memory: tegra: Add Tegra238 memory controller support

Document the device tree binding for the Tegra238 memory controller. Tegra238 has 8 memory controller channels plus broadcast and stream-id registers.

Add the stream ID header (nvidia,tegra238-mc.h) defining ISO and NISO stream IDs for SMMU configuration.

Signed-off-by Ashish Mhetre <[email protected]>

---
  .../nvidia,tegra186-mc.yaml                   | 31 ++++++++
  .../dt-bindings/memory/nvidia,tegra238-mc.h   | 74 +++++++++++++++++++
  2 files changed, 105 insertions(+)

create mode 100644 include/dt-bindings/memory/nvidia,tegra238-mc.h

Documentation/devicetree/bindings/memory-controllers/nvidia,tegra186-mc.yaml +31 -0

index 7b03b589168b..6c374e2b1543 100644
@@ -32,6 +32,7 @@ properties:
            - nvidia,tegra186-mc
            - nvidia,tegra194-mc
            - nvidia,tegra234-mc
+          - nvidia,tegra238-mc
            - nvidia,tegra264-mc
 
    reg:

@@ -266,6 +267,36 @@ allOf:
 
          interrupt-names: false
 
+  - if:
+      properties:
+        compatible:
+          const: nvidia,tegra238-mc
+    then:
+      properties:
+        reg:
+          minItems: 10
+          maxItems: 10
+          description: 9 memory controller channels and 1 for stream-id registers
+
+        reg-names:
+          items:
+            - const: sid
+            - const: broadcast
+            - const: ch0
+            - const: ch1
+            - const: ch2
+            - const: ch3
+            - const: ch4
+            - const: ch5
+            - const: ch6
+            - const: ch7
+
+        interrupts:
+          items:
+            - description: MC general interrupt
+
+        interrupt-names: false
+
    - if:
        properties:
          compatible:

include/dt-bindings/memory/nvidia,tegra238-mc.h new file +64 -0

new file mode 100644
index 000000000000..be24c0eb3f15
@@ -0,0 +1,74 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
+/* Copyright (c) 2026, NVIDIA CORPORATION. All rights reserved. */
+
+#ifndef DT_BINDINGS_MEMORY_TEGRA238_MC_H
+#define DT_BINDINGS_MEMORY_TEGRA238_MC_H
+
+/* special clients */
+#define TEGRA238_SID_INVALID		0x0
+#define TEGRA238_SID_PASSTHROUGH	0x7f
+
+/* ISO stream IDs */
+#define TEGRA238_SID_ISO_NVDISPLAY	0x1
+#define TEGRA238_SID_ISO_APE0		0x2
+#define TEGRA238_SID_ISO_APE1		0x3
+
+/* NISO stream IDs */
+#define TEGRA238_SID_AON		0x1
+#define TEGRA238_SID_BPMP		0x2
+#define TEGRA238_SID_ETR		0x3
+#define TEGRA238_SID_FDE		0x4
+#define TEGRA238_SID_HC		0x5
+#define TEGRA238_SID_HDA		0x6
+#define TEGRA238_SID_NVDEC		0x7
+#define TEGRA238_SID_NVDISPLAY		0x8
+#define TEGRA238_SID_NVENC		0x9
+#define TEGRA238_SID_OFA		0xa
+#define TEGRA238_SID_PCIE0		0xb
+#define TEGRA238_SID_PCIE1		0xc
+#define TEGRA238_SID_PCIE2		0xd
+#define TEGRA238_SID_PCIE3		0xe
+#define TEGRA238_SID_HWMP_PMA		0xf
+#define TEGRA238_SID_PSC		0x10
+#define TEGRA238_SID_SDMMC1A		0x11
+#define TEGRA238_SID_SDMMC4A		0x12
+#define TEGRA238_SID_SES_SE0		0x13
+#define TEGRA238_SID_SES_SE1		0x14
+#define TEGRA238_SID_SES_SE2		0x15
+#define TEGRA238_SID_SEU1_SE0		0x16
+#define TEGRA238_SID_SEU1_SE1		0x17
+#define TEGRA238_SID_SEU1_SE2		0x18
+#define TEGRA238_SID_TSEC		0x19
+#define TEGRA238_SID_UFSHC		0x1a
+#define TEGRA238_SID_VIC		0x1b
+#define TEGRA238_SID_XUSB_HOST		0x1c
+#define TEGRA238_SID_XUSB_DEV		0x1d
+#define TEGRA238_SID_GPCDMA_0		0x1e
+#define TEGRA238_SID_SMMU_TEST		0x1f
+
+/* Host1x virtualization clients. */
+#define TEGRA238_SID_HOST1X_CTX0	0x20
+#define TEGRA238_SID_HOST1X_CTX1	0x21
+#define TEGRA238_SID_HOST1X_CTX2	0x22
+#define TEGRA238_SID_HOST1X_CTX3	0x23
+#define TEGRA238_SID_HOST1X_CTX4	0x24
+#define TEGRA238_SID_HOST1X_CTX5	0x25
+#define TEGRA238_SID_HOST1X_CTX6	0x26
+#define TEGRA238_SID_HOST1X_CTX7	0x27
+
+#define TEGRA238_SID_XUSB_VF0		0x28
+#define TEGRA238_SID_XUSB_VF1		0x29
+#define TEGRA238_SID_XUSB_VF2		0x2a
+#define TEGRA238_SID_XUSB_VF3		0x2b
+
+/* Host1x command buffers */

