[PATCH v2 0/2] Simplify compatible matching for brcmstb_memc

[PATCH v2 0/2] Simplify compatible matching for brcmstb_memc

[Florian Fainelli]

Since the conversation died off in
https://lore.kernel.org/all/20241217194439.929040-2-florian.fainelli@broadcom.com/
here is a second attempt at addressing what I understood from the
conversation back then.

Changes in v2:

- define "brcm,brcmstb-memc-ddr-rev-b.2.1" as the fallback property

Florian Fainelli (2):
  dt-bindings: memory-controller: Define fallback compatible
  memory: brcmstb_memc: Simplify compatible matching

 .../brcm,brcmstb-memc-ddr.yaml                | 54 +++++++++++-------
 drivers/memory/brcmstb_memc.c                 | 56 +------------------
 2 files changed, 36 insertions(+), 74 deletions(-)

-- 
2.43.0

[PATCH v2 1/2] dt-bindings: memory-controller: Define fallback compatible

[Florian Fainelli]

All of the DDR controllers beyond revision b.2.1 have had a consistent
layout, therefore define a "brcm,brcmstb-memc-ddr-rev-b.2.1" fallback
compatible string to match them all rather than having to continuously
add to the list.

Link: https://lore.kernel.org/all/20241217194439.929040-2-florian.fainelli@broadcom.com/
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
---
 .../brcm,brcmstb-memc-ddr.yaml                | 54 ++++++++++++-------
 1 file changed, 34 insertions(+), 20 deletions(-)

diff --git a/Documentation/devicetree/bindings/memory-controllers/brcm,brcmstb-memc-ddr.yaml b/Documentation/devicetree/bindings/memory-controllers/brcm,brcmstb-memc-ddr.yaml
index 4b072c879b02..b935894bd4fc 100644
--- a/Documentation/devicetree/bindings/memory-controllers/brcm,brcmstb-memc-ddr.yaml
+++ b/Documentation/devicetree/bindings/memory-controllers/brcm,brcmstb-memc-ddr.yaml
@@ -11,25 +11,37 @@ maintainers:
 
 properties:
   compatible:
-    items:
-      - enum:
-          - brcm,brcmstb-memc-ddr-rev-b.1.x
-          - brcm,brcmstb-memc-ddr-rev-b.2.0
-          - brcm,brcmstb-memc-ddr-rev-b.2.1
-          - brcm,brcmstb-memc-ddr-rev-b.2.2
-          - brcm,brcmstb-memc-ddr-rev-b.2.3
-          - brcm,brcmstb-memc-ddr-rev-b.2.5
-          - brcm,brcmstb-memc-ddr-rev-b.2.6
-          - brcm,brcmstb-memc-ddr-rev-b.2.7
-          - brcm,brcmstb-memc-ddr-rev-b.2.8
-          - brcm,brcmstb-memc-ddr-rev-b.3.0
-          - brcm,brcmstb-memc-ddr-rev-b.3.1
-          - brcm,brcmstb-memc-ddr-rev-c.1.0
-          - brcm,brcmstb-memc-ddr-rev-c.1.1
-          - brcm,brcmstb-memc-ddr-rev-c.1.2
-          - brcm,brcmstb-memc-ddr-rev-c.1.3
-          - brcm,brcmstb-memc-ddr-rev-c.1.4
-      - const: brcm,brcmstb-memc-ddr
+    oneOf:
+      - description: Revision > 2.1 controllers
+        items:
+          - enum:
+              - brcm,brcmstb-memc-ddr-rev-b.2.2
+              - brcm,brcmstb-memc-ddr-rev-b.2.3
+              - brcm,brcmstb-memc-ddr-rev-b.2.5
+              - brcm,brcmstb-memc-ddr-rev-b.2.6
+              - brcm,brcmstb-memc-ddr-rev-b.2.7
+              - brcm,brcmstb-memc-ddr-rev-b.2.8
+              - brcm,brcmstb-memc-ddr-rev-b.3.0
+              - brcm,brcmstb-memc-ddr-rev-b.3.1
+              - brcm,brcmstb-memc-ddr-rev-c.1.0
+              - brcm,brcmstb-memc-ddr-rev-c.1.1
+              - brcm,brcmstb-memc-ddr-rev-c.1.2
+              - brcm,brcmstb-memc-ddr-rev-c.1.3
+              - brcm,brcmstb-memc-ddr-rev-c.1.4
+          - const: brcm,brcmstb-memc-ddr-rev-b.2.1
+          - const: brcm,brcmstb-memc-ddr
+      - description: Revision 2.1 controllers
+        items:
+          - const: brcm,brcmstb-memc-ddr-rev-b.2.1
+          - const: brcm,brcmstb-memc-ddr
+      - description: Revision 2.0 controllers
+        items:
+          - const: brcm,brcmstb-memc-ddr-rev-b.2.0
+          - const: brcm,brcmstb-memc-ddr
+      - description: Revision 1.x controllers
+        items:
+          - const: brcm,brcmstb-memc-ddr-rev-b.1.x
+          - const: brcm,brcmstb-memc-ddr
 
