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Message-ID: <1576086486.23763.61.camel@mtksdccf07> Date: Thu, 12 Dec 2019 01:48:06 +0800 From: Landen Chao <landen.chao@...iatek.com> To: Andrew Lunn <andrew@...n.ch> CC: "f.fainelli@...il.com" <f.fainelli@...il.com>, "vivien.didelot@...oirfairelinux.com" <vivien.didelot@...oirfairelinux.com>, "matthias.bgg@...il.com" <matthias.bgg@...il.com>, "robh+dt@...nel.org" <robh+dt@...nel.org>, "mark.rutland@....com" <mark.rutland@....com>, "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-mediatek@...ts.infradead.org" <linux-mediatek@...ts.infradead.org>, "davem@...emloft.net" <davem@...emloft.net>, Sean Wang <Sean.Wang@...iatek.com>, "opensource@...rst.com" <opensource@...rst.com>, "frank-w@...lic-files.de" <frank-w@...lic-files.de> Subject: Re: [PATCH net-next 4/6] net: dsa: mt7530: Add the support of MT7531 switch On Wed, 2019-12-11 at 00:48 +0800, Andrew Lunn wrote: > > +static int mt7531_setup(struct dsa_switch *ds) > > +{ > > + /* Enable PHY power, since phy_device has not yet been created > > + * provided for phy_[read,write]_mmd_indirect is called, we provide > > + * our own mt7531_ind_mmd_phy_[read,write] to complete this > > + * function. > > + */ > > + val = mt7531_ind_mmd_phy_read(priv, 0, PHY_DEV1F, > > + MT7531_PHY_DEV1F_REG_403); > > + val |= MT7531_PHY_EN_BYPASS_MODE; > > + val &= ~MT7531_PHY_POWER_OFF; > > + mt7531_ind_mmd_phy_write(priv, 0, PHY_DEV1F, > > + MT7531_PHY_DEV1F_REG_403, val); > > + > > Is this power to all the PHYs? Or just one? This is an internal circuit that controls the power to all PHYs before Generic MII registers are available. Landen > > Andrew
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