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 ED28B1DF98B; Mon, 23 Jun 2025 21:12:59 +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=1750713180; cv=none; b=H4lYQZjOQysOOkhkikvYjdxIYroQyFsv3PRpV/CVBsB8URagCiD1aRZHLt5AkoTVaoIb9/JmgeOmIgfzEbK6rK04MirPCrHszxX5/WJyuYe1P8mcBiWK5y12yS/aNUkoz8sffWkMjkfud2KdsjCIK6vDfRvHFqRdMyWALwhueAM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750713180; c=relaxed/simple; bh=WrYFip44DvSEzzFWsN0c5Zo9h+C1RlQbW6WhPB1aA2Y=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=UTG6+HGuvxatlvwWFw4d2jiPxn8JsQgFCZch+v0PGs9uqpL8GcA1Ay8tLGRylzMwebqpby/A2riH/j6KJi0q8XFad5EOE5KA9pnIVzhrK62Q5XbDlY+BoDT+sT8spTDIujpGrfQV0jqiPtR9o9bQAiZVXBRfn/FTMrljBBn/MuQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=rThK1twZ; 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="rThK1twZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 85CD8C4CEEA; Mon, 23 Jun 2025 21:12:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1750713179; bh=WrYFip44DvSEzzFWsN0c5Zo9h+C1RlQbW6WhPB1aA2Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rThK1twZoWhGZFfjuZdvpjkcVXkdE1kXncyoVvOxTEVzxbkOusMEN7QDKcEQ41d37 xhS7StfPss/QT1+HWtIIEGmZmeSBpiUjoqt7IFeMBCcBfq7YWONths70hRweSyMOmU dWPTpL2Pk0lbpWbeNHxoi8LkpbKGwQVrZHwMyuvM= 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 5.15 109/411] iio: adc: ad7124: Fix 3dB filter frequency reading Date: Mon, 23 Jun 2025 15:04:13 +0200 Message-ID: <20250623130636.265246540@linuxfoundation.org> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20250623130632.993849527@linuxfoundation.org> References: <20250623130632.993849527@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 5.15-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 31c8cb3bf811b..c018437177ba6 100644 --- a/drivers/iio/adc/ad7124.c +++ b/drivers/iio/adc/ad7124.c @@ -297,9 +297,9 @@ 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