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Date: Fri, 13 May 2016 19:43:00 +0200 From: Andrew Lunn <andrew@...n.ch> To: Harini Katakam <harini.katakam@...inx.com> Cc: nicolas.ferre@...el.com, davem@...emloft.net, robh+dt@...nel.org, pawel.moll@....com, mark.rutland@....com, ijc+devicetree@...lion.org.uk, galak@...eaurora.org, harinikatakamlinux@...il.com, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, harinik@...inx.com, punnaia@...inx.com, michals@...inx.com Subject: Re: [RFC PATCH 2/2] Documentation: devictree: Add macb mdio bindings Hi Harini Is this backward compatible? Will devices using the old binding still work? /* Disable RX and TX (XXX: Should we halt the transmission * more gracefully?) */ - macb_writel(bp, NCR, 0); + ctrl = macb_readl(bp, NCR); + ctrl &= ~(MACB_BIT(RE) | MACB_BIT(TE)); + macb_writel(bp, NCR, ctrl); /* Clear the stats registers (XXX: Update stats first?) */ - macb_writel(bp, NCR, MACB_BIT(CLRSTAT)); + ctrl |= MACB_BIT(CLRSTAT); + macb_writel(bp, NCR, ctrl); /* Clear all status flags */ macb_writel(bp, TSR, -1); It is not clear to me what this part has to do with MDIO. Andrew
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