summaryrefslogtreecommitdiff
path: root/drivers/interconnect
diff options
context:
space:
mode:
authorLeonard Crestez <leonard.crestez@nxp.com>2020-04-28 20:03:02 +0300
committerGeorgi Djakov <georgi.djakov@linaro.org>2020-04-28 20:03:02 +0300
commit4b54bf4763e3725dcceaac379df4ef78df3b9fcd (patch)
tree62398dd38daa8f9d65046621ed71fd9885caa9e1 /drivers/interconnect
parent63fc8029b37ef22aefa5288211ccc92c3f40def0 (diff)
downloadlwn-4b54bf4763e3725dcceaac379df4ef78df3b9fcd.tar.gz
lwn-4b54bf4763e3725dcceaac379df4ef78df3b9fcd.zip
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>
Diffstat (limited to 'drivers/interconnect')
-rw-r--r--drivers/interconnect/imx/Kconfig4
-rw-r--r--drivers/interconnect/imx/Makefile2
-rw-r--r--drivers/interconnect/imx/imx8mn.c94
3 files changed, 100 insertions, 0 deletions
diff --git a/drivers/interconnect/imx/Kconfig b/drivers/interconnect/imx/Kconfig
index a2e6127f25b7..be2928362bb7 100644
--- 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 e7d7e029d6c7..21fd5233754f 100644
--- 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
index 000000000000..ad97e55fd4e5
--- /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");