diff options
| author | Laurent Pinchart <laurentp@cse-semaphore.com> | 2008-07-24 20:36:37 +0400 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2008-07-28 16:48:04 +0400 |
| commit | 7485d26b7e13ee8ff82adb271ac90a996c1fe830 (patch) | |
| tree | 13bc7e6f30aa6cfb039e780b597f264eccf9d3df /Documentation/powerpc | |
| parent | dc2380ec8572fcd7f7e9579afc9fb223300d922f (diff) | |
| download | linux-7485d26b7e13ee8ff82adb271ac90a996c1fe830.tar.xz | |
cpm_uart: Modem control lines support
This patch replaces the get_mctrl/set_mctrl stubs with modem control line
read/write access through the GPIO lib.
Available modem control lines are described in the device tree using GPIO
bindings. The driver expect a GPIO pin for each of the CTS, RTS, DCD, DSR,
DTR and RI signals. Unused control lines can be left out.
Signed-off-by: Laurent Pinchart <laurentp@cse-semaphore.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'Documentation/powerpc')
| -rw-r--r-- | Documentation/powerpc/dts-bindings/fsl/cpm_qe/serial.txt | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/serial.txt b/Documentation/powerpc/dts-bindings/fsl/cpm_qe/serial.txt index b35f3482e3e4..2ea76d9d137c 100644 --- a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/serial.txt +++ b/Documentation/powerpc/dts-bindings/fsl/cpm_qe/serial.txt @@ -7,6 +7,15 @@ Currently defined compatibles: - fsl,cpm2-scc-uart - fsl,qe-uart +Modem control lines connected to GPIO controllers are listed in the gpios +property as described in booting-without-of.txt, section IX.1 in the following +order: + +CTS, RTS, DCD, DSR, DTR, and RI. + +The gpios property is optional and can be left out when control lines are +not used. + Example: serial@11a00 { @@ -18,4 +27,6 @@ Example: interrupt-parent = <&PIC>; fsl,cpm-brg = <1>; fsl,cpm-command = <00800000>; + gpios = <&gpio_c 15 0 + &gpio_d 29 0>; }; |