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Thu, 26 Feb 2026 23:23:25 -0800 (PST) X-Received: by 2002:a17:90a:da88:b0:356:46ad:a161 with SMTP id 98e67ed59e1d1-35965ca1bd2mr1306054a91.4.1772177005508; Thu, 26 Feb 2026 23:23:25 -0800 (PST) Received: from [10.218.41.33] ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3591345b158sm4061973a91.1.2026.02.26.23.23.21 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 26 Feb 2026 23:23:25 -0800 (PST) Message-ID: Date: Fri, 27 Feb 2026 12:53:19 +0530 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 v2 1/1] arm64: dts: qcom: monaco-evk: Add Interface Plus Mezzanine To: Dmitry Baryshkov Cc: andersson@kernel.org, konradybcio@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, richardcochran@gmail.com, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, mohd.anwar@oss.qualcomm.com, krishna.chundru@oss.qualcomm.com, monish.chunara@oss.qualcomm.com References: <20260222173545.3627478-1-umang.chheda@oss.qualcomm.com> <20260222173545.3627478-2-umang.chheda@oss.qualcomm.com> <4ae0dd46-5f5f-403b-bbc6-1094159be302@oss.qualcomm.com> Content-Language: en-US From: Umang Chheda In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-GUID: hdJNJibegRRuEnBhF6owpiM9HNK2vBQ5 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjI3MDA2MSBTYWx0ZWRfX0xGd2k1GpLZP x8PioSHoQp1l0tg12j7UMor5kSbInQiP2YUgnJAw5VmTuG3xl8kSdUwySRnDjLefvgFeCrvDZ95 BrmmhC1z1TpRTXFSyAZMjm6hsRobcmfaXR0kDIBq9bSWv5MeiKkKRchfMNU7EjA7U4eMiN38M9X rQyZJIBhDGsWKzFzUvx/MJpCuzo7qso2P+9awnDB4e8667NK5ih8cz/gYpfPkuh8S4hVGzzg/TH xFQcqfYQK3DMGZp64UZMGlKnAt9cxWuDt1qrBNiyy1cAfMLgoqj/x2Bn0PGs7sOZPoyvVnBvYD9 1pb7sgriKAzy8EGOMkNILWBay08Kegyy6OFfY22gKsd87au295QSCbtlb5YDGXXFRlEdwKq1fvk A15wWcpBqIbka48Cd4+TYOZrw5w292Pd1c5uL4EK3mqHAeAcqabAfxaIpU2a6CqbQon6rFMfhQh gWRmD/xdJep37+OvrsA== X-Authority-Analysis: v=2.4 cv=daaNHHXe c=1 sm=1 tr=0 ts=69a1466f cx=c_pps a=RP+M6JBNLl+fLTcSJhASfg==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=IkcTkHD0fZMA:10 a=HzLeVaNsDn8A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=gowsoOTTUOVcmtlkKump:22 a=kQJZIT5M89cdE685t2YA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=iS9zxrgQBfv6-_F4QbHw:22 X-Proofpoint-ORIG-GUID: hdJNJibegRRuEnBhF6owpiM9HNK2vBQ5 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=2026-02-27_01,2026-02-26_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 lowpriorityscore=0 phishscore=0 bulkscore=0 adultscore=0 priorityscore=1501 spamscore=0 clxscore=1015 impostorscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2602270061 On 2/24/2026 12:26 AM, Dmitry Baryshkov wrote: > On Mon, Feb 23, 2026 at 03:17:11PM +0530, Umang Chheda wrote: >> Hello Dmitry, >> >> On 2/22/2026 11:57 PM, Dmitry Baryshkov wrote: >>> On Sun, Feb 22, 2026 at 11:05:45PM +0530, Umang Chheda wrote: >>>> The Interface Plus [IFP] Mezzanine is an hardware expansion add-on >>>> board designed to be stacked on top of Monaco EVK. >>>> >>>> It has following peripherals : >>>> >>>> - 4x Type A USB ports in host mode. >>>> - TC9563 PCIe switch, which has following three downstream ports (DSP) : >>>> - 1st DSP connects M.2 E-key connector for connecting WLAN endpoints. >>> Nit: routed to? Is that M.2 only suitable for WLANs? What is "WLAN >>> endpoints"? >>> routed to? >> If I understand correctly - you mean change string "connects M.2 E-Key connector" to >> "routed to M.2 E-Key connector" ? >>   >> >>> Is that M.2 only suitable for WLANs? >> Yes, this