[U-Boot] [PATCH 1/1] net: lpc32xx: improve download rate in RMII phy mode

[LEMIEUX, SYLVAIN]

This is a minor update to LPC32xx MAC driver patch that add support for the RMII phy mode.

In the legacy BSP from NXP, in RMII phy mode, an extra 10ms delay was present after the release of the soft reset.

In my tests (connected using RMII phy mode to a Micrel KSZ8031RNL), the download rate was 20% to 25% slower if the extra 10ms delay was not present.

This patch actually requires four other lpc32xx patches that are not yet available in u-boot/master or u-boot-arm/master:
1) http://patchwork.ozlabs.org/patch/489100/
2) http://patchwork.ozlabs.org/patch/489190/
3) http://patchwork.ozlabs.org/patch/491419/
4) http://patchwork.ozlabs.org/patch/491420/

Signed-off-by: Sylvain Lemieux <slemieux at tycoint.com>
---
 drivers/net/lpc32xx_eth.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/lpc32xx_eth.c b/drivers/net/lpc32xx_eth.c
index bb8d1ec..207d721 100644
--- a/drivers/net/lpc32xx_eth.c
+++ b/drivers/net/lpc32xx_eth.c
@@ -634,6 +634,8 @@ int lpc32xx_eth_initialize(bd_t *bis)

        /* Release SOFT reset to let MII talk to PHY */
        clrbits_le32(&regs->mac1, MAC1_SOFT_RESET);
+       if (lpc32xx_eth.phy_rmii)
+               udelay(10000);

        /* register driver before talking to phy */
        eth_register(dev);
--
1.7.12.4


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