[POWERPC] Spider uses low level BE MMIO accessors

We use the powerpc specific low level MMIO accessor variants instead
of readl() or readl_be() because we know spidernet is not a real PCI
device and we can thus avoid the performance hit caused by the PCI
workarounds.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 10 insertions, 8 deletions

diff --git a/drivers/net/spider_net.c b/drivers/net/spider_net.c
index cef7e6671c49..13e0a43e423b 100644
--- a/drivers/net/spider_net.c
+++ b/drivers/net/spider_net.c
@@ -88,12 +88,11 @@ MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl);
 static inline u32
 spider_net_read_reg(struct spider_net_card *card, u32 reg)
 {
-        u32 value;
-
-        value = readl(card->regs + reg);
-        value = le32_to_cpu(value);
-
-        return value;
+        /* We use the powerpc specific variants instead of readl_be() because
+         * we know spidernet is not a real PCI device and we can thus avoid the
+         * performance hit caused by the PCI workarounds.
+         */
+        return in_be32(card->regs + reg);
 }
 
 /**
@@ -105,8 +104,11 @@ spider_net_read_reg(struct spider_net_card *card, u32 reg)
 static inline void
 spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value)
 {
-        value = cpu_to_le32(value);
-        writel(value, card->regs + reg);
+        /* We use the powerpc specific variants instead of writel_be() because
+         * we know spidernet is not a real PCI device and we can thus avoid the
+         * performance hit caused by the PCI workarounds.
+         */
+        out_be32(card->regs + reg, value);
 }
 
 /** spider_net_write_phy - write to phy register