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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ae0ba7a3fcasm15026566b.117.2025.06.24.07.38.25 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 24 Jun 2025 07:38:26 -0700 (PDT) Message-ID: Date: Tue, 24 Jun 2025 16:38:24 +0200 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] arm64: dts: qcom: ipq5424: Describe the 4-wire UART SE To: Kathiravan Thirumoorthy , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20250624-ipq5424_hsuart-v2-1-6566dabfe4a6@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20250624-ipq5424_hsuart-v2-1-6566dabfe4a6@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: -ME2ZCm0VJeDe21A0kKiDIOK45GQblXN X-Proofpoint-ORIG-GUID: -ME2ZCm0VJeDe21A0kKiDIOK45GQblXN X-Authority-Analysis: v=2.4 cv=MtZS63ae c=1 sm=1 tr=0 ts=685ab864 cx=c_pps a=50t2pK5VMbmlHzFWWp8p/g==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=6IFa9wvqVegA:10 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=9lBeFAbR0IUyOWdzi5MA:9 a=QEXdDO2ut3YA:10 a=IoWCM6iH3mJn3m4BftBB:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNjI0MDEyMiBTYWx0ZWRfX7DrUd0d41f1f rHq96LKmx7kph6bfR9cm4C5sR+D5o725i7tO1yaX8noza9EIzMXfH4lWlmWmCk+1pt7yKCO4A7g 7KCcZ6VPIpH/UCdL8GYhxMxddxQJk9JRw8zOUYt0uInvRKI/rwoKEw60bJ2S7KSwiGAdhvodtGd DmHh5mQA9iop6DJNRDbR0t/E1p2lyCIhlM6S1gOSmGSNUBvldgQkRdRKRW/LSc/XHAJjaPI8sH4 qew2fEyI9m0ehsNkjcgA0HSTrTebHxo3pIqURpysN9GPWWbWstppnbKcJ1n4yNWucE1Qok6KIxo BDylQZ3hnU10hfFZ70ov1ulPL4Mvh6caEOkx3Z0JwO+MPARtRjFnQC7XlcZJblLxoQVCbMHzPol 9h50KFQB8ckEXEgXpUhr3jUUxICU0wyxEOolrLJTgf/YwMOKzBFIXxofd2/ooPnsca4XdPr9 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.7,FMLib:17.12.80.40 definitions=2025-06-24_06,2025-06-23_07,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 impostorscore=0 suspectscore=0 adultscore=0 phishscore=0 mlxlogscore=999 spamscore=0 malwarescore=0 priorityscore=1501 lowpriorityscore=0 clxscore=1015 mlxscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505280000 definitions=main-2506240122 On 6/24/25 11:00 AM, Kathiravan Thirumoorthy wrote: > QUPv3 in IPQ5424 consists of six Serial Engines (SEs). Describe the > first SE, which supports a 4-wire UART configuration suitable for > applications such as HS-UART. > > Note that the required initialization for this SE is not handled by the > bootloader. Therefore, add the SE node in the device tree but keep it > disabled. Enable it once Linux gains support for configuring the SE, > allowing to use in relevant RDPs. Do you mean fw loading support? > > Signed-off-by: Kathiravan Thirumoorthy > --- > Changes in v2: > - Correct the interrupt number > - Link to v1: https://lore.kernel.org/r/20250624-ipq5424_hsuart-v1-1-a4e71d00fc05@oss.qualcomm.com > --- > arch/arm64/boot/dts/qcom/ipq5424.dtsi | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/arch/arm64/boot/dts/qcom/ipq5424.dtsi b/arch/arm64/boot/dts/qcom/ipq5424.dtsi > index 66bd2261eb25d79051adddef604c55f5b01e6e8b..2b8499422a8a9a2f63e1af9ae8c189bafe690514 100644 > --- a/arch/arm64/boot/dts/qcom/ipq5424.dtsi > +++ b/arch/arm64/boot/dts/qcom/ipq5424.dtsi > @@ -417,6 +417,15 @@ qupv3: geniqup@1ac0000 { > #address-cells = <2>; > #size-cells = <2>; > > + uart0: serial@1a80000 { > + compatible = "qcom,geni-uart"; > + reg = <0 0x01a80000 0 0x4000>; > + clocks = <&gcc GCC_QUPV3_UART0_CLK>; > + clock-names = "se"; > + interrupts = ; > + status = "disabled"; > + }; I'd normally expect to see a pin configuration here as well, especially since you mention the bootloader doesn't configure the interface Konrad