From a9d5a97fa3828e7cbc577805eba3d0a0d35dd5a0 Mon Sep 17 00:00:00 2001 From: TOMARI Hisanobu Date: Tue, 31 Mar 2009 20:15:34 +0200 Subject: [PATCH] ide-pmac: IDE cable detection on Apple PowerBook As IDE cable used on Apple PowerBook/iBook laptops are always of "Short 40" type when the firmware says it's 80 conductor one, the cable detection should return ATA_CBL_PATA40_SHORT on those machines. This enables to automatically use UDMA5 even with drives that doesn't correctly detect those cables on Apple laptops. Signed-off-by: TOMARI Hisanobu Cc: Sergei Shtylyov Cc: benh@kernel.crashing.org [bart: beautify patch description] Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/pmac.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/ide/pmac.c b/drivers/ide/pmac.c index 24ce1f805cd..052b9bf1f8f 100644 --- a/drivers/ide/pmac.c +++ b/drivers/ide/pmac.c @@ -919,10 +919,18 @@ static u8 pmac_ide_cable_detect(ide_hwif_t *hwif) (pmac_ide_hwif_t *)dev_get_drvdata(hwif->gendev.parent); struct device_node *np = pmif->node; const char *cable = of_get_property(np, "cable-type", NULL); + struct device_node *root = of_find_node_by_path("/"); + const char *model = of_get_property(root, "model", NULL); /* Get cable type from device-tree. */ - if (cable && !strncmp(cable, "80-", 3)) - return ATA_CBL_PATA80; + if (cable && !strncmp(cable, "80-", 3)) { + /* Some drives fail to detect 80c cable in PowerBook */ + /* These machine use proprietary short IDE cable anyway */ + if (!strncmp(model, "PowerBook", 9)) + return ATA_CBL_PATA40_SHORT; + else + return ATA_CBL_PATA80; + } /* * G5's seem to have incorrect cable type in device-tree. -- 2.41.1