drivers/interconnect/imx/imx8mn.c

   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));
  76 }
  77
  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");