From nobody Thu Oct 2 23:49:46 2025 Received: from mail.subdimension.ro (nalicastle.subdimension.ro [172.105.74.154]) (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 3A98C30F924; Wed, 10 Sep 2025 07:58:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=172.105.74.154 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757491095; cv=none; b=Q7dOF7BsyAtRv8aQAgpoMAB/bmt768S0JK/ptD+2QfcPQyT6JE1VdbOmwHiERX32rx5MI0uIMkAh2Ho/k3z6tAYk9v4agZFgJed+OFfh+FCa1a12WM44LODpewGXoyBZ6cGlVFAq8yUt6MtTbxeEs3TmGenlN7Qwp1jzU/G2kOU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757491095; c=relaxed/simple; bh=GfiWXyX7LPifOUfYn9+ZkSeq0DR2UY+Z/0jCplTp0Pk=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=MA8EGtRP847JyYOFCmxCU3GvNJ9j6b5LBzJ7K/pR1oYjT012TyrLE8TRYt+pNFZQn09jLNVkO6z2KxraAnczFM5ggpNIZ1n80PWlvc0LMvq6Tv4hYuBvK2amQTtAJCfEhCzmu+EytSvQHt0AVviwMdQMYBspWBk2DOt7TrqDkfc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=subdimension.ro; spf=pass smtp.mailfrom=subdimension.ro; dkim=pass (2048-bit key) header.d=subdimension.ro header.i=@subdimension.ro header.b=NL14pc/X; arc=none smtp.client-ip=172.105.74.154 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=subdimension.ro Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=subdimension.ro Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=subdimension.ro header.i=@subdimension.ro header.b="NL14pc/X" Received: from [10.212.0.13] (unknown [IPv6:2a02:2f0e:3503:4a00:e2d5:5eff:fed9:f1c4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mail.subdimension.ro (Postfix) with ESMTPSA id B621C173BF2; Wed, 10 Sep 2025 10:58:05 +0300 (EEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=subdimension.ro; s=mail; t=1757491086; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=u8p82y0f5BUKpqRAfpnZdMPA1+ijprn7JFqFj01MehI=; b=NL14pc/XUxhLQU+CpvyA7+EVpsKWGUcZabNboFPz9iOv1GeTCdrfs9YUbsOJ5YOGk8oLEa Qi/HXgsfRSXNnCwCEpkrl8HNmPvALUqvJ+c7fmhs4eHuBwUOHOLlz9fXaDCn93XYIQV15v LWYj7lnPb+C6G5qF4SGFS01nIiLflC2Pvpy1Cq2E+7EGRNjrO9OKqaczx+te+3eB5sDkl+ 6w44HM0i/vxxLh2YeffaxaUZ8VnaDFkqkayRPfaWgVFasnzNyFlbcqRjof+Nd3J+wM7Xol SjsajWxQ9AfRCViCQXGGEdv7j5SdtVSNq4olfjyoZsz2R2Z6P0nzXzxjGkBqrg== From: Petre Rodan Date: Wed, 10 Sep 2025 10:57:15 +0300 Subject: [PATCH v2 10/14] iio: accel: bma220: add i2c watchdog feature 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: <20250910-bma220_improvements-v2-10-e23f4f2b9745@subdimension.ro> References: <20250910-bma220_improvements-v2-0-e23f4f2b9745@subdimension.ro> In-Reply-To: <20250910-bma220_improvements-v2-0-e23f4f2b9745@subdimension.ro> To: Jonathan Cameron , David Lechner , =?utf-8?q?Nuno_S=C3=A1?= , Andy Shevchenko , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Jonathan Cameron , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Petre Rodan X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1734; i=petre.rodan@subdimension.ro; h=from:subject:message-id; bh=GfiWXyX7LPifOUfYn9+ZkSeq0DR2UY+Z/0jCplTp0Pk=; b=kA0DAAgBzyaZmYROfzAByyZiAGjBL4egSduQZnS2wnOn7+U3gLWpmiYM7eN8AGlx82rY/aESi okCMwQAAQgAHRYhBNgKf8F2FRk17D5fqc8mmZmETn8wBQJowS+HAAoJEM8mmZmETn8wYF4QAIeE v0wJrqFF8kM9NdHaEmHKGr2jXK0LnmM+2yjJ8yREzHwNowPEdkT1wD49xv8K2S8qSzQ6rxqa2ua SpFK2/XPxhm5lY3z0A2yjfwoPe8oWTKXcEkyZf4rhiCro/RSIQ0be3g0IE3ksod+0FXphkD9V5u 2sfKfQA8codPtRPYcsjsCJpeC54f1XVuzNqynoEuWS3C2Zc3SfTtdKusnwViVg8kUkuwyXkfg31 xDyHOefNUPqkb9/vtd/U3cB1pwkep7LdPWxvQrk7a4b+IS/rpDgG7r39Ju07dZWjpbAAA9jaIJF ZJvoZO5/BPFRUIf8d/WhzXJ6LE3bgaY+AgWJJhSTVwwkt6nut+5CqpWfcNvn3OaIaa+YAWvwRCu UbD+Q7bITQGWN5apbjDuweply+wnrvYW7VCKJREk234rKL5nyKrp5e9gNHv8jbBM/tLolabYWn3 Kxqal8RUW5dvkXNJHgF441uiA7V812rpRD95vY+NlmT3e47Tcvm1CJYWUDm6RUhjlve1IuJp7A6 +RYKwthHzfgiKvbfYaYj988+SUWDOu3CeifPxZtSfPexvo4pTlOCGI8A8BHbZAbGUP5mfDQ7OmF zVrhYyzOOYZ919MvX32FR4SG8uM0LSsviIBRoOdQO9Tfzi0vESCJYNdnTr3q5hAGg28w/76K/I1 z8dB+ X-Developer-Key: i=petre.rodan@subdimension.ro; a=openpgp; fpr=D80A7FC176151935EC3E5FA9CF269999844E7F30 Sometimes the sensor gets stuck and enters a condition in which it pulls SDA low, thus making the entire i2c bus unusable. This problem is mitigated by activating a 1ms watchdog implemented in the sensor. Signed-off-by: Petre Rodan --- ChangeLog: - hardcode 1ms timer watchdog to any i2c-based sensor instead of configuring a dt-based property - rename bma220_wdt() to bma220_set_wdt() --- drivers/iio/accel/bma220_core.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/iio/accel/bma220_core.c b/drivers/iio/accel/bma220_cor= e.c index 191074d8618ea2638f69283781b8677921876681..b619f5a0bf713b4d386a5d4fc1d= 919e144798f02 100644 --- a/drivers/iio/accel/bma220_core.c +++ b/drivers/iio/accel/bma220_core.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include #include @@ -359,6 +360,11 @@ static int bma220_power(struct bma220_data *data, bool= up) return -EBUSY; } =20 +static int bma220_set_wdt(struct bma220_data *data, const u8 val) +{ + return regmap_update_bits(data->regmap, BMA220_REG_WDT, BMA220_WDT_MASK, + FIELD_PREP(BMA220_WDT_MASK, val)); +} =20 static int bma220_init(struct bma220_data *data) { @@ -390,6 +396,13 @@ static int bma220_init(struct bma220_data *data) if (ret) return dev_err_probe(dev, ret, "Failed to soft reset chip\n"); =20 + if (i2c_verify_client(dev)) { + ret =3D bma220_set_wdt(data, BMA220_WDT_1MS); + if (ret) + return dev_err_probe(dev, ret, + "Failed to set i2c watchdog\n"); + } + return 0; } =20 --=20 2.49.1