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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b8fcb0ab637sm413859266b.39.2026.02.18.02.58.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 18 Feb 2026 02:58:52 -0800 (PST) Message-ID: <018f19ff-84d2-442f-8d6a-88e05d2428d8@oss.qualcomm.com> Date: Wed, 18 Feb 2026 11:58:50 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] phy: qcom: m31-eusb2: clear PLL_EN during init To: Elson Serrao , 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 References: <20260217201130.2804550-1-elson.serrao@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260217201130.2804550-1-elson.serrao@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-ORIG-GUID: ZVoM0wgNVUQbJer969Ept1qkmx6_qdOm X-Authority-Analysis: v=2.4 cv=Do5bOW/+ c=1 sm=1 tr=0 ts=69959b6e cx=c_pps a=oc9J++0uMp73DTRD5QyR2A==:117 a=FpWmc02/iXfjRdCD7H54yg==: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=Sq7H2pQaWTqN_k3XZF8A:9 a=QEXdDO2ut3YA:10 a=iYH6xdkBrDN1Jqds4HTS:22 X-Proofpoint-GUID: ZVoM0wgNVUQbJer969Ept1qkmx6_qdOm X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjE4MDA5NyBTYWx0ZWRfX0fNQh9JCmp62 /QA6z6WWEI03zZrZGTBgyifNoVGpdOiy5clG68I+hZYDV02eNMZ/SlhGmg4KouhVO97h5sLfvW2 M1V0B6Q5fVxULt8qH53oUJIVu/4t8LGE0CcdD0AEoqgeFYcMC2jFzqP884UIkN4VHo7gfsFaoWn HcNM/xdwUx0+IH+M9HZRUuhzmTjY4oOk0iVR2+BpkLrbD24+KWs1008NUiwRJaYrjMPiJxaCS33 4fZLL+3t+Sr1pS+o3459U3sKp9b20Rk1Enl8aHJPab/UXsMG9IqTQ9XvXOV3OWT9JYo86BO4adh LTPsOFnWwStJGCKCiWLtAlHW+kKNjfN/0L7qP5su8Sxf7Qi04CJFq2hpeksvsWb0hHM385VEkhl AZfGZgrC2Viuy2gpuOqTpprl4KY5y5dDOfWTJFNPgaKby9lZLqegi5cJKgO8AMcePaImHEQRInO wiKnIL1Y2KNp2vKMSAA== 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=2026-02-18_01,2026-02-16_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 impostorscore=0 phishscore=0 bulkscore=0 clxscore=1015 priorityscore=1501 adultscore=0 malwarescore=0 suspectscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2602180097 On 2/17/26 9:11 PM, Elson Serrao wrote: > 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 Konrad