1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Interconnect framework driver for i.MX8MN SoC
4 *
5 * Copyright (c) 2019-2020, NXP
6 */
7
8 #include <linux/module.h>
9 #include <linux/platform_device.h>
10 #include <dt-bindings/interconnect/imx8mn.h>
11
12 #include "imx.h"
13
14 static const struct imx_icc_node_adj_desc imx8mn_dram_adj = {
15 .bw_mul = 1,
16 .bw_div = 4,
17 .phandle_name = "fsl,ddrc",
18 };
19
20 static const struct imx_icc_node_adj_desc imx8mn_noc_adj = {
21 .bw_mul = 1,
22 .bw_div = 4,
23 .main_noc = true,
24 };
25
26 /*
27 * Describe bus masters, slaves and connections between them
28 *
29 * This is a simplified subset of the bus diagram, there are several other
30 * PL301 nics which are skipped/merged into PL301_MAIN
31 */
32 static struct imx_icc_node_desc nodes[] = {
33 DEFINE_BUS_INTERCONNECT("NOC", IMX8MN_ICN_NOC, &imx8mn_noc_adj,
34 IMX8MN_ICS_DRAM, IMX8MN_ICN_MAIN),
35
36 DEFINE_BUS_SLAVE("DRAM", IMX8MN_ICS_DRAM, &imx8mn_dram_adj),
37 DEFINE_BUS_SLAVE("OCRAM", IMX8MN_ICS_OCRAM, NULL),
38 DEFINE_BUS_MASTER("A53", IMX8MN_ICM_A53, IMX8MN_ICN_NOC),
39
40 /* GPUMIX */
41 DEFINE_BUS_MASTER("GPU", IMX8MN_ICM_GPU, IMX8MN_ICN_GPU),
42 DEFINE_BUS_INTERCONNECT("PL301_GPU", IMX8MN_ICN_GPU, NULL, IMX8MN_ICN_NOC),
43
44 /* DISPLAYMIX */
45 DEFINE_BUS_MASTER("CSI1", IMX8MN_ICM_CSI1, IMX8MN_ICN_MIPI),
46 DEFINE_BUS_MASTER("CSI2", IMX8MN_ICM_CSI2, IMX8MN_ICN_MIPI),
47 DEFINE_BUS_MASTER("ISI", IMX8MN_ICM_ISI, IMX8MN_ICN_MIPI),
48 DEFINE_BUS_MASTER("LCDIF", IMX8MN_ICM_LCDIF, IMX8MN_ICN_MIPI),
49 DEFINE_BUS_INTERCONNECT("PL301_MIPI", IMX8MN_ICN_MIPI, NULL, IMX8MN_ICN_NOC),
50
51 /* USB goes straight to NOC */
52 DEFINE_BUS_MASTER("USB", IMX8MN_ICM_USB, IMX8MN_ICN_NOC),
53
54 /* Audio */
55 DEFINE_BUS_MASTER("SDMA2", IMX8MN_ICM_SDMA2, IMX8MN_ICN_AUDIO),
56 DEFINE_BUS_MASTER("SDMA3", IMX8MN_ICM_SDMA3, IMX8MN_ICN_AUDIO),
57 DEFINE_BUS_INTERCONNECT("PL301_AUDIO", IMX8MN_ICN_AUDIO, NULL, IMX8MN_ICN_MAIN),
58
59 /* Ethernet */
60 DEFINE_BUS_MASTER("ENET", IMX8MN_ICM_ENET, IMX8MN_ICN_ENET),
61 DEFINE_BUS_INTERCONNECT("PL301_ENET", IMX8MN_ICN_ENET, NULL, IMX8MN_ICN_MAIN),
62
63 /* Other */
64 DEFINE_BUS_MASTER("SDMA1", IMX8MN_ICM_SDMA1, IMX8MN_ICN_MAIN),
65 DEFINE_BUS_MASTER("NAND", IMX8MN_ICM_NAND, IMX8MN_ICN_MAIN),
66 DEFINE_BUS_MASTER("USDHC1", IMX8MN_ICM_USDHC1, IMX8MN_ICN_MAIN),
67 DEFINE_BUS_MASTER("USDHC2", IMX8MN_ICM_USDHC2, IMX8MN_ICN_MAIN),
68 DEFINE_BUS_MASTER("USDHC3", IMX8MN_ICM_USDHC3, IMX8MN_ICN_MAIN),
69 DEFINE_BUS_INTERCONNECT("PL301_MAIN", IMX8MN_ICN_MAIN, NULL,
70 IMX8MN_ICN_NOC, IMX8MN_ICS_OCRAM),
71 };
72
imx8mn_icc_probe(struct platform_device * pdev)73 static int imx8mn_icc_probe(struct platform_device *pdev)
74 {
75 return imx_icc_register(pdev, nodes, ARRAY_SIZE(nodes));
76 }
77
imx8mn_icc_remove(struct platform_device * pdev)78 static int imx8mn_icc_remove(struct platform_device *pdev)
79 {
80 return imx_icc_unregister(pdev);
81 }
82
83 static struct platform_driver imx8mn_icc_driver = {
84 .probe = imx8mn_icc_probe,
85 .remove = imx8mn_icc_remove,
86 .driver = {
87 .name = "imx8mn-interconnect",
88 },
89 };
90
91 module_platform_driver(imx8mn_icc_driver);
92 MODULE_ALIAS("platform:imx8mn-interconnect");
93 MODULE_AUTHOR("Leonard Crestez <leonard.crestez@nxp.com>");
94 MODULE_LICENSE("GPL v2");
95