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 07F51253F20; Mon, 23 Jun 2025 13:35:47 +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=1750685747; cv=none; b=DGPXwlGlFE672Md9Smtpizx+0V+f+ADNV8jFxoUJROW975t4mao8C+cNDOtQCL70aZpPq+rMfrDzJkBGqnlopgB4iZzAl/w83xWQHQgKKM0ygBuh0hGs4dEO1Kg0BVh91QxJ0fBHMZhtsOVkFI9MHqDuWfR22a4udZdr586rNsI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750685747; c=relaxed/simple; bh=RRCXfEprhEVtcpATvkLNC2zN7MM/jznvAmeCaX10BsI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Ek0N19s8SlxxkzS3zVJOUsl67cpWFC/cYoryFP1h8uhRdNrBSV2cxVCFL0q7rWxXZ2ideAe4sXBVCpqeEKPgUsFebFFm/lPNiNhd6BoJS6695yns5SWUpxsqfHPjm53WOBiBDbW8kbhXpUML5CCHLS+Qx5OoleA2y/ijFc/p4Zg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=OlaG3zzz; 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="OlaG3zzz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8ED60C4CEEA; Mon, 23 Jun 2025 13:35:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1750685746; bh=RRCXfEprhEVtcpATvkLNC2zN7MM/jznvAmeCaX10BsI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OlaG3zzzIJjc/9ta8ezEGXHujZYhIuGkcQYZ90QVprcXTHgZrwsQ1XDJoslcqOxp4 FSKpISHsEDE5jOKvcc6p1lxmPaROpKs21F+0a8jB1+NgzX/InDacH58GgUUMU2KR6z Qb5z2oAghonFz2Zocnl8FkInVKBrdPZzYcHiYquw= 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 5.10 092/355] iio: adc: ad7124: Fix 3dB filter frequency reading Date: Mon, 23 Jun 2025 15:04:53 +0200 Message-ID: <20250623130629.563496455@linuxfoundation.org> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20250623130626.716971725@linuxfoundation.org> References: <20250623130626.716971725@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 5.10-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 99d1288e66828..503814fca4dc0 100644 --- a/drivers/iio/adc/ad7124.c +++ b/drivers/iio/adc/ad7124.c @@ -320,9 +320,9 @@ static int ad7124_get_3db_filter_freq(struct ad7124_state *st, switch (st->channel_config[channel].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