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ibm_newemac: Allow the "no flow control" EMAC feature to work 

Some PowerPC 40x chips have errata that force us not to use the integrated
flow control.  We have the feature defined, but it currently can't be used
because it is never added to EMAC_FTRS_POSSIBLE.

This adds a Kconfig option for affected platforms to select and puts the
feature in the EMAC_FTRS_POSSIBLE list.  This is set for PowerPC 405EZ
platforms as well.

Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
This commit is contained in:
Josh Boyer 2008-09-04 02:57:57 +00:00
parent 1afb7f809b
commit b68d185ab1
3 changed files with 9 additions and 0 deletions
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4
drivers/net/ibm_newemac/Kconfig
View File

@ -62,3 +62,7 @@ config IBM_NEW_EMAC_TAH
config IBM_NEW_EMAC_EMAC4
bool
default n
config IBM_NEW_EMAC_NO_FLOW_CTRL
bool
default n

2
drivers/net/ibm_newemac/core.c
View File

@ -2567,6 +2567,8 @@ static int __devinit emac_init_config(struct emac_instance *dev)
if (of_device_is_compatible(np, "ibm,emac-440ep") ||
of_device_is_compatible(np, "ibm,emac-440gr"))
dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX;
if (of_device_is_compatible(np, "ibm,emac-405ez"))
dev->features |= EMAC_FTR_NO_FLOW_CONTROL_40x;
}
/* Fixup some feature bits based on the device tree */

3
drivers/net/ibm_newemac/core.h
View File

@ -340,6 +340,9 @@ enum {
#endif
#ifdef CONFIG_IBM_NEW_EMAC_RGMII
EMAC_FTR_HAS_RGMII |
#endif
#ifdef CONFIG_IBM_NEW_EMAC_NO_FLOW_CTRL
EMAC_FTR_NO_FLOW_CONTROL_40x |
#endif
EMAC_FTR_440EP_PHY_CLK_FIX,
};