Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 110 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/iommu/samsung,sysmmu.yaml b/Documentation/devicetree/bindings/iommu/samsung,sysmmu.yaml
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+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iommu/samsung,sysmmu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung Exynos IOMMU H/W, System MMU (System Memory Management Unit)
+
+maintainers:
+  - Marek Szyprowski <m.szyprowski@samsung.com>
+
+description: |+
+  Samsung's Exynos architecture contains System MMUs that enables scattered
+  physical memory chunks visible as a contiguous region to DMA-capable peripheral
+  devices like MFC, FIMC, FIMD, GScaler, FIMC-IS and so forth.
+
+  System MMU is an IOMMU and supports identical translation table format to
+  ARMv7 translation tables with minimum set of page properties including access
+  permissions, shareability and security protection. In addition, System MMU has
+  another capabilities like L2 TLB or block-fetch buffers to minimize translation
+  latency.
+
+  System MMUs are in many to one relation with peripheral devices, i.e. single
+  peripheral device might have multiple System MMUs (usually one for each bus
+  master), but one System MMU can handle transactions from only one peripheral
+  device. The relation between a System MMU and the peripheral device needs to be
+  defined in device node of the peripheral device.
+
+  MFC in all Exynos SoCs and FIMD, M2M Scalers and G2D in Exynos5420 has 2 System
+  MMUs.
+  * MFC has one System MMU on its left and right bus.
+  * FIMD in Exynos5420 has one System MMU for window 0 and 4, the other system MMU
+    for window 1, 2 and 3.
+  * M2M Scalers and G2D in Exynos5420 has one System MMU on the read channel and
+    the other System MMU on the write channel.
+
+  For information on assigning System MMU controller to its peripheral devices,
+  see generic IOMMU bindings.
+
+properties:
+  compatible:
+    const: samsung,exynos-sysmmu
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    minItems: 1
+    maxItems: 2
+
+  clock-names:
+    oneOf:
+      - items:
+          - const: sysmmu
+      - items:
+          - const: sysmmu
+          - const: master
+      - items:
+          - const: aclk
+          - const: pclk
+
+  "#iommu-cells":
+    const: 0
+
+  power-domains:
+    description: |
+      Required if the System MMU is needed to gate its power.
+      Please refer to the following document:
+      Documentation/devicetree/bindings/power/pd-samsung.yaml
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - "#iommu-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/exynos5250.h>
+
+    gsc_0: scaler@13e00000 {
+      compatible = "samsung,exynos5-gsc";
+      reg = <0x13e00000 0x1000>;
+      interrupts = <0 85 0>;
+      power-domains = <&pd_gsc>;
+      clocks = <&clock CLK_GSCL0>;
+      clock-names = "gscl";
+      iommus = <&sysmmu_gsc0>;
+    };
+
+    sysmmu_gsc0: iommu@13e80000 {
+      compatible = "samsung,exynos-sysmmu";
+      reg = <0x13E80000 0x1000>;
+      interrupt-parent = <&combiner>;
+      interrupts = <2 0>;
+      clock-names = "sysmmu", "master";
+      clocks = <&clock CLK_SMMU_GSCL0>,
+               <&clock CLK_GSCL0>;
+      power-domains = <&pd_gsc>;
+      #iommu-cells = <0>;
+    };
+