LXR linux/drivers/mfd/da9052-spi.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * SPI access for Dialog DA9052 PMICs.
   4 *
   5 * Copyright(c) 2011 Dialog Semiconductor Ltd.
   6 *
   7 * Author: David Dajun Chen <dchen@diasemi.com>
   8 */
   9
  10#include <linux/device.h>
  11#include <linux/module.h>
  12#include <linux/input.h>
  13#include <linux/mfd/core.h>
  14#include <linux/spi/spi.h>
  15#include <linux/err.h>
  16
  17#include <linux/mfd/da9052/da9052.h>
  18
  19static int da9052_spi_probe(struct spi_device *spi)
  20{
  21        struct regmap_config config;
  22        int ret;
  23        const struct spi_device_id *id = spi_get_device_id(spi);
  24        struct da9052 *da9052;
  25
  26        da9052 = devm_kzalloc(&spi->dev, sizeof(struct da9052), GFP_KERNEL);
  27        if (!da9052)
  28                return -ENOMEM;
  29
  30        spi->mode = SPI_MODE_0;
  31        spi->bits_per_word = 8;
  32        spi_setup(spi);
  33
  34        da9052->dev = &spi->dev;
  35        da9052->chip_irq = spi->irq;
  36
  37        spi_set_drvdata(spi, da9052);
  38
  39        config = da9052_regmap_config;
  40        config.read_flag_mask = 1;
  41        config.reg_bits = 7;
  42        config.pad_bits = 1;
  43        config.val_bits = 8;
  44        config.use_single_read = true;
  45        config.use_single_write = true;
  46
  47        da9052->regmap = devm_regmap_init_spi(spi, &config);
  48        if (IS_ERR(da9052->regmap)) {
  49                ret = PTR_ERR(da9052->regmap);
  50                dev_err(&spi->dev, "Failed to allocate register map: %d\n",
  51                        ret);
  52                return ret;
  53        }
  54
  55        return da9052_device_init(da9052, id->driver_data);
  56}
  57
  58static int da9052_spi_remove(struct spi_device *spi)
  59{
  60        struct da9052 *da9052 = spi_get_drvdata(spi);
  61
  62        da9052_device_exit(da9052);
  63        return 0;
  64}
  65
  66static const struct spi_device_id da9052_spi_id[] = {
  67        {"da9052", DA9052},
  68        {"da9053-aa", DA9053_AA},
  69        {"da9053-ba", DA9053_BA},
  70        {"da9053-bb", DA9053_BB},
  71        {"da9053-bc", DA9053_BC},
  72        {}
  73};
  74
  75static struct spi_driver da9052_spi_driver = {
  76        .probe = da9052_spi_probe,
  77        .remove = da9052_spi_remove,
  78        .id_table = da9052_spi_id,
  79        .driver = {
  80                .name = "da9052",
  81        },
  82};
  83
  84static int __init da9052_spi_init(void)
  85{
  86        int ret;
  87
  88        ret = spi_register_driver(&da9052_spi_driver);
  89        if (ret != 0) {
  90                pr_err("Failed to register DA9052 SPI driver, %d\n", ret);
  91                return ret;
  92        }
  93
  94        return 0;
  95}
  96subsys_initcall(da9052_spi_init);
  97
  98static void __exit da9052_spi_exit(void)
  99{
 100        spi_unregister_driver(&da9052_spi_driver);
 101}
 102module_exit(da9052_spi_exit);
 103
 104MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
 105MODULE_DESCRIPTION("SPI driver for Dialog DA9052 PMIC");
 106MODULE_LICENSE("GPL");
 107