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Message-ID: <Zg1gycEDL4llYrjI@shell.armlinux.org.uk>
Date: Wed, 3 Apr 2024 14:59:37 +0100
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Gregor Herburger <gregor.herburger@...tq-group.com>
Cc: Andrew Lunn <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
Dimitri Fedrau <dima.fedrau@...il.com>,
Stefan Eichenberger <eichest@...il.com>, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org, linux@...tq-group.com,
alexander.stein@...tq-group.com
Subject: Re: [PATCH] net: phy: marvell-88q2xxx: add support for Rev B1 and B2
On Wed, Apr 03, 2024 at 03:45:22PM +0200, Gregor Herburger wrote:
> +static int mv88q222x_revb1_revb2_config_init(struct phy_device *phydev)
> +{
> + bool is_rev_b2 = phydev->c45_ids.device_ids[MDIO_MMD_PMAPMD] == PHY_ID_88Q2220_REVB2;
> + int ret, i;
> +
> + for (i = 0; i < ARRAY_SIZE(mv88q222x_revb1_init_seq0); i++) {
> + /* Rev B2 init sequence differs compared to Rev B1. As noted in Marvell API:
> + * Remove the instruction to enable TXDAC setting overwrite bit for Rev B2.
> + */
> + if (is_rev_b2 && mv88q222x_revb1_init_seq1[i].regnum == 0xffe3)
> + continue;
> +
> + ret = phy_write_mmd(phydev, mv88q222x_revb1_init_seq0[i].devad,
> + mv88q222x_revb1_init_seq0[i].regnum,
> + mv88q222x_revb1_init_seq0[i].val);
> + if (ret < 0)
> + return ret;
> + }
> +
> + usleep_range(3000, 5000);
> +
> + for (i = 0; i < ARRAY_SIZE(mv88q222x_revb1_init_seq1); i++) {
> + ret = phy_write_mmd(phydev, mv88q222x_revb1_init_seq1[i].devad,
> + mv88q222x_revb1_init_seq1[i].regnum,
> + mv88q222x_revb1_init_seq1[i].val);
> + if (ret < 0)
> + return ret;
> + }
I think a helper would be useful to write these sequences, rather than
writing the same code several times:
static int mv88q2xxx_write_mmd_vals(struct phy_device *phydev,
const struct mmd_val *vals, size_t len)
{
int ret;
for (; len; vals++, len--) {
ret = phy_write_mmd(phydev, vals->devad, vals->regnum,
vals->val);
if (ret < 0)
return ret;
}
return 0;
}
--
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