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
rsmu_core_init(struct rsmu_ddata * rsmu)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
rsmu_core_exit(struct rsmu_ddata * rsmu)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");
89