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From: Bryan Wu <bryan.wu@analog.com>
To: jeff@garzik.org, netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, Bryan Wu <bryan.wu@analog.com>
Subject: [PATCH 2/8] [Blackfin] EMAC driver: define MDC_CLK=2.5MHz and caculate mdc_div according to SCLK.
Date: Wed, 30 Jan 2008 16:52:22 +0800	[thread overview]
Message-ID: <1201683148-23931-3-git-send-email-bryan.wu@analog.com> (raw)
In-Reply-To: <1201683148-23931-1-git-send-email-bryan.wu@analog.com>

Signed-off-by: Bryan Wu <bryan.wu@analog.com>
---
 drivers/net/bfin_mac.c |   16 ++++++++++++----
 1 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/net/bfin_mac.c b/drivers/net/bfin_mac.c
index 4006a5d..ee39819 100644
--- a/drivers/net/bfin_mac.c
+++ b/drivers/net/bfin_mac.c
@@ -412,20 +412,26 @@ static void bf537_adjust_link(struct net_device *dev)
 	spin_unlock_irqrestore(&lp->lock, flags);
 }
 
+/* MDC  = 2.5 MHz */
+#define MDC_CLK 2500000
+
 static int mii_probe(struct net_device *dev)
 {
 	struct bf537mac_local *lp = netdev_priv(dev);
 	struct phy_device *phydev = NULL;
 	unsigned short sysctl;
 	int i;
+	u32 sclk, mdc_div;
 
 	/* Enable PHY output early */
 	if (!(bfin_read_VR_CTL() & PHYCLKOE))
 		bfin_write_VR_CTL(bfin_read_VR_CTL() | PHYCLKOE);
 
-	/* MDC  = 2.5 MHz */
+	sclk = get_sclk();
+	mdc_div = ((sclk / MDC_CLK) / 2) - 1;
+
 	sysctl = bfin_read_EMAC_SYSCTL();
-	sysctl |= SET_MDCDIV(24);
+	sysctl |= SET_MDCDIV(mdc_div);
 	bfin_write_EMAC_SYSCTL(sysctl);
 
 	/* search for connect PHY device */
@@ -477,8 +483,10 @@ static int mii_probe(struct net_device *dev)
 	lp->phydev = phydev;
 
 	printk(KERN_INFO "%s: attached PHY driver [%s] "
-	       "(mii_bus:phy_addr=%s, irq=%d)\n",
-	       DRV_NAME, phydev->drv->name, phydev->dev.bus_id, phydev->irq);
+	       "(mii_bus:phy_addr=%s, irq=%d, mdc_clk=%dHz(mdc_div=%d)"
+	       "@sclk=%dMHz)\n",
+	       DRV_NAME, phydev->drv->name, phydev->dev.bus_id, phydev->irq,
+	       MDC_CLK, mdc_div, sclk/1000000);
 
 	return 0;
 }
-- 
1.5.3.4

  parent reply	other threads:[~2008-01-30  8:53 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-01-30  8:52 [PATCH 0/8] [Blackfin] EMAC driver updates Bryan Wu
2008-01-30  8:52 ` [PATCH 1/8] [Blackfin] EMAC driver: shorten the mdelay value to solve netperf performance issue Bryan Wu
2008-01-30  9:00   ` Jeff Garzik
2008-01-30  8:52 ` Bryan Wu [this message]
2008-01-30  8:52 ` [PATCH 3/8] [Blackfin] EMAC driver: bf537 MAC multicast hash filtering patch Bryan Wu
2008-01-30  8:52 ` [PATCH 4/8] [Blackfin] EMAC driver: use simpler comment headers and strip out information that is maintained in the scm's log Bryan Wu
2008-01-30  8:52 ` [PATCH 5/8] [Blackfin] EMAC driver: ADSP-BF52x arch/mach support Bryan Wu
2008-01-30  8:52 ` [PATCH 6/8] [Blackfin] EMAC driver: add power down mode Bryan Wu
2008-01-30  8:52 ` [PATCH 7/8] [Blackfin] EMAC driver: fix bug - invalidate data cache of new_skb->data range when cache is WB Bryan Wu
2008-01-30  8:52 ` [PATCH 8/8] [Blackfin] EMAC driver: Fix bug: The clock divisor is set to all ones at reset Bryan Wu

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