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a=qoll8+KPOyaMroiJ2sR5sw==:17 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=z/mQ4Ysz8XfWz/Q5cLBRGdckG28=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=wP3pNCr1ah4A:10 a=GoEa3M9JfhUA:10 a=VkNPw1HP01LnGYTKEx00:22 a=aRxQL1JOAAAA:8 a=1AmAjypbCYY3lO0qBD8A:9 a=QEXdDO2ut3YA:10 a=lBRdisTmIr2YKkuu8atg:22 cc=ntf awl=host:12110 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMjE2MDE0NiBTYWx0ZWRfXxYrrXM9BmwIj hEfhgcBjBS37H/WDjCNngIL80wI/RD/XDRP6brGVtk2m8VwMKev6SJPLw/Eam29v1Nym7DXo28B qclMrP5umI+iu7kqvkdSzvE+UxiBWgPSv8E5zBY5NykikwMWkGITNuVqwEAdkRvR52xwTTjJvlb 8gNIpdB4TVPgthO6KTkqSWY1AKKPo6SqJIch0++6VV0d4TNBc32YKamQm0VoCNfmNivguYv+jPk 300d4F4AVy1iE9RamYjfSBWlHBpad3ARo7WAawWT5T0M+94seYXgLHB0lrMqngVi10uKBApL25/ kvtUIQ7woHRiRmp2tti/LBzngl00MQbPB9WnV9iyNLwfma3g8+Fv9sbev5S3U12BSq22oNE1i6R x8VAERIaXLmUzEM+u0pb9aCogAvFEZK4hR6C73R6nlE6p0NMd2c= On 12/16/2025 9:18 PM, Osose Itua wrote: > From 9c68d9082a9c0550891f24c5902c1f0de15de949 Mon Sep 17 00:00:00 2001 > From: Osose Itua > Date: Fri, 14 Nov 2025 17:00:14 -0500 > Subject: [PATCH 1/2] net: phy: adin: enable configuration of the LP > Termination Register Double space between LP Termination. > > The ADIN1200/ADIN1300 provide a control bit that selects between normal > receive termination and the lowest common mode impedance for 100BASE-TX > operation. This behavior is controlled through the Low Power Termination > register (B_100_ZPTM_EN_DIMRX). > > Bit 0 of this register enables normal termination when set (this is the > default), and selects the lowest common mode impedance when cleared. > > Signed-off-by: Osose Itua > --- > drivers/net/phy/adin.c | 32 ++++++++++++++++++++++++++++++++ > 1 file changed, 32 insertions(+) > > diff --git a/drivers/net/phy/adin.c b/drivers/net/phy/adin.c > index 7fa713ca8d45..2969480a7be3 100644 > --- a/drivers/net/phy/adin.c > +++ b/drivers/net/phy/adin.c > @@ -89,6 +89,9 @@ > #define ADIN1300_CLOCK_STOP_REG 0x9400 > #define ADIN1300_LPI_WAKE_ERR_CNT_REG 0xa000 > > +#define ADIN1300_B_100_ZPTM_DIMRX 0xB685 > +#define ADIN1300_B_100_ZPTM_EN_DIMRX BIT(0) > + > #define ADIN1300_CDIAG_RUN 0xba1b > #define ADIN1300_CDIAG_RUN_EN BIT(0) > > @@ -522,6 +525,31 @@ static int adin_config_clk_out(struct phy_device *phydev) > ADIN1300_GE_CLK_CFG_MASK, sel); > } > > +static int adin_config_zptm100(struct phy_device *phydev) > +{ > + struct device *dev = &phydev->mdio.dev; > + u8 reg; > + int rc; > + > + if (!(device_property_read_bool(dev, "adi,low-cmode-impedance"))) > + return 0; > + > + /* set to 0 to configure for lowest common-mode impedance */ > + rc = phy_write_mmd(phydev, MDIO_MMD_VEND1, ADIN1300_B_100_ZPTM_DIMRX, 0x0); > + if (rc < 0) > + return rc; > + > + reg = phy_read_mmd(phydev, MDIO_MMD_VEND1, ADIN1300_B_100_ZPTM_DIMRX); phy_read_mmd return int, but u8 reg reg < 0 will never be true > + if (reg < 0) > + return reg; > + > + if (reg != 0x0) > + phydev_err(phydev, > + "Lowest common-mode impedance configuration failed\n"); > + > + return 0; > +} > + > static int adin_config_init(struct phy_device *phydev) > { > int rc; > @@ -548,6 +576,10 @@ static int adin_config_init(struct phy_device *phydev) > if (rc < 0) > return rc; > > + rc = adin_config_zptm100(phydev); > + if (rc < 0) > + return rc; > + > phydev_dbg(phydev, "PHY is using mode '%s'\n", > phy_modes(phydev->interface)); > >