LXR linux/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
  14static 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
  20static 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 */
  32static 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
  73static int imx8mn_icc_probe(struct platform_device *pdev)
  74{
  75        return imx_icc_register(pdev, nodes, ARRAY_SIZE(nodes));
  76}
  77
  78static int imx8mn_icc_remove(struct platform_device *pdev)
  79{
  80        return imx_icc_unregister(pdev);
  81}
  82
  83static 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
  91module_platform_driver(imx8mn_icc_driver);
  92MODULE_ALIAS("platform:imx8mn-interconnect");
  93MODULE_AUTHOR("Leonard Crestez <leonard.crestez@nxp.com>");
  94MODULE_LICENSE("GPL v2");
  95