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[2003:f6:5f20:eb08:4c77:7289:617e:c110]) by smtp.gmail.com with UTF8SMTPSA id 5b1f17b1804b1-488f4352af8sm1813025e9.0.2026.04.15.07.50.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 15 Apr 2026 07:50:29 -0700 (PDT) From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= To: Fabrice Gasnier , Maxime Coquelin , Alexandre Torgue Cc: Andrea della Porta , linux-pwm@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com Subject: [PATCH v1 0/2] pwm: stm32: A rounding fix and a cleanup Date: Wed, 15 Apr 2026 16:50:11 +0200 Message-ID: X-Mailer: git-send-email 2.47.3 Precedence: bulk X-Mailing-List: linux-pwm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Developer-Signature: v=1; a=openpgp-sha256; l=1023; i=u.kleine-koenig@baylibre.com; h=from:subject:message-id; bh=Ev/XoHpc/zuPC3jNLuLXs/GGVRgRWnbEC5JNIWTtnCQ=; b=owEBbQGS/pANAwAKAY+A+1h9Ev5OAcsmYgBp36Wjy7gOvxddwOd586qrs+Qr4Imv1lEkngzDs a0aP4AneEOJATMEAAEKAB0WIQQ/gaxpOnoeWYmt/tOPgPtYfRL+TgUCad+lowAKCRCPgPtYfRL+ TuWdB/sHjGdz6bLApfg5wvD90asOZlq5wB95iiT/6qRsVYZNCaJZvEINb9YE4OEuA2dTiBjambl b6WdQWEge1t3Wo4OZ52Doxb8A3k18jC6nvZOptwlnTK91Q9fXC8RNq1J1ozziVeRfXq+dAI7HMQ 8en5ZtFdJ/DF9/q9wIZtpXjPVJwQ751TKrA98Lqvjkbs7kzbrLqnVOHnnAcolIoxzP5+r14HpY5 EsoWfhrDwAfycXsU8De7046F6a+uS875tdeB+Lx4Ehcf1MgsV8b/378tlBM4AE/iZI2ic6WGgu6 /RnTXNof99lHnCe70yk1qU9UXAZew5PooAETyvnRFB9uMBBm X-Developer-Key: i=u.kleine-koenig@baylibre.com; a=openpgp; fpr=0D2511F322BFAB1C1580266BE2DCDD9132669BD6 Content-Transfer-Encoding: 8bit Hello, I extended pwmtestperf (part of libpwm[1]) to allow testing inversed polarity wave forms. I'm not sure if I should like it or not, but this immediately showed a rounding issue in the stm32 pwm driver. This is fixed in the first commit. The 2nd commit is just a cleanup that I have on my todo list for a while. This required the addition of mul_u64_u64_div_u64_roundup() which exists since v6.19-rc1~70^2~90. I intend to send the fix to Linus before 7.1, but will give it a bit of time in next before. The cleanup will wait until the next merge window. Best regards Uwe [1] https://git.kernel.org/pub/scm/linux/kernel/git/ukleinek/libpwm.git Uwe Kleine-König (2): pwm: stm32: Fix rounding issue for requests with inverted polarity pwm: stm32: Make use of mul_u64_u64_div_u64_roundup() drivers/pwm/pwm-stm32.c | 49 ++++++++++++++--------------------------- 1 file changed, 17 insertions(+), 32 deletions(-) base-commit: 028ef9c96e96197026887c0f092424679298aae8 -- 2.47.3