Add Memory Controller driver support for Tegra238 SOC, including:
- MC client definitions with Tegra238-specific stream IDs
- Reuse of Tegra234 ICC operations for bandwidth management via BPMP-FW
- Device tree compatible string "nvidia,tegra238-mc"

Export tegra234_mc_icc_ops so it can be shared with the Tegra238 MC driver, as both SoCs use the same ICC aggregation and bandwidth management logic.

Signed-off-by Ashish Mhetre <[email protected]>

---
  drivers/memory/tegra/Makefile   |   1 +
  drivers/memory/tegra/mc.c       |   3 +
  drivers/memory/tegra/mc.h       |   9 +
  drivers/memory/tegra/tegra234.c |   2 +-
  drivers/memory/tegra/tegra238.c | 391 ++++++++++++++++++++++++++++++++
  5 files changed, 405 insertions(+), 1 deletion(-)

create mode 100644 drivers/memory/tegra/tegra238.c

drivers/memory/tegra/Makefile +1 -0

index 6334601e6120..7c2fca12076b 100644
@@ -10,6 +10,7 @@ tegra-mc-$(CONFIG_ARCH_TEGRA_210_SOC) += tegra210.o
  tegra-mc-$(CONFIG_ARCH_TEGRA_186_SOC) += tegra186.o
  tegra-mc-$(CONFIG_ARCH_TEGRA_194_SOC) += tegra186.o tegra194.o
  tegra-mc-$(CONFIG_ARCH_TEGRA_234_SOC) += tegra186.o tegra234.o
+tegra-mc-$(CONFIG_ARCH_TEGRA_238_SOC) += tegra186.o tegra234.o tegra238.o
  tegra-mc-$(CONFIG_ARCH_TEGRA_264_SOC) += tegra186.o tegra264.o
 
  obj-$(CONFIG_TEGRA_MC) += tegra-mc.o

drivers/memory/tegra/mc.c +3 -0

index d620660da331..10ef3c323e22 100644
@@ -49,6 +49,9 @@ static const struct of_device_id tegra_mc_of_match[] = {
  #ifdef CONFIG_ARCH_TEGRA_234_SOC
  	{ .compatible = "nvidia,tegra234-mc", .data = &tegra234_mc_soc },
  #endif
+#ifdef CONFIG_ARCH_TEGRA_238_SOC
+	{ .compatible = "nvidia,tegra238-mc", .data = &tegra238_mc_soc },
+#endif
  #ifdef CONFIG_ARCH_TEGRA_264_SOC
  	{ .compatible = "nvidia,tegra264-mc", .data = &tegra264_mc_soc },
  #endif

drivers/memory/tegra/mc.h +9 -0

index 649b54369263..e94d265d7b67 100644
@@ -240,6 +240,14 @@ extern const struct tegra_mc_soc tegra194_mc_soc;
  extern const struct tegra_mc_soc tegra234_mc_soc;
  #endif
 
+#if defined(CONFIG_ARCH_TEGRA_234_SOC) || defined(CONFIG_ARCH_TEGRA_238_SOC)
+extern const struct tegra_mc_icc_ops tegra234_mc_icc_ops;
+#endif
+
+#ifdef CONFIG_ARCH_TEGRA_238_SOC
+extern const struct tegra_mc_soc tegra238_mc_soc;
+#endif
+
  #ifdef CONFIG_ARCH_TEGRA_264_SOC
  extern const struct tegra_mc_soc tegra264_mc_soc;
  #endif

