[PATCH 2/2] dt-bindings: memory: tegra: Add nvidia,tegra238-mc compatible

Ashish Mhetre
2026-03-31T11:24:18Z

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 <amhetre@nvidia.com>
---
.../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

diff --git a/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra186-mc.yaml b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra186-mc.yaml
index 7b03b589168b..e008cb1ccd28 100644
--- a/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra186-mc.yaml
+++ b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra186-mc.yaml
@@ -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: 8 memory controller channels, 1 broadcast, 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:
diff --git a/include/dt-bindings/memory/nvidia,tegra238-mc.h b/include/dt-bindings/memory/nvidia,tegra238-mc.h
new file mode 100644
index 000000000000..be24c0eb3f15
--- /dev/null
+++ b/include/dt-bindings/memory/nvidia,tegra238-mc.h
@@ -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 */
+#define TEGRA238_SID_HC_VM0 0x2c
+#define TEGRA238_SID_HC_VM1 0x2d
+#define TEGRA238_SID_HC_VM2 0x2e
+#define TEGRA238_SID_HC_VM3 0x2f
+#define TEGRA238_SID_HC_VM4 0x30
+#define TEGRA238_SID_HC_VM5 0x31
+#define TEGRA238_SID_HC_VM6 0x32
+#define TEGRA238_SID_HC_VM7 0x33
+
+#endif
--
2.50.1