linux-kernel - [PATCHv3 2/5] spi: dt-bindings: support devices with multiple chipselects

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Date:   Fri, 28 May 2021 13:33:44 +0200
From:   Sebastian Reichel <sebastian.reichel@...labora.com>
To:     Mark Brown <broonie@...nel.org>, Rob Herring <robh+dt@...nel.org>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>, Ian Ray <ian.ray@...com>,
        linux-kernel@...r.kernel.org, linux-spi@...r.kernel.org,
        devicetree@...r.kernel.org, kernel@...labora.com,
        Sebastian Reichel <sebastian.reichel@...labora.com>
Subject: [PATCHv3 2/5] spi: dt-bindings: support devices with multiple chipselects

Add binding support for devices, that have more than one
chip select. A typical example are SPI connected microcontroller,
that can also be programmed over SPI like NXP Kinetis or
chips with a configuration and a data chip select, such as
Microchip's MRF89XA transceiver.

Signed-off-by: Sebastian Reichel <sebastian.reichel@...labora.com>
---
 Documentation/devicetree/bindings/spi/spi-controller.yaml | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/spi/spi-controller.yaml b/Documentation/devicetree/bindings/spi/spi-controller.yaml
index 0477396e4945..faef4f6f55b8 100644
--- a/Documentation/devicetree/bindings/spi/spi-controller.yaml
+++ b/Documentation/devicetree/bindings/spi/spi-controller.yaml
@@ -114,8 +114,11 @@ patternProperties:
           Compatible of the SPI device.
 
       reg:
-        minimum: 0
-        maximum: 256
+        minItems: 1
+        maxItems: 256
+        items:
+          minimum: 0
+          maximum: 256
         description:
           Chip select used by the device.
 
-- 
2.30.2