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=1794064188; b=qHUGeHhrCMW452byHe/+lzAk/G2NdgNBVTknzTN9fdYtyaYon1yPx9lqlZJtnR3Mcb6g hHQSElCIAZxUPsYg/pRmrzhx3CqSEh5b+RkpRiX6qTGckuTNUKIRRRSW4xsPmD1atFLbb i9NHpglyuFwdXP+BakygGXu3I8JxZjeHK1boiW11Ebv2a47L8RxEiUlIttQeTy6GHtxoj +lTF67XKtswIj0BEbysvV/LCZRolj8nOIEjLFWn02dmwvGBiGFHEvgKxL2FPljcfnBjdK cMo0YFOH07sm/WuiaH3ShQDDm5erPraePgp8TYZLf0DzymDtgYMzL2jsMkGqiMi6iRw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794064188; 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=G3xokjhhN8VnWA5fmi0qkSXY7niRyiVjeLQA18V28tI=; b=dfz9ctri84NNx+RvRPAInIO0XlLylprVJGZD3xvm24oEdv3DzA8UC3PsVwblWbtPM5de vhTJJexpLIs8kgdLvEx7LSUOQdkdq8dG3dhhgwemt2QnRlZSAZhC9Nf/H4uXPM7IkvMik KuYa4mO8WPzdcHAgrH/UAAK9WJ1M7iVUz7o8BNWMrsbj+XAIa4pvvJ6wDTk9MspcT3B3I 3zkI7Me+67xIOkj0w91hLKigQR2Bfi7yHhKtEnyNe5nDGW0InX+7YjF5u468G/4QtMmEV UJXuJgpAjLrON2TjLazmX2FMf+3b1LQNQ/zpOEVJOOvCU1cP5TSpTmxz1K1EMSCTLMg== 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=NwuF4MQc; 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 A777A606E8EF; Sat, 7 Nov 2026 15:09:47 +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=NwuF4MQc Received: by smtp.kernel.org (Postfix) with ESMTPSA id 563901F0089F; Sat, 7 Nov 2026 15:09:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794064187; bh=G3xokjhhN8VnWA5fmi0qkSXY7niRyiVjeLQA18V28tI=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=NwuF4MQcumOE56kODgvwRjqOdSxKiMJ6Zu9aKPiFfyT8IjPSN6GhAmc7AuPmV9aVA yEeu1W/HGvLybqEaLz5FS0Lnh3BnnhuFuky80uGMGOXOgFus3jFsqscnj13jsb/blj +n1fW6Smn34LPBpAXw2/mVzt7/enh4ZvNBQkpaA4= 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 7.3 0329/1257] iio: adc: ad4080: enable address ascension for chip identification Date: Sat, 7 Nov 2026 08:43:45 -0500 Message-ID: <20261107134948.507791675@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261107134939.434104957@linuxfoundation.org> References: <20261107134939.434104957@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: stable@vger.kernel.org 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 7.3-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 04cd6628ebffb..7b3b338886b47 100644 --- a/drivers/iio/adc/ad4080.c +++ b/drivers/iio/adc/ad4080.c @@ -685,7 +685,8 @@ static int ad4080_setup_channel(struct ad4080_state *st, unsigned int ch) return ret; ret = regmap_write(st->regmap[ch], 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