From nobody Thu Oct 2 18:21:35 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 3DE552F49EA; Sat, 13 Sep 2025 15:40:17 +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=1757778019; cv=none; b=gSADSWfZq/uB39dR+6wDYPDgMO/KhNzJ8IwLlFTxa/jQQIyqj3J1E2I2cnmO1pqxnu5qgGUK3BZ8zegQJeJfWqDNZgvfBx6KSRwnrTqH4v4YrAvfjuoJexvbkm273h2ZtCf7pV2PDop02F6kCnRoU8FTWMGkNuiLMxmaHgo9gPE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757778019; c=relaxed/simple; bh=P1ByNktlzb54OkAYWKnM+yrvmPUsH4ig/ZXROc/N450=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=CX2OHmDnF6R0skHmK/l9YmUGB+pqu+mAazLzkrsNg7XA530tZJ9kgoKugbXxJ2OKrpz+RMLWZtjFteJJLyXWZVfE6y/zLb/gWFCmRdyU4iv1Ubi2zZLDj8VFpnYcEYq7oLHWgq6PgsNhXtahaWSaNyRbJdlvY5qGo7rbB4QuPeE= 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=kZcA4Jm8; 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="kZcA4Jm8" Received: from [10.212.0.13] (unknown [IPv6:2a02:2f0e:3e0c:5b00: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 74DD2173BF6; Sat, 13 Sep 2025 18:40:10 +0300 (EEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=subdimension.ro; s=mail; t=1757778010; 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=47m/qPFJBR+lEXOa3oWH8mAKCAHufuCZWnCFTKXj2tY=; b=kZcA4Jm8OU1UtmOJl6bfadVorD0glycGVk9D4HEKFtK7+UhCeKUeeNZ/U+U7xul3Xy8z62 0SItrcSD+htBCDCNic1uOu+3rsqbCMKwRavBTeksv4nbYHRjJ0CHevl6op1Iv/C7fZOTbV 5IuTSxC418BKRakMcH6gjqa8KiRY7/TkXmN9mQ+n4Osk1u5wVA5nZCXSouqmtl8wyIn3I9 MuVGf1HT1/6QvYfx4WukzQWNC1sX8kfGujzdU4zvDil6Blqvj9bAMNHuNf+JXt89lFkQU5 VpTxzKHOvwYQL6fSbtJJrnUz50RGCqjd4NbYRavKm/H0TtIzdn26BWnJupQ0lA== From: Petre Rodan Date: Sat, 13 Sep 2025 18:39:35 +0300 Subject: [PATCH v3 14/18] 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: <20250913-b4-bma220_improvements-v3-14-0b97279b4e45@subdimension.ro> References: <20250913-b4-bma220_improvements-v3-0-0b97279b4e45@subdimension.ro> In-Reply-To: <20250913-b4-bma220_improvements-v3-0-0b97279b4e45@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=1761; i=petre.rodan@subdimension.ro; h=from:subject:message-id; bh=P1ByNktlzb54OkAYWKnM+yrvmPUsH4ig/ZXROc/N450=; b=owEBbQKS/ZANAwAIAc8mmZmETn8wAcsmYgBoxZBSd1nrYwVwGQ4EK7GcRQ7VDPRKfUPbr4QUs 1R9AQDT6TeJAjMEAAEIAB0WIQTYCn/BdhUZNew+X6nPJpmZhE5/MAUCaMWQUgAKCRDPJpmZhE5/ ME9ND/9KgcNxAF3coHUrGrQEO27j4vPYfMfZuik7Fz6pJotxYEeuy5Z0UgBI6L8EOGTAskjje1W Q3Vpl1EbbhEIFIFkkg8UEIxYUW0HfuOfh0rk08BqHUgCI3YSBHpb8yol+uSUWZ1Or2YsgsgFeuX yRYHaqlBYZLUFSjoSfLpfxrmtJ+ra7Q6Dj0ZajQuruaHrHWRJ4t2ZyKb3IaU2HopLS5Dhpu1/ht ZgoMwrWKvidtl78+s63BHBexHOUEuXx5tNwRH43fQ/a+kIP2aP+y5o5dKR5GrNJK4uSFg8YjcJ/ RKMM01iFnpyqAq1apnOv1KQo5dhzK2ZF7CLSq/SHnGbfTDy18cM0RYFOXNJsmf4P7xm16/9RtLJ /sWK6UcZDho37CbID/fc+IuZA2rh8/OmmZkHgaSvemr479aYV0s0XYzq6q4TSDv8RY7zps8UfM6 KzIPmM06CgDKf1aiT8Z5fMRtb7ysRHzbjMqMb4iJQ8lMnTAdTGd8Ilh2KpvQTa6ffN2NbpmAM2V eHlSt1FDMh98iAvEH7sNKhKrCvbNpyBLurR7p4uF7dc8PTk50NIkJhYXU9gYwNAbbP1FuAAULgO 0ZZYLO7FyiOy2J8y98KfEoCby9cUIkAkA/Wdo5zIi1Fw2b1R2Mo9kx+1/3W425t5GOPfIesCwwg Xgc4OYF+8W162Og== 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 --- v1->v2 - hardcode 1ms timer watchdog to any i2c-based sensor instead of configuring a dt-based property - rename bma220_wdt() to bma220_set_wdt() v2->v3 no change --- drivers/iio/accel/bma220_core.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/iio/accel/bma220_core.c b/drivers/iio/accel/bma220_cor= e.c index 5eef47151501119ab792aab6a511938a16c1ade1..425a8b981e141aa496351f29df0= 597c989aa4a0a 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 @@ -358,6 +359,12 @@ 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)); +} + static int bma220_init(struct bma220_data *data) { int ret; @@ -388,6 +395,13 @@ 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