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/mfd/hi6421-spmi-pmic.h>
  12 #include <linux/module.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/regmap.h>
  15 #include <linux/slab.h>
  16 #include <linux/spmi.h>
  17
  18 static const struct mfd_cell hi6421v600_devs[] = {
  19         { .name = "hi6421v600-irq", },
  20         { .name = "hi6421v600-regulator", },
  21 };
  22
  23 static const struct regmap_config regmap_config = {
  24         .reg_bits       = 16,
  25         .val_bits       = BITS_PER_BYTE,
  26         .max_register   = 0xffff,
  27         .fast_io        = true
  28 };
  29
  30 static int hi6421_spmi_pmic_probe(struct spmi_device *sdev)
  31 {
  32         struct device *dev = &sdev->dev;
  33         int ret;
  34         struct hi6421_spmi_pmic *ddata;
  35         ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL);
  36         if (!ddata)
  37                 return -ENOMEM;
  38
  39         ddata->regmap = devm_regmap_init_spmi_ext(sdev, &regmap_config);
  40         if (IS_ERR(ddata->regmap))
  41                 return PTR_ERR(ddata->regmap);
  42
  43         ddata->dev = dev;
  44
  45         dev_set_drvdata(&sdev->dev, ddata);
  46
  47         ret = devm_mfd_add_devices(&sdev->dev, PLATFORM_DEVID_NONE,
  48                                    hi6421v600_devs, ARRAY_SIZE(hi6421v600_devs),
  49                                    NULL, 0, NULL);
  50         if (ret < 0)
  51                 dev_err(dev, "Failed to add child devices: %d\n", ret);
  52
  53         return ret;
  54 }
  55
  56 static const struct of_device_id pmic_spmi_id_table[] = {
  57         { .compatible = "hisilicon,hi6421-spmi" },
  58         { }
  59 };
  60 MODULE_DEVICE_TABLE(of, pmic_spmi_id_table);
  61
  62 static struct spmi_driver hi6421_spmi_pmic_driver = {
  63         .driver = {
  64                 .name   = "hi6421-spmi-pmic",
  65                 .of_match_table = pmic_spmi_id_table,
  66         },
  67         .probe  = hi6421_spmi_pmic_probe,
  68 };
  69 module_spmi_driver(hi6421_spmi_pmic_driver);
  70
  71 MODULE_DESCRIPTION("HiSilicon Hi6421v600 SPMI PMIC driver");
  72 MODULE_LICENSE("GPL v2");