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Diffstat (limited to 'Documentation/devicetree/bindings/serial/pl011.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/serial/pl011.txt | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/Documentation/devicetree/bindings/serial/pl011.txt b/Documentation/devicetree/bindings/serial/pl011.txt index 52464918cfe2..ba3ecb8cb5a1 100644 --- a/Documentation/devicetree/bindings/serial/pl011.txt +++ b/Documentation/devicetree/bindings/serial/pl011.txt @@ -6,23 +6,35 @@ Required properties: - interrupts: exactly one interrupt specifier Optional properties: -- pinctrl: When present, must have one state named "default", +- pinctrl: + When present, must have one state named "default", and may contain a second name named "sleep". The former state sets up pins for ordinary operation whereas the latter state will put the associated pins to sleep when the UART is unused -- clocks: When present, the first clock listed must correspond to +- clocks: + When present, the first clock listed must correspond to the clock named UARTCLK on the IP block, i.e. the clock to the external serial line, whereas the second clock must correspond to the PCLK clocking the internal logic of the block. Just listing one clock (the first one) is deprecated. -- clocks-names: When present, the first clock listed must be named +- clocks-names: + When present, the first clock listed must be named "uartclk" and the second clock listed must be named "apb_pclk" -- dmas: When present, may have one or two dma channels. +- dmas: + When present, may have one or two dma channels. The first one must be named "rx", the second one must be named "tx". +- auto-poll: + Enables polling when using RX DMA. +- poll-rate-ms: + Rate at which poll occurs when auto-poll is set, + default 100ms. +- poll-timeout-ms: + Poll timeout when auto-poll is set, default + 3000ms. See also bindings/arm/primecell.txt |