drivers/mfd/hi6421-spmi-pmic.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Device driver for regulators in HISI PMIC IC
   4  *
   5  * Copyright (c) 2013 Linaro Ltd.
   6  * Copyright (c) 2011 Hisilicon.
   7  * Copyright (c) 2020-2021 Huawei Technologies Co., Ltd.
   8  */
   9
  10 #include <linux/mfd/core.h>
  11 #include <linux/module.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/regmap.h>
  14 #include <linux/slab.h>
  15 #include <linux/spmi.h>
  16
  17 static const struct mfd_cell hi6421v600_devs[] = {
  18         { .name = "hi6421v600-irq", },
  19         { .name = "hi6421v600-regulator", },
  20 };
  21
  22 static const struct regmap_config regmap_config = {
  23         .reg_bits       = 16,
  24         .val_bits       = BITS_PER_BYTE,
  25         .max_register   = 0xffff,
  26         .fast_io        = true
  27 };
  28
  29 static int hi6421_spmi_pmic_probe(struct spmi_device *sdev)
  30 {
  31         struct device *dev = &sdev->dev;
  32         struct regmap *regmap;
  33         int ret;
  34
  35         regmap = devm_regmap_init_spmi_ext(sdev, &regmap_config);
  36         if (IS_ERR(regmap))
  37                 return PTR_ERR(regmap);
  38
  39         dev_set_drvdata(&sdev->dev, regmap);
  40
  41         ret = devm_mfd_add_devices(&sdev->dev, PLATFORM_DEVID_NONE,
  42                                    hi6421v600_devs, ARRAY_SIZE(hi6421v600_devs),
  43                                    NULL, 0, NULL);
  44         if (ret < 0)
  45                 dev_err(dev, "Failed to add child devices: %d\n", ret);
  46
  47         return ret;
  48 }
  49
  50 static const struct of_device_id pmic_spmi_id_table[] = {
  51         { .compatible = "hisilicon,hi6421-spmi" },
  52         { }
  53 };
  54 MODULE_DEVICE_TABLE(of, pmic_spmi_id_table);
  55
  56 static struct spmi_driver hi6421_spmi_pmic_driver = {
  57         .driver = {
  58                 .name   = "hi6421-spmi-pmic",
  59                 .of_match_table = pmic_spmi_id_table,
  60         },
  61         .probe  = hi6421_spmi_pmic_probe,
  62 };
  63 module_spmi_driver(hi6421_spmi_pmic_driver);
  64
  65 MODULE_DESCRIPTION("HiSilicon Hi6421v600 SPMI PMIC driver");
  66 MODULE_LICENSE("GPL v2");