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| author | Erwan Le Ray <erwan.leray@foss.st.com> | 2021-04-13 20:40:13 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-22 13:11:25 +0300 |
| commit | cd9de06e16104a9e37245275fa2c4a073edf2e44 (patch) | |
| tree | 352adf2385d2053d5b6b71fec5c54d76ec26b73d /Documentation | |
| parent | 8574c9e7292247b5d3ffa5db22399b3b53a0dbda (diff) | |
| download | linux-cd9de06e16104a9e37245275fa2c4a073edf2e44.tar.xz | |
dt-bindings: serial: stm32: override FIFO threshold properties
Override rx-threshold and tx-threshold properties:
- extend description
- provide default and expected values
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Signed-off-by: Erwan Le Ray <erwan.leray@foss.st.com>
Changes in v2:
Change added properties naming and factorize it in serial.yaml as proposed
by Rob Herring.
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210413174015.23011-3-erwan.leray@foss.st.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/serial/st,stm32-uart.yaml | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml b/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml index c69f8464cdf3..71a6426bc558 100644 --- a/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml +++ b/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml @@ -65,6 +65,18 @@ properties: linux,rs485-enabled-at-boot-time: true rs485-rx-during-tx: true + rx-threshold: + description: + If value is set to 1, RX FIFO threshold is disabled. + enum: [1, 2, 4, 8, 12, 14, 16] + default: 8 + + tx-threshold: + description: + If value is set to 1, TX FIFO threshold is disabled. + enum: [1, 2, 4, 8, 12, 14, 16] + default: 8 + allOf: - $ref: rs485.yaml# - $ref: serial.yaml# @@ -82,6 +94,17 @@ allOf: then: properties: rx-tx-swap: false + - if: + properties: + compatible: + contains: + enum: + - st,stm32-uart + - st,stm32f7-uart + then: + properties: + rx-threshold: false + tx-threshold: false required: - compatible @@ -96,13 +119,15 @@ examples: - | #include <dt-bindings/clock/stm32mp1-clks.h> usart1: serial@40011000 { - compatible = "st,stm32-uart"; + compatible = "st,stm32h7-uart"; reg = <0x40011000 0x400>; interrupts = <37>; clocks = <&rcc 0 164>; dmas = <&dma2 2 4 0x414 0x0>, <&dma2 7 4 0x414 0x0>; dma-names = "rx", "tx"; + rx-threshold = <4>; + tx-threshold = <4>; rs485-rts-active-low; }; |