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From: Linus Walleij <linus.walleij@linaro.org>
To: Jens Axboe <axboe@kernel.dk>, linux-ide@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org,
	Imre Kaloz <kaloz@openwrt.org>,
	Krzysztof Halasa <khalasa@piap.pl>,
	Linus Walleij <linus.walleij@linaro.org>,
	devicetree@vger.kernel.org
Subject: [PATCH 4/5 v2] pata: ixp4xx: Add DT bindings
Date: Sat, 31 Jul 2021 23:35:54 +0200	[thread overview]
Message-ID: <20210731213555.2965356-4-linus.walleij@linaro.org> (raw)
In-Reply-To: <20210731213555.2965356-1-linus.walleij@linaro.org>

This adds device tree bindings for the Intel IXP4xx compact flash card
interface.

Cc: devicetree@vger.kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v1->v2:
- Itemize the registers
- Drop the epansion bus set-up to alleviate warnings
---
 .../ata/intel,ixp4xx-compact-flash.yaml       | 61 +++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/ata/intel,ixp4xx-compact-flash.yaml

diff --git a/Documentation/devicetree/bindings/ata/intel,ixp4xx-compact-flash.yaml b/Documentation/devicetree/bindings/ata/intel,ixp4xx-compact-flash.yaml
new file mode 100644
index 000000000000..52e18600ecff
--- /dev/null
+++ b/Documentation/devicetree/bindings/ata/intel,ixp4xx-compact-flash.yaml
@@ -0,0 +1,61 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/ata/intel,ixp4xx-compact-flash.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Intel IXP4xx CompactFlash Card Controller
+
+maintainers:
+  - Linus Walleij <linus.walleij@linaro.org>
+
+description: |
+  The IXP4xx network processors have a CompactFlash interface that presents
+  a CompactFlash card to the system as a true IDE (parallel ATA) device. The
+  device is always connected to the expansion bus of the IXP4xx SoCs using one
+  or two chip select areas and address translating logic on the board. The
+  node must be placed inside a chip select node on the IXP4xx expansion bus.
+
+properties:
+  compatible:
+    const: intel,ixp4xx-compact-flash
+
+  reg:
+    items:
+      - description: Command interface registers
+      - description: Control interface registers
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+allOf:
+  - $ref: pata-common.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    bus@c4000000 {
+      compatible = "intel,ixp43x-expansion-bus-controller", "syscon";
+      reg = <0xc4000000 0x1000>;
+      native-endian;
+      #address-cells = <2>;
+      #size-cells = <1>;
+      ranges = <0 0x0 0x50000000 0x01000000>, <1 0x0 0x51000000 0x01000000>;
+      dma-ranges = <0 0x0 0x50000000 0x01000000>, <1 0x0 0x51000000 0x01000000>;
+      ide@1,0 {
+        compatible = "intel,ixp4xx-compact-flash";
+        reg = <1 0x00000000 0x1000>, <1 0x00040000 0x1000>;
+        interrupt-parent = <&gpio0>;
+        interrupts = <12 IRQ_TYPE_EDGE_RISING>;
+      };
+    };
+
+...
-- 
2.31.1


  parent reply	other threads:[~2021-07-31 21:38 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-31 21:35 [PATCH 1/5 v2] pata: ixp4xx: Use local dev variable Linus Walleij
2021-07-31 21:35 ` [PATCH 2/5 v2] pata: ixp4xx: Use IS_ENABLED() to determine endianness Linus Walleij
2021-07-31 21:35 ` [PATCH 3/5 v2] pata: ixp4xx: Refer to cmd and ctl rather than csN Linus Walleij
2021-07-31 21:35 ` Linus Walleij [this message]
2021-08-02 13:39   ` [PATCH 4/5 v2] pata: ixp4xx: Add DT bindings Rob Herring
2021-08-02 16:30   ` Rob Herring
2021-07-31 21:35 ` [PATCH 5/5 v2] pata: ixp4xx: Rewrite to use device tree Linus Walleij
2021-08-04 12:40 ` [PATCH 1/5 v2] pata: ixp4xx: Use local dev variable Linus Walleij

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