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Wed, 29 Apr 2026 09:10:45 -0700 (PDT) X-Received: by 2002:a17:902:cf0b:b0:2b2:3eec:c75b with SMTP id d9443c01a7336-2b988368538mr33083725ad.2.1777479044502; Wed, 29 Apr 2026 09:10:44 -0700 (PDT) Received: from [192.168.29.31] ([49.43.226.7]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2b99852135asm7875085ad.73.2026.04.29.09.10.34 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 29 Apr 2026 09:10:44 -0700 (PDT) Message-ID: <37ab0178-1c9d-409e-bbaa-832f8075afa4@oss.qualcomm.com> Date: Wed, 29 Apr 2026 21:40:32 +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 v21 08/13] mfd: core: Add firmware-node support to MFD cells To: Bartosz Golaszewski Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, Florian Fainelli , Krzysztof Kozlowski , Dmitry Baryshkov , Mukesh Ojha , Andre Draszik , Greg Kroah-Hartman , Kathiravan Thirumoorthy , Srinivas Kandagatla , Sebastian Reichel , Mark Rutland , Lorenzo Pieralisi , "Rafael J. Wysocki" , Daniel Lezcano , Christian Loehle , Ulf Hansson , Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , Konrad Dybcio , Arnd Bergmann , Souvik Chakravarty , Andy Yan , Matthias Brugger , John Stultz , Moritz Fischer , Sudeep Holla References: <20260427-arm-psci-system_reset2-vendor-reboots-v21-0-dcf937775e73@oss.qualcomm.com> <20260427-arm-psci-system_reset2-vendor-reboots-v21-8-dcf937775e73@oss.qualcomm.com> Content-Language: en-US From: Shivendra Pratap In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Proofpoint-GUID: LqZL1TiPuIXt4Vo6Zocg75tQOpIg55Xt X-Proofpoint-ORIG-GUID: LqZL1TiPuIXt4Vo6Zocg75tQOpIg55Xt X-Authority-Analysis: v=2.4 cv=TvHWQjXh c=1 sm=1 tr=0 ts=69f22d85 cx=c_pps a=MTSHoo12Qbhz2p7MsH1ifg==:117 a=Y3Rdv8TwbQrKP7QTPRCa6w==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_K5XuSEh1TEqbUxoQ0s3:22 a=EUspDBNiAAAA:8 a=KxIdvRQG5D7s9ip59WoA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=GvdueXVYPmCkWapjIL-Q:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDI5MDE2MyBTYWx0ZWRfX3VPwO8Z+g80Y 4LzYoCprUvKyzr9X6jfr7kHJUpaYq9WHIyesvSOTr4Bz3dwVNTTlznAUMna0F9I4f1C26MdUFLd t7XM1usIDutht9BZAhQ1tm/qIxOr6ufaMXQX8CDsJf5bHF438gJHozFPt5CriCdBcVG604peCIK qOdPBSVJ+EgKVppyrjBdGMiJyLoK0L4G30uP4tjDiEKdKN1p8zesIZYjOn1zydfx0vAtaRoYtXg u7CrTQBo/tMSSEWpW4jVGDYrE0MmhiTCyCHwpLalRRx9+NMhHje1wLD2QVDO17U3kAKYMkNa9zG zMEt0JNTUL31DjWX9SKNAqa0Wnb99PjpNk9D21c+5ZeQpoT+/LE3aBp1lfuXk7WkZj1pkPd+YEd DkQWGG4Gqr6rCoCc3ZM1N05qStTLg4169ENEq6nLbqPSBm+Vss5Z68FADeneU7rvccf0omnQJtB reP1IrU0UySsNu++jVA== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-29_01,2026-04-28_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 adultscore=0 clxscore=1015 priorityscore=1501 impostorscore=0 phishscore=0 suspectscore=0 spamscore=0 lowpriorityscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2604290163 On 29-04-2026 15:20, Bartosz Golaszewski wrote: > On Wed, Apr 29, 2026 at 11:46 AM Shivendra Pratap > wrote: >> >>>> >>>> If set, it would be called from MFD core and would do the name lookup >>>> and return the fwnode which would then be assigned to the cell device? >>> >> >> Or should we just drop this patch for fwnode in mfd-core? >> >> Export a new call in reboot-mode framework as: >> reboot_mode_register_node(struct reboot_mode_driver *reboot, >> struct device_node *np / fwnode) >> >> Use the parent node in psci-reboot-mode and find reboot-mode and call >> reboot_mode_register_node? >> > > No, I think the reboot-mode device (as pointed to by the dev field of > struct reboot_mode_driver) should be associated with the right fwnode > from the start so it should be handled in MFD core. Ack. something like should be fine? drivers/mfd/mfd-core.c : + if (!pdev->dev.fwnode && cell->get_fwnode) { + fwnode = cell->get_fwnode(parent); + if (fwnode) + device_set_node(&pdev->dev, fwnode); + } drivers/mfd/psci-mfd.c (goes next patch): +static struct fwnode_handle *psci_reboot_mode_get_fwnode(struct device *parent) +{ + return fwnode_get_named_child_node(dev_fwnode(parent), "reboot-mode"); +} -- thanks, Shivendra