linux-kernel - [PATCH v3 06/10] dt-bindings: mtd: update STM32 FMC2 NAND controller documentation

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Date:   Tue, 5 May 2020 19:11:04 +0200
From:   Christophe Kerello <christophe.kerello@...com>
To:     <miquel.raynal@...tlin.com>, <richard@....at>, <vigneshr@...com>,
        <robh+dt@...nel.org>, <mark.rutland@....com>,
        <gregkh@...uxfoundation.org>, <boris.brezillon@...labora.com>
CC:     <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <devicetree@...r.kernel.org>, <marex@...x.de>,
        Christophe Kerello <christophe.kerello@...com>
Subject: [PATCH v3 06/10] dt-bindings: mtd: update STM32 FMC2 NAND controller documentation

These bindings can be used on SOCs where the FMC2 NAND controller is
in standalone. In case that the FMC2 embeds 2 controllers (an external
bus controller and a raw NAND controller), the register base and the
clock will be defined in the parent node. It is the reason why the
register base address and the clock are now optional.

Signed-off-by: Christophe Kerello <christophe.kerello@...com>
---
 .../devicetree/bindings/mtd/st,stm32-fmc2-nand.yaml   | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/Documentation/devicetree/bindings/mtd/st,stm32-fmc2-nand.yaml b/Documentation/devicetree/bindings/mtd/st,stm32-fmc2-nand.yaml
index b059267..68fac1a 100644
--- a/Documentation/devicetree/bindings/mtd/st,stm32-fmc2-nand.yaml
+++ b/Documentation/devicetree/bindings/mtd/st,stm32-fmc2-nand.yaml
@@ -18,13 +18,15 @@ properties:
 
   reg:
     items:
-      - description: Registers
+      - description: Registers (optional)
       - description: Chip select 0 data
       - description: Chip select 0 command
       - description: Chip select 0 address space
       - description: Chip select 1 data
       - description: Chip select 1 command
       - description: Chip select 1 address space
+    minItems: 6
+    maxItems: 7
 
   interrupts:
     maxItems: 1
@@ -61,7 +63,6 @@ required:
   - compatible
   - reg
   - interrupts
-  - clocks
 
 examples:
   - |
@@ -77,13 +78,13 @@ examples:
             <0x81000000 0x1000>,
             <0x89010000 0x1000>,
             <0x89020000 0x1000>;
-            interrupts = <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>;
-            dmas = <&mdma1 20 0x10 0x12000a02 0x0 0x0>,
-                   <&mdma1 20 0x10 0x12000a08 0x0 0x0>,
-                   <&mdma1 21 0x10 0x12000a0a 0x0 0x0>;
-            dma-names = "tx", "rx", "ecc";
-            clocks = <&rcc FMC_K>;
-            resets = <&rcc FMC_R>;
+      interrupts = <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>;
+      dmas = <&mdma1 20 0x2 0x12000a02 0x0 0x0>,
+             <&mdma1 20 0x2 0x12000a08 0x0 0x0>,
+             <&mdma1 21 0x2 0x12000a0a 0x0 0x0>;
+      dma-names = "tx", "rx", "ecc";
+      clocks = <&rcc FMC_K>;
+      resets = <&rcc FMC_R>;
       #address-cells = <1>;
       #size-cells = <0>;
 
-- 
1.9.1