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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-2bacb658531sm17319194eec.18.2026.02.17.12.11.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Feb 2026 12:11:31 -0800 (PST) From: Elson Serrao To: Vinod Koul , Konrad Dybcio , Neil Armstrong , Wesley Cheng , Johan Hovold , Dmitry Baryshkov Cc: linux-arm-msm@vger.kernel.org, linux-phy@lists.infradead.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH] phy: qcom: m31-eusb2: clear PLL_EN during init Date: Tue, 17 Feb 2026 12:11:30 -0800 Message-Id: <20260217201130.2804550-1-elson.serrao@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Authority-Analysis: v=2.4 cv=Coyys34D c=1 sm=1 tr=0 ts=6994cb74 cx=c_pps a=PfFC4Oe2JQzmKTvty2cRDw==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=IkcTkHD0fZMA:10 a=HzLeVaNsDn8A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=Mpw57Om8IfrbqaoTuvik:22 a=GgsMoib0sEa3-_RKJdDe:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=49oE3CkF4HoBucdVWpUA:9 a=QEXdDO2ut3YA:10 a=6Ab_bkdmUrQuMsNx7PHu:22 X-Proofpoint-GUID: 1ll_5V1kmK82JR3DtUdQoXuWz0xc9Iaw X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjE3MDE2NSBTYWx0ZWRfXyY22A9FFnhBj e6xIL+OaT6SrPsc8KzjbYrn9XWkwgQe/VC5ON5pBfKmrIKDlGylirLlMjM3gwTpJeIMD61KNbA+ l1DESgH/8v4MrooI/rJp3YZf9BXaf5/IIl1YFXpq/Mqf0ncnEVp3SeMX/7yXf+zUG0e1y2H6mc+ OIj2h2Qc5bVfL0MZNhG39gIPTxgzvzswmmyDgoPmsd6MTjNMx4EFJZbiJHHDrvUIlP4gAxCb9F8 ozDjV5iCZyMleH7cv7a/RF+irf+iiHb1NKsl2vvdBPikp0U9pkhobGrTC4CYXcuH9lbaBb0ce8q Nbfq1fUMHc1HKGX4yGsuUXGdrBINntNthctlC5MFv4f4+f6JpuBJ7yuH7RMS8yiXVvOIS8/oic5 flVUvxhaFG4Kco6eeAM90tj59DEJVegntZrc+4HHhpSQl7B2QibUMvWmrfDSd2yyvOcAmSfTC7o RamBzYMk7CvQwtkiyRA== X-Proofpoint-ORIG-GUID: 1ll_5V1kmK82JR3DtUdQoXuWz0xc9Iaw X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-02-17_03,2026-02-16_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 lowpriorityscore=0 spamscore=0 bulkscore=0 impostorscore=0 priorityscore=1501 clxscore=1015 phishscore=0 adultscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2602170165 Content-Type: text/plain; charset="utf-8" The driver currently sets bit 0 of USB_PHY_CFG1 (PLL_EN) during PHY initialization. According to the M31 EUSB2 PHY hardware documentation, this bit is intended only for test/debug scenarios and does not control mission mode operation. Keeping PLL_EN asserted causes the PHY to draw additional current during USB bus suspend. Clearing this bit results in lower suspend power consumption without affecting normal operation. Update the driver to leave PLL_EN cleared as recommended by the hardware documentation. Fixes: 9c8504861cc4 ("phy: qcom: Add M31 based eUSB2 PHY driver") Cc: stable@vger.kernel.org Signed-off-by: Elson Serrao Reviewed-by: Konrad Dybcio --- drivers/phy/qualcomm/phy-qcom-m31-eusb2.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/phy/qualcomm/phy-qcom-m31-eusb2.c b/drivers/phy/qualco= mm/phy-qcom-m31-eusb2.c index 95cd3175926d..68f1ba8fec4a 100644 --- a/drivers/phy/qualcomm/phy-qcom-m31-eusb2.c +++ b/drivers/phy/qualcomm/phy-qcom-m31-eusb2.c @@ -83,7 +83,7 @@ static const struct m31_phy_tbl_entry m31_eusb2_setup_tbl= [] =3D { M31_EUSB_PHY_INIT_CFG(USB_PHY_CFG0, UTMI_PHY_CMN_CTRL_OVERRIDE_EN, 1), M31_EUSB_PHY_INIT_CFG(USB_PHY_UTMI_CTRL5, POR, 1), M31_EUSB_PHY_INIT_CFG(USB_PHY_HS_PHY_CTRL_COMMON0, PHY_ENABLE, 1), - M31_EUSB_PHY_INIT_CFG(USB_PHY_CFG1, PLL_EN, 1), + M31_EUSB_PHY_INIT_CFG(USB_PHY_CFG1, PLL_EN, 0), M31_EUSB_PHY_INIT_CFG(USB_PHY_FSEL_SEL, FSEL_SEL, 1), }; =20 --=20 2.34.1