linux-kernel - [PATCH v2 1/8] dt-bindings: dma: dma40: Prefer to pass sram through phandle

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230417-ux500-dma40-cleanup-v2-1-cdaa68a4b863@linaro.org>
Date:   Thu, 27 Apr 2023 14:09:56 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Vinod Koul <vkoul@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     dmaengine@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH v2 1/8] dt-bindings: dma: dma40: Prefer to pass sram
 through phandle

Extend the DMA40 bindings so that we can pass two SRAM
segments as phandles instead of directly referring to the
memory address in the second reg cell. This enables more
granular control over the SRAM, and adds the optiona LCLA
SRAM segment as well.

Deprecate the old way of passing LCPA as a second reg cell,
make sram compulsory.

Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
---
ChangeLog v1->v2:
- Enumerate phandles using inner and outer maxItems as specified
  by Rob.
- Drop quotes around reference.
---
 .../devicetree/bindings/dma/stericsson,dma40.yaml  | 36 +++++++++++++++++-----
 1 file changed, 28 insertions(+), 8 deletions(-)

diff --git a/Documentation/devicetree/bindings/dma/stericsson,dma40.yaml b/Documentation/devicetree/bindings/dma/stericsson,dma40.yaml
index 64845347f44d..1e5752b19a49 100644
--- a/Documentation/devicetree/bindings/dma/stericsson,dma40.yaml
+++ b/Documentation/devicetree/bindings/dma/stericsson,dma40.yaml
@@ -112,14 +112,23 @@ properties:
       - const: stericsson,dma40
 
   reg:
-    items:
-      - description: DMA40 memory base
-      - description: LCPA memory base
+    oneOf:
+      - items:
+          - description: DMA40 memory base
+      - items:
+          - description: DMA40 memory base
+          - description: LCPA memory base, deprecated, use eSRAM pool instead
+        deprecated: true
+
 
   reg-names:
-    items:
-      - const: base
-      - const: lcpa
+    oneOf:
+      - items:
+          - const: base
+      - items:
+          - const: base
+          - const: lcpa
+        deprecated: true
 
   interrupts:
     maxItems: 1
@@ -127,6 +136,15 @@ properties:
   clocks:
     maxItems: 1
 
+  sram:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    description: A phandle array with inner size 1 (no arg cells).
+      First phandle is the LCPA (Logical Channel Parameter Address) memory.
+      Second phandle is the  LCLA (Logical Channel Link base Address) memory.
+    maxItems: 2
+    items:
+      maxItems: 1
+
   memcpy-channels:
     $ref: /schemas/types.yaml#/definitions/uint32-array
     description: Array of u32 elements indicating which channels on the DMA
@@ -138,6 +156,7 @@ required:
   - reg
   - interrupts
   - clocks
+  - sram
   - memcpy-channels
 
 additionalProperties: false
@@ -149,8 +168,9 @@ examples:
     #include <dt-bindings/mfd/dbx500-prcmu.h>
     dma-controller@...c0000 {
         compatible = "stericsson,db8500-dma40", "stericsson,dma40";
-        reg = <0x801c0000 0x1000>, <0x40010000 0x800>;
-        reg-names = "base", "lcpa";
+        reg = <0x801c0000 0x1000>;
+        reg-names = "base";
+        sram = <&lcpa>, <&lcla>;
         interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;
         #dma-cells = <3>;
         memcpy-channels = <56 57 58 59 60>;

-- 
2.40.0