From: Armando Visconti <armando.visconti@st.com>
Date: Mon, 26 Mar 2012 00:09:55 +0000 (+0000)
Subject: net/designware: Consecutive writes must have delay
X-Git-Tag: v2012.04-rc2~8^2~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=aa51005c3f7e517164fa000d68672041f6c4191f;p=kernel%2Fu-boot.git

net/designware: Consecutive writes must have delay

This patch solves a TX/RX problem which happens at 10Mbps, due to the
fact that we are not respecting 4 cyles of the phy_clk (2.5MHz) between
two consecutive writes on the same register.

Signed-off-by: Armando Visconti <armando.visconti@st.com>
Signed-off-by: Amit Virdi <amit.virdi@st.com>
---

diff --git a/drivers/net/designware.c b/drivers/net/designware.c
index fc14b70..933032c 100644
--- a/drivers/net/designware.c
+++ b/drivers/net/designware.c
@@ -175,8 +175,7 @@ static int dw_eth_init(struct eth_device *dev, bd_t *bis)
 	writel(readl(&dma_p->opmode) | RXSTART, &dma_p->opmode);
 	writel(readl(&dma_p->opmode) | TXSTART, &dma_p->opmode);
 
-	writel(readl(&mac_p->conf) | RXENABLE, &mac_p->conf);
-	writel(readl(&mac_p->conf) | TXENABLE, &mac_p->conf);
+	writel(readl(&mac_p->conf) | RXENABLE | TXENABLE, &mac_p->conf);
 
 	return 0;
 }