Commit 4b54bf47 authored by Leonard Crestez's avatar Leonard Crestez Committed by Georgi Djakov
Browse files

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: default avatarLeonard Crestez <leonard.crestez@nxp.com>
Link: https://lore.kernel.org/r/338a5409ce88811ba6c940ba06441db3faa8c187.1586174566.git.leonard.crestez@nxp.com


Signed-off-by: default avatarGeorgi Djakov <georgi.djakov@linaro.org>
parent 63fc8029

drivers/interconnect/imx/Kconfig

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@@ -8,6 +8,10 @@ config INTERCONNECT_IMX8MM 
	tristate "i.MX8MM interconnect driver"

	depends on INTERCONNECT_IMX



config INTERCONNECT_IMX8MN

	tristate "i.MX8MN interconnect driver"

	depends on INTERCONNECT_IMX



config INTERCONNECT_IMX8MQ

	tristate "i.MX8MQ interconnect driver"

	depends on INTERCONNECT_IMX

drivers/interconnect/imx/Makefile

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imx-interconnect-objs			:= imx.o

imx8mm-interconnect-objs       		:= imx8mm.o

imx8mq-interconnect-objs       		:= imx8mq.o

imx8mn-interconnect-objs       		:= imx8mn.o



obj-$(CONFIG_INTERCONNECT_IMX)		+= imx-interconnect.o

obj-$(CONFIG_INTERCONNECT_IMX8MM)	+= imx8mm-interconnect.o

obj-$(CONFIG_INTERCONNECT_IMX8MQ)	+= imx8mq-interconnect.o

obj-$(CONFIG_INTERCONNECT_IMX8MN)	+= imx8mn-interconnect.o

drivers/interconnect/imx/imx8mn.c

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// SPDX-License-Identifier: GPL-2.0

/*

 * Interconnect framework driver for i.MX8MN SoC

 *

 * Copyright (c) 2019-2020, NXP

 */



#include <linux/module.h>

#include <linux/platform_device.h>

#include <dt-bindings/interconnect/imx8mn.h>



#include "imx.h"



static const struct imx_icc_node_adj_desc imx8mn_dram_adj = {

	.bw_mul = 1,

	.bw_div = 4,

	.phandle_name = "fsl,ddrc",

};



static const struct imx_icc_node_adj_desc imx8mn_noc_adj = {

	.bw_mul = 1,

	.bw_div = 4,

	.main_noc = true,

};



