drivers/mfd/rsmu_core.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Core driver for Renesas Synchronization Management Unit (SMU) devices.
   4  *
   5  * Copyright (C) 2021 Integrated Device Technology, Inc., a Renesas Company.
   6  */
   7
   8 #include <linux/init.h>
   9 #include <linux/kernel.h>
  10 #include <linux/mfd/core.h>
  11 #include <linux/mfd/rsmu.h>
  12 #include <linux/module.h>
  13 #include <linux/of.h>
  14 #include <linux/regmap.h>
  15 #include <linux/slab.h>
  16
  17 #include "rsmu.h"
  18
  19 enum {
  20         RSMU_PHC = 0,
  21         RSMU_CDEV = 1,
  22         RSMU_N_DEVS = 2,
  23 };
  24
  25 static struct mfd_cell rsmu_cm_devs[] = {
  26         [RSMU_PHC] = {
  27                 .name = "8a3400x-phc",
  28         },
  29         [RSMU_CDEV] = {
  30                 .name = "8a3400x-cdev",
  31         },
  32 };
  33
  34 static struct mfd_cell rsmu_sabre_devs[] = {
  35         [RSMU_PHC] = {
  36                 .name = "82p33x1x-phc",
  37         },
  38         [RSMU_CDEV] = {
  39                 .name = "82p33x1x-cdev",
  40         },
  41 };
  42
  43 static struct mfd_cell rsmu_sl_devs[] = {
  44         [RSMU_PHC] = {
  45                 .name = "8v19n85x-phc",
  46         },
  47         [RSMU_CDEV] = {
  48                 .name = "8v19n85x-cdev",
  49         },
  50 };
  51
  52 int rsmu_core_init(struct rsmu_ddata *rsmu)
  53 {
  54         struct mfd_cell *cells;
  55         int ret;
  56
  57         switch (rsmu->type) {
  58         case RSMU_CM:
  59                 cells = rsmu_cm_devs;
  60                 break;
  61         case RSMU_SABRE:
  62                 cells = rsmu_sabre_devs;
  63                 break;
  64         case RSMU_SL:
  65                 cells = rsmu_sl_devs;
  66                 break;
  67         default:
  68                 dev_err(rsmu->dev, "Unsupported RSMU device type: %d\n", rsmu->type);
  69                 return -ENODEV;
  70         }
  71
  72         mutex_init(&rsmu->lock);
  73
  74         ret = devm_mfd_add_devices(rsmu->dev, PLATFORM_DEVID_AUTO, cells,
  75                                    RSMU_N_DEVS, NULL, 0, NULL);
  76         if (ret < 0)
  77                 dev_err(rsmu->dev, "Failed to register sub-devices: %d\n", ret);
  78
  79         return ret;
  80 }
  81
  82 void rsmu_core_exit(struct rsmu_ddata *rsmu)
  83 {
  84         mutex_destroy(&rsmu->lock);
  85 }
  86
  87 MODULE_DESCRIPTION("Renesas SMU core driver");
  88 MODULE_LICENSE("GPL");