From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0b-00128a01.pphosted.com (mx0a-00128a01.pphosted.com [148.163.135.77]) (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 241D937C109; Mon, 6 Jul 2026 02:09:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.135.77 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783303783; cv=none; b=CrT5J7IcwMskv4KZyzIiruG2cO+vvk4dCzwCpxzo2bWuL5Ag6+ancOgsJgnkJZg4d6lh5jhgJWSxf4PhNshfwhk8Vqu3TfS8wAIMEnnavtR6iRJIlz8lBFgI+Q0rWhqQ5YoEYG+ZFD0/Za98u6s4NEFIFR3bQu4I/mvaBKaUKLU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783303783; c=relaxed/simple; bh=zZXRPOLanBG9xGhl0Bdk0xzGHSR0Jb/0GCj6E+Fek7g=; h=From:Date:Subject:MIME-Version:Content-Type:Message-ID:References: In-Reply-To:To:CC; b=Y0ybE1OVskL1UbRbNf6B/wZKZGLG/XC4CWYZL+gdEoT/aKjzqavfrjWK1bY1ixlpFAYSXkeuldm9Gb6N2iGdA6vXU5EqsQMhqEheEfcQK5Up3xzkEhQjY9+UH0AWwcxO2ozqvTJHo+l0IFuKhKBF9g3JOcb/g5zUSnuA3Nv8RRY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=analog.com; spf=pass smtp.mailfrom=analog.com; dkim=pass (2048-bit key) header.d=analog.com header.i=@analog.com header.b=x5nuSzUF; arc=none smtp.client-ip=148.163.135.77 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=analog.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=analog.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=analog.com header.i=@analog.com header.b="x5nuSzUF" Received: from pps.filterd (m0375855.ppops.net [127.0.0.1]) by mx0b-00128a01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 665M34U03100652; Sun, 5 Jul 2026 22:09:26 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=analog.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=DKIM; bh=P5swf zEg8mwmOtHZ8NB0BYRHSGzAO8Kw7yUhbzzqamk=; b=x5nuSzUF34O5dDa3dV/t6 aJs08/FUSkoCqcMvmsqiISe/8rIRoPY0FMQJa+kBxEREzZZfUsn1WRaJ/PQB7yEb Nlh4AnpoXDkP8qYtiK476h6NxPbCctmSvLxwYFTQn8WQP/REQdIXZvmbXZCX6ApT 8aEbrZYtRZrgH+otVLXVbUVd3oUpAGCcGthILUAbk0FD1Egk4NjmKtqW2JYsKQ5U MVKr7/x6eFm0jPYJpD4XamU2LpItEbzPXBnbyAwMJgfzTn707YuBIEPNQbn4LqQW hntikDBNzskHNsTslHnZn29s/plmVHbYRvA+sxyGvv98+MXedi8sSnQEhoimhfxJ g== Received: from nwd2mta4.analog.com ([137.71.173.58]) by mx0b-00128a01.pphosted.com (PPS) with ESMTPS id 4f7ggbt5na-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sun, 05 Jul 2026 22:09:25 -0400 (EDT) Received: from ASHBMBX9.ad.analog.com (ASHBMBX9.ad.analog.com [10.64.17.10]) by nwd2mta4.analog.com (8.14.7/8.14.7) with ESMTP id 66629Orf045199 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Sun, 5 Jul 2026 22:09:24 -0400 Received: from ASHBCASHYB4.ad.analog.com (10.64.17.132) by ASHBMBX9.ad.analog.com (10.64.17.10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1748.37; Sun, 5 Jul 2026 22:09:24 -0400 Received: from ASHBMBX8.ad.analog.com (10.64.17.5) by ASHBCASHYB4.ad.analog.com (10.64.17.132) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1748.37; Sun, 5 Jul 2026 22:09:24 -0400 Received: from zeus.spd.analog.com (10.66.68.11) by ashbmbx8.ad.analog.com (10.64.17.5) with Microsoft SMTP Server id 15.2.1748.37 via Frontend Transport; Sun, 5 Jul 2026 22:09:24 -0400 Received: from ATORRENO-L02.ad.analog.com ([10.66.6.191]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 66628o7U015791; Sun, 5 Jul 2026 22:09:18 -0400 From: Alexis Czezar Torreno Date: Mon, 6 Jul 