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Thu, 15 Oct 2026 02:14:39 -0700 (PDT) X-Received: by 2002:a05:620a:27d6:b0:92e:6485:f640 with SMTP id af79cd13be357-93ebd224118mr3283601285a.4.1792055678894; Thu, 15 Oct 2026 02:14:38 -0700 (PDT) Received: from [192.168.226.26] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c3edab11d7bsm101640266b.83.2026.10.15.02.14.35 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 15 Oct 2026 02:14:37 -0700 (PDT) Message-ID: <8c375f13-ecd2-4ceb-8bc8-949a90f971fc@oss.qualcomm.com> Date: Thu, 15 Oct 2026 11:14:34 +0200 Precedence: bulk X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 3/9] dt-bindings: regulator: add Qualcomm LCDB regulator To: Dmitry Baryshkov , Lee Jones , Daniel Thompson , Jingoo Han , Helge Deller , Kiran Gunda , Subbaraman Narayanamurthy , Liam Girdwood , Mark Brown , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Stephen Boyd , Bjorn Andersson , Konrad Dybcio , Abel Vesa , Dmitry Baryshkov Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, mfd@lists.linux.dev References: <20261015-sm8150-display-card-v1-0-5c14928cef29@oss.qualcomm.com> <20261015-sm8150-display-card-v1-3-5c14928cef29@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20261015-sm8150-display-card-v1-3-5c14928cef29@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: uXeohvKhRKtC6Nz_0dQFYxmqrPyIkoHY X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDE1MDAzNiBTYWx0ZWRfX2GvA2jjUaRdr zJipApUuhihr7MBU03iMwyLV4YycIsfN/VqPtXkVaa6oNe12LI1M1YXM+5e9av9ytbtVL+zpbJ2 q9NtybKZYbzv3dahckoFQjRJqEJwWLJnFEDAWtuA96OFpY3oifQq6+u2VBO6wfzGfg54Iohjprx lzXJm0UxBKR75kBQS6CE8hiwc7uWhl9dhaGEJ+6MqyAnz6ww/VBGAYR9urIVTDjnI7keQ+dJZ44 jZQibivV+edbuYjdJ8lEYeI/zEyQ7xKu1puI8EBFTllxM25g21HOnlh+Z7+K5/szV3sZi2a45Xm Hz2LLpZvMpBh1ZOO45k0bTAsvorRADbRqx6UlM/sxhLdfFos2LpWqf5IA72zPXkaScBfT55L1Co FALAYF5kDj7GE5yiBYYgdwM6OrX/GD2S7l+m2Vs8isbiRg6Gspix15Ef0+jPGXDxAbRTLVmU1/y Km8GjP3qYXuaWGCIQtA== X-Proofpoint-Spam-Info: AW1haW4tMjYxMDE1MDAzNiBTYWx0ZWRfX1LofbElDhcO8 oTaf8Wdly221uYZyeLqljUN8XAZaOVr0gx6mwPnlg5+azN4/Z7AqdlZ+81sVDkHexwgJ6/uBZI8 8cNEEjpJgoqWAlI8KB1+xfrMkhDNcpE= X-Authority-Analysis: v=2.4 cv=Eb5d0/mC c=1 sm=1 tr=0 ts=6ad09980 cx=c_pps a=EVbN6Ke/fEF3bsl7X48z0g==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yOCtJkima9RkubShWh1s:22 a=EUspDBNiAAAA:8 a=OJYj8EsONSIZtexx7k8A:9 a=QEXdDO2ut3YA:10 a=a_PwQJl-kcHnX1M80qC6:22 X-Proofpoint-ORIG-GUID: uXeohvKhRKtC6Nz_0dQFYxmqrPyIkoHY X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-10-13_01,2026-10-14_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 impostorscore=0 phishscore=0 bulkscore=0 priorityscore=1501 clxscore=1015 lowpriorityscore=0 adultscore=0 malwarescore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610080000 definitions=main-2610150036 On 10/15/26 10:58 AM, Dmitry Baryshkov wrote: > Several Qualcomm PMICs have an LCDB block providing the positive and > negative bias rails for LCD panels. It is not supported by Linux, so > boards using it either model the rails as dummy fixed regulators and > depend on the state left by the bootloader. > > Describe the LCDB regulator present on the PM8150L. Use it as a fallback > compatible for LCDB blocks on PMI632 and PM6150L. PM660L has a different > version of LCDB block, so it's not being covered. > > Assisted-by: LLM > Signed-off-by: Dmitry Baryshkov > --- [...] > + lcdb@ec00 { > + compatible = "qcom,pm8150l-lcdb"; > + reg = <0xec00>; > + interrupts = <0x5 0xec 0x1 IRQ_TYPE_EDGE_RISING>; > + > + ldo { > + regulator-min-microvolt = <4000000>; > + regulator-max-microvolt = <6000000>; > + }; > + > + ncp { > + regulator-min-microvolt = <4000000>; > + regulator-max-microvolt = <6000000>; > + }; Let's tighten up the example to some specific voltage to reduce room for poor copypastas Konrad