drivers/mfd/intel_soc_pmic_chtdc_ti.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Device access for Dollar Cove TI PMIC
   4  *
   5  * Copyright (c) 2014, Intel Corporation.
   6  *   Author: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
   7  *
   8  * Cleanup and forward-ported
   9  *   Copyright (c) 2017 Takashi Iwai <tiwai@suse.de>
  10  */
  11
  12 #include <linux/acpi.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/i2c.h>
  15 #include <linux/mfd/core.h>
  16 #include <linux/mfd/intel_soc_pmic.h>
  17 #include <linux/module.h>
  18 #include <linux/regmap.h>
  19
  20 #define CHTDC_TI_IRQLVL1        0x01
  21 #define CHTDC_TI_MASK_IRQLVL1   0x02
  22
  23 /* Level 1 IRQs */
  24 enum {
  25         CHTDC_TI_PWRBTN = 0,    /* power button */
  26         CHTDC_TI_DIETMPWARN,    /* thermal */
  27         CHTDC_TI_ADCCMPL,       /* ADC */
  28         /* No IRQ 3 */
  29         CHTDC_TI_VBATLOW = 4,   /* battery */
  30         CHTDC_TI_VBUSDET,       /* power source */
  31         /* No IRQ 6 */
  32         CHTDC_TI_CCEOCAL = 7,   /* battery */
  33 };
  34
  35 static const struct resource power_button_resources[] = {
  36         DEFINE_RES_IRQ(CHTDC_TI_PWRBTN),
  37 };
  38
  39 static const struct resource thermal_resources[] = {
  40         DEFINE_RES_IRQ(CHTDC_TI_DIETMPWARN),
  41 };
  42
  43 static const struct resource adc_resources[] = {
  44         DEFINE_RES_IRQ(CHTDC_TI_ADCCMPL),
  45 };
  46
  47 static const struct resource pwrsrc_resources[] = {
  48         DEFINE_RES_IRQ(CHTDC_TI_VBUSDET),
  49 };
  50
  51 static const struct resource battery_resources[] = {
  52         DEFINE_RES_IRQ(CHTDC_TI_VBATLOW),
  53         DEFINE_RES_IRQ(CHTDC_TI_CCEOCAL),
  54 };
  55
  56 static struct mfd_cell chtdc_ti_dev[] = {
  57         {
  58                 .name = "chtdc_ti_pwrbtn",
  59                 .num_resources = ARRAY_SIZE(power_button_resources),
  60                 .resources = power_button_resources,
  61         }, {
  62                 .name = "chtdc_ti_adc",
  63                 .num_resources = ARRAY_SIZE(adc_resources),
  64                 .resources = adc_resources,
  65         }, {
  66                 .name = "chtdc_ti_thermal",
  67                 .num_resources = ARRAY_SIZE(thermal_resources),
  68                 .resources = thermal_resources,
  69         }, {
  70                 .name = "chtdc_ti_pwrsrc",
  71                 .num_resources = ARRAY_SIZE(pwrsrc_resources),
  72                 .resources = pwrsrc_resources,
  73         }, {
  74                 .name = "chtdc_ti_battery",
  75                 .num_resources = ARRAY_SIZE(battery_resources),
  76                 .resources = battery_resources,
  77         },
  78         {       .name = "chtdc_ti_region", },
  79 };
  80
  81 static const struct regmap_config chtdc_ti_regmap_config = {
  82         .reg_bits = 8,
  83         .val_bits = 8,
  84         .max_register = 128,
  85         .cache_type = REGCACHE_NONE,
  86 };
  87
  88 static const struct regmap_irq chtdc_ti_irqs[] = {
  89         REGMAP_IRQ_REG(CHTDC_TI_PWRBTN, 0, BIT(CHTDC_TI_PWRBTN)),
  90         REGMAP_IRQ_REG(CHTDC_TI_DIETMPWARN, 0, BIT(CHTDC_TI_DIETMPWARN)),
