From: Alexandru Ardelean <alexandru.ardelean@analog.com>
To: <linux-spi@vger.kernel.org>, <devicetree@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Cc: <broonie@kernel.org>, <robh+dt@kernel.org>,
<dragos.bogdan@analog.com>, <andy.shevchenko@gmail.com>,
Alexandru Ardelean <alexandru.ardelean@analog.com>
Subject: [PATCH v4 3/3] spi: dt-bindings: document zero value for spi-{rx,tx}-bus-width properties
Date: Thu, 3 Dec 2020 16:05:31 +0200 [thread overview]
Message-ID: <20201203140531.74470-3-alexandru.ardelean@analog.com> (raw)
In-Reply-To: <20201203140531.74470-1-alexandru.ardelean@analog.com>
Following a change to the SPI framework, providing a value of zero for
'spi-rx-bus-width' and 'spi-tx-bus-width' is now possible and will
essentially mean that no RX or TX is allowed.
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
---
Changelog v3 -> v4:
* https://lore.kernel.org/linux-spi/20201127130834.136348-3-alexandru.ardelean@analog.com/
* fix typos
Documentation/devicetree/bindings/spi/spi-controller.yaml | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/spi/spi-controller.yaml b/Documentation/devicetree/bindings/spi/spi-controller.yaml
index 1b56d5e40f1f..cf663e4a4afe 100644
--- a/Documentation/devicetree/bindings/spi/spi-controller.yaml
+++ b/Documentation/devicetree/bindings/spi/spi-controller.yaml
@@ -125,8 +125,9 @@ patternProperties:
spi-rx-bus-width:
description:
Bus width to the SPI bus used for read transfers.
+ If 0 is provided, then no RX will be possible on this device.
$ref: /schemas/types.yaml#/definitions/uint32
- enum: [1, 2, 4, 8]
+ enum: [0, 1, 2, 4, 8]
default: 1
spi-rx-delay-us:
@@ -136,8 +137,9 @@ patternProperties:
spi-tx-bus-width:
description:
Bus width to the SPI bus used for write transfers.
+ If 0 is provided, then no TX will be possible on this device.
$ref: /schemas/types.yaml#/definitions/uint32
- enum: [1, 2, 4, 8]
+ enum: [0, 1, 2, 4, 8]
default: 1
spi-tx-delay-us:
--
2.17.1
next prev parent reply other threads:[~2020-12-03 14:02 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-03 14:05 [PATCH v4 1/3] spi: uapi: unify SPI modes into a single spi.h header Alexandru Ardelean
2020-12-03 14:05 ` [PATCH v4 2/3] spi: Add SPI_NO_TX/RX support Alexandru Ardelean
2020-12-03 14:10 ` Andy Shevchenko
2020-12-03 14:27 ` Andy Shevchenko
2020-12-03 14:24 ` Andy Shevchenko
2020-12-03 14:05 ` Alexandru Ardelean [this message]
2020-12-09 20:13 ` [PATCH v4 3/3] spi: dt-bindings: document zero value for spi-{rx,tx}-bus-width properties Rob Herring
2020-12-03 14:14 ` [PATCH v4 1/3] spi: uapi: unify SPI modes into a single spi.h header Andy Shevchenko
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