From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Frysinger Subject: [PATCH] netdev: bfin_mac: document TE setting in RMII modes Date: Mon, 28 Mar 2011 03:17:29 -0400 Message-ID: <1301296649-25603-1-git-send-email-vapier@gentoo.org> Cc: uclinux-dist-devel@blackfin.uclinux.org To: netdev@vger.kernel.org, "David S. Miller" Return-path: Received: from smtp.gentoo.org ([140.211.166.183]:35104 "EHLO smtp.gentoo.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751016Ab1C1IQS (ORCPT ); Mon, 28 Mar 2011 04:16:18 -0400 Sender: netdev-owner@vger.kernel.org List-ID: The current code sometimes generates build warnings due to how it checks the silicon revision, so clean it up and properly document things. Signed-off-by: Mike Frysinger --- drivers/net/bfin_mac.c | 13 ++++++++++--- 1 files changed, 10 insertions(+), 3 deletions(-) diff --git a/drivers/net/bfin_mac.c b/drivers/net/bfin_mac.c index 22abfb3..0c68816 100644 --- a/drivers/net/bfin_mac.c +++ b/drivers/net/bfin_mac.c @@ -1237,9 +1237,16 @@ static int bfin_mac_enable(struct phy_device *phydev) if (phydev->interface == PHY_INTERFACE_MODE_RMII) { opmode |= RMII; /* For Now only 100MBit are supported */ -#if (defined(CONFIG_BF537) || defined(CONFIG_BF536)) && CONFIG_BF_REV_0_2 - opmode |= TE; -#endif + if (__SILICON_REVISION__ < 3) { + /* + * This isn't publicly documented (fun times!), but in + * silicon <=0.2, the RX and TX pins are clocked together. + * So in order to recv, we must enable the transmit side + * as well. This will cause a spurious TX interrupt too, + * but we can easily consume that. + */ + opmode |= TE; + } } /* Turn on the EMAC rx */ -- 1.7.4.1