From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 054F38F54; Tue, 17 Jun 2025 16:44:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750178682; cv=none; b=L4zX+w8ZhHa/pAJrU/b4wEWMlt5gnQ6bwwTyJfLoBZt1t1KEA/TsuBqzFQYzG/qOokuUIxs31QZxKcHM3/xCcvDYQp5y0+x26YZ5JWT1NMuBHr/x8qdnFfUyeX549LeuG87N2EjJ+rAVQ9ozixF8iru6bGFJP0FtlBMe/VfCmWg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750178682; c=relaxed/simple; bh=9Z+XW2vy53Qr1Sj7gucB5nEwTNxkm6KIJ0UemzABZwk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=WnZlfo/FyNtirU1X+seQIRf53z0etAOSkLkB/QbzoikAuup3L6uPaTK4ulXWa3QQOY2jCi7cBS+ogkNfKZqFM55YOeHsDD1+iKL2KlXlI2ugOFh+HPtT66/ORWiseWvODQ0Ez3X27XjmS51Z7hBcIFlYYz2TVIarP7a7jTifzdw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=rqZkWvOs; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="rqZkWvOs" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 69FE2C4CEE3; Tue, 17 Jun 2025 16:44:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1750178681; bh=9Z+XW2vy53Qr1Sj7gucB5nEwTNxkm6KIJ0UemzABZwk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rqZkWvOs8IqHgmswqYGWJouMb2PSI93vlbaQmc6Uti/oonCirExreERjePEbsA7Gv ArI/iZvUeQJAus4hxKcC4LBJ3+6UIoh+fOOABOe5r6swoOGWPV91Gr5dfsoxQSy882 xynzaxxYu5EFtT4PPEr3tsOXHU+A30A4tHg2xwTc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Marcelo Schmitt , Jonathan Cameron , Sasha Levin Subject: [PATCH 6.15 522/780] iio: adc: ad7124: Fix 3dB filter frequency reading Date: Tue, 17 Jun 2025 17:23:50 +0200 Message-ID: <20250617152512.772837592@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250617152451.485330293@linuxfoundation.org> References: <20250617152451.485330293@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Uwe Kleine-König [ Upstream commit 8712e4986e7ce42a14c762c4c350f290989986a5 ] The sinc4 filter has a factor 0.23 between Output Data Rate and f_{3dB} and for sinc3 the factor is 0.272 according to the data sheets for ad7124-4 (Rev. E.) and ad7124-8 (Rev. F). Fixes: cef2760954cf ("iio: adc: ad7124: add 3db filter") Signed-off-by: Uwe Kleine-König Reviewed-by: Marcelo Schmitt Link: https://patch.msgid.link/20250317115247.3735016-6-u.kleine-koenig@baylibre.com Signed-off-by: Jonathan Cameron Signed-off-by: Sasha Levin --- drivers/iio/adc/ad7124.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/iio/adc/ad7124.c b/drivers/iio/adc/ad7124.c index 3ea81a98e4553..7d5d84a07cae1 100644 --- a/drivers/iio/adc/ad7124.c +++ b/drivers/iio/adc/ad7124.c @@ -301,9 +301,9 @@ static int ad7124_get_3db_filter_freq(struct ad7124_state *st, switch (st->channels[channel].cfg.filter_type) { case AD7124_SINC3_FILTER: - return DIV_ROUND_CLOSEST(fadc * 230, 1000); + return DIV_ROUND_CLOSEST(fadc * 272, 1000); case AD7124_SINC4_FILTER: - return DIV_ROUND_CLOSEST(fadc * 262, 1000); + return DIV_ROUND_CLOSEST(fadc * 230, 1000); default: return -EINVAL; } -- 2.39.5