/*

 * Describe bus masters, slaves and connections between them

 *

 * This is a simplified subset of the bus diagram, there are several other

 * PL301 nics which are skipped/merged into PL301_MAIN

 */

static struct imx_icc_node_desc nodes[] = {

	DEFINE_BUS_INTERCONNECT("NOC", IMX8MN_ICN_NOC, &imx8mn_noc_adj,

			IMX8MN_ICS_DRAM, IMX8MN_ICN_MAIN),



	DEFINE_BUS_SLAVE("DRAM", IMX8MN_ICS_DRAM, &imx8mn_dram_adj),

	DEFINE_BUS_SLAVE("OCRAM", IMX8MN_ICS_OCRAM, NULL),

	DEFINE_BUS_MASTER("A53", IMX8MN_ICM_A53, IMX8MN_ICN_NOC),



	/* GPUMIX */

	DEFINE_BUS_MASTER("GPU", IMX8MN_ICM_GPU, IMX8MN_ICN_GPU),

	DEFINE_BUS_INTERCONNECT("PL301_GPU", IMX8MN_ICN_GPU, NULL, IMX8MN_ICN_NOC),



	/* DISPLAYMIX */

	DEFINE_BUS_MASTER("CSI1", IMX8MN_ICM_CSI1, IMX8MN_ICN_MIPI),

	DEFINE_BUS_MASTER("CSI2", IMX8MN_ICM_CSI2, IMX8MN_ICN_MIPI),

	DEFINE_BUS_MASTER("ISI", IMX8MN_ICM_ISI, IMX8MN_ICN_MIPI),

	DEFINE_BUS_MASTER("LCDIF", IMX8MN_ICM_LCDIF, IMX8MN_ICN_MIPI),

	DEFINE_BUS_INTERCONNECT("PL301_MIPI", IMX8MN_ICN_MIPI, NULL, IMX8MN_ICN_NOC),



	/* USB goes straight to NOC */

	DEFINE_BUS_MASTER("USB", IMX8MN_ICM_USB, IMX8MN_ICN_NOC),



	/* Audio */

	DEFINE_BUS_MASTER("SDMA2", IMX8MN_ICM_SDMA2, IMX8MN_ICN_AUDIO),

	DEFINE_BUS_MASTER("SDMA3", IMX8MN_ICM_SDMA3, IMX8MN_ICN_AUDIO),

	DEFINE_BUS_INTERCONNECT("PL301_AUDIO", IMX8MN_ICN_AUDIO, NULL, IMX8MN_ICN_MAIN),



	/* Ethernet */

	DEFINE_BUS_MASTER("ENET", IMX8MN_ICM_ENET, IMX8MN_ICN_ENET),

	DEFINE_BUS_INTERCONNECT("PL301_ENET", IMX8MN_ICN_ENET, NULL, IMX8MN_ICN_MAIN),



	/* Other */

	DEFINE_BUS_MASTER("SDMA1", IMX8MN_ICM_SDMA1, IMX8MN_ICN_MAIN),

	DEFINE_BUS_MASTER("NAND", IMX8MN_ICM_NAND, IMX8MN_ICN_MAIN),

	DEFINE_BUS_MASTER("USDHC1", IMX8MN_ICM_USDHC1, IMX8MN_ICN_MAIN),

	DEFINE_BUS_MASTER("USDHC2", IMX8MN_ICM_USDHC2, IMX8MN_ICN_MAIN),

	DEFINE_BUS_MASTER("USDHC3", IMX8MN_ICM_USDHC3, IMX8MN_ICN_MAIN),

	DEFINE_BUS_INTERCONNECT("PL301_MAIN", IMX8MN_ICN_MAIN, NULL,

			IMX8MN_ICN_NOC, IMX8MN_ICS_OCRAM),

};



static int imx8mn_icc_probe(struct platform_device *pdev)

{

	return imx_icc_register(pdev, nodes, ARRAY_SIZE(nodes));

}



static int imx8mn_icc_remove(struct platform_device *pdev)

{

	return imx_icc_unregister(pdev);

}



static struct platform_driver imx8mn_icc_driver = {

	.probe = imx8mn_icc_probe,

	.remove = imx8mn_icc_remove,

	.driver = {

		.name = "imx8mn-interconnect",

	},

};



module_platform_driver(imx8mn_icc_driver);

MODULE_ALIAS("platform:imx8mn-interconnect");

MODULE_AUTHOR("Leonard Crestez <leonard.crestez@nxp.com>");

MODULE_LICENSE("GPL v2");

include/dt-bindings/interconnect/imx8mn.h

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/* SPDX-License-Identifier: GPL-2.0 */

/*

 * Interconnect framework driver for i.MX SoC

 *

 * Copyright (c) 2019-2020, NXP

 */



#ifndef __DT_BINDINGS_INTERCONNECT_IMX8MN_H

#define __DT_BINDINGS_INTERCONNECT_IMX8MN_H



#define IMX8MN_ICN_NOC		1

#define IMX8MN_ICS_DRAM		2

#define IMX8MN_ICS_OCRAM	3

#define IMX8MN_ICM_A53		4



#define IMX8MN_ICM_GPU		5

#define IMX8MN_ICN_GPU		6



#define IMX8MN_ICM_CSI1		7

#define IMX8MN_ICM_CSI2		8

#define IMX8MN_ICM_ISI		9

#define IMX8MN_ICM_LCDIF	10

#define IMX8MN_ICN_MIPI		11



#define IMX8MN_ICM_USB		12



#define IMX8MN_ICM_SDMA2	13

#define IMX8MN_ICM_SDMA3	14

#define IMX8MN_ICN_AUDIO	15



#define IMX8MN_ICN_ENET		16

#define IMX8MN_ICM_ENET		17



#define IMX8MN_ICM_NAND		18

#define IMX8MN_ICM_SDMA1	19

#define IMX8MN_ICM_USDHC1	20

#define IMX8MN_ICM_USDHC2	21

#define IMX8MN_ICM_USDHC3	22

#define IMX8MN_ICN_MAIN		23



#endif /* __DT_BINDINGS_INTERCONNECT_IMX8MN_H */