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From: Gareth Williams <gareth.williams.jx@renesas.com>
To: Mark Brown <broonie@kernel.org>, Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>
Cc: Phil Edworthy <phil.edworthy@renesas.com>,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	linux-spi@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Gareth Williams <gareth.williams.jx@renesas.com>
Subject: [PATCH v2 1/4] dt: spi: Add Renesas RZ/N1 binding documentation
Date: Wed, 18 Sep 2019 09:04:33 +0100	[thread overview]
Message-ID: <1568793876-9009-2-git-send-email-gareth.williams.jx@renesas.com> (raw)
In-Reply-To: <1568793876-9009-1-git-send-email-gareth.williams.jx@renesas.com>

From: Phil Edworthy <phil.edworthy@renesas.com>

The Renesas RZ/N1 SPI Controller is based on the Synopsys DW SSI, but has
additional registers for software CS control and DMA. This patch does not
address the changes required for DMA support, it simply adds the compatible
string. The CS functionality is not very useful and also not needed as
Linux can use gpios for the CS signals.

Add a compatible string to handle any unforeseen issues that may arise, and
pave the way for DMA support.

Signed-off-by: Gareth Williams <gareth.williams.jx@renesas.com>
Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
---
Note: All the other manufacturers detail their compatible strings in
snps,dw-apb-ssi.txt. I think it makes sense for rzn1 to be in it's own file
due to the changes made to the peripheral for DMA support.

v2:
 - No changes.
---
 Documentation/devicetree/bindings/spi/renesas,rzn1-spi.txt | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/spi/renesas,rzn1-spi.txt

diff --git a/Documentation/devicetree/bindings/spi/renesas,rzn1-spi.txt b/Documentation/devicetree/bindings/spi/renesas,rzn1-spi.txt
new file mode 100644
index 0000000..fb1a672
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/renesas,rzn1-spi.txt
@@ -0,0 +1,11 @@
+Renesas RZ/N1 SPI Controller
+
+This controller is based on the Synopsys DW Synchronous Serial Interface and
+inherits all properties defined in snps,dw-apb-ssi.txt except for the
+compatible property.
+
+Required properties:
+- compatible : The device specific string followed by the generic RZ/N1 string.
+   Therefore it must be one of:
+   "renesas,r9a06g032-spi", "renesas,rzn1-spi"
+   "renesas,r9a06g033-spi", "renesas,rzn1-spi"
-- 
2.7.4


  reply	other threads:[~2019-09-18  8:05 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-18  8:04 [PATCH v2 0/4] spi: dw: Add basic runtime PM support Gareth Williams
2019-09-18  8:04 ` Gareth Williams [this message]
2019-10-01 11:41   ` Applied "dt: spi: Add Renesas RZ/N1 binding documentation" to the spi tree Mark Brown
2019-10-01 11:41     ` Mark Brown
2019-10-01 11:43   ` [PATCH v2 1/4] dt: spi: Add Renesas RZ/N1 binding documentation Rob Herring
2019-10-01 11:43     ` Rob Herring
2019-09-18  8:04 ` [PATCH v2 2/4] dt-bindings: snps,dw-apb-ssi: Add optional clock domain information Gareth Williams
2019-10-01 11:41   ` Applied "dt-bindings: snps,dw-apb-ssi: Add optional clock domain information" to the spi tree Mark Brown
2019-10-01 11:41     ` Mark Brown
2019-10-01 12:02   ` [PATCH v2 2/4] dt-bindings: snps,dw-apb-ssi: Add optional clock domain information Rob Herring
2019-10-01 13:50     ` Gareth Williams
2019-10-01 14:51       ` Geert Uytterhoeven
2019-09-18  8:04 ` [PATCH v2 3/4] spi: dw: Add basic runtime PM support Gareth Williams
2019-10-01 11:41   ` Applied "spi: dw: Add basic runtime PM support" to the spi tree Mark Brown
2019-10-01 11:41     ` Mark Brown
2019-09-18  8:04 ` [PATCH v2 4/4] spi: dw: Add compatible string for Renesas RZ/N1 SPI Controller Gareth Williams
2019-10-01 11:41   ` Applied "spi: dw: Add compatible string for Renesas RZ/N1 SPI Controller" to the spi tree Mark Brown
2019-10-01 11:41     ` Mark Brown
2019-09-19 13:31 ` [PATCH v2 0/4] spi: dw: Add basic runtime PM support Mark Brown
2019-09-19 15:14   ` Gareth Williams
2019-09-19 15:23     ` Mark Brown

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