* [PATCH 5/6] arcnet: com20020: Fixup missing SLOWARB bit
@ 2018-06-11 14:27 Andrea Greco
0 siblings, 0 replies; only message in thread
From: Andrea Greco @ 2018-06-11 14:27 UTC (permalink / raw)
To: davem; +Cc: tobin, Andrea Greco, Michael Grzeschik, netdev, linux-kernel
From: Andrea Greco <a.greco@4sigma.it>
If com20020 clock is major of 40Mhz SLOWARB bit is requested.
Signed-off-by: Andrea Greco <a.greco@4sigma.it>
---
drivers/net/arcnet/com20020.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/net/arcnet/com20020.c b/drivers/net/arcnet/com20020.c
index 8d979a66d8e9..1a0fd30fe8ae 100644
--- a/drivers/net/arcnet/com20020.c
+++ b/drivers/net/arcnet/com20020.c
@@ -133,6 +133,10 @@ int com20020_check(struct net_device *dev)
lp->setup = lp->clockm ? 0 : (lp->clockp << 1);
lp->setup2 = (lp->clockm << 4) | 8;
+ /* If clock is major of 40Mhz, SLOWARB bit must be set */
+ if (lp->clockm > 1)
+ lp->setup2 |= SLOWARB;
+
/* CHECK: should we do this for SOHARD cards ? */
/* Enable P1Mode for backplane mode */
lp->setup = lp->setup | P1MODE;
--
2.14.4
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