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 73 static int imx8mn_icc_probe(struct platform_device *pdev) 74 { 75 return imx_icc_register(pdev, nodes, ARRAY_SIZE(nodes), NULL); 76 } 77 78 static int imx8mn_icc_remove(struct platform_device *pdev) 79 { 80 imx_icc_unregister(pdev); 81 82 return 0; 83 } 84 85 static struct platform_driver imx8mn_icc_driver = { 86 .probe = imx8mn_icc_probe, 87 .remove = imx8mn_icc_remove, 88 .driver = { 89 .name = "imx8mn-interconnect", 90 }, 91 }; 92 93 module_platform_driver(imx8mn_icc_driver); 94 MODULE_ALIAS("platform:imx8mn-interconnect"); 95 MODULE_AUTHOR("Leonard Crestez <leonard.crestez@nxp.com>"); 96 MODULE_LICENSE("GPL v2"); 97