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
19enum {
20	RSMU_PHC = 0,
21	RSMU_CDEV = 1,
22	RSMU_N_DEVS = 2,
23};
24
25static struct mfd_cell rsmu_cm_devs[] = {
26	[RSMU_PHC] = {
27		.name = "8a3400x-phc",
28	},
29	[RSMU_CDEV] = {
30		.name = "8a3400x-cdev",
31	},
32};
33
34static struct mfd_cell rsmu_sabre_devs[] = {
35	[RSMU_PHC] = {
36		.name = "82p33x1x-phc",
37	},
38	[RSMU_CDEV] = {
39		.name = "82p33x1x-cdev",
40	},
41};
42
43static struct mfd_cell rsmu_sl_devs[] = {
44	[RSMU_PHC] = {
45		.name = "8v19n85x-phc",
46	},
47	[RSMU_CDEV] = {
48		.name = "8v19n85x-cdev",
49	},
50};
51
52int 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
82void rsmu_core_exit(struct rsmu_ddata *rsmu)
83{
84	mutex_destroy(&rsmu->lock);
85}
86
87MODULE_DESCRIPTION("Renesas SMU core driver");
88MODULE_LICENSE("GPL");
89