   reg:
     maxItems: 1
@@ -46,7 +58,9 @@ additionalProperties: false
 examples:
   - |
     memory-controller@9902000 {
-        compatible = "brcm,brcmstb-memc-ddr-rev-c.1.1", "brcm,brcmstb-memc-ddr";
+        compatible = "brcm,brcmstb-memc-ddr-rev-c.1.1",
+                     "brcm,brcmstb-memc-ddr-rev-b.2.1",
+                     "brcm,brcmstb-memc-ddr";
         reg = <0x9902000 0x600>;
         clock-frequency = <2133000000>;
     };
-- 
2.43.0

[PATCH v2 2/2] memory: brcmstb_memc: Simplify compatible matching

[Florian Fainelli]

Now that a "brcm,brcmstb-memc-ddr-rev-b.2.x" fallback compatible string
has been defined, we can greatly simplify the matching within the driver
to only look for that compatible string and nothing else.

The fallback "brcm,brcmstb-memc-ddr" is also updated to assume the V21
register layout since that is the most common nowadays.

Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
---
 drivers/memory/brcmstb_memc.c | 56 ++---------------------------------
 1 file changed, 2 insertions(+), 54 deletions(-)

diff --git a/drivers/memory/brcmstb_memc.c b/drivers/memory/brcmstb_memc.c
index c87b37e2c1f0..ba73470b1b13 100644
--- a/drivers/memory/brcmstb_memc.c
+++ b/drivers/memory/brcmstb_memc.c
@@ -184,62 +184,10 @@ static const struct of_device_id brcmstb_memc_of_match[] = {
 		.compatible = "brcm,brcmstb-memc-ddr-rev-b.2.1",
 		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
 	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-b.2.2",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-b.2.3",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-b.2.5",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-b.2.6",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-b.2.7",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-b.2.8",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-b.3.0",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-b.3.1",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-c.1.0",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-c.1.1",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-c.1.2",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-c.1.3",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-c.1.4",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	/* default to the original offset */
+	/* default to the V21 offset */
 	{
 		.compatible = "brcm,brcmstb-memc-ddr",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V1X]
+		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
 	},
 	{}
 };
-- 
2.43.0

[PATCH v2 2/2] memory: brcmstb_memc: Simplify compatible matching

[Florian Fainelli]

Now that a "brcm,brcmstb-memc-ddr-rev-b.2.x" fallback compatible string
has been defined, we can greatly simplify the matching within the driver
to only look for that compatible string and nothing else.

The fallback "brcm,brcmstb-memc-ddr" is also updated to assume the V21
register layout since that is the most common nowadays.

Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
---
 drivers/memory/brcmstb_memc.c | 56 ++---------------------------------
 1 file changed, 2 insertions(+), 54 deletions(-)

diff --git a/drivers/memory/brcmstb_memc.c b/drivers/memory/brcmstb_memc.c
index c87b37e2c1f0..ba73470b1b13 100644
--- a/drivers/memory/brcmstb_memc.c
+++ b/drivers/memory/brcmstb_memc.c
@@ -184,62 +184,10 @@ static const struct of_device_id brcmstb_memc_of_match[] = {
 		.compatible = "brcm,brcmstb-memc-ddr-rev-b.2.1",
 		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
 	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-b.2.2",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-b.2.3",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-b.2.5",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-b.2.6",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-b.2.7",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-b.2.8",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-b.3.0",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-b.3.1",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-c.1.0",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-c.1.1",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-c.1.2",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-c.1.3",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	{
-		.compatible = "brcm,brcmstb-memc-ddr-rev-c.1.4",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
-	},
-	/* default to the original offset */
+	/* default to the V21 offset */
 	{
 		.compatible = "brcm,brcmstb-memc-ddr",
-		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V1X]
+		.data = &brcmstb_memc_versions[BRCMSTB_MEMC_V21]
 	},
 	{}
 };
-- 
2.43.0