From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.153.233]) (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 7648450EC19; Wed, 16 Sep 2026 14:19:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=68.232.153.233 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789568375; cv=none; b=t8KqmF7eRqiBL6vPwz3NEaWfq8HmC7MHTBgnchE/DUQOTONPGKjElO8yx/Xd5DjkTazilGz8ZxNA8EslL+O1Jq83mqIIuuUHADyQB2ch9G7qvZ45kyLUK91ZDpDA8jsNK6RjiRj0WUQtAqgYokteGGF5mboZTviTEoMuRNpFWxM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789568375; c=relaxed/simple; bh=+kWJEeu8ElxCpnX6JU4X0XLh4hbXb/rAngt2K6QiMbA=; h=From:Date:Subject:MIME-Version:Content-Type:Message-ID:References: In-Reply-To:To:CC; b=h3o6llE/uRhcl+UQojZSa3j9zLvHrYZlvKDQTWMsJU4PgJi0K+riPAkHQynKaWdB3ETcZLWGLg4d9jr4v4N33ZyDA1ywKjyhOidzOeAzzFUGYhJ80+OxYB34E7rwxdQLZTQLkC+DLfi6gCe6ff7oksTIAr2GpRtHxYNCSZFF4iA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=microchip.com; spf=pass smtp.mailfrom=microchip.com; dkim=pass (2048-bit key) header.d=microchip.com header.i=@microchip.com header.b=pH1nu+eS; arc=none smtp.client-ip=68.232.153.233 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=microchip.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=microchip.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=microchip.com header.i=@microchip.com header.b="pH1nu+eS" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1789568373; x=1821104373; h=from:date:subject:mime-version:content-transfer-encoding: message-id:references:in-reply-to:to:cc; bh=+kWJEeu8ElxCpnX6JU4X0XLh4hbXb/rAngt2K6QiMbA=; b=pH1nu+eS98/7fZ+L858kNRcHL0ZDhLGRI6XKRbdPtyzIAu5UQKO/JKmE luzE2WsrRVZUTRktNQyHrWQnbjV+7AiNhOKBJz4JvzNOJuQP3OvMFYTyK 42SMZCdQseHI4fX9VZqSfC4fhxz0JA5ETP5IbIYdtVEWT+EVrbkWRVarE uzpTJJ6pJbp2YxdlQpmCmzRPuWOFG3HYvrDbmTyPMYNy3zbWR0n18U/jX sAkTT2L6RT0zWehCGp5AgZ4dsuipgT8m21aKePh/iSSkm2mQ2NeFAZ3RC NMgbl38CN4VPicl7xB88+U2pAoJWOmBhROndXP7mOjKoVwavpreUw/KTh Q==; X-CSE-ConnectionGUID: iP8P1HvzS8KO9TYqKEpMVw== X-CSE-MsgGUID: wGUSn0uXT4COerlA6Inc8A== X-IronPort-AV: E=Sophos;i="6.27,103,1787036400"; d="scan'208";a="295112902" X-Amp-Result: SKIPPED(no attachment in message) Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa5.microchip.iphmx.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 16 Sep 2026 07:19:32 -0700 Received: from chn-vm-ex03.mchp-main.com (10.10.85.151) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.58; Wed, 16 Sep 2026 07:19:13 -0700 Received: from [127.0.1.1] (10.10.85.11) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server id 15.1.2507.58 via Frontend Transport; Wed, 16 Sep 2026 07:19:10 -0700 From: Ariana Lazar Date: Wed, 16 Sep 2026 17:16:31 +0300 Subject: [PATCH v6 05/11] iio: dac: mcp47feb02: Increase EEPROM Programming Write Cycle Time 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: 7bit Message-ID: <20260916-mcp47feb02_refactor-v6-5-285464651f89@microchip.com> References: <20260916-mcp47feb02_refactor-v6-0-285464651f89@microchip.com> In-Reply-To: <20260916-mcp47feb02_refactor-v6-0-285464651f89@microchip.com> To: Jonathan Cameron , David Lechner , =?utf-8?q?Nuno_S=C3=A1?= , "Andy Shevchenko" , Rob Herring , "Krzysztof Kozlowski" , Conor Dooley CC: , , , Ariana Lazar , Jonathan Cameron , , X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1789568335; l=1619; i=ariana.lazar@microchip.com; s=20250825; h=from:subject:message-id; bh=+kWJEeu8ElxCpnX6JU4X0XLh4hbXb/rAngt2K6QiMbA=; b=9kUc3+qb9QNQYz3yKGTwzW7P+uirbY9Alb0DLx6f2iZk4VwYt4CdETsAVE/M4370gY4X1rGOM +bJgMOeUGr7CgpbqOwymy3T1jJla+dMwMd/bpng96KYMa7KWgsavI31 X-Developer-Key: i=ariana.lazar@microchip.com; a=ed25519; pk=jmvf1fSxcnzZmXfITM3L94IwutM+wqA1POQHiYyD6Dk= Increase the EEPROM write polling timeout to prevent -ETIMEDOUT errors and incomplete nonvolatile write cycle, according to the time specified in the datasheets (11-16 ms). Fixes: bf394cc80369 ("iio: dac: adding support for Microchip MCP47FEB02") Reported-by: sashiko-bot@kernel.org Link: https://lore.kernel.org/all/20260819125300.6B9211F000E9@smtp.kernel.org/ Cc: stable@vger.kernel.org Signed-off-by: Ariana Lazar --- drivers/iio/dac/mcp47feb02.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/iio/dac/mcp47feb02.c b/drivers/iio/dac/mcp47feb02.c index 117fd41257d5cd430c00847ff64c22c6700dbb6a..a93e05cda5f36baf8f7573a1bd92bf6167227362 100644 --- a/drivers/iio/dac/mcp47feb02.c +++ b/drivers/iio/dac/mcp47feb02.c @@ -448,7 +448,7 @@ static int mcp47feb02_write_to_eeprom(struct mcp47feb02_data *data, unsigned int ret = regmap_read_poll_timeout(data->regmap, MCP47FEB02_GAIN_CTRL_STATUS_REG_ADDR, eewa_val, !(eewa_val & MCP47FEB02_GAIN_BIT_STATUS_EEWA_MASK), - USEC_PER_MSEC, USEC_PER_MSEC * 5); + 1 * USEC_PER_MSEC, 150 * USEC_PER_MSEC); if (ret) return ret; @@ -508,7 +508,7 @@ static ssize_t store_eeprom_store(struct device *dev, struct device_attribute *a ret = regmap_read_poll_timeout(data->regmap, MCP47FEB02_GAIN_CTRL_STATUS_REG_ADDR, eewa_val, !(eewa_val & MCP47FEB02_GAIN_BIT_STATUS_EEWA_MASK), - USEC_PER_MSEC, USEC_PER_MSEC * 5); + 1 * USEC_PER_MSEC, 150 * USEC_PER_MSEC); if (ret) return ret; -- 2.43.0