From nobody Mon Feb 9 01:11:21 2026 Received: from mail-106113.protonmail.ch (mail-106113.protonmail.ch [79.135.106.113]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 851A14D2469; Thu, 8 Jan 2026 12:45:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=79.135.106.113 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767876353; cv=none; b=Fm/coEmCxLXJ+OibYCm6pFhlHn/vs5JaixCeOvjEjiCklM4xKvSj/6+l3buxDSHUstYwjFTJDwhdFpjMWUO4uVFiI9BcRGXHvctMcjdrqyRmJuudM6jfDVI48l1eYhHx89SvTOQIvDDaRx8JRTZsUaLotbF9LBNXtkhwMW7VebI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767876353; c=relaxed/simple; bh=D6fKN4f7C5FKbpG7szxX8++uDksOX+1oMjGH0iRMq48=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To:Cc; b=i5zk9lTlub6QeUHQXQZnM0DvxL4xaJw3uO/eTcqkeRC/50c8tErLARmSDo1SFzY6Adx10mBHL5DPfDjoZDnWKPdZu0+gwetvyNdgLRv8nKOuM9Z7GSjJ7hvqMDNuicr6NAc7l+x9GPdzQFympB2OiVVGryDotk/v+Br9kf+hc44= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=geanix.com; spf=pass smtp.mailfrom=geanix.com; dkim=pass (2048-bit key) header.d=geanix.com header.i=@geanix.com header.b=lyOmVC6e; arc=none smtp.client-ip=79.135.106.113 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=geanix.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=geanix.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=geanix.com header.i=@geanix.com header.b="lyOmVC6e" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=geanix.com; s=protonmail2; t=1767876332; x=1768135532; bh=aLc1ABNGDOubKMqJjdyEE2rUDJu3+cw3hXTWYt1I64k=; h=From:Date:Subject:Message-Id:To:Cc:From:To:Cc:Date:Subject: Reply-To:Feedback-ID:Message-ID:BIMI-Selector; b=lyOmVC6eOUwGhcHBO5Eb3462sjFxqRvWZvq2Tnb1kiC0M83ZmLC0cGE15QPCn0EMK kF1laGjM9ulpW5X22nlxzMJ85BP/dhI7K6CWlDtnKld6FfPTWSR6zdv03ndr4j9NU0 Ss/4Guj/HI1LBft19+e9PmHrG+KRRO93IF1DGv3PUieuC+syUKAKulF+7GR/KaNubo rSujErEg5+imTtlN4P9JxaF+q7AsQKKt35FTBBrIMYq2GRHE5SgO12fWaPNKBy+jWn pWPn+Ojc2VX2jb9s/f57BlvSiBYPBr5QSGNKGcWchPAUuBNNwDVezVFpSCX5lzuqNc asTVPIsgl8NHw== X-Pm-Submission-Id: 4dn4Pk0Vvcz1DLbC From: Sean Nyekjaer Date: Thu, 08 Jan 2026 13:45:23 +0100 Subject: [PATCH v2] pwm: stm32: Always program polarity Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260108-stm32-pwm-v2-1-ced582974f8b@geanix.com> X-B4-Tracking: v=1; b=H4sIAOKmX2kC/03MSwrCMBSF4a2UOzaSRw2NI/chHcR4095B05KUW CnZu7EgOPwPh2+HhJEwwbXZIWKmRHOoIU8NuNGGARk9a4PkUnPBLyytk5JseU3MCPfoWqU77lu o/yWip+2w7n3tkdI6x/dBZ/Fdf4r+U7JggimFBjtrvFPqNqANtJ3dPEFfSvkAjw/CIKMAAAA= X-Change-ID: 20260105-stm32-pwm-91cb843680f4 To: Fabrice Gasnier , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Maxime Coquelin , Alexandre Torgue Cc: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , linux-pwm@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, Sean Nyekjaer X-Mailer: b4 0.14.2 Commit 7346e7a058a2 ("pwm: stm32: Always do lazy disabling") triggered a regression where PWM polarity changes could be ignored. stm32_pwm_set_polarity() was skipped due to a mismatch between the cached pwm->state.polarity and the actual hardware state, leaving the hardware polarity unchanged. Fixes: 7edf7369205b ("pwm: Add driver for STM32 plaftorm") Cc: stable@vger.kernel.org # <=3D 6.12 Signed-off-by: Sean Nyekjaer Co-developed-by: Uwe Kleine-K=C3=B6nig --- This patch is only applicable for stable tree's <=3D 6.12 --- Changes in v2: - Taken patch improvements for Uwe - Link to v1: https://lore.kernel.org/r/20260106-stm32-pwm-v1-1-33e9e8a9fc3= 3@geanix.com --- drivers/pwm/pwm-stm32.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/pwm/pwm-stm32.c b/drivers/pwm/pwm-stm32.c index eb24054f9729734da21eb96f2e37af03339e3440..86e6eb7396f67990249509dd347= cb5a60c9ccf16 100644 --- a/drivers/pwm/pwm-stm32.c +++ b/drivers/pwm/pwm-stm32.c @@ -458,8 +458,7 @@ static int stm32_pwm_apply(struct pwm_chip *chip, struc= t pwm_device *pwm, return 0; } =20 - if (state->polarity !=3D pwm->state.polarity) - stm32_pwm_set_polarity(priv, pwm->hwpwm, state->polarity); + stm32_pwm_set_polarity(priv, pwm->hwpwm, state->polarity); =20 ret =3D stm32_pwm_config(priv, pwm->hwpwm, state->duty_cycle, state->period); --- base-commit: eb18504ca5cf1e6a76a752b73daf0ef51de3551b change-id: 20260105-stm32-pwm-91cb843680f4 Best regards, --=20 Sean Nyekjaer