linux-kernel - Re: [PATCH v2 2/2] phy: nxp-c45: add driver for tja1103

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Date:   Fri, 16 Apr 2021 00:56:26 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     "Radu Pirea (NXP OSS)" <radu-nicolae.pirea@....nxp.com>
Cc:     hkallweit1@...il.com, linux@...linux.org.uk, davem@...emloft.net,
        kuba@...nel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] phy: nxp-c45: add driver for tja1103

> +config NXP_C45_TJA11XX_PHY
> +	tristate "NXP C45 TJA11XX PHYs"
> +	help
> +	  Enable support for NXP C45 TJA11XX PHYs.
> +	  Currently supports only the TJA1103 PHY.

> +#define PHY_ID_BASE_T1			0x001BB010

It would be better to use PHY_ID_TJA_1103 here.

> +
> +#define PMAPMD_B100T1_PMAPMD_CTL		0x0834
> +#define B100T1_PMAPMD_CONFIG_EN		BIT(15)
> +#define B100T1_PMAPMD_MASTER		BIT(14)
> +#define MASTER_MODE			(B100T1_PMAPMD_CONFIG_EN | \
> +	B100T1_PMAPMD_MASTER)

You would normally align this with the B100T1_PMAPMD_CONFIG_EN

> +static int nxp_c45_reset_done(struct phy_device *phydev)
> +{
> +	return !(phy_read_mmd(phydev, MDIO_MMD_VEND1, VEND1_DEVICE_CONTROL) &
> +		DEVICE_CONTROL_RESET);
> +}
> +
> +static int nxp_c45_reset_done_or_timeout(struct phy_device *phydev,
> +					 ktime_t timeout)
> +{
> +	ktime_t cur = ktime_get();
> +
> +	return nxp_c45_reset_done(phydev) || ktime_after(cur, timeout);
> +}
> +
> +static int nxp_c45_soft_reset(struct phy_device *phydev)
> +{
> +	ktime_t timeout;
> +	int ret;
> +
> +	ret = phy_write_mmd(phydev, MDIO_MMD_VEND1, VEND1_DEVICE_CONTROL,
> +			    DEVICE_CONTROL_RESET);
> +	if (ret)
> +		return ret;
> +
> +	timeout = ktime_add_ns(ktime_get(), RESET_POLL_NS);
> +	spin_until_cond(nxp_c45_reset_done_or_timeout(phydev, timeout));

phy_read_mmd_poll_timeout() i think does what you need.

> +	if (!nxp_c45_reset_done(phydev)) {
> +		phydev_err(phydev, "reset fail\n");
> +		return -EIO;
> +	}
> +	return 0;
> +}

> +static struct phy_driver nxp_c45_driver[] = {
> +	{
> +		PHY_ID_MATCH_MODEL(PHY_ID_BASE_T1),
> +		.name			= "NXP C45 BASE-T1",

"NXP C45 TJA1103"

     Andrew