[PATCH] net: tulip: Set PCI revision to match dec21143

[Marek Vasut <marek.vasut@gmail.com>]

The tulip driver claims to emulate dec21143 and it does not emulate dec21142.
The dec21142 and dec21143 can be discerned by the PCI revision register,
where dec21142 reports value < 0x20 and dec21143 value >= 0x20. E.g. the
U-Boot 'tulip' driver also only supports dec21143 and verifies that the
PCI revision ID is >= 0x20, otherwise refuses to operate such a card.

This patch sets the PCI revision ID to 0x20 to match the dec21143 and
thus also permits e.g. U-Boot to work with the tulip emulation.

Fixes: 34ea023d4b95 ("net: add tulip (dec21143) driver")
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Marc-André Lureau <marcandre.lureau@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Prasad J Pandit <pjp@fedoraproject.org>
Cc: Sven Schnelle <svens@stackframe.org>
---
 hw/net/tulip.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/hw/net/tulip.c b/hw/net/tulip.c
index 1295f51d07..ffb6c2479a 100644
--- a/hw/net/tulip.c
+++ b/hw/net/tulip.c
@@ -962,6 +962,8 @@ static void pci_tulip_realize(PCIDevice *pci_dev, Error **errp)
 
     pci_conf = s->dev.config;
     pci_conf[PCI_INTERRUPT_PIN] = 1; /* interrupt pin A */
+    /* Anything with revision < 0x20 is DC21142, anything >= 0x20 is DC21143 */
+    pci_conf[PCI_REVISION_ID] = 0x20;
 
     s->eeprom = eeprom93xx_new(&pci_dev->qdev, 64);
     tulip_fill_eeprom(s);
-- 
2.25.1