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>

diff --git a/drivers/interconnect/imx/Kconfig b/drivers/interconnect/imx/Kconfig
index a2e6127..be29283 100644 (file)
--- a/drivers/interconnect/imx/Kconfig
+++ b/drivers/interconnect/imx/Kconfig
@@ -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

diff --git a/drivers/interconnect/imx/Makefile b/drivers/interconnect/imx/Makefile
index e7d7e02..21fd523 100644 (file)
--- a/drivers/interconnect/imx/Makefile
+++ b/drivers/interconnect/imx/Makefile
@@ -1,7 +1,9 @@
 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

diff --git a/drivers/interconnect/imx/imx8mn.c b/drivers/interconnect/imx/imx8mn.c
new file mode 100644 (file)
index 0000000..ad97e55
--- /dev/null
+++ b/drivers/interconnect/imx/imx8mn.c
@@ -0,0 +1,94 @@
+// 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");

diff --git a/include/dt-bindings/interconnect/imx8mn.h b/include/dt-bindings/interconnect/imx8mn.h
new file mode 100644 (file)
index 0000000..307b977
--- /dev/null
+++ b/include/dt-bindings/interconnect/imx8mn.h
@@ -0,0 +1,41 @@
+/* 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 */