linux-kernel - [PATCH 02/17] dt-bindings: spi: dw: Add DMA properties bindings

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Date:   Fri, 8 May 2020 16:29:27 +0300
From:   Serge Semin <Sergey.Semin@...kalelectronics.ru>
To:     Mark Brown <broonie@...nel.org>, Rob Herring <robh+dt@...nel.org>
CC:     Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Serge Semin <fancer.lancer@...il.com>,
        Georgy Vlasov <Georgy.Vlasov@...kalelectronics.ru>,
        Ramil Zaripov <Ramil.Zaripov@...kalelectronics.ru>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Paul Burton <paulburton@...nel.org>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Arnd Bergmann <arnd@...db.de>,
        Allison Randal <allison@...utok.net>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Gareth Williams <gareth.williams.jx@...esas.com>,
        <linux-mips@...r.kernel.org>, <linux-spi@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 02/17] dt-bindings: spi: dw: Add DMA properties bindings

Since DW SPI controller may use DW DMA engine to perform the CPU-less
Tx/Rx SPI transfers and the DW SPI driver now supports it, lets alter
the DW SPI bindings file to accept the Rx and Tx DMA line specifiers.

Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
Cc: Georgy Vlasov <Georgy.Vlasov@...kalelectronics.ru>
Cc: Ramil Zaripov <Ramil.Zaripov@...kalelectronics.ru>
Cc: Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc: Paul Burton <paulburton@...nel.org>
Cc: Ralf Baechle <ralf@...ux-mips.org>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Allison Randal <allison@...utok.net>
Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: Gareth Williams <gareth.williams.jx@...esas.com>
Cc: linux-mips@...r.kernel.org
---
 .../devicetree/bindings/spi/snps,dw-apb-ssi.yaml       | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
index e2f6d8aa6181..454208842084 100644
--- a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
+++ b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
@@ -73,6 +73,16 @@ properties:
     minimum: 1
     maximum: 4
 
+  dmas:
+    items:
+      - description: TX DMA Channel
+      - description: RX DMA Channel
+
+  dma-names:
+    items:
+      - const: tx
+      - const: rx
+
 patternProperties:
   "^.*@[0-9a-f]+$":
     type: object
-- 
2.25.1