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Mon, 07 Sep 2026 19:28:04 -0700 (PDT) X-Received: by 2002:a17:90b:4ad1:b0:396:635a:9b10 with SMTP id 98e67ed59e1d1-39b2616ef8amr37057434a91.11.1788834484196; Mon, 07 Sep 2026 19:28:04 -0700 (PDT) Received: from [10.239.155.28] ([114.94.8.21]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-39b08bcd243sm30538730a91.5.2026.09.07.19.28.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 07 Sep 2026 19:28:03 -0700 (PDT) Message-ID: Date: Tue, 8 Sep 2026 10:27:59 +0800 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 v3] leds: rgb: leds-qcom-lpg: Add PWM frequency mode support To: Lee Jones Cc: linux-arm-msm@vger.kernel.org, Pavel Machek , David Collins , Subbaraman Narayanamurthy , Kamal Wadhwa , linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260827-lpg-pwm-fm-support-v3-1-88ae5208c57b@oss.qualcomm.com> <20260903153028.GU2133376@google.com> Content-Language: en-US From: Fenglin Wu In-Reply-To: <20260903153028.GU2133376@google.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: _o3SzT1ibPBwdTMqkDEtN9DZbmoljYdg X-Proofpoint-Spam-Info: AW1haW4tMjYwOTA4MDAyNCBTYWx0ZWRfX04X40ENtzcFg mrWtznkzLVVUW8lXNmdptKCtpZtVemUGZUtutP/Ua3IrRtYLJh1K6eY+ffAKkN8YcD+1oXAM59Z +ZXHuxMr2dzlqSJaDscDH9Qg6xkLah8= X-Authority-Analysis: v=2.4 cv=eKwjSnp1 c=1 sm=1 tr=0 ts=6a9f72b5 cx=c_pps a=vVfyC5vLCtgYJKYeQD43oA==:117 a=Uz3yg00KUFJ2y2WijEJ4bw==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=YMgV9FUhrdKAYTUUvYB2:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=nP8d1w5hKBWq8GbY02kA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=rl5im9kqc5Lf4LNbBjHf:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTA4MDAyNCBTYWx0ZWRfXxhue2Lavv9OX FMg1L7oUuK6xe9A/e/wqDUuC8MjUR9VNysm4sVEAlUQIe3SAmzD578GOjnHDB9gY9Bfzu5VVxRn 22CQialCJW93wk04dGjs7ZBa7VjxCow8oDpHa/mLlCLSWyCpq+QY8r7R84OdMuN4nRkALTJqITq bi6LliqW90NWO2zhK7emrP6FmuCElrbSNbptQn4jYugjeq3+T7rBFCYCS9rA0NwP/D7UOuN2paz VzmkmyLF8EO92bnlIDISCv/uW/xymoGJwIWgT9/CKq1WP7PMc/AwpAOEJXIYVweV4bdQSwKOr3e gp8g4owgnZ4L77yqcUO/H2yAocAOh5jo8ehDJHcYQeaAq1YaNJjD1UxTH7oRqP77I5H6pqAGehF T0Z9eDbWISGWMpVgMRsrw6nCaSn74iMRF7mQxNPvu2c5UQ6RR4IRn45ZRvIJYYVxB15TrfPb5fq xFnmVnoN5X6+lOkrSww== X-Proofpoint-GUID: _o3SzT1ibPBwdTMqkDEtN9DZbmoljYdg 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=2026-09-07_07,2026-09-07_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 lowpriorityscore=0 malwarescore=0 priorityscore=1501 suspectscore=0 clxscore=1015 adultscore=0 spamscore=0 phishscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2609080024 On 9/3/2026 11:30 PM, Lee Jones wrote: >> Certain PWM channels on a PMIC (e.g. PM8350C PWM4) support a Frequency >> Mode (FM) that can generate waveforms with more frequency points than >> the standard LPG PWM mode. The trade-off is that the duty cycle can >> only be fixed at 50%. Add the FM support. When the PWM channel is >> requested to set a duty cycle to exactly 50%, use FM mode by default >> as it provides a finer-grained frequency resolution in that case. >> >> Also, guard mutex lock at the top of lpg_pwm_get_state(), to make the >> register read atomic against the register write in lpg_pwm_apply(). > Would it be better to split this submission into two separate patches? One to > address the locking in 'lpg_pwm_get_state()' and another to introduce the new > Frequency Mode support. > Sure, thanks. I’ll split them out and submit them as a series. Do you think if I need to combine below change in the same series, even though they are not functionally dependent? https://lore.kernel.org/linux-leds/20260716-lpg-rgb-color-balance-fix-v6-1-b49d51528f61@oss.qualcomm.com/