[PATCH] LLTEMAC resource end address

[Hugo Villeneuve]

Hi,
We have a design with LLTEMAC0 using channels 0 & 1, and LLTEMAC1 using channel 0. When the Linux kernel boots, we had the following error message:

---
Registering device xilinx_lltemac:0
Registering device xilinx_lltemac:1
xilinx_lltemac.1: failed to claim resource 0
cannot register dev xilinx_lltemac:1
Registering device xilinx_lltemac:2
---

We found out that the two channels of a LLTEMAC interface are each using 0x40 bytes in length, and are contiguous. The following patch took care of the problem for us (against the linux-2.6-xlnx-git tree):

---
diff --git a/arch/ppc/syslib/virtex_devices.c b/arch/ppc/syslib/virtex_devices.c
index 457e1bd..7f731e4 100644
--- a/arch/ppc/syslib/virtex_devices.c
+++ b/arch/ppc/syslib/virtex_devices.c
@@ -202,7 +202,7 @@
        .resource = (struct resource[]) { \
                { \
                        .start = XPAR_LLTEMAC_##num##_BASEADDR, \
-                       .end = XPAR_LLTEMAC_##num##_BASEADDR + 0x1000, \
+                       .end = XPAR_LLTEMAC_##num##_BASEADDR + 0x003F, \
                        .flags = IORESOURCE_MEM \
                }, \
                { \
---

Hugo V.


Hugo Villeneuve
Hardware developer | Concepteur matériel
Lyrtech
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