From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794590705; b=GnnWU+JdwOJ35+Vzu7wJwuEl3u+yr0ZLiejDz6lCde6C9xILA6Qlj4hAc03OMPJNoXrA XTSwBwFXFu/WKDLQs41pxlIPRjq/W0I8Jk9aj70ZrlrjD5BpMuavfmzOO9Pn4B0cXLxyY FIOzaKsIWZ6M8h04yMCll86CKYF4orCE5kpyE+7A//miGBA2RA3JZFHQcZzfbTGX08Zv/ H8DN30YvcfQ232ksKvw/lqBKKcVilZs8Je+WB9ZJ2e2pYSsrTwqWDyLPM84R6loVQb5wI CIZ01aRBwqJSMSTJhxXVWql9hDDO/QOz9NwHeW2H5BuA6EMjWl8GlJOu5gGbT6dFKNQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794590705; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Type:Content-Transfer-Encoding; bh=IPr9sDbgNwBx+YIT0n477Ep/uX5vYIEz126mz0vFxdE=; b=wIGAUzYd50nvbUDYoT/vZ7RC+6yjRGTesOj9KhvUe7JTCIEV+TZjb5I7JEnULEkuxpLF nBaZsr3OM0/lP9iqZx49zhG+RcVzJk328+NrrRineeP+ApVuUhLuAtVK5QT7T5KDYwQNm lrAXahPODlZ9MjaPljGyqcrMUZWUHcIyTErxJJ2JZ4a3bKzDasuqDgzjZlHN5PV0+o/yo 7CULIiUKXPknChbE/7ZTbloCkljnouMKlbmfm+bD/ct8nPFkB25rah7bJhaHORHjNvPLl RdNp7sd4smd2672aCjX3ognflW1vMtPXC8yVp1DHw2zprdYUQ7AWYmQRuy5uRw36kwQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=G08Odvvj; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 037D9606B224; Fri, 13 Nov 2026 17:25:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=G08Odvvj Received: by smtp.kernel.org (Postfix) with ESMTPSA id A43A21F000C6; Fri, 13 Nov 2026 17:25:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794590704; bh=IPr9sDbgNwBx+YIT0n477Ep/uX5vYIEz126mz0vFxdE=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=G08OdvvjWSdIeUjsTR6hdX6t50W8uSafQWWVfZ0BltPb4xzfBtIPzThiU+BMQ5Hba UoFCK+FSHXQ0knTUk6WnbdGgkEYx3tKR5MD3K7CAlqaHb9MPi4AjSG6z5w78ntI8sm 8dwOT7MgT3neUk0UzIyeqPjSphvBaouzQz9Tpbc4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Antoniu Miclaus , =?UTF-8?q?Nuno=20S=C3=A1?= , Jonathan Cameron , Sasha Levin Subject: [PATCH 6.18 615/686] iio: adc: ad4080: enable address ascension for chip identification Date: Fri, 13 Nov 2026 10:52:28 -0500 Message-ID: <20261113153842.720805765@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261113153820.902362109@linuxfoundation.org> References: <20261113153820.902362109@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: patches@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Antoniu Miclaus [ Upstream commit c051d08d98771132868abf0cb95b6de95ab3060a ] The two byte bulk read at AD4080_REG_PRODUCT_ID_L expects PRODUCT_ID_L followed by PRODUCT_ID_H. After a software reset the AD408x defaults to descending address mode, so the second byte comes from CHIP_TYPE (0x03) instead. CHIP_TYPE reads 0x07 on all AD408x parts, so an AD4080 reports 0x0750 rather than 0x0050 and every part logs "Unrecognized CHIP_ID". Set ADDR_ASC along with SDO_ENABLE before the read. This is the only multi byte transfer in the driver, so no other access is affected. Fixes: b66cddc8be72 ("iio: adc: ad4080: fix chip identification") Signed-off-by: Antoniu Miclaus Reviewed-by: Nuno Sá Cc: stable@vger.kernel.org Signed-off-by: Jonathan Cameron Signed-off-by: Sasha Levin --- drivers/iio/adc/ad4080.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/iio/adc/ad4080.c b/drivers/iio/adc/ad4080.c index e15310fcd21a3..584f273c6bb35 100644 --- a/drivers/iio/adc/ad4080.c +++ b/drivers/iio/adc/ad4080.c @@ -455,7 +455,8 @@ static int ad4080_setup(struct iio_dev *indio_dev) return ret; ret = regmap_write(st->regmap, AD4080_REG_INTERFACE_CONFIG_A, - AD4080_INTERFACE_CONFIG_A_SDO_ENABLE); + AD4080_INTERFACE_CONFIG_A_SDO_ENABLE | + AD4080_INTERFACE_CONFIG_A_ADDR_ASC); if (ret) return ret; -- 2.53.0