2026 10:08:45 +0800 Subject: [PATCH v2 5/5] hwmon: (pmbus/max20830): add support for max20830c and max20840c Precedence: bulk X-Mailing-List: devicetree@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: <20260706-dev-max20830c-v2-5-37761e89bb5f@analog.com> References: <20260706-dev-max20830c-v2-0-37761e89bb5f@analog.com> In-Reply-To: <20260706-dev-max20830c-v2-0-37761e89bb5f@analog.com> To: Guenter Roeck , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jonathan Corbet , Shuah Khan CC: , , , , "Alexis Czezar Torreno" X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1783303730; l=4454; i=alexisczezar.torreno@analog.com; s=20250213; h=from:subject:message-id; bh=zZXRPOLanBG9xGhl0Bdk0xzGHSR0Jb/0GCj6E+Fek7g=; b=rUC8yh6XCHPrFXQ74fRS6BvV4bl2aiim66ITc7qONzvNYvYasj4gQI89D1s+OeoC7aS0Zxjpu khK3qT2Ptg0D8UktLBa5lf9DUDqz8LyAj7FlVC2Y9zId5CuZJr3TDsx X-Developer-Key: i=alexisczezar.torreno@analog.com; a=ed25519; pk=XpXmJnRjnsKdDil6YpOlj9+44S+XYXVFnxvkbmaZ+10= X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-GUID: _lAHBeDG1_-l5JKOtJFHD6lBm4I_GFzn X-Proofpoint-Spam-Info: AW1haW4tMjYwNzA2MDAxOSBTYWx0ZWRfX/xPpJlXdcx62 aoEsGWRY4CKqmU8chJrY1JhL4YwVggvBEU4Xw/CHuJ/C/kvdcVjSAQkP43gRi1oMLLP824o85mS cuiR/EfpzEEwmGpXtSGaertVQYpEjHPmwelSUpV8wk6bhVsb/kgU X-Authority-Analysis: v=2.4 cv=TPx1jVla c=1 sm=1 tr=0 ts=6a4b0e55 cx=c_pps a=3WNzaoukacrqR9RwcOSAdA==:117 a=3WNzaoukacrqR9RwcOSAdA==:17 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=0sLvza09kfJOxVLZPwjg:22 a=N--XFCr6TIEc_64PeIT2:22 a=gAnH3GRIAAAA:8 a=v52DSUhV1VzBc46Xrp8A:9 a=QEXdDO2ut3YA:10 X-Proofpoint-ORIG-GUID: _lAHBeDG1_-l5JKOtJFHD6lBm4I_GFzn X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzA2MDAxOSBTYWx0ZWRfX0SXWBpvq7Vb4 uu7Idvfv7qfehnRJDTpJZVDSn/kPaI7yw+LS6RpAniKfpEdtIdf5kMX/9Drbj6duExmr1k6L5WC mE7ulYEIjAAYypeVYzx0JdGHGyWfDt0ZgE1kUNSFPnoSVoFYOG3tNDjNjvLgd0kNNY28P7zcupT qMaOplwKBTZxV8hBTYl1QQB5WVeCvo4KRkF+TkunxIakvDjai4WjkcLL/TJRV/NUQMFMnku0QHu WzJ5prVvbH8Qcbb7rRnCE5jrFS+/cM1vcSCahA3tccac0NrXZoCEvjS+KtO+95bLufe6KJVW1Za gYwOFGz+NtsijJojHaMV6BZOSRb8zd/10HagqQOT2LrG+6iUqpgwjkWbythicAF+JeajO7RYHy5 L/EXSvO3V4oUHBuaIqW4jIoz4cjdshp/AZdYcv6Iqv6MzBsLDysZ8gIaVleWyyYK3lXhNc7Pd+a 45aKcg8rcR74iYH5DDA== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-07-05_02,2026-07-03_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 spamscore=0 clxscore=1015 bulkscore=0 adultscore=0 lowpriorityscore=0 phishscore=0 impostorscore=0 suspectscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607060019 Add support for MAX20830C and MAX20840 step-down DC-DC switching regulator with PMBus interface. MAX20830C is a different packaging for MAX20830, and MAX20840C supports 40A regulation compared to MAX20830 that is only 30A. Signed-off-by: Alexis Czezar Torreno --- Documentation/hwmon/max20830.rst | 27 ++++++++++++++++++++++----- drivers/hwmon/pmbus/max20830.c | 27 ++++++++++++++------------- 2 files changed, 36 insertions(+), 18 deletions(-) diff --git a/Documentation/hwmon/max20830.rst b/Documentation/hwmon/max20830.rst index 936e409dcc5c0898dde27d782308d4a7e1357e73..b850f3b6e40d1f1d0cec944be40af02265aced59 100644 --- a/Documentation/hwmon/max20830.rst +++ b/Documentation/hwmon/max20830.rst @@ -13,6 +13,22 @@ Supported chips: Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/max20830.pdf + * Analog Devices MAX20830C + + Prefix: 'max20830c' + + Addresses scanned: - + + Datasheet: + + * Analog Devices MAX20840C + + Prefix: 'max20840c' + + Addresses scanned: - + + Datasheet: + Author: - Alexis Czezar Torreno @@ -21,12 +37,13 @@ Author: Description ----------- -This driver supports hardware monitoring for Analog Devices MAX20830 -Step-Down Switching Regulator with PMBus Interface. +This driver supports hardware monitoring for Analog Devices MAX20830, MAX20830C +and MAX20840C. These are Step-Down Switching Regulator with PMBus Interface. -The MAX20830 is a 2.7V to 16V, 30A fully integrated step-down DC-DC switching -regulator. Through the PMBus interface, the device can monitor input/output -voltages, output current and temperature. +MAX20830, and MAX20830C are 2.7V to 16V, 30A fully integrated step-down DC-DC +switching regulators. MAX20840C is similar but can reach 40A. Through the PMBus +interface, these devices can monitor input/output voltages, output current and +temperature. The driver is a client driver to the core PMBus driver. Please see Documentation/hwmon/pmbus.rst for details on PMBus client drivers. diff --git a/drivers/hwmon/pmbus/max20830.c b/drivers/hwmon/pmbus/max20830.c index 5aad4448054fc55bb0a87920d89f96bc28fda072..88fc45447792b1fea7691dee9fb385238c5d82c1 100644 --- a/drivers/hwmon/pmbus/max20830.c +++ b/drivers/hwmon/pmbus/max20830.c @@ -93,13 +93,12 @@ static int max20830_probe(struct i2c_client *client) * which do not support SMBus block reads. */ if (i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_READ_BLOCK_DATA)) { - /* Reads 9 Data bytes from MAX20830 */ ret = i2c_smbus_read_block_data(client, PMBUS_IC_DEVICE_ID, buf); if (ret < 0) return dev_err_probe(&client->dev, ret, "Failed to read IC_DEVICE_ID\n"); } else { - /* Reads 1 length byte + 9 Data bytes from MAX20830 */ + /* Reads 1 length byte + data bytes */ ret = i2c_smbus_read_i2c_block_data(client, PMBUS_IC_DEVICE_ID, MAX20830_IC_DEVICE_ID_LENGTH + 1, buf); @@ -115,26 +114,28 @@ static int max20830_probe(struct i2c_client *client) ret = ret - 1; } - /* - * MAX20830 IC_DEVICE_ID sends string data "MAX20830\0". - * Return value should at least be 9 bytes of data. - */ + /* Verify we read the expected number of bytes */ if (ret < MAX20830_IC_DEVICE_ID_LENGTH) return dev_err_probe(&client->dev, -ENODEV, - "IC_DEVICE_ID too short: expected at least 9 bytes, got %d\n", - ret); + "IC_DEVICE_ID too short: expected %d bytes, got %d\n", + MAX20830_IC_DEVICE_ID_LENGTH, ret); + + /* Null-terminate the string */ + buf[ret] = '\0'; - /* 9 bytes of data, buf[0]-buf[7] = "MAX20830", buf[8] = '\0' */ - buf[MAX20830_IC_DEVICE_ID_LENGTH - 1] = '\0'; - if (strncmp(buf, "MAX20830", MAX20830_IC_DEVICE_ID_LENGTH - 1)) + /* Verify the device ID matches what we expect */ + if ((strcmp(buf, "MAX20830") && strcmp(buf, "MAX20830C") && + strcmp(buf, "MAX20840C"))) return dev_err_probe(&client->dev, -ENODEV, - "Unsupported device: '%s'\n", buf); + "Unsupported device: '%*pE'\n", ret, buf); return pmbus_do_probe(client, &data->info); } static const struct i2c_device_id max20830_id[] = { - {"max20830"}, + { "max20830" }, + { "max20830c" }, + { "max20840c" }, { } }; MODULE_DEVICE_TABLE(i2c, max20830_id); -- 2.34.1