is suitable only for the WLAN module. >> >>> What is "WLAN endpoints"? >> I Agree this is misleading - will change this to "WLAN module" >> >>>> - 2nd DSP connects M.2 B-key connector for connecting cellular >>>> modems. >>>> - 3rd DSP with support for Dual Ethernet ports. >>>> - EEPROM. >>>> - LVDS Display. >>>> - 2*mini DP. >>>> >>>> Add support for following peripherals : >>>> - TC9563 PCIe Switch. >>>> - EEPROM. >>> If there is an onboard USB hub, please describe it here. Also, what is >>> the story of mini DP ports? If they are to be enabled later, please >>> mention, why. >>>  If there is an onboard USB hub, please describe it here. >> Ack, Since there are no DT changes required to enable USB Hub I did not mention. >> >> will mention it here in the next patch. > That's not what I meant. Please describe the USB hub in DT. The dependent changes for enabling USB hub on monaco-evk are In-progress and not yet upstreamed will post the patch to enable USB hub for IFP-mezzanine once it is upstreamed for monaco-evk core-kit. I will update the commit text of this patch to indicate the same. > >>>> + >>>> + vreg_0p9: regulator-vreg-0p9 { >>> Are all these regulators a part of the mezzanine? >> Yes, all these regulators are part of mezzanine board. >>>> + compatible = "regulator-fixed"; >>>> + regulator-name = "VREG_0P9"; >>>> + >>>> + regulator-min-microvolt = <900000>; >>>> + regulator-max-microvolt = <900000>; >>>> + regulator-always-on; >>>> + regulator-boot-on; >>>> + >>>> + vin-supply = <&vreg_3p3>; >>>> + }; >>>> + >>>> + vreg_1p8: regulator-vreg-1p8 { >>>> + compatible = "regulator-fixed"; >>>> + regulator-name = "VREG_1P8"; >>>> + >>>> + regulator-min-microvolt = <1800000>; >>>> + regulator-max-microvolt = <1800000>; >>>> + regulator-always-on; >>>> + regulator-boot-on; >>>> + >>>> + vin-supply = <&vreg_4p2>; >>>> + }; >>>> + >>>> + vreg_3p3: regulator-vreg-3p3 { >>>> + compatible = "regulator-fixed"; >>>> + regulator-name = "VREG_3P3"; >>>> + >>>> + regulator-min-microvolt = <3300000>; >>>> + regulator-max-microvolt = <3300000>; >>>> + regulator-always-on; >>>> + regulator-boot-on; >>>> + >>>> + vin-supply = <&vreg_4p2>; >>>> + }; >>>> + >>>> + vreg_4p2: regulator-vreg-4p2 { >>>> + compatible = "regulator-fixed"; >>>> + regulator-name = "VREG_4P2"; >>>> + >>>> + regulator-min-microvolt = <4200000>; >>>> + regulator-max-microvolt = <4200000>; >>>> + regulator-always-on; >>>> + regulator-boot-on; >>>> + >>>> + vin-supply = <&vreg_sys_pwr>; >>>> + }; >>>> + >>>> + vreg_sys_pwr: regulator-vreg-sys-pwr { >>>> + compatible = "regulator-fixed"; >>>> + regulator-name = "VREG_SYS_PWR"; >>>> + >>>> + regulator-min-microvolt = <24000000>; >>>> + regulator-max-microvolt = <24000000>; >>>> + regulator-always-on; >>>> + regulator-boot-on; >>> ... supplied from what? >> This regulator is supplied directly from the DC Power adapter. > Is there a physical regulator which outputs to VREG_SYS_PWR? Is it a > part of the mezzanine? Basically - we have added  VREG_SYS_PWR to describe the DC power input. This is nothing but the direct 24V DC Power Input and have added this as parent for "vreg_4p2" power supply. > >>>> + >>>> +&tlmm { >>>> + tc9563_resx_n: tc9563-resx-state { >>>> + pins = "gpio124"; >>>> + function = "gpio"; >>>> + bias-disable; >>>> + output-high; > Please add a comment, why is it out high. Ack > >>>> + }; >>>> +}; >>>> -- >>>> 2.34.1 >> Thanks, >> Umang Thanks, Umang