From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) (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 6EF9A2E62B4; Wed, 19 Aug 2026 12:41:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=68.232.154.123 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787143282; cv=none; b=R2AYhGpnI0TsB6aejW6rZ9I8Lbaw7ZlrgAs6krFszqNsiB959QXL635ye8gd90G8ZqVV2G6JL024yd7oe2Is6Kyd5+dAIIbzc5T3La58D9oDShZSJkh+F3ZLshBMR/mqEKwy4HxgSrZJPYlIdz2bGkq4cKan8cgOMdRuqcboZAA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787143282; c=relaxed/simple; bh=0kfQCrAJAnt1AGSQBDQb2mzczFIyr/6cg3aznhPRdjQ=; h=From:Date:Subject:MIME-Version:Content-Type:Message-ID:References: In-Reply-To:To:CC; b=Bc2Nnzas0F1hoNV+ur4E+IlZ7cgW/slh0k2OPaCpPfMUizcjIts2wsuCTtKpPf5+h8MqrgK4plufRvloh8uSjPs4HH3XF7WUb73LB9jRoI0jJDBmJhFtAbQH0SxR0pjbYBtgDzWKGTgZbGVWfLyx12UGiZuiwg+o465sSA8hs0k= 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=J6qZvlIE; arc=none smtp.client-ip=68.232.154.123 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="J6qZvlIE" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1787143280; x=1818679280; h=from:date:subject:mime-version:content-transfer-encoding: message-id:references:in-reply-to:to:cc; bh=0kfQCrAJAnt1AGSQBDQb2mzczFIyr/6cg3aznhPRdjQ=; b=J6qZvlIEQWg3Yb6ZBpS+QMG1kgqkgqJBGIXbVLMz07PobDWO9P+xyInO 04Vqu6Gj14SA4r0BAjQbIJnFRC7dV1TsrDnvIVd73Acp4gXFn1Ov6vpSg EU4O6RUjE7DWwB1PSaqrRyyWM6pykJ6Gns5fwdd7R73c0pguthIOEZtkq VFjpfuCw4SghvP8BjTI6ekGuT4N9RFERqygLxVLVXu97pNx2pmUTpAGL+ 7ocClNrWHWi3ZvjHVkef5x8DdL/mb9xP+C2GHTLR8rJgbqFLCqX/29Z1z JylKuTbcI1RH9n/uv+K+YUlEkyrlQfJfWoPoShBgliaW+7JTEBVhh5iUB A==; X-CSE-ConnectionGUID: 9zn0HIDgQ2S1wuNd99srCg== X-CSE-MsgGUID: qv+VOYEmQw2vYyrhTtVhHQ== X-IronPort-AV: E=Sophos;i="6.25,231,1779174000"; d="scan'208";a="61462183" X-Amp-Result: SKIPPED(no attachment in message) Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa4.microchip.iphmx.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Aug 2026 05:41:15 -0700 Received: from chn-vm-ex01.mchp-main.com (10.10.87.71) by chn-vm-ex4.mchp-main.com (10.10.87.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.2.2562.45; Wed, 19 Aug 2026 05:41:15 -0700 Received: from [127.0.1.1] (10.10.85.11) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server id 15.1.2507.58 via Frontend Transport; Wed, 19 Aug 2026 05:41:12 -0700 From: Ariana Lazar Date: Wed, 19 Aug 2026 15:41:05 +0300 Subject: [PATCH v4 1/9] iio: dac: mcp47feb02: initialize dac_data field in channel data struct at probe 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: <20260819-mcp47feb02_refactor-v4-1-beb2aa3bfd09@microchip.com> References: <20260819-mcp47feb02_refactor-v4-0-beb2aa3bfd09@microchip.com> In-Reply-To: <20260819-mcp47feb02_refactor-v4-0-beb2aa3bfd09@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 X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1787143269; l=1156; i=ariana.lazar@microchip.com; s=20250825; h=from:subject:message-id; bh=0kfQCrAJAnt1AGSQBDQb2mzczFIyr/6cg3aznhPRdjQ=; b=VFvZJyhRr9Zvmz1JiOq3KvEY/Cn/iagqyE+8QTpzk19UzupGbuZ95L8LCbnkgiSZXeByx8hx8 cVQowOFkcUtBleQOgWmSUBFtNCDKbdPcHewmWehqgp8qES61lVnvOAJ X-Developer-Key: i=ariana.lazar@microchip.com; a=ed25519; pk=jmvf1fSxcnzZmXfITM3L94IwutM+wqA1POQHiYyD6Dk= Read DAC value register to initialize corresponding field in channel_data struct when the module is inserted. Signed-off-by: Ariana Lazar --- drivers/iio/dac/mcp47feb02.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/iio/dac/mcp47feb02.c b/drivers/iio/dac/mcp47feb02.c index a823c2a673a26d70e5829cb587034da435af0451..7502959d98eab27941d58b6b961e6e3dee4222e6 100644 --- a/drivers/iio/dac/mcp47feb02.c +++ b/drivers/iio/dac/mcp47feb02.c @@ -1020,7 +1020,12 @@ static int mcp47feb02_init_ctrl_regs(struct mcp47feb02_data *data) gain_ch = gain_ch & MCP47FEB02_GAIN_BITS_MASK; for_each_set_bit(i, &data->active_channels_mask, data->phys_channels) { struct device *dev = regmap_get_device(data->regmap); - unsigned int pd_tmp; + unsigned int pd_tmp, dac_val; + + ret = regmap_read(data->regmap, REG_ADDR(i), &dac_val); + if (ret) + return ret; + data->chdata[i].dac_data = dac_val; data->chdata[i].ref_mode = (vref_ch >> (2 * i)) & MCP47FEB02_DAC_CTRL_MASK; data->chdata[i].use_2x_gain = (gain_ch >> i) & MCP47FEB02_GAIN_BIT_MASK; -- 2.43.0