From: Michael Grzeschik <m.grzeschik@pengutronix.de>
Date: Wed, 28 Jun 2017 16:32:20 +0000 (+0200)
Subject: arcnet: com20020-pci: handle backplane mode depending on card type
X-Git-Tag: v4.14-rc1~596^2~63^2~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=52ab12e4f99437a046962e6486b0efded52846af;p=platform%2Fkernel%2Flinux-rpi.git

arcnet: com20020-pci: handle backplane mode depending on card type

We read the backplane mode of each subcard from bits 2 and 3 of the misc
register.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/arcnet/com20020-pci.c b/drivers/net/arcnet/com20020-pci.c
index dec300c..f5854ab 100644
--- a/drivers/net/arcnet/com20020-pci.c
+++ b/drivers/net/arcnet/com20020-pci.c
@@ -199,6 +199,8 @@ static int com20020pci_probe(struct pci_dev *pdev,
 		lp->timeout = timeout;
 		lp->hw.owner = THIS_MODULE;
 
+		lp->backplane = (inb(priv->misc) >> (2 + i)) & 0x1;
+
 		/* Get the dev_id from the PLX rotary coder */
 		if (!strncmp(ci->name, "EAE PLX-PCI MA1", 15))
 			dev->dev_id = 0xc;