[PATCH v2 03/10] dt-bindings: spi: Add Aspeed SMC controllers device tree binding

Cédric Le Goater
2022-03-02T17:42:34Z

The "interrupt" property is optional because it is only necessary for
controllers supporting DMAs (Not implemented yet in the new driver).

Cc: Chin-Ting Kuo <chin-ting_kuo@aspeedtech.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
.../bindings/spi/aspeed,ast2600-fmc.yaml | 90 +++++++++++++++++++
MAINTAINERS | 9 ++
2 files changed, 99 insertions(+)
create mode 100644 Documentation/devicetree/bindings/spi/aspeed,ast2600-fmc.yaml

diff --git a/Documentation/devicetree/bindings/spi/aspeed,ast2600-fmc.yaml b/Documentation/devicetree/bindings/spi/aspeed,ast2600-fmc.yaml
new file mode 100644
index 000000000000..0289a4f52196
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/aspeed,ast2600-fmc.yaml
@@ -0,0 +1,90 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/aspeed,ast2600-fmc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Aspeed SMC controllers bindings
+
+maintainers:
+ - Chin-Ting Kuo <chin-ting_kuo@aspeedtech.com>
+ - Cédric Le Goater <clg@kaod.org>
+
+description: |
+ This binding describes the Aspeed Static Memory Controllers (FMC and
+ SPI) of the AST2400, AST2500 and AST2600 SOCs.
+
+allOf:
+ - $ref: "spi-controller.yaml#"
+
+properties:
+ compatible:
+ enum:
+ - aspeed,ast2600-fmc
+ - aspeed,ast2600-spi
+ - aspeed,ast2500-fmc
+ - aspeed,ast2500-spi
+ - aspeed,ast2400-fmc
+ - aspeed,ast2400-spi
+
+ reg:
+ items:
+ - description: registers
+ - description: memory mapping
+
+ clocks:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+patternProperties:
+ "@[0-9a-f]+":
+ type: object
+
+ properties:
+ spi-rx-bus-width:
+ enum: [1, 2, 4]
+
+ required:
+ - reg
+
+required:
+ - compatible
+ - reg
+ - clocks
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/interrupt-controller/aspeed-scu-ic.h>
+ #include <dt-bindings/clock/ast2600-clock.h>
+
+ spi@1e620000 {
+ reg = <0x1e620000 0xc4>, <0x20000000 0x10000000>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "aspeed,ast2600-fmc";
+ clocks = <&syscon ASPEED_CLK_AHB>;
+ interrupts = <GIC_SPI 39 IRQ_TYPE_LEVEL_HIGH>;
+ flash@0 {
+ reg = < 0 >;
+ compatible = "jedec,spi-nor";
+ spi-max-frequency = <50000000>;
+ spi-rx-bus-width = <2>;
+ };
+ flash@1 {
+ reg = < 1 >;
+ compatible = "jedec,spi-nor";
+ spi-max-frequency = <50000000>;
+ spi-rx-bus-width = <2>;
+ };
+ flash@2 {
+ reg = < 2 >;
+ compatible = "jedec,spi-nor";
+ spi-max-frequency = <50000000>;
+ spi-rx-bus-width = <2>;
+ };
+ };
diff --git a/MAINTAINERS b/MAINTAINERS
index 4175103e928d..f5ab77548ef6 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2925,6 +2925,15 @@ S: Maintained
F: Documentation/devicetree/bindings/mmc/aspeed,sdhci.yaml
F: drivers/mmc/host/sdhci-of-aspeed*

+ASPEED SMC SPI DRIVER
+M: Chin-Ting Kuo <chin-ting_kuo@aspeedtech.com>
+M: Cédric Le Goater <clg@kaod.org>
+L: linux-aspeed@lists.ozlabs.org (moderated for non-subscribers)
+L: openbmc@lists.ozlabs.org (moderated for non-subscribers)
+L: linux-spi@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/spi/aspeed,ast2600-fmc.yaml
+
ASPEED VIDEO ENGINE DRIVER
M: Eddie James <eajames@linux.ibm.com>
L: linux-media@vger.kernel.org
--
2.34.1