@@ -256,6 +264,7 @@ extern const struct tegra_mc_ops tegra30_mc_ops;
  #if defined(CONFIG_ARCH_TEGRA_186_SOC) || \
      defined(CONFIG_ARCH_TEGRA_194_SOC) || \
      defined(CONFIG_ARCH_TEGRA_234_SOC) || \
+    defined(CONFIG_ARCH_TEGRA_238_SOC) || \
      defined(CONFIG_ARCH_TEGRA_264_SOC)
  extern const struct tegra_mc_ops tegra186_mc_ops;
  #endif

drivers/memory/tegra/tegra234.c +1 -1

index 87b22038a5fb..9fbd34d4abe0 100644
@@ -1125,7 +1125,7 @@ static int tegra234_mc_icc_get_init_bw(struct icc_node *node, u32 *avg, u32 *pea
  	return 0;
  }
 
-static const struct tegra_mc_icc_ops tegra234_mc_icc_ops = {
+const struct tegra_mc_icc_ops tegra234_mc_icc_ops = {
  	.xlate = tegra_mc_icc_xlate,
  	.aggregate = tegra234_mc_icc_aggregate,
  	.get_bw = tegra234_mc_icc_get_init_bw,

drivers/memory/tegra/tegra238.c new file +381 -0

new file mode 100644
index 000000000000..938c8985600e
@@ -0,0 +1,391 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2026, NVIDIA CORPORATION.  All rights reserved.
+ */
+
+#include <soc/tegra/mc.h>
+
+#include <dt-bindings/memory/tegra234-mc.h>
+#include <dt-bindings/memory/nvidia,tegra238-mc.h>
+#include <linux/interconnect.h>
+#include <linux/tegra-icc.h>
+
+#include <soc/tegra/bpmp.h>
+#include "mc.h"
+
+static const struct tegra_mc_client tegra238_mc_clients[] = {
+	{
+		.id = TEGRA234_MEMORY_CLIENT_HDAR,
+		.name = "hdar",
+		.bpmp_id = TEGRA_ICC_BPMP_HDA,
+		.type = TEGRA_ICC_ISO_AUDIO,
+		.sid = TEGRA238_SID_HDA,
+		.regs = {
+			.sid = {
+				.override = 0xa8,
+				.security = 0xac,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_HDAW,
+		.name = "hdaw",
+		.bpmp_id = TEGRA_ICC_BPMP_HDA,
+		.type = TEGRA_ICC_ISO_AUDIO,
+		.sid = TEGRA238_SID_HDA,
+		.regs = {
+			.sid = {
+				.override = 0x1a8,
+				.security = 0x1ac,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_SDMMCRAB,
+		.name = "sdmmcrab",
+		.bpmp_id = TEGRA_ICC_BPMP_SDMMC_4,
+		.type = TEGRA_ICC_NISO,
+		.sid = TEGRA238_SID_SDMMC4A,
+		.regs = {
+			.sid = {
+				.override = 0x318,
+				.security = 0x31c,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_SDMMCWAB,
+		.name = "sdmmcwab",
+		.bpmp_id = TEGRA_ICC_BPMP_SDMMC_4,
+		.type = TEGRA_ICC_NISO,
+		.sid = TEGRA238_SID_SDMMC4A,
+		.regs = {
+			.sid = {
+				.override = 0x338,
+				.security = 0x33c,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_APER,
+		.name = "aper",
+		.bpmp_id = TEGRA_ICC_BPMP_APE,
+		.type = TEGRA_ICC_ISO_AUDIO,
+		.sid = TEGRA238_SID_ISO_APE0,
+		.regs = {
+			.sid = {
+				.override = 0x3d0,
+				.security = 0x3d4,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_APEW,
+		.name = "apew",
+		.bpmp_id = TEGRA_ICC_BPMP_APE,
+		.type = TEGRA_ICC_ISO_AUDIO,
+		.sid = TEGRA238_SID_ISO_APE0,
+		.regs = {
+			.sid = {
+				.override = 0x3d8,
+				.security = 0x3dc,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_NVDISPLAYR,
+		.name = "nvdisplayr",
+		.bpmp_id = TEGRA_ICC_BPMP_DISPLAY,
+		.type = TEGRA_ICC_ISO_DISPLAY,
+		.sid = TEGRA238_SID_ISO_NVDISPLAY,
+		.regs = {
+			.sid = {
+				.override = 0x490,
+				.security = 0x494,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_NVDISPLAYR1,
+		.name = "nvdisplayr1",
