drivers/mfd/rt5120.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2022 Richtek Technology Corp.
   4  * Author: ChiYuan Huang <cy_huang@richtek.com>
   5  */
   6
   7 #include <linux/i2c.h>
   8 #include <linux/kernel.h>
   9 #include <linux/mfd/core.h>
  10 #include <linux/module.h>
  11 #include <linux/mod_devicetable.h>
  12 #include <linux/regmap.h>
  13
  14 #define RT5120_REG_INTENABLE    0x1D
  15 #define RT5120_REG_INTSTAT      0x1E
  16 #define RT5120_REG_FZCMODE      0x44
  17
  18 #define RT5120_INT_HOTDIE       0
  19 #define RT5120_INT_PWRKEY_REL   5
  20 #define RT5120_INT_PWRKEY_PRESS 6
  21
  22 static const struct regmap_range rt5120_rd_yes_ranges[] = {
  23         regmap_reg_range(0x03, 0x13),
  24         regmap_reg_range(0x1c, 0x20),
  25         regmap_reg_range(0x44, 0x44),
  26 };
  27
  28 static const struct regmap_range rt5120_wr_yes_ranges[] = {
  29         regmap_reg_range(0x06, 0x13),
  30         regmap_reg_range(0x1c, 0x20),
  31         regmap_reg_range(0x44, 0x44),
  32 };
  33
  34 static const struct regmap_access_table rt5120_rd_table = {
  35         .yes_ranges = rt5120_rd_yes_ranges,
  36         .n_yes_ranges = ARRAY_SIZE(rt5120_rd_yes_ranges),
  37 };
  38
  39 static const struct regmap_access_table rt5120_wr_table = {
  40         .yes_ranges = rt5120_wr_yes_ranges,
  41         .n_yes_ranges = ARRAY_SIZE(rt5120_wr_yes_ranges),
  42 };
  43
  44 static const struct regmap_config rt5120_regmap_config = {
  45         .reg_bits = 8,
  46         .val_bits = 8,
  47         .max_register = RT5120_REG_FZCMODE,
  48
  49         .wr_table = &rt5120_wr_table,
  50         .rd_table = &rt5120_rd_table,
  51 };
  52
  53 static const struct regmap_irq rt5120_irqs[] = {
  54         REGMAP_IRQ_REG_LINE(RT5120_INT_HOTDIE, 8),
  55         REGMAP_IRQ_REG_LINE(RT5120_INT_PWRKEY_REL, 8),
  56         REGMAP_IRQ_REG_LINE(RT5120_INT_PWRKEY_PRESS, 8),
  57 };
  58
  59 static const struct regmap_irq_chip rt5120_irq_chip = {
  60         .name = "rt5120-pmic",
  61         .status_base = RT5120_REG_INTSTAT,
  62         .mask_base = RT5120_REG_INTENABLE,
  63         .ack_base = RT5120_REG_INTSTAT,
  64         .mask_invert = true,
  65         .use_ack = true,
  66         .num_regs = 1,
  67         .irqs = rt5120_irqs,
  68         .num_irqs = ARRAY_SIZE(rt5120_irqs),
  69 };
  70
  71 static const struct resource rt5120_regulator_resources[] = {
  72         DEFINE_RES_IRQ(RT5120_INT_HOTDIE),
  73 };
  74
  75 static const struct resource rt5120_pwrkey_resources[] = {
  76         DEFINE_RES_IRQ_NAMED(RT5120_INT_PWRKEY_PRESS, "pwrkey-press"),
  77         DEFINE_RES_IRQ_NAMED(RT5120_INT_PWRKEY_REL, "pwrkey-release"),
  78 };
  79
  80 static const struct mfd_cell rt5120_devs[] = {
  81         MFD_CELL_RES("rt5120-regulator", rt5120_regulator_resources),
  82         MFD_CELL_OF("rt5120-pwrkey", rt5120_pwrkey_resources, NULL, 0, 0, "richtek,rt5120-pwrkey"),
  83 };
  84
  85 static int rt5120_probe(struct i2c_client *i2c)
  86 {
  87         struct device *dev = &i2c->dev;
  88         struct regmap *regmap;
  89         struct regmap_irq_chip_data *irq_data;
  90         int ret;
  91
  92         regmap = devm_regmap_init_i2c(i2c, &rt5120_regmap_config);
  93         if (IS_ERR(regmap))
  94                 return dev_err_probe(dev, PTR_ERR(regmap),
  95                                      "Failed to init regmap\n");
  96
  97         ret = devm_regmap_add_irq_chip(dev, regmap, i2c->irq, IRQF_ONESHOT, 0,
  98                                        &rt5120_irq_chip, &irq_data);
  99         if (ret)
 100                 return dev_err_probe(dev, ret, "Failed to add IRQ chip\n");
 101
 102         return devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, rt5120_devs,
 103                                     ARRAY_SIZE(rt5120_devs), NULL, 0,
 104                                     regmap_irq_get_domain(irq_data));
 105 }
 106
 107 static const struct of_device_id rt5120_device_match_table[] = {
 108         { .compatible = "richtek,rt5120" },
 109         {}
 110 };
 111 MODULE_DEVICE_TABLE(of, rt5120_device_match_table);
 112
 113 static struct i2c_driver rt5120_driver = {
 114         .driver = {
 115                 .name = "rt5120",
 116                 .of_match_table = rt5120_device_match_table,
 117         },
 118         .probe_new = rt5120_probe,
 119 };
 120 module_i2c_driver(rt5120_driver);
 121
 122 MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
 123 MODULE_DESCRIPTION("Richtek RT5120 I2C driver");
 124 MODULE_LICENSE("GPL v2");