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