+		.bpmp_id = TEGRA_ICC_BPMP_DISPLAY,
+		.type = TEGRA_ICC_ISO_DISPLAY,
+		.sid = TEGRA238_SID_ISO_NVDISPLAY,
+		.regs = {
+			.sid = {
+				.override = 0x508,
+				.security = 0x50c,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_BPMPR,
+		.name = "bpmpr",
+		.sid = TEGRA238_SID_BPMP,
+		.regs = {
+			.sid = {
+				.override = 0x498,
+				.security = 0x49c,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_BPMPW,
+		.name = "bpmpw",
+		.sid = TEGRA238_SID_BPMP,
+		.regs = {
+			.sid = {
+				.override = 0x4a0,
+				.security = 0x4a4,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_BPMPDMAR,
+		.name = "bpmpdmar",
+		.sid = TEGRA238_SID_BPMP,
+		.regs = {
+			.sid = {
+				.override = 0x4a8,
+				.security = 0x4ac,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_BPMPDMAW,
+		.name = "bpmpdmaw",
+		.sid = TEGRA238_SID_BPMP,
+		.regs = {
+			.sid = {
+				.override = 0x4b0,
+				.security = 0x4b4,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_APEDMAR,
+		.name = "apedmar",
+		.bpmp_id = TEGRA_ICC_BPMP_APEDMA,
+		.type = TEGRA_ICC_ISO_AUDIO,
+		.sid = TEGRA238_SID_ISO_APE1,
+		.regs = {
+			.sid = {
+				.override = 0x4f8,
+				.security = 0x4fc,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_APEDMAW,
+		.name = "apedmaw",
+		.bpmp_id = TEGRA_ICC_BPMP_APEDMA,
+		.type = TEGRA_ICC_ISO_AUDIO,
+		.sid = TEGRA238_SID_ISO_APE1,
+		.regs = {
+			.sid = {
+				.override = 0x500,
+				.security = 0x504,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_VICSRD,
+		.name = "vicsrd",
+		.bpmp_id = TEGRA_ICC_BPMP_VIC,
+		.type = TEGRA_ICC_NISO,
+		.sid = TEGRA238_SID_VIC,
+		.regs = {
+			.sid = {
+				.override = 0x360,
+				.security = 0x364,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_VICSWR,
+		.name = "vicswr",
+		.bpmp_id = TEGRA_ICC_BPMP_VIC,
+		.type = TEGRA_ICC_NISO,
+		.sid = TEGRA238_SID_VIC,
+		.regs = {
+			.sid = {
+				.override = 0x368,
+				.security = 0x36c,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_NVDECSRD,
+		.name = "nvdecsrd",
+		.bpmp_id = TEGRA_ICC_BPMP_NVDEC,
+		.type = TEGRA_ICC_NISO,
+		.sid = TEGRA238_SID_NVDEC,
+		.regs = {
+			.sid = {
+				.override = 0x3c0,
+				.security = 0x3c4,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_NVDECSWR,
+		.name = "nvdecswr",
+		.bpmp_id = TEGRA_ICC_BPMP_NVDEC,
+		.type = TEGRA_ICC_NISO,
+		.sid = TEGRA238_SID_NVDEC,
+		.regs = {
+			.sid = {
+				.override = 0x3c8,
+				.security = 0x3cc,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_NVENCSRD,
+		.name = "nvencsrd",
+		.bpmp_id = TEGRA_ICC_BPMP_NVENC,
+		.type = TEGRA_ICC_NISO,
+		.sid = TEGRA238_SID_NVENC,
+		.regs = {
+			.sid = {
+				.override = 0xe0,
+				.security = 0xe4,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_NVENCSWR,
+		.name = "nvencswr",
+		.bpmp_id = TEGRA_ICC_BPMP_NVENC,
+		.type = TEGRA_ICC_NISO,
+		.sid = TEGRA238_SID_NVENC,
+		.regs = {
+			.sid = {
+				.override = 0x158,
+				.security = 0x15c,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_PCIE0R,
+		.name = "pcie0r",
+		.bpmp_id = TEGRA_ICC_BPMP_PCIE_0,
+		.type = TEGRA_ICC_NISO,
+		.sid = TEGRA238_SID_PCIE0,
+		.regs = {
+			.sid = {
+				.override = 0x6c0,
