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| author | Laurent Pinchart <laurentp@cse-semaphore.com> | 2008-05-26 13:53:21 +0400 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2008-05-31 06:18:25 +0400 |
| commit | a5edeccb1a8432ae5d9fb9bccea5a4b64c565017 (patch) | |
| tree | d55dfa3802a65d3a3372f3487fb42b8495f96f2c /Documentation/powerpc | |
| parent | 62c78329581e76347e1078b8ea996b603be3efec (diff) | |
| download | linux-a5edeccb1a8432ae5d9fb9bccea5a4b64c565017.tar.xz | |
net: OpenFirmware GPIO based MDIO bitbang driver
This patch adds an MDIO bitbang driver that uses the GPIO library and its
OF bindings to access the bus I/Os.
Signed-off-by: Laurent Pinchart <laurentp@cse-semaphore.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'Documentation/powerpc')
| -rw-r--r-- | Documentation/powerpc/booting-without-of.txt | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/Documentation/powerpc/booting-without-of.txt b/Documentation/powerpc/booting-without-of.txt index 1d2a772506cf..46a9dba11f2f 100644 --- a/Documentation/powerpc/booting-without-of.txt +++ b/Documentation/powerpc/booting-without-of.txt @@ -58,6 +58,7 @@ Table of Contents o) Xilinx IP cores p) Freescale Synchronous Serial Interface q) USB EHCI controllers + r) MDIO on GPIOs VII - Marvell Discovery mv64[345]6x System Controller chips 1) The /system-controller node @@ -2870,6 +2871,26 @@ platforms are moved over to use the flattened-device-tree model. reg = <0xe8000000 32>; }; + r) MDIO on GPIOs + + Currently defined compatibles: + - virtual,gpio-mdio + + MDC and MDIO lines connected to GPIO controllers are listed in the + gpios property as described in section VIII.1 in the following order: + + MDC, MDIO. + + Example: + + mdio { + compatible = "virtual,mdio-gpio"; + #address-cells = <1>; + #size-cells = <0>; + gpios = <&qe_pio_a 11 + &qe_pio_c 6>; + }; + VII - Marvell Discovery mv64[345]6x System Controller chips =========================================================== |