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authorWolfram Sang <w.sang@pengutronix.de>2010-10-15 14:18:21 +0200
committerDominik Brodowski <linux@dominikbrodowski.net>2010-10-15 14:31:47 +0200
commita5360df9413987ed56ce8cffad678e557eff92e1 (patch)
treeca6f3988aeeea411441e001f10ee285d7600fcf8 /drivers/pcmcia
parent3c7d2b765df974ae29a9f1d5a62e15b243a36763 (diff)
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pcmcia/yenta: guide users in case of problems with O2-bridges
Some cards need the speedups on, some need them off. As we can't detect this reliably, at least give the users a hint how to tweak the system. Reported-by: David Bluecame <david.bluecame@gmail.com> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'drivers/pcmcia')
-rw-r--r--drivers/pcmcia/o2micro.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/pcmcia/o2micro.h b/drivers/pcmcia/o2micro.h
index e74bebac2695..5096e92c7a4c 100644
--- a/drivers/pcmcia/o2micro.h
+++ b/drivers/pcmcia/o2micro.h
@@ -153,14 +153,14 @@ static int o2micro_override(struct yenta_socket *socket)
if (use_speedup) {
dev_info(&socket->dev->dev,
- "O2: enabling read prefetch/write burst\n");
+ "O2: enabling read prefetch/write burst. If you experience problems or performance issues, use the yenta_socket parameter 'o2_speedup=off'\n");
config_writeb(socket, O2_RESERVED1,
a | O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST);
config_writeb(socket, O2_RESERVED2,
b | O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST);
} else {
dev_info(&socket->dev->dev,
- "O2: disabling read prefetch/write burst\n");
+ "O2: disabling read prefetch/write burst. If you experience problems or performance issues, use the yenta_socket parameter 'o2_speedup=on'\n");
config_writeb(socket, O2_RESERVED1,
a & ~(O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST));
config_writeb(socket, O2_RESERVED2,