From nobody Sun Apr 5 13:07:08 2026 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 23C122F6188; Fri, 20 Feb 2026 16:46:28 +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=1771605988; cv=none; b=CCBxU+d60lrfvk318nXNZXzLb7N7DG8/h+heS/YWN9eGiG0+s6QyvTVypZ0lHpH5Df6fbZfu8Y57jqwelq7X7x6Zz9n56toGsgpUVvhvZubdqv2zPMZoorQLVZEbz/xSCyGQojYy4CKFzkaqfyJORzlkggWxHfTsBj5Uivj9ccw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771605988; c=relaxed/simple; bh=5YTkN45Ecj5gyMlFHFchWQf8TOCq8dC82xC3M3uTtlI=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=gWu3gtyf1pGgNWoYoLN+KcOgD/vAYNxzk6gmtarBKA8tVD1GCbDlcFm3n5c7BlpVvDwrzXBp7pN08jycemolBTqjiZ2tqJ3wGuW4nYv4TMs0QgKI3OBZpNEL0J1L7jBBoHIZ/vB6jOm2tn/0GTkIxC0o30QG8fI73QtZ37xlXy0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=A86aFCGu; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="A86aFCGu" Received: by smtp.kernel.org (Postfix) with ESMTPS id D40E7C2BCB0; Fri, 20 Feb 2026 16:46:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1771605987; bh=5YTkN45Ecj5gyMlFHFchWQf8TOCq8dC82xC3M3uTtlI=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=A86aFCGujY66P6yJLrVgM3kDrIJXwOotJSyvFiTbB79Pp48KMkRyMqF4bI7yBo1sP jnQ7QsBEOt+UixLGJRWsnyhUtp9huSidRB5r8xZTV+1KsaQf1YfG8+fSgZ/euCEUxq nyvv+Dfx0Ujx3G1L5f5bJABh3aU4xEcJpOU2ZYB8iuROgBrSSSrH/Hh57U3YjAM0hP n2XeBQI1qdulLuNFfh4/ak93f184eToYBvtlGId8qLPByNiFDZG5X8DIq5MyjPj8+x jjFKOk9SJmatABYEimHOvHXwiae20SyTKtURG9baFm0eJ4vYDlQ+5Phvrzz7LkUkDu ZFNdwA2zLLdNw== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id CA883C5AD2C; Fri, 20 Feb 2026 16:46:27 +0000 (UTC) From: Rodrigo Alencar via B4 Relay Date: Fri, 20 Feb 2026 16:46:08 +0000 Subject: [PATCH RFC 4/8] iio: frequency: ad9910: expose sysclk_frequency device attribute 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: <20260220-ad9910-iio-driver-v1-4-3b264aa48a10@analog.com> References: <20260220-ad9910-iio-driver-v1-0-3b264aa48a10@analog.com> In-Reply-To: <20260220-ad9910-iio-driver-v1-0-3b264aa48a10@analog.com> To: linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Lars-Peter Clausen , Michael Hennerich , Jonathan Cameron , David Lechner , Andy Shevchenko , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Philipp Zabel , Rodrigo Alencar X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1771605986; l=1404; i=rodrigo.alencar@analog.com; s=default; h=from:subject:message-id; bh=3u3vH6CTF1USbub44V9JoeQJxCYLlIqHrcKGASf1v1Q=; b=iDOfa8mp9mZIXa7ZbDGNGhBxsqzthOCKwINnqC2zBsNzPIZC3z6beNB+jIXWPztWvytHIs1Xv XfETCKlfGOpCj0+8LIseeJprlX6OthL1X29aWuUOrdtBTwq1to8FSoC X-Developer-Key: i=rodrigo.alencar@analog.com; a=ed25519; pk=ULeHbgU/OYh/PG/4anHDfLgldFItQHAhOktYRVLMFRo= X-Endpoint-Received: by B4 Relay for rodrigo.alencar@analog.com/default with auth_id=561 X-Original-From: Rodrigo Alencar Reply-To: rodrigo.alencar@analog.com From: Rodrigo Alencar Add read-only sysclk_frequency sysfs attribute. This value is important for userspace to calculate values to populate the Parallel Port or the RAM data buffer. Signed-off-by: Rodrigo Alencar --- drivers/iio/frequency/ad9910.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/iio/frequency/ad9910.c b/drivers/iio/frequency/ad9910.c index bb280972e84c..a72e3685f676 100644 --- a/drivers/iio/frequency/ad9910.c +++ b/drivers/iio/frequency/ad9910.c @@ -789,10 +789,31 @@ static int ad9910_reg_access(struct iio_dev *indio_de= v, return ret; } =20 +static ssize_t sysclk_frequency_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct ad9910_state *st =3D iio_priv(dev_to_iio_dev(dev)); + + return sysfs_emit(buf, "%u\n", st->data.sysclk_freq_hz); +} + +static IIO_DEVICE_ATTR_RO(sysclk_frequency, 0); + +static struct attribute *ad9910_attrs[] =3D { + &iio_dev_attr_sysclk_frequency.dev_attr.attr, + NULL +}; + +static const struct attribute_group ad9910_attrs_group =3D { + .attrs =3D ad9910_attrs, +}; + static const struct iio_info ad9910_info =3D { .read_raw =3D ad9910_read_raw, .write_raw =3D ad9910_write_raw, .write_raw_get_fmt =3D ad9910_write_raw_get_fmt, + .attrs =3D &ad9910_attrs_group, .debugfs_reg_access =3D &ad9910_reg_access, }; =20 --=20 2.43.0