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[130.180.211.218]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4995427a4dcsm113421675e9.11.2026.08.06.19.34.13 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 06 Aug 2026 19:34:21 -0700 (PDT) Message-ID: <64e146aa-4907-495d-b394-7cecb1727816@oss.qualcomm.com> Date: Fri, 7 Aug 2026 04:34:11 +0200 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v9 4/6] thermal: khadas-mcu-fan: Add fan config from platform data Add regulator support To: linux-kernel-dev@aliel.fr, Neil Armstrong , Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Andi Shyti , Kevin Hilman , Jerome Brunet , Martin Blumenstingl , Beniamino Galvani , "Rafael J. Wysocki" , Daniel Lezcano , Zhang Rui , Lukasz Luba , Liam Girdwood , Mark Brown Cc: linux-amlogic@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org, mfd@lists.linux.dev References: <20260805-add-mcu-fan-khadas-vim4-v9-0-75df78710b9e@aliel.fr> <20260805-add-mcu-fan-khadas-vim4-v9-4-75df78710b9e@aliel.fr> Content-Language: en-US From: Daniel Lezcano In-Reply-To: <20260805-add-mcu-fan-khadas-vim4-v9-4-75df78710b9e@aliel.fr> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: DtINX2XRDcvrGwAkAdlHpEbc4-h4c5mX X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODA3MDAxNSBTYWx0ZWRfXy7GS7BbI/Kwh X5Bzequ5aKsEynOhHGl2RygBipbifylr1bZyYuvvofaHOUMXDVJR4/o7DXdmsv56FGQeiLdS6LL L7hgOYtM3tLvcqaQyfnbF7SpsHrSjNr58NXFhdgFTj7u6laJSs7TXfG1kwux7eso8/HcrVAIGnv jCkQmpbr8tFs5nEbs1itonEfO518n2HmFXYcpoZ5zpPV0rm22mfi7DzgYZki8pD7tj+TPA02u8Z C1X9fk9yR0KaqcUdfvAwyYV+RUZ0Oi3p0jxnpr1D0crM5Ctp3YpZQGt3jgEIzLOSspxm7wA+l5n qKQmc4+K/Jo816Dp+o2QD7SqEwDkzmCBvM40FfRnsV5iI6KimBiscNhxTsOy/Nnw6CtB/IU6SyH FKuDhgunOCvHPmPlfZx1yLLnYVBy4H1kgKsYJecLacHNt1fGVhSZtf0PObWMhDJQaam5H2+SKqc mfVGAbX1/IsLo9chPGA== X-Proofpoint-Spam-Info: AW1haW4tMjYwODA3MDAxNSBTYWx0ZWRfX247FdA6SsXFU figBNMHflRBUDSiVMBcpMU+4zDbkcsXxSUO6qEuq7oLk84C+F/hpjkMg3BUnLFT3pz9qpLcwWDL gvVe7iKpTWu+dzw3ds43DpeL1lH9vDU= X-Proofpoint-ORIG-GUID: DtINX2XRDcvrGwAkAdlHpEbc4-h4c5mX X-Authority-Analysis: v=2.4 cv=MbpcfZ/f c=1 sm=1 tr=0 ts=6a754431 cx=c_pps a=JbAStetqSzwMeJznSMzCyw==:117 a=uw/3876vWhRnNVL35W6mqQ==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=ZpdpYltYx_vBUK5n70dp:22 a=KKAkSRfTAAAA:8 a=YaFGZCiNkOP6CsGDcAoA:9 a=QEXdDO2ut3YA:10 a=uxP6HrT_eTzRwkO_Te1X:22 a=cvBusfyB2V15izCimMoJ:22 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=2026-08-07_01,2026-08-06_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 adultscore=0 priorityscore=1501 clxscore=1015 malwarescore=0 bulkscore=0 lowpriorityscore=0 suspectscore=0 spamscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608070015 On 8/5/26 10:06, Ronald Claveau via B4 Relay wrote: > From: Ronald Claveau > > Replace the hardcoded MAX_LEVEL constant and fan register > with values read from platform_data (fan_reg, levels[] and nlevels), > as new MCUs need different values. > > The cooling device's state is stored as an index into levels[], > and khadas_mcu_fan_set_level() writes levels[state] to fan_reg, > rather than writing the raw state value as before. > > Optionally acquire and enable a "fan" regulator supply > at probe time and on resume, > so boards that gate fan power through a regulator are handled. > > Reviewed-by: Neil Armstrong > Signed-off-by: Ronald Claveau > --- * Through which tree this patch should go ? (assuming there is a dependency on other patches) * How this will behave with 100 levels with the step wise governor ? For a 100ms passive delay and 100 states, it will take 10s before reaching the full speed