From 7db097dcddef6718aee850d9d9ba4a29c8a9c7d9 Mon Sep 17 00:00:00 2001 From: Serge Semin Date: Fri, 15 May 2020 13:47:40 +0300 Subject: [PATCH] spi: dw: Add Tx/Rx DMA properties Since commit 22d48ad7bfac ("spi: dw: Add Elkhart Lake PSE DMA support") the spi-dw-mid.c module supports a platform DMA engine handling the DW APB SSI controller requests. Lets alter the DW SPI bindings file to accept the Rx and Tx DMA line specifiers. Signed-off-by: Serge Semin Cc: Georgy Vlasov Cc: Ramil Zaripov Cc: Alexey Malahov Cc: Thomas Bogendoerfer Cc: Paul Burton Cc: Ralf Baechle Cc: Arnd Bergmann Cc: Allison Randal Cc: Andy Shevchenko Cc: Gareth Williams Cc: linux-mips@vger.kernel.org Link: https://lore.kernel.org/r/20200515104758.6934-2-Sergey.Semin@baikalelectronics.ru Signed-off-by: Mark Brown --- Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt index 7a4702edf896..020e3168ee41 100644 --- a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt +++ b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt @@ -23,6 +23,8 @@ Optional properties: - num-cs : The number of chipselects. If omitted, this will default to 4. - reg-io-width : The I/O register width (in bytes) implemented by this device. Supported values are 2 or 4 (the default). +- dmas : Phandle + identifiers of Tx and Rx DMA channels. +- dma-names : Contains the names of the DMA channels. Must be "tx" and "rx". Child nodes as per the generic SPI binding.