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| author | John Linn <john.linn@xilinx.com> | 2008-07-01 10:52:41 -0700 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2008-07-01 15:12:37 -0600 |
| commit | 1e6d1f260611387a7b4e6eae4d1dd6f62e53714d (patch) | |
| tree | 015a78089b3de3fc4746dfa1dd21e8ea050357cf /arch/powerpc/kernel/legacy_serial.c | |
| parent | 5d1a04110bfc40a86e1387b5f4382addd9aa7fbb (diff) | |
| download | lwn-1e6d1f260611387a7b4e6eae4d1dd6f62e53714d.tar.gz lwn-1e6d1f260611387a7b4e6eae4d1dd6f62e53714d.zip | |
powerpc/legacy_serial: Bail if reg-offset/shift properties are present
The legacy serial driver does not work with an 8250 type UART that is
described in the device tree with the reg-offset and reg-shift
properties. This change makes legacy_serial ignore these devices.
Signed-off-by: John Linn <john.linn@xilinx.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'arch/powerpc/kernel/legacy_serial.c')
| -rw-r--r-- | arch/powerpc/kernel/legacy_serial.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/legacy_serial.c b/arch/powerpc/kernel/legacy_serial.c index 61dd17449ddc..cf37f5ca4b71 100644 --- a/arch/powerpc/kernel/legacy_serial.c +++ b/arch/powerpc/kernel/legacy_serial.c @@ -136,6 +136,11 @@ static int __init add_legacy_soc_port(struct device_node *np, if (of_get_property(np, "clock-frequency", NULL) == NULL) return -1; + /* if reg-shift or offset, don't try to use it */ + if ((of_get_property(np, "reg-shift", NULL) != NULL) || + (of_get_property(np, "reg-offset", NULL) != NULL)) + return -1; + /* if rtas uses this device, don't try to use it as well */ if (of_get_property(np, "used-by-rtas", NULL) != NULL) return -1; |