tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
interconnect: imx: Add platform driver for imx8mn
Add a platform driver for the i.MX8MN SoC describing bus topology, based
on internal documentation.
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Link: https://lore.kernel.org/r/338a5409ce88811ba6c940ba06441db3faa8c187.1586174566.git.leonard.crestez@nxp.com
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
authored by
Leonard Crestez
and committed by
Georgi Djakov
4b54bf47
63fc8029
+141
+4
drivers/interconnect/imx/Kconfig
+4
drivers/interconnect/imx/Kconfig
···
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tristate "i.MX8MM interconnect driver"
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depends on INTERCONNECT_IMX
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config INTERCONNECT_IMX8MN
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tristate "i.MX8MN interconnect driver"
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depends on INTERCONNECT_IMX
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config INTERCONNECT_IMX8MQ
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tristate "i.MX8MQ interconnect driver"
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depends on INTERCONNECT_IMX
+2
drivers/interconnect/imx/Makefile
+2
drivers/interconnect/imx/Makefile
···
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imx-interconnect-objs := imx.o
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imx8mm-interconnect-objs := imx8mm.o
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imx8mq-interconnect-objs := imx8mq.o
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imx8mn-interconnect-objs := imx8mn.o
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obj-$(CONFIG_INTERCONNECT_IMX) += imx-interconnect.o
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obj-$(CONFIG_INTERCONNECT_IMX8MM) += imx8mm-interconnect.o
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obj-$(CONFIG_INTERCONNECT_IMX8MQ) += imx8mq-interconnect.o
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obj-$(CONFIG_INTERCONNECT_IMX8MN) += imx8mn-interconnect.o
+94
drivers/interconnect/imx/imx8mn.c
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drivers/interconnect/imx/imx8mn.c
···
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Interconnect framework driver for i.MX8MN SoC
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*
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* Copyright (c) 2019-2020, NXP
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <dt-bindings/interconnect/imx8mn.h>
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#include "imx.h"
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static const struct imx_icc_node_adj_desc imx8mn_dram_adj = {
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.bw_mul = 1,
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.bw_div = 4,
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.phandle_name = "fsl,ddrc",
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};
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static const struct imx_icc_node_adj_desc imx8mn_noc_adj = {
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.bw_mul = 1,
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.bw_div = 4,
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.main_noc = true,
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};
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+
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/*
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* Describe bus masters, slaves and connections between them
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*
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* This is a simplified subset of the bus diagram, there are several other
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* PL301 nics which are skipped/merged into PL301_MAIN
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*/
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static struct imx_icc_node_desc nodes[] = {
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DEFINE_BUS_INTERCONNECT("NOC", IMX8MN_ICN_NOC, &imx8mn_noc_adj,
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IMX8MN_ICS_DRAM, IMX8MN_ICN_MAIN),
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DEFINE_BUS_SLAVE("DRAM", IMX8MN_ICS_DRAM, &imx8mn_dram_adj),
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DEFINE_BUS_SLAVE("OCRAM", IMX8MN_ICS_OCRAM, NULL),
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DEFINE_BUS_MASTER("A53", IMX8MN_ICM_A53, IMX8MN_ICN_NOC),
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/* GPUMIX */
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DEFINE_BUS_MASTER("GPU", IMX8MN_ICM_GPU, IMX8MN_ICN_GPU),
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DEFINE_BUS_INTERCONNECT("PL301_GPU", IMX8MN_ICN_GPU, NULL, IMX8MN_ICN_NOC),
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/* DISPLAYMIX */
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DEFINE_BUS_MASTER("CSI1", IMX8MN_ICM_CSI1, IMX8MN_ICN_MIPI),
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DEFINE_BUS_MASTER("CSI2", IMX8MN_ICM_CSI2, IMX8MN_ICN_MIPI),
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DEFINE_BUS_MASTER("ISI", IMX8MN_ICM_ISI, IMX8MN_ICN_MIPI),
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DEFINE_BUS_MASTER("LCDIF", IMX8MN_ICM_LCDIF, IMX8MN_ICN_MIPI),
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DEFINE_BUS_INTERCONNECT("PL301_MIPI", IMX8MN_ICN_MIPI, NULL, IMX8MN_ICN_NOC),
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/* USB goes straight to NOC */
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DEFINE_BUS_MASTER("USB", IMX8MN_ICM_USB, IMX8MN_ICN_NOC),
