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| author | Conor Dooley <conor.dooley@microchip.com> | 2022-06-29 19:43:33 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2022-07-01 10:05:04 +0100 |
| commit | 8b037cabc4966b010c44a76e05a43d276318bc49 (patch) | |
| tree | 0a8ec755f12c358e262c1a7b69f707e2d2ca5d56 /Documentation/devicetree/bindings/spi | |
| parent | 10365cad180273dee6c5e3b3e29f951ca8e92b53 (diff) | |
| download | lwn-8b037cabc4966b010c44a76e05a43d276318bc49.tar.gz lwn-8b037cabc4966b010c44a76e05a43d276318bc49.zip | |
spi: dt-bindings: dw-apb-ssi: update spi-{r,t}x-bus-width
Most users of dw-apb-ssi use spi-{r,t}x-bus-width of 1, however the
Canaan k210 is wired up for a width of 4.
Quoting Serge:
The modern DW APB SSI controllers of v.4.* and newer also support the
enhanced SPI Modes too (Dual, Quad and Octal). Since the IP-core
version is auto-detected at run-time there is no way to create a
DT-schema correctly constraining the Rx/Tx SPI bus widths.
/endquote
As such, drop the restriction on only supporting a bus width of 1.
Link: https://lore.kernel.org/all/20220620205654.g7fyipwytbww5757@mobilestation/
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Tested-by: Niklas Cassel <niklas.cassel@wdc.com>
Link: https://lore.kernel.org/r/20220629184343.3438856-5-mail@conchuod.ie
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'Documentation/devicetree/bindings/spi')
| -rw-r--r-- | Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml index e25d44c218f2..0a43d6e0ef91 100644 --- a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml +++ b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml @@ -143,12 +143,6 @@ patternProperties: minimum: 0 maximum: 3 - spi-rx-bus-width: - const: 1 - - spi-tx-bus-width: - const: 1 - unevaluatedProperties: false required: |