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- From 0de82310d2b32e78ff79d42c08b1122a6ede3778 Mon Sep 17 00:00:00 2001
- From: Daniel Golle <[email protected]>
- Date: Sun, 30 Apr 2023 00:15:41 +0100
- Subject: [PATCH] net: phy: realtek: detect early version of RTL8221B
- Early versions (?) of the RTL8221B PHY cannot be identified in a regular
- Clause-45 bus scan as the PHY doesn't report the implemented MMDs
- correctly but returns 0 instead.
- Implement custom identify function using the PKGID instead of iterating
- over the implemented MMDs.
- Signed-off-by: Daniel Golle <[email protected]>
- --- a/drivers/net/phy/realtek.c
- +++ b/drivers/net/phy/realtek.c
- @@ -754,6 +754,38 @@ static int rtl8226_match_phy_device(stru
- rtlgen_supports_2_5gbps(phydev);
- }
-
- +static int rtl8221b_vb_cg_match_phy_device(struct phy_device *phydev)
- +{
- + int val;
- + u32 id;
- +
- + if (phydev->drv->read_mmd) {
- + val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PKGID1);
- + if (val < 0)
- + return 0;
- +
- + id = val << 16;
- + val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PKGID2);
- + if (val < 0)
- + return 0;
- +
- + id |= val;
- + } else {
- + val = phy_read(phydev, MII_PHYSID1);
- + if (val < 0)
- + return 0;
- +
- + id = val << 16;
- + val = phy_read(phydev, MII_PHYSID2);
- + if (val < 0)
- + return 0;
- +
- + id |= val;
- + }
- +
- + return (id == 0x001cc849);
- +}
- +
- static int rtl822x_probe(struct phy_device *phydev)
- {
- struct device *dev = &phydev->mdio.dev;
- @@ -1104,7 +1136,7 @@ static struct phy_driver realtek_drvs[]
- .write_page = rtl821x_write_page,
- .soft_reset = genphy_soft_reset,
- }, {
- - PHY_ID_MATCH_EXACT(0x001cc849),
- + .match_phy_device = rtl8221b_vb_cg_match_phy_device,
- .name = "RTL8221B-VB-CG 2.5Gbps PHY",
- .get_features = rtl822x_get_features,
- .config_init = rtl8221b_config_init,
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