  91         REGMAP_IRQ_REG(CHTDC_TI_ADCCMPL, 0, BIT(CHTDC_TI_ADCCMPL)),
  92         REGMAP_IRQ_REG(CHTDC_TI_VBATLOW, 0, BIT(CHTDC_TI_VBATLOW)),
  93         REGMAP_IRQ_REG(CHTDC_TI_VBUSDET, 0, BIT(CHTDC_TI_VBUSDET)),
  94         REGMAP_IRQ_REG(CHTDC_TI_CCEOCAL, 0, BIT(CHTDC_TI_CCEOCAL)),
  95 };
  96
  97 static const struct regmap_irq_chip chtdc_ti_irq_chip = {
  98         .name = KBUILD_MODNAME,
  99         .irqs = chtdc_ti_irqs,
 100         .num_irqs = ARRAY_SIZE(chtdc_ti_irqs),
 101         .num_regs = 1,
 102         .status_base = CHTDC_TI_IRQLVL1,
 103         .mask_base = CHTDC_TI_MASK_IRQLVL1,
 104         .ack_base = CHTDC_TI_IRQLVL1,
 105 };
 106
 107 static int chtdc_ti_probe(struct i2c_client *i2c)
 108 {
 109         struct device *dev = &i2c->dev;
 110         struct intel_soc_pmic *pmic;
 111         int ret;
 112
 113         pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
 114         if (!pmic)
 115                 return -ENOMEM;
 116
 117         i2c_set_clientdata(i2c, pmic);
 118
 119         pmic->regmap = devm_regmap_init_i2c(i2c, &chtdc_ti_regmap_config);
 120         if (IS_ERR(pmic->regmap))
 121                 return PTR_ERR(pmic->regmap);
 122         pmic->irq = i2c->irq;
 123
 124         ret = devm_regmap_add_irq_chip(dev, pmic->regmap, pmic->irq,
 125                                        IRQF_ONESHOT, 0,
 126                                        &chtdc_ti_irq_chip,
 127                                        &pmic->irq_chip_data);
 128         if (ret)
 129                 return ret;
 130
 131         return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, chtdc_ti_dev,
 132                                     ARRAY_SIZE(chtdc_ti_dev), NULL, 0,
 133                                     regmap_irq_get_domain(pmic->irq_chip_data));
 134 }
 135
 136 static void chtdc_ti_shutdown(struct i2c_client *i2c)
 137 {
 138         struct intel_soc_pmic *pmic = i2c_get_clientdata(i2c);
 139
 140         disable_irq(pmic->irq);
 141 }
 142
 143 static int chtdc_ti_suspend(struct device *dev)
 144 {
 145         struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
 146
 147         disable_irq(pmic->irq);
 148
 149         return 0;
 150 }
 151
 152 static int chtdc_ti_resume(struct device *dev)
 153 {
 154         struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
 155
 156         enable_irq(pmic->irq);
 157
 158         return 0;
 159 }
 160
 161 static DEFINE_SIMPLE_DEV_PM_OPS(chtdc_ti_pm_ops, chtdc_ti_suspend, chtdc_ti_resume);
 162
 163 static const struct acpi_device_id chtdc_ti_acpi_ids[] = {
 164         { "INT33F5" },
 165         { },
 166 };
 167 MODULE_DEVICE_TABLE(acpi, chtdc_ti_acpi_ids);
 168
 169 static struct i2c_driver chtdc_ti_i2c_driver = {
 170         .driver = {
 171                 .name = "intel_soc_pmic_chtdc_ti",
 172                 .pm = pm_sleep_ptr(&chtdc_ti_pm_ops),
 173                 .acpi_match_table = chtdc_ti_acpi_ids,
 174         },
 175         .probe = chtdc_ti_probe,
 176         .shutdown = chtdc_ti_shutdown,
 177 };
 178 module_i2c_driver(chtdc_ti_i2c_driver);
 179
 180 MODULE_DESCRIPTION("I2C driver for Intel SoC Dollar Cove TI PMIC");
 181 MODULE_LICENSE("GPL v2");