdc_ti_regmap_config);
 123         if (IS_ERR(pmic->regmap))
 124                 return PTR_ERR(pmic->regmap);
 125         pmic->irq = i2c->irq;
 126
 127         ret = devm_regmap_add_irq_chip(dev, pmic->regmap, pmic->irq,
 128                                        IRQF_ONESHOT, 0,
 129                                        &chtdc_ti_irq_chip,
 130                                        &pmic->irq_chip_data);
 131         if (ret)
 132                 return ret;
 133
 134         return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, chtdc_ti_dev,
 135                                     ARRAY_SIZE(chtdc_ti_dev), NULL, 0,
 136                                     regmap_irq_get_domain(pmic->irq_chip_data));
 137 }
 138
 139 static void chtdc_ti_shutdown(struct i2c_client *i2c)
 140 {
 141         struct intel_soc_pmic *pmic = i2c_get_clientdata(i2c);
 142
 143         disable_irq(pmic->irq);
 144 }
 145
 146 static int __maybe_unused chtdc_ti_suspend(struct device *dev)
 147 {
 148         struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
 149
 150         disable_irq(pmic->irq);
 151
 152         return 0;
 153 }
 154
 155 static int __maybe_unused chtdc_ti_resume(struct device *dev)
 156 {
 157         struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
 158
 159         enable_irq(pmic->irq);
 160
 161         return 0;
 162 }
 163
 164 static SIMPLE_DEV_PM_OPS(chtdc_ti_pm_ops, chtdc_ti_suspend, chtdc_ti_resume);
 165
 166 static const struct acpi_device_id chtdc_ti_acpi_ids[] = {
 167         { "INT33F5" },
 168         { },
 169 };
 170 MODULE_DEVICE_TABLE(acpi, chtdc_ti_acpi_ids);
 171
 172 static struct i2c_driver chtdc_ti_i2c_driver = {
 173         .driver = {
 174                 .name = "intel_soc_pmic_chtdc_ti",
 175                 .pm = &chtdc_ti_pm_ops,
 176                 .acpi_match_table = chtdc_ti_acpi_ids,
 177         },
 178         .probe_new = chtdc_ti_probe,
 179         .shutdown = chtdc_ti_shutdown,
 180 };
 181 module_i2c_driver(chtdc_ti_i2c_driver);
 182
 183 MODULE_DESCRIPTION("I2C driver for Intel SoC Dollar Cove TI PMIC");
 184 MODULE_LICENSE("GPL v2");