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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b734ff75e4fsm137001066b.12.2025.11.13.03.00.41 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 13 Nov 2025 03:00:42 -0800 (PST) Message-ID: Date: Thu, 13 Nov 2025 12:00:40 +0100 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 3/5] dt-bindings: firmware: qcom,scm: Document reboot mode To: Bjorn Andersson Cc: Loic Poulain , konradybcio@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, sre@kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-pm@vger.kernel.org References: <20251103182006.1158383-1-loic.poulain@oss.qualcomm.com> <20251103182006.1158383-4-loic.poulain@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: -8PvtlFj8uIsRJTaPIg0JRvc6qdhqwJb X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTEzMDA4MSBTYWx0ZWRfXw/zNpiNmZVkU Jdf51zPt+vMAv9psR9yFb7C9VUMmMFyX0PiPIklJPxr3lQsAdY5mEMlz6weuFx756xvKSOv9AjX D28xXPYBxcBhwONVu9GQUolmKk2rA4JhUa7swb5SiyI6Dx26XBTAb9BM09rowH4PWiRhVkzb9lA xzJluja5WACaaQcGx+yIp0u9HufDeuyBvG644bOGURzFxwirFVp6EAQoqLbMavOBy7MR9iGgOw5 Zh3Rgj9soEX2wvYDoBOQ44xULJkm/VeE2KhkS7vHQL2AzgR6LNDATLhgu9tl2s7l/Z86GsDf0wi l3YOgVqSBQJFPth0RKdTAnaiKHHbVHpP8v4hgUPTfaEs2H+ADUkVcJ7eBH3e3QrQY3DReFuUfZB /04xdieLTWuwJb44AiX1S2h5oxaaDQ== X-Authority-Analysis: v=2.4 cv=BdnVE7t2 c=1 sm=1 tr=0 ts=6915ba5e cx=c_pps a=mPf7EqFMSY9/WdsSgAYMbA==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=6UeiqGixMTsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=hsPK79fdjXi5lFZ4yDYA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=dawVfQjAaf238kedN5IG:22 X-Proofpoint-GUID: -8PvtlFj8uIsRJTaPIg0JRvc6qdhqwJb X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-13_01,2025-11-12_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 phishscore=0 bulkscore=0 priorityscore=1501 spamscore=0 lowpriorityscore=0 suspectscore=0 malwarescore=0 clxscore=1015 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510240001 definitions=main-2511130081 On 11/12/25 5:36 PM, Bjorn Andersson wrote: > On Wed, Nov 05, 2025 at 10:44:05AM +0100, Konrad Dybcio wrote: >> On 11/4/25 10:19 PM, Loic Poulain wrote: >>> On Tue, Nov 4, 2025 at 3:12 AM Bjorn Andersson wrote: >>>> >>>> On Mon, Nov 03, 2025 at 07:20:04PM +0100, Loic Poulain wrote: >>>>> SCM can be used to support reboot mode such as Emergency Recovery Mode. >>>> >>>> "such as"? Do we have any other useful bits in here? >>> >>> I heard we may have different EDL modes supported like USB or SD >>> based EDL, but I don't know much about the details. >>> >>>> >>>>> >>>>> Signed-off-by: Loic Poulain >>>>> --- >>>>> Documentation/devicetree/bindings/firmware/qcom,scm.yaml | 4 ++++ >>>>> 1 file changed, 4 insertions(+) >>>>> >>>>> diff --git a/Documentation/devicetree/bindings/firmware/qcom,scm.yaml b/Documentation/devicetree/bindings/firmware/qcom,scm.yaml >>>>> index b913192219e4..c8bb7dacd900 100644 >>>>> --- a/Documentation/devicetree/bindings/firmware/qcom,scm.yaml >>>>> +++ b/Documentation/devicetree/bindings/firmware/qcom,scm.yaml >>>>> @@ -121,6 +121,10 @@ properties: >>>>> - description: offset of the download mode control register >>>>> description: TCSR hardware block >>>>> >>>>> +patternProperties: >>>>> + "^mode-.*$": >>>> >>>> I'd only ever expect mode-edl = <1>. Do we have additional modes that >>>> warrant the generic nature of this? >>> >>> We may extend this to mode-ramdump if it makes sense, but as of now >>> it's indeed only edl, will fix it. >> >> Would adding ramdump here be a matter of: >> >> + mode-ramdump = <0xmagic> >> >> ? >> >> If so, please add it too >> > > But what does that mean? "Hey computer, perform a graceful shutdown and > when you're done, give me a ramdump"? I.. guess? Perhaps it could be useful for registering a panic handler to reboot into ramdump in case that's not enabled by deafult (but is that possible with our fw?) Konrad