+				.security = 0x6c4,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_PCIE0W,
+		.name = "pcie0w",
+		.bpmp_id = TEGRA_ICC_BPMP_PCIE_0,
+		.type = TEGRA_ICC_NISO,
+		.sid = TEGRA238_SID_PCIE0,
+		.regs = {
+			.sid = {
+				.override = 0x6c8,
+				.security = 0x6cc,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_PCIE1R,
+		.name = "pcie1r",
+		.bpmp_id = TEGRA_ICC_BPMP_PCIE_1,
+		.type = TEGRA_ICC_NISO,
+		.sid = TEGRA238_SID_PCIE1,
+		.regs = {
+			.sid = {
+				.override = 0x6d0,
+				.security = 0x6d4,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_PCIE1W,
+		.name = "pcie1w",
+		.bpmp_id = TEGRA_ICC_BPMP_PCIE_1,
+		.type = TEGRA_ICC_NISO,
+		.sid = TEGRA238_SID_PCIE1,
+		.regs = {
+			.sid = {
+				.override = 0x6d8,
+				.security = 0x6dc,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_PCIE2AR,
+		.name = "pcie2ar",
+		.bpmp_id = TEGRA_ICC_BPMP_PCIE_2,
+		.type = TEGRA_ICC_NISO,
+		.sid = TEGRA238_SID_PCIE2,
+		.regs = {
+			.sid = {
+				.override = 0x6e0,
+				.security = 0x6e4,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_PCIE2AW,
+		.name = "pcie2aw",
+		.bpmp_id = TEGRA_ICC_BPMP_PCIE_2,
+		.type = TEGRA_ICC_NISO,
+		.sid = TEGRA238_SID_PCIE2,
+		.regs = {
+			.sid = {
+				.override = 0x6e8,
+				.security = 0x6ec,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_PCIE3R,
+		.name = "pcie3r",
+		.bpmp_id = TEGRA_ICC_BPMP_PCIE_3,
+		.type = TEGRA_ICC_NISO,
+		.sid = TEGRA238_SID_PCIE3,
+		.regs = {
+			.sid = {
+				.override = 0x6f0,
+				.security = 0x6f4,
+			},
+		},
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_PCIE3W,
+		.name = "pcie3w",
+		.bpmp_id = TEGRA_ICC_BPMP_PCIE_3,
+		.type = TEGRA_ICC_NISO,
+		.sid = TEGRA238_SID_PCIE3,
+		.regs = {
+			.sid = {
+				.override = 0x6f8,
+				.security = 0x6fc,
+			},
+		},
+	}, {
+		.id = TEGRA_ICC_MC_CPU_CLUSTER0,
+		.name = "sw_cluster0",
+		.bpmp_id = TEGRA_ICC_BPMP_CPU_CLUSTER0,
+		.type = TEGRA_ICC_NISO,
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_NVL1R,
+		.name = "nvl1r",
+		.bpmp_id = TEGRA_ICC_BPMP_GPU,
+		.type = TEGRA_ICC_NISO,
+	}, {
+		.id = TEGRA234_MEMORY_CLIENT_NVL1W,
+		.name = "nvl1w",
+		.bpmp_id = TEGRA_ICC_BPMP_GPU,
+		.type = TEGRA_ICC_NISO,
+	}
+};
+
+static const struct tegra_mc_intmask tegra238_mc_intmasks[] = {
+	{
+		.reg = MC_INTMASK,
+		.mask = MC_INT_DECERR_ROUTE_SANITY | MC_INT_DECERR_GENERALIZED_CARVEOUT |
+			MC_INT_DECERR_MTS | MC_INT_SECERR_SEC | MC_INT_DECERR_VPR |
+			MC_INT_SECURITY_VIOLATION | MC_INT_DECERR_EMEM,
+	},
+};
+
+const struct tegra_mc_soc tegra238_mc_soc = {
+	.num_clients = ARRAY_SIZE(tegra238_mc_clients),
+	.clients = tegra238_mc_clients,
+	.num_address_bits = 40,
+	.num_channels = 8,
+	.client_id_mask = 0x1ff,
+	.intmasks = tegra238_mc_intmasks,
+	.num_intmasks = ARRAY_SIZE(tegra238_mc_intmasks),
+	.has_addr_hi_reg = true,
+	.ops = &tegra186_mc_ops,

This series adds Memory Controller driver support for the Tegra238 SoC.

Tegra238 is similar to Tegra234 but with a reduced memory controller configuration featuring 8 channels instead of 16. The driver reuses Tegra234 memory client IDs and ICC operations, with Tegra238-specific stream IDs for SMMU configuration.

[...]