From bb44fb70e069412c08e07f494b6b4e985f6331ac Mon Sep 17 00:00:00 2001 From: Ben Dooks Date: Tue, 5 Feb 2008 00:02:20 +0000 Subject: DM9000: Add platform flag for no attached EEPROM Allow the platform data to specify to the DM9000 driver that there is no posibility of an attached EEPROM on the device, so default all reads to 0xff and ignore any write operations. Signed-off-by: Ben Dooks Signed-off-by: Jeff Garzik --- drivers/net/dm9000.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'drivers/net') diff --git a/drivers/net/dm9000.c b/drivers/net/dm9000.c index d0cd7f945fde..afd2cf509073 100644 --- a/drivers/net/dm9000.c +++ b/drivers/net/dm9000.c @@ -405,6 +405,9 @@ static int dm9000_get_eeprom(struct net_device *dev, if ((len & 1) != 0 || (offset & 1) != 0) return -EINVAL; + if (dm->flags & DM9000_PLATF_NO_EEPROM) + return -ENOENT; + ee->magic = DM_EEPROM_MAGIC; for (i = 0; i < len; i += 2) @@ -426,6 +429,9 @@ static int dm9000_set_eeprom(struct net_device *dev, if ((len & 1) != 0 || (offset & 1) != 0) return -EINVAL; + if (dm->flags & DM9000_PLATF_NO_EEPROM) + return -ENOENT; + if (ee->magic != DM_EEPROM_MAGIC) return -EINVAL; @@ -1100,6 +1106,12 @@ dm9000_read_eeprom(board_info_t *db, int offset, u8 *to) { unsigned long flags; + if (db->flags & DM9000_PLATF_NO_EEPROM) { + to[0] = 0xff; + to[1] = 0xff; + return; + } + mutex_lock(&db->addr_lock); spin_lock_irqsave(&db->lock, flags); @@ -1134,6 +1146,9 @@ dm9000_write_eeprom(board_info_t *db, int offset, u8 *data) { unsigned long flags; + if (db->flags & DM9000_PLATF_NO_EEPROM) + return; + mutex_lock(&db->addr_lock); spin_lock_irqsave(&db->lock, flags); -- cgit v1.2.2