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Date: Mon, 20 May 2019 09:05:26 +0200 From: Oleksij Rempel <o.rempel@...gutronix.de> To: Andrew Lunn <andrew@...n.ch> Cc: Paul Burton <paul.burton@...s.com>, Ralf Baechle <ralf@...ux-mips.org>, James Hogan <jhogan@...nel.org>, Rob Herring <robh+dt@...nel.org>, Jay Cliburn <jcliburn@...il.com>, Chris Snook <chris.snook@...il.com>, "David S. Miller" <davem@...emloft.net>, Mark Rutland <mark.rutland@....com>, Pengutronix Kernel Team <kernel@...gutronix.de>, linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, John Crispin <john@...ozen.org>, Felix Fietkau <nbd@....name>, netdev@...r.kernel.org, Chuanhong Guo <gch981213@...il.com>, info@...ifunk-bad-gandersheim.net Subject: Re: [PATCH v4 3/3] net: ethernet: add ag71xx driver On 20.05.19 02:33, Andrew Lunn wrote: > Hi Oleksij > >> +static int ag71xx_mdio_mii_read(struct mii_bus *bus, int addr, int reg) >> +{ >> + struct ag71xx *ag = bus->priv; >> + struct net_device *ndev = ag->ndev; >> + int err; >> + int ret; >> + >> + err = ag71xx_mdio_wait_busy(ag); >> + if (err) >> + return err; >> + >> + ag71xx_wr(ag, AG71XX_REG_MII_CMD, MII_CMD_WRITE); > > It looks like you have not removed this. done. > >> + ag71xx_wr(ag, AG71XX_REG_MII_ADDR, >> + ((addr & 0xff) << MII_ADDR_SHIFT) | (reg & 0xff)); >> + ag71xx_wr(ag, AG71XX_REG_MII_CMD, MII_CMD_READ); >> + >> + err = ag71xx_mdio_wait_busy(ag); >> + if (err) >> + return err; >> + >> + ret = ag71xx_rr(ag, AG71XX_REG_MII_STATUS); >> + /* >> + * ar9331 doc: bits 31:16 are reserved and must be must be written >> + * with zero. >> + */ >> + ret &= 0xffff; >> + ag71xx_wr(ag, AG71XX_REG_MII_CMD, MII_CMD_WRITE); > > Or this. this one is needed. MII_CMD_WRITE is a wrong name, it is actually disabling MII_CMD_READ mode. > >> + >> + netif_dbg(ag, link, ndev, "mii_read: addr=%04x, reg=%04x, value=%04x\n", >> + addr, reg, ret); >> + >> + return ret; >> +} >> + >> +static int ag71xx_mdio_mii_write(struct mii_bus *bus, int addr, int reg, >> + u16 val) >> +{ >> + struct ag71xx *ag = bus->priv; >> + struct net_device *ndev = ag->ndev; >> + >> + netif_dbg(ag, link, ndev, "mii_write: addr=%04x, reg=%04x, value=%04x\n", >> + addr, reg, val); >> + >> + ag71xx_wr(ag, AG71XX_REG_MII_ADDR, >> + ((addr & 0xff) << MII_ADDR_SHIFT) | (reg & 0xff)); > > addr have the vale 0-31. So a mask of 0xff is a couple of bits too > big. done > >> + ag71xx_wr(ag, AG71XX_REG_MII_CTRL, val); >> + >> + return ag71xx_mdio_wait_busy(ag); >> +} > >> +static void ag71xx_link_adjust(struct ag71xx *ag, bool update) >> +{ >> + struct net_device *ndev = ag->ndev; >> + struct phy_device *phydev = ndev->phydev; >> + u32 cfg2; >> + u32 ifctl; >> + u32 fifo5; >> + >> + if (!phydev->link && update) { >> + ag71xx_hw_stop(ag); >> + netif_carrier_off(ag->ndev); > > phylib will take care of the carrier for you. done > Andrew thx! Kind regards, Oleksij Rempel -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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