From: "Jonathan Neuschäfer" <j.neuschaefer@gmx.net>
To: linux-spi@vger.kernel.org, openbmc@lists.ozlabs.org
Cc: "Lee Jones" <lee@kernel.org>, "Rob Herring" <robh+dt@kernel.org>,
"Krzysztof Kozlowski" <krzysztof.kozlowski+dt@linaro.org>,
"Jonathan Neuschäfer" <j.neuschaefer@gmx.net>,
"Mark Brown" <broonie@kernel.org>,
"Linus Walleij" <linus.walleij@linaro.org>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-gpio@vger.kernel.org
Subject: [PATCH 3/8] dt-bindings: spi: Add Nuvoton WPCM450 Flash Interface Unit (FIU)
Date: Sat, 5 Nov 2022 19:59:06 +0100 [thread overview]
Message-ID: <20221105185911.1547847-4-j.neuschaefer@gmx.net> (raw)
In-Reply-To: <20221105185911.1547847-1-j.neuschaefer@gmx.net>
The Flash Interface Unit (FIU) is the SPI flash controller in the
Nuvoton WPCM450 BMC SoC. It supports four chip selects, and direct
(memory-mapped) access to 16 MiB per chip. Larger flash chips can be
accessed by software-defined SPI transfers.
The FIU in newer NPCM7xx SoCs is not compatible with the WPCM450 FIU.
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
---
.../bindings/spi/nuvoton,wpcm450-fiu.yaml | 76 +++++++++++++++++++
1 file changed, 76 insertions(+)
create mode 100644 Documentation/devicetree/bindings/spi/nuvoton,wpcm450-fiu.yaml
diff --git a/Documentation/devicetree/bindings/spi/nuvoton,wpcm450-fiu.yaml b/Documentation/devicetree/bindings/spi/nuvoton,wpcm450-fiu.yaml
new file mode 100644
index 0000000000000..dc0ea2184f8d0
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/nuvoton,wpcm450-fiu.yaml
@@ -0,0 +1,76 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/nuvoton,wpcm450-fiu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nuvoton WPCM450 Flash Interface Unit (FIU)
+
+maintainers:
+ - Jonathan Neuschäfer <j.neuschaefer@gmx.net>
+
+allOf:
+ - $ref: "/schemas/spi/spi-controller.yaml#"
+
+properties:
+ compatible:
+ const: nuvoton,wpcm450-fiu
+
+ reg:
+ items:
+ - description: FIU registers
+ - description: Memory-mapped flash contents
+
+ reg-names:
+ items:
+ - const: control
+ - const: memory
+ minItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ nuvoton,shm:
+ $ref: /schemas/types.yaml#/definitions/phandle
+ description: a phandle to the SHM block (see ../arm/nuvoton,shm.yaml)
+
+required:
+ - compatible
+ - reg
+ - clocks
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/nuvoton,wpcm450-clk.h>
+ spi@c8000000 {
+ compatible = "nuvoton,wpcm450-fiu";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0xc8000000 0x1000>, <0xc0000000 0x4000000>;
+ reg-names = "control", "memory";
+ clocks = <&clk WPCM450_CLK_FIU>;
+ nuvoton,shm = <&shm>;
+
+ flash@0 {
+ compatible = "jedec,spi-nor";
+ };
+ };
+
+ shm: syscon@c8001000 {
+ compatible = "nuvoton,wpcm450-shm", "syscon";
+ reg = <0xc8001000 0x1000>;
+ };
+
+ - |
+ #include <dt-bindings/clock/nuvoton,wpcm450-clk.h>
+ spi@c8000000 {
+ compatible = "nuvoton,wpcm450-fiu";
+ // the "memory" resource may be omitted
+ reg = <0xc8000000 0x1000>;
+ reg-names = "control";
+ };
--
2.35.1
next prev parent reply other threads:[~2022-11-05 18:59 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-05 18:59 [PATCH 0/8] Nuvoton WPCM450 FIU SPI flash controller Jonathan Neuschäfer
2022-11-05 18:59 ` [PATCH 1/8] pinctrl: nuvoton: wpcm450: Refactor MFSEL setting code Jonathan Neuschäfer
2022-11-05 18:59 ` [PATCH 2/8] pinctrl: nuvoton: wpcm450: Fix handling of inverted MFSEL bits Jonathan Neuschäfer
2022-11-05 18:59 ` Jonathan Neuschäfer [this message]
2022-11-06 9:38 ` [PATCH 3/8] dt-bindings: spi: Add Nuvoton WPCM450 Flash Interface Unit (FIU) Krzysztof Kozlowski
2022-11-06 14:45 ` Jonathan Neuschäfer
2022-11-07 8:09 ` Krzysztof Kozlowski
2022-11-07 12:12 ` Jonathan Neuschäfer
2022-11-06 13:27 ` Rob Herring
2022-11-05 18:59 ` [PATCH 4/8] dt-bindings: mfd: syscon: Add nuvoton,wpcm450-shm Jonathan Neuschäfer
2022-11-06 9:39 ` Krzysztof Kozlowski
2022-11-07 9:20 ` Lee Jones
2022-11-05 18:59 ` [PATCH 5/8] ARM: dts: wpcm450: Add FIU SPI controller node Jonathan Neuschäfer
2022-11-05 18:59 ` [PATCH 6/8] ARM: dts: wpcm450-supermicro-x9sci-ln4f: Add SPI flash Jonathan Neuschäfer
2022-11-05 18:59 ` [PATCH 7/8] spi: wpcm-fiu: Add driver for Nuvoton WPCM450 Flash Interface Unit (FIU) Jonathan Neuschäfer
2022-11-05 21:35 ` kernel test robot
2022-11-06 14:51 ` Jonathan Neuschäfer
2022-11-05 21:45 ` kernel test robot
2022-11-05 18:59 ` [PATCH 8/8] spi: wpcm-fiu: Add direct map support Jonathan Neuschäfer
2022-11-05 21:35 ` kernel test robot
2022-11-06 14:49 ` Jonathan Neuschäfer
2022-11-09 8:41 ` [PATCH 0/8] Nuvoton WPCM450 FIU SPI flash controller Linus Walleij
2022-11-09 10:08 ` Jonathan Neuschäfer
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