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/* Audio */
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DEFINE_BUS_MASTER("SDMA2", IMX8MN_ICM_SDMA2, IMX8MN_ICN_AUDIO),
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DEFINE_BUS_MASTER("SDMA3", IMX8MN_ICM_SDMA3, IMX8MN_ICN_AUDIO),
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DEFINE_BUS_INTERCONNECT("PL301_AUDIO", IMX8MN_ICN_AUDIO, NULL, IMX8MN_ICN_MAIN),
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/* Ethernet */
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DEFINE_BUS_MASTER("ENET", IMX8MN_ICM_ENET, IMX8MN_ICN_ENET),
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DEFINE_BUS_INTERCONNECT("PL301_ENET", IMX8MN_ICN_ENET, NULL, IMX8MN_ICN_MAIN),
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/* Other */
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DEFINE_BUS_MASTER("SDMA1", IMX8MN_ICM_SDMA1, IMX8MN_ICN_MAIN),
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DEFINE_BUS_MASTER("NAND", IMX8MN_ICM_NAND, IMX8MN_ICN_MAIN),
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DEFINE_BUS_MASTER("USDHC1", IMX8MN_ICM_USDHC1, IMX8MN_ICN_MAIN),
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DEFINE_BUS_MASTER("USDHC2", IMX8MN_ICM_USDHC2, IMX8MN_ICN_MAIN),
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DEFINE_BUS_MASTER("USDHC3", IMX8MN_ICM_USDHC3, IMX8MN_ICN_MAIN),
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DEFINE_BUS_INTERCONNECT("PL301_MAIN", IMX8MN_ICN_MAIN, NULL,
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IMX8MN_ICN_NOC, IMX8MN_ICS_OCRAM),
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};
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static int imx8mn_icc_probe(struct platform_device *pdev)
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{
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return imx_icc_register(pdev, nodes, ARRAY_SIZE(nodes));
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}
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static int imx8mn_icc_remove(struct platform_device *pdev)
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{
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return imx_icc_unregister(pdev);
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}
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static struct platform_driver imx8mn_icc_driver = {
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.probe = imx8mn_icc_probe,
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.remove = imx8mn_icc_remove,
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.driver = {
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.name = "imx8mn-interconnect",
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},
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};
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module_platform_driver(imx8mn_icc_driver);
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MODULE_ALIAS("platform:imx8mn-interconnect");
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MODULE_AUTHOR("Leonard Crestez <leonard.crestez@nxp.com>");
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MODULE_LICENSE("GPL v2");
+41
include/dt-bindings/interconnect/imx8mn.h
+41
include/dt-bindings/interconnect/imx8mn.h
···
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Interconnect framework driver for i.MX SoC
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*
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* Copyright (c) 2019-2020, NXP
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*/
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#ifndef __DT_BINDINGS_INTERCONNECT_IMX8MN_H
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#define __DT_BINDINGS_INTERCONNECT_IMX8MN_H
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#define IMX8MN_ICN_NOC 1
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#define IMX8MN_ICS_DRAM 2
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#define IMX8MN_ICS_OCRAM 3
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#define IMX8MN_ICM_A53 4
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#define IMX8MN_ICM_GPU 5
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#define IMX8MN_ICN_GPU 6
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#define IMX8MN_ICM_CSI1 7
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#define IMX8MN_ICM_CSI2 8
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#define IMX8MN_ICM_ISI 9
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#define IMX8MN_ICM_LCDIF 10
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#define IMX8MN_ICN_MIPI 11
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#define IMX8MN_ICM_USB 12
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#define IMX8MN_ICM_SDMA2 13
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#define IMX8MN_ICM_SDMA3 14
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#define IMX8MN_ICN_AUDIO 15
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#define IMX8MN_ICN_ENET 16
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#define IMX8MN_ICM_ENET 17
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#define IMX8MN_ICM_NAND 18
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#define IMX8MN_ICM_SDMA1 19
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#define IMX8MN_ICM_USDHC1 20
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#define IMX8MN_ICM_USDHC2 21
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#define IMX8MN_ICM_USDHC3 22
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#define IMX8MN_ICN_MAIN 23
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#endif /* __DT_BINDINGS_INTERCONNECT_IMX8MN_H */