diff options
Diffstat (limited to 'dts/Bindings/spi/spi-peripheral-props.yaml')
| -rw-r--r-- | dts/Bindings/spi/spi-peripheral-props.yaml | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/dts/Bindings/spi/spi-peripheral-props.yaml b/dts/Bindings/spi/spi-peripheral-props.yaml index 3ec2d7b837..5e32928c4f 100644 --- a/dts/Bindings/spi/spi-peripheral-props.yaml +++ b/dts/Bindings/spi/spi-peripheral-props.yaml @@ -83,8 +83,34 @@ properties: description: Delay, in microseconds, after a write transfer. + stacked-memories: + description: Several SPI memories can be wired in stacked mode. + This basically means that either a device features several chip + selects, or that different devices must be seen as a single + bigger chip. This basically doubles (or more) the total address + space with only a single additional wire, while still needing + to repeat the commands when crossing a chip boundary. The size of + each chip should be provided as members of the array. + $ref: /schemas/types.yaml#/definitions/uint64-array + minItems: 2 + maxItems: 4 + + parallel-memories: + description: Several SPI memories can be wired in parallel mode. + The devices are physically on a different buses but will always + act synchronously as each data word is spread across the + different memories (eg. even bits are stored in one memory, odd + bits in the other). This basically doubles the address space and + the throughput while greatly complexifying the wiring because as + many busses as devices must be wired. The size of each chip should + be provided as members of the array. + $ref: /schemas/types.yaml#/definitions/uint64-array + minItems: 2 + maxItems: 4 + # The controller specific properties go here. allOf: - $ref: cdns,qspi-nor-peripheral-props.yaml# + - $ref: samsung,spi-peripheral-props.yaml# additionalProperties: true |