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| author | Jonathan Corbet <corbet@lwn.net> | 2019-07-22 22:42:10 +0300 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2019-07-22 22:42:10 +0300 |
| commit | e27a24210aa17b8a0cd462865130fe73afd7e001 (patch) | |
| tree | b2d7b8311d280244fad3166792e8f447081a8bc9 /Documentation/devicetree/bindings/serial/8250.txt | |
| parent | 224d5fd43d250f850d64fb6d668114aff29d7022 (diff) | |
| parent | 5f9e832c137075045d15cd6899ab0505cfb2ca4b (diff) | |
| download | linux-e27a24210aa17b8a0cd462865130fe73afd7e001.tar.xz | |
Merge tag 'v5.3-rc1' into docs-next
Pull in all of the massive docs changes from elsewhere.
Diffstat (limited to 'Documentation/devicetree/bindings/serial/8250.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/serial/8250.txt | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/serial/8250.txt b/Documentation/devicetree/bindings/serial/8250.txt index 3cba12f855b7..20d351f268ef 100644 --- a/Documentation/devicetree/bindings/serial/8250.txt +++ b/Documentation/devicetree/bindings/serial/8250.txt @@ -53,6 +53,9 @@ Optional properties: programmable TX FIFO thresholds. - resets : phandle + reset specifier pairs - overrun-throttle-ms : how long to pause uart rx when input overrun is encountered. +- {rts,cts,dtr,dsr,rng,dcd}-gpios: specify a GPIO for RTS/CTS/DTR/DSR/RI/DCD + line respectively. It will use specified GPIO instead of the peripheral + function pin for the UART feature. If unsure, don't specify this property. Note: * fsl,ns16550: @@ -74,3 +77,19 @@ Example: interrupts = <10>; reg-shift = <2>; }; + +Example for OMAP UART using GPIO-based modem control signals: + + uart4: serial@49042000 { + compatible = "ti,omap3-uart"; + reg = <0x49042000 0x400>; + interrupts = <80>; + ti,hwmods = "uart4"; + clock-frequency = <48000000>; + cts-gpios = <&gpio3 5 GPIO_ACTIVE_LOW>; + rts-gpios = <&gpio3 6 GPIO_ACTIVE_LOW>; + dtr-gpios = <&gpio1 12 GPIO_ACTIVE_LOW>; + dsr-gpios = <&gpio1 13 GPIO_ACTIVE_LOW>; + dcd-gpios = <&gpio1 14 GPIO_ACTIVE_LOW>; + rng-gpios = <&gpio1 15 GPIO_ACTIVE